t3eological Survey Branch Assessment Report Indexing System
[ARISI IA] ARIS Summary Report
Regional Geologist, Smithers Date Approved: 2005.03.23 Off Confidential: 2005.12.01
ASSESSMENT REPORT: 27556 Mining Division(s): Omineca -
Property Name: Brenda NAD 27 Latitude: 57 16 00 Longitude: 126 52 00 UTM: 09 6348874 628660 Location: NAD 83 ~atitudei57 15 59 Longitude: 126 52 06 UTM: 09 6349052 628555 NTS: 094E07W BCGS: 094E026 Camp: 051 Toodoggone Camp
Claim@): Jan 2, Tom 4
Operator(s): Northgate Minerals Corporation, Canasil Resources Inc. Author@): Edmunds, Frederick Carl
Report Year: 2004
No. of Pages: 178 Pages
Commodities Searched For: Gold, Copper
General DRIL, GEOC Work Categories:
Work Done: Drilling DlAD Diamond surface (5 hole(s);NQ HQ) (1445.7 m) No. of maps : 4 ; Scale(s) : 1:2000 Geochemical SAMP Samplinglassaying (686 sample(s);) Elements Analyzed For : Multielement
Keywords: Jurassic, Toodoggone Formation, Andesites, Phyllites, Pyrite, Chalcopyrite, Sphalerite
Statement Nos.: 3221293
MlNFlLE Nos.: 094E 147,094E 107
Related Reports: 13064,14789,15555,18441,20963,22248,22820,23385,24628,25439,27161
Ministry of Energy and Mines Wednesday, March 23, 2005 Page #: 1 ASSESSMENT REPORT - 2004 EXPLORATION PROGRAM
BRENDA PROPERTY:
BRENDA DIAMOND DRILL PROGRAM
(BRENDA4, BRENDA5, BRENDAG, TOM4, JANZ)
OMENICA MINING DIVISION BRITISH COLUMBIA
CENTERED ON:
LATITUDE: 57' 16' North LONGITUDE: 126' 52' West
BCGS 094E026,094E027
- Owned and Operated By-
Northgate Minerals Corp. Kemess Mines Ltd. 404-81 5 Hornby Street Vancouver, British Columbia V6Z 2E6 Canada
Under Option Agreement With:
Canasil Resources Inc. 200-1695 Marine Drive North Vancouver, British Columbia V7P 1V1 Canada
November 2004 F.C. Edmunds M.Sc. P.Geo.
B.G. Kay B.Sc. GIT Northgate Minerals Corp. 2004 Exploration Program
0 1.0 EXECUTIVE SUMMARY This report details exploration work carried out during the 2004 summer season on the Brenda Property, north-central B.C., by Northgate Minerals Corp. Total expenditures for the season are $246,680. The Brenda Property is subject to an Option and Joint Venture agreement with Canasil Resources Inc. At completion of the 2004 program, Northgate elected not to renew the agreement, and has returned the property to Canasil.
The Brenda Property is located in the mountainous area east of the Spatsizi Plateau and west of the Swannell Ranges near Thutade Lake. It is approximately 270kms north of Smithers and 450kms northwest of Prince George and lies in the Omineca Mining Division.
The Brenda property is underlain by upper Triassic (Takla Group) andesitelbasaltic volcanics and lower Jurassic (Hazleton Group, Toodoggone Formation) dacitic fragmental volcanics. Stocks, dykes and possible sills of quartz monzonitelquartz diorite composition have intruded the succession and are likely also lower Jurassic in age (ArIAr date in progress). Structurally the deposit area is transected by steeply dipping north to northwest trending normal faults.
Porphyry style AuICu mineralization occurs within the Takla volcanic rocks and 0 intermediate intrusive rocks associated with weak to pervasive propyllitic, potassic and locally stronger phyllic alteration assemblages.
The goal of the 2004 drill program was to extend strike length and depth on the NW-SE trending mineralization intercepted in the White Pass zone in 2003. The plan required step-outs north and south from BR-03-06 and 07, and stepping back from the interpreted trend to build depth extent. The 2004 Brenda exploration was carried out as a two-phase, 5 hole, diamond drill program totaling 1446 meters drilled between July 7 and September 15'~2004.
The 2004 exploration program proved that the White Pass zone can be modeled with some degree of certainty, and that mineralization occurs over a strike length now tested up to 520m, and to depth of 450m. Gold mineralization is reasonably evenly distributed and averages in the 0.5 glt area while copper grades are negligible. 1 Northgate Minerals Corp . 2004 Exploration Program
Table of Contents
1.0 EXECUTIVE SUMMARY ...... 2 2.0 INTRODUCTION ...... 4 3.0 LOCATION AND ACCESS ...... 4 4.0 CLAIM DATA ...... 5 5.0 DISTRICT EXPLORATION AND MINING HISTORY ...... 6 6.0 REGIONAL GEOLOGY ...... 7 7.0 STRUCTURAL SETTING...... 8 8.0 PROPERTY GEOLOGY ...... 10 8.1 INTRODUCTION ...... 10 8.2 LITHOLOGY ...... 10 8.3 STRUCTURE ...... 12 8.4 ALTERATION AND MINERALIZATION ...... 12 9.0 2004 EXPLORATION PROGRAM ...... 12 9.1 HOLE DESCRIPTIONS...... 14 9.2 METHODOLOGY ...... 18 10.0 CONCLUSIONS AND RECOMMENDATIONS ...... 19 11.0 STATEMENT OF COSTS ...... 19 12.0 STATEMENT OF QUALIFICATIONS ...... 20 ,! ,! '; 13.0 REFERENCES ...... 22 L- .( 14.0 LIST OF APPENDICES ...... 23
List of Figures
Figure 1 Brenda Property Location Map (Pautler. 2003) ...... 4 Figure 2 Detailed Claim Map with Access roads and MinFile Occurrences. (Pautler. 2003) ...... 6 Figure 3 Regional Geology after Massey et.al. 2003 . Minfile Occurrences plotted by color showing principal commodities as follows: gold - red. silver - blue, and copper - green...... 9 Figure 4 Brenda Geology .(Diakow. 2004) ...... 11 Figure 5 2004 (black boxes) and historical (white boxes) Drill Hole Locations. background is Airborne Magnetic Total Field ...... 13
List of Tables
Table 1. List of Claims...... 5 Table 2 . Brenda Property Work History ...... 7 Table 3 . Regional Stratigraphy (Cope 1992) ...... 8 Table 4 . 2004 Drill Collar Location and Orientation Data ...... 13 Table 5. 2004 Drill Hole Assay Composites - Gold and Copper ...... 17 Table 6 . 2004 Brenda Summary of Expenditures...... 19 Northgate Minerals Corp. 2004 Exploration Program
2.0 INTRODUCTION
This report details exploration work carried out during the 2004 summer season on the Brenda Property, north-central B.C., by Northgate Minerals Corp. The Brenda Property is subject to an Option and Joint Venture agreement with Canasil Resources Inc. Under this agreement, Northgate can earn a 60% interest by staged payments totaling $140,000 and exploration expenditures totaling $2,000,000 over 4 years. At completion of the 2004 program, Northgate elected not to renew the agreement, and has returned the property to Canasil.
3.0 LOCATION AND ACCESS
The Brenda Property is located in the mountainous area east of the Spatsizi Plateau and west of the Swannell Ranges near Thutade Lake approximately 270kms north of Smithers and 450kms northwest of Prince George at 57'16' north latitude and 126'52' west longitude. The property, shown in Figure 1, spans the boundary between the 94E and 94D NTS sheets and lies in the Omineca Mining Division.
BRITISH COLUMBIA
VICTORIA
OMKm
Figure 1 Brenda Property Location Map (Pautler, 2003) Northgate Minerals Corp. 2004 Exploration Program
Access to the project is provided by both air and road. There are regularly scheduled year-round flights from Vancouver, Smithers, and Prince George to 0 Kemess Mine. Road access is available from the town of Mackenzie or Ft. St. James via the Omineca Resource Access road.
The area is characterized by broad, open, drift and moraine covered valleys, yielding to sub-alpine plateaus and rugged incised peaks and cirques. Elevations range from 1200m to 1800m, with the tree line occurring at 1500m.
The climate is generally moderate, although snow can occur during any month. Temperatures range from -35" to 30'' and average annual precipitation amounts to 890mm.
4.0 CLAIM DATA Table I.List of Claims
Tenure# Claim Name Expiry* Units Tag 7 238271 BRENDA #I 5/30/2014 1 244475M 2391 00 JAN 6 5/30/2014 4 84685 238272 BRENDA #4 5/30/2014 1 244478M JAN 7 (7 238273 BRENDA#5 513012014 I 244479M JAN 8 .-.-/ 238274 BRENDA #6 5/30/2014 1 244480M POCK 238275 BRENDA #7 5/30/2014 1 244481M HANS 238276 BRENDA #8 5/30/2014 1 244482M TOM 4 238770 JAN 1 513012014 6 95491 JAN #9 238771 JAN 2 513012014 16 95492 TOM 3 238872 MAX NO. 1 5/30/2014 1 244471M TOM 5 238873 MAX 2 5/30/2014 1 244472M KATH 1 238874 MAX 3 5/30/2014 1 244473M KATH 3
-- -- Claims: 11 Units: 31 Claims: 11 Units: 147
*Prior to acceptance of this statement of work. All Claims: 22 All Units: 178 Northgate Minerals Corp. 2004 Exploration Program
Figure 2 Detailed Claim Map with Access roads and MinFile Occurrences. (Pautler, 2003)
5.0 DISTRICT EXPLORATION AND MINING HISTORY The earliest reports of exploration activity in the area date back to the discovery of placer gold at the mouth of McConnell Creek in 1889. Several years later there was a brief staking rush in 1907 and pr'ospecting remained active in the area through the early 1920's resulting in a placer discovery at McClair Creek. Cominco Ltd. was active in the area in the 1930's exploring for base metals.
In 1966 Kennecott focused on the area searching for Cu-porphyry systems using stream geochemical techniques and prospecting; this work resulted in claim staking and field work on several prospects including Kemess North, Pine, Fin, Chapelle (aka Baker), Shasta and Lawyers. The latter three deposits are gold- silver epithermal vein systems that eventually produced during the early 1980's. Kennecott's work opened the area up with respect to potential for Cu-Au porphyry systems, and the ensuing work at Brenda is summarized below in Table 2. Northgate Minerals Corp. 2004 Exploration Program
Table 2. Brenda Property Work History I 0
Era Activity 1950 Discovery of gold-bearing epithermal quartz veins along Jock and Red Creeks 1980-85 Prospecting and hand trenching on veins by Canmine Development Co. Ltd 1988 Cypress Gold Canada Inc. diamond drilled 1219m in 12 holes on the epitherm al veins 1989-91 Soil geochemistry and trenching by Canasil Res. Inc. with discovery of White Pass gold-copper porphyry Zone 1992 Canasil drilled 271m in 4 holes on the White Pass Zone 1993 Diamond drilling of 958m in 6 holes, IPIresistivity, magnetic and expansion of soil surveys by Romulus Res. Ltd on White Pass grid 1994-97 Soil geochemistry, hand trenching, 1919m of diamond drilling in 16 holes on White Pass and East Creek Zones by Canasil 2002 Airborne magnetic, radiometric and satellite imaging surveys followed by 1650m of diamond drilling in 4 holes by Northgate 2003 5 DDH 1484m completed by Northgate
i* I, ) 6.0 REGIONAL GEOLOGY Mesozoic arc-related volcanic rocks that comprise the eastern margin of the Intermontane Belt underlie the district over an area measuring 100 by 40 kms. The oldest rocks in the belt are Permian Asitka Group, which are disconformably overlain by upper Triassic Takla Group, which are in turn unconformably overlain by lower-middle Jurassic Hazelton Group; overlapping all these assemblages to the west are upper Cretaceous Sustut Group sediments. The lithologic units comprising the stratigraphic succession are described in Table 3 below.
Intrusive rocks are prevalent in the area and have been categorized as late Triassic Alaskan-type ultramafics such as pyroxene diorite, hornblende gabbro and pyroxenite. Economically more significant are the early Jurassic intrusives of the Black Lake suite, which are granodiorite, hornblende diorite, pyroxene quartz- diorite, quartz-monzonite and quartz monzodiorite. Important plutonic masses are the Duncan Lake stock (197.3 Ma), the Sovereign stock (202.7 Ma) and the Maple Leaf pluton (199.6 Ma). The latter hosts the Cu-Au deposit at Kemess South.
The map shown in Figure 4 from Massey et. al. 2003 shows the district geology, major intrusive masses, and deposits. --
Northgate Minerals Corp. 2004 Exploration Program
Table 3. Regional Stratigraphy (Cope 1992)
Age Lithostratigraphic Description Unit Cretaceous Sustut Group Sustut rocks grade from Brothers Peak Formation conglomerate, sandstone, mudstone with minor tuffaceous units down to the basal Tango Creek Formation polymictic conglomerate, sandstone, mudstone with minor lignite seams.
L-M Jurassic Hazelton Group Uppermost unit, Smithers Formation is dominated by greywacke, lithic sandstone, siltstone, tuffaceous shale, volcanic breccia, conglomerate and limestone. Below lies the Nilkitkwa Formation, which is mainly shale, greywacke, andesitic-rhyolitic tuff with minor limestone. In the Kemess area the quartz phyric volcaniclastic rocks of the Toodoggone Formation are believed to be correlative to the Nilkitkwa. The basal assemblage, Telkwa Formation comprises basaltic to rhyolitic pyroclastic and flow rocks.
U. Triassic Takla Group Highest units are Moosevale Formation augite porphyry, breccia, sandstone and mudstone. Central assemblage is Savage Mtn. Formation comprised of flows and pyroclastic augite porphyritic volcanic rocks. Base of the exposed sequence is Dewar Formation argillite, limestone and siltstone.
Mid Asitka Group Uppermost units are dominated by limestone and tuff, which give way to Pennsylvanian a middle assemblage of basaltic flows and rhyolite. The lowermost units are basalt, argillite,chert and limestone. Permian
7.0 STRUCTURAL SETTING For the most part the volcanic Mesozoic assemblages are upright shallowly dipping flat-lying sequences crosscut by high angle north to northwest trending faults. Significant structures are the Finlay-lngenika and Moosevale fault systems, which bound the eastern margin of the belt. These structures are dextral strike-slip features that are related to the terrain bounding faults between the Intermontane and Omineca belts. Northgate Minerals Corp. 2004 Exploration Program
Figure 3 Regional Geology after Massey et.al. 2003. Minfile Occurrences plotted by color showing principal commodities as follows: gold - red, silver - blue, and copper - green. Northgate Minerals Corp. 2004 Exploration Program
More local to Brenda are the Pillar and Saunders Faults, which are north- northwest normal block fault structures. Thrust faulting is present in the district and is interpreted as Eocene or younger; displacement believed to be towards the northeast and effects rocks from the Takla up to Sustut sediments.
The district represents the results of three superimposed volcanic arc building stages that began in the upper Paleozoic. Marine volcanic and sedimentary successions dominated until the lower-middle Jurassic, when continental, quartz- normative volcanism began with the deposition of the Hazelton Group- Toodoggone Formation sequences. The plutonic rocks of the Black Lake suite are coeval with the Toodoggone sequence and are likely co-magmatic. Block faulting has juxtaposed and exposed panels of varying depth from the magmatic and volcanic systems. The structures and intrusives likely had a strong influence on the eventual positioning of volcanic centers. 8.0 PROPERTY GEOLOGY
8.1 INTRODUCTION The Brenda property is underlain by upper Triassic (Takla Group) andesitelbasaltic volcanics and lower Jurassic (Toodoggone Formation) dacitic fragmental volcanics. Stocks, dykes and possible sills of quartz monzonitelquartz diorite composition have intruded the succession and are likely also lower Jurassic in age (ArlAr date in progress). Structurally the deposit area is transected by steeply dipping north to northwest trending normal faults.
Porphyry style AuICu mineralization occurs within the Takla volcanic rocks and intermediate intrusive rocks associated with weak to pervasive propyllitic, potassic and locally stronger phyllic alteration assemblages. Figure 4 shows the general property geology in the area around Brenda. 8.2 LITHOLOGY Andesite Volcanics (Takla Group -Tv) The property is predominantly underlain by a thick (>400m) succession of andesitic flows. The flows exhibit textures ranging from fine grained and massive to porphyritic with medium grained and mostly phyric, subhedral augite phenocrysts. Less common are phenocrysts of plagioclase. The fine-grained matrix is mostly comprised of plagioclase, quartz, and chlorite. The plagioclase is usually sericitized. Rare intersections of auto-brecciated flows occur as coarse sub-rounded andesitic clasts within both phyric and finer grained flows. The Takla volcanic rocks host a significant portion of the Au-Cu mineralization. Northgate Minerals Corp. 2004 Exploration Program
Figure 4 Brenda Geology - (Diakow, 2004)
Dacitic Polvlithic Fraamental (Hazelton Group:Toodoggone Formation - HTM) Sub-rounded angular coarse fragments of feldspar porphyry, andesite, and rare quartz-feldspar porphyry occur within a siliceous (dacite) matrix. Lithic proportion to matrix is inconsistent ranging from 1-30% volumetrically, with clast size varying from lapilli to blocks. The matrix is fine-grained, dark gray comprised of 10-30% medium grained feldspar and diagnostic rare quartz phenocrysts. Magnetite is common as an accessory mineral occurring as very fine-grained disseminations as is distinctive zeolite-calcite veinlets. Propyllitic (epidote- calcite-pyrite) alteration is dominant within the fragmental, however narrow (10- 20m) zones of phyllic (quartz-sericite-pyrite) alteration are present near discordant contacts with the Takla Group. The phyllic sections can carry anomalous gold concentrations.
Quartz MonzoniteIQuartz Diorite (Black Lake Intrusive Suite - BLd These intermediate intrusive units are comprised of subhedral phenocrysts of 50% plagioclase and 40% quartz set in a groundmass of quartz-feldspar- chlorite +I- biotite with accessory minerals including; magnetite, apatite, carbonate, rutile, ilmenite, sphene. The quartz monzonite outcrops as a swarm of north-northwest trending subvertical dykes which crosscut both Takla and Hazleton volcanics in the White Pass Zone (labeled MinFile #094E 147 in Figure 4)- Northgate Minerals Corp. 2004 Exploration Program
Post-Mineral Dvkes 0 Mafic dykes are generally thin at < 1 to 4 meters wide, dark green and barren of sulphides and veining. Observations from regional mapping suggest they are related to the volcanic strata interbedded within Sustut Group sedimentary rocks and are interpreted as Cretaceous.
8.3 STRUCTURE Due to intense alteration and the lack of bedding and/or marker horizons, the inclination of the massive thick succession of Takla volcanics is difficult to ascertain but probably reflects the regional trend of flat lying Mesozoic assemblages.
Steeply dipping, southeast trending normal faults have been inferred from surface mapping and drilling to transect the Brenda property. Fault spacing ranges from 500 and 1500 meters and they are generally parallel to the Pillar and Saunders Faults located to the west.
Local E-W drainage patterns suggest some late structural movement in this regime. Offsets are minor, but may be significant in dislocation of mineralized panels in the White Pass zone.
0 8.4 ALTERATION AND MINERALIZATION The northern end (BR-04-10, 13, 14) of 2004 drilling was characterized by intense phyllic alteration (sericite - quartz - pyrite), with rare local underpinnings of strong potassic (quartz - potassium feldspar - anhydritelgypsum) noted in BR- 04-10 only. Southern intercepts (BR-03-06, -04-1 1, 12) show patchy, moderately intense propyllitic alteration consisting of calcite, minor epidote and rare zeolite veining. This occurs in volcanic panels between bounding fresh monzonite dykes in the White Pass Zone.
Mineralization consists of abundant fine-grained disseminated pyrite, rare sphalerite, and traces of chalcopyrite (often veined with magnetite) and molybdenite (typically in quartz veins).
The 2004 Brenda exploration was carried out as a two phase, 5 hole, diamond drill program totaling 1446 meters drilled between July 7 and September 15'~ 2004. Britton Bothers Diamond Drilling of Smithers B.C performed the drilling and reclamation work. Lepka Holdings of Ft. St. James completed pad construction for BR-04-14. Core samples were logged by geologists, then split with a hydraulic core splitter. Half split core is retained at site in core racks. A total of 686 samples were prepared and shipped to ALSChemex in Vancouver for analysis. Drill hole collar locations are shown in Figure 5 (also Appendix 4) and 0 are tabulated, together with orientation and hole length data, in Table 4. Northgate Minerals Corp. 2004 Exploration Program
Table 4. 2004 Drill Collar Location and Orientation Data
Hole # I NAD83 N I NAD83 E I Elev. m I Azimuth I Dip I Depth m BR-04-10 6347906 628490 1620 55O -70° 353.6 BR-04-11 6347504 6284 14 1460 55O -60° 128 BR-04-12 6347518 628602 1475 55O -70° 225.6 BR-04-13 6347850 628680 1620 55O -60° 287.4 BR-04-14 6348006 628426 1550 70° -70° 451.1
Figure 5 2004 (black boxes) and historical (white boxes) Drill Hole Locations, background is Airborne Magnetic Total Field
The goal of the 2004 drill program is to extend strike length and depth on the NW-SE trending mineralization intercepted in the White Pass zone in 2003. The plan required step outs north and south from BR-03-06 and 07, and to step back from the interpreted trend to build depth extent. Northgate Minerals Corp. 2004 Exploration Program
9.1 HOLE DESCRIPTIONS
Target Hole BR-04-10 tested the northern extent of mineralization intercepted deep in hole BR-03-07. The collar was set on the ridge top, the furthest north road- accessible pad location approximately 65m NNE of BR-03-07 collar.
Results The hole collared in oxidized Black Lake monzonite before passing through a broad fault zone at 96m, and intercepting intensely phyllic-altered andesite interpreted as Takla volcanics, a unit colloquially called QSP (Quartz Sericite Porphyry). This interpretation is made on the basis of rare augite ghost porphyritic texture, suggesting the Andesite Augite Porphyry (AAP) unit of the Takla succession noted elsewhere on the property. Mineralization in this unit consists of significant (to 10%) fine-grained disseminated pyrite throughout. Chalcopyrite and Blackjack sphalerite appear sporadically throughout the interval, becoming more common with depth. Alteration appears to be strong phyllic (sericite - quartz +I- clay, gypsum) overprinting potassic (quartz - Kspar - anhydrite), which appears only very locally. A thin plagioclase porphyritic dyke was intercepted at 294-309m, and the hole terminated in another dyke of the same type-. at 354m.
This hole suggests considerable depth extent to the White Pass zone, which remains open. It also suggests that hole BR-03-07 may have been shut down prematurely, and re-entering that hole should be considered. Preliminary geometric analysis on the hanging wall monzonite contact suggests a strike of 166' and dip of 72' to the WSW. The footwall dykes appear to be north striking but dip cannot be resolved. These interpretations are very approximate due to poor Z control on collar elevations. Differential GPS pick-ups will be required to properly model the system.
Grades appear strongest near monzonite dyke contacts, strengthening the hypothesis that these are important, syn-mineral features. As the table below shows, the highest grade portions of the mineralized zone are at either end. The porphyritic dyke intercepted from 293.8-309.1 m returned background gold (-O.lg/t) across, but country rock next to contacts were of considerably higher grade (0.97 glt upper contact, and 0.43 glt lower).
Target Hole BR-04-11 was spotted 150m SW of BR-03-06 in order intercept the down da plunge and along strike extension of gold mineralization returned therein. Northgate Minerals Corp. 2004 Exploration Program
Azimuth remained on section at 055' and dip was flattened slightly to -60' in order to reach a second topographical low 20m to the NW. The interpreted geometry of the mineralized zone is a SW dipping panel of Hazleton and Takla volcanics sandwiched between Black Lake Monzonite dykes.
Results The hole collared in a fault zone, and continued throughout until termination at 128m. Recovery was rarely above 30%, with significant intervals (to 5m) of zero recovery. Decision was made to abandon the hole as rods were becoming stuck in blocky ground. The upper 60m of the hole is dominated by intrusives with rare volcanics. Monzonite and plagioclase porphyry blocks were noted with significant amounts of fault gouge. The Hazleton-Takla contact was identified by the loss of quartz phenocrysts and significant decrease in magnetite content.
The fault intercepted had previously been interpreted to be Saunders parallel (NNE) and steeply west dipping. This hole suggests that the structure is likely east dipping, or has some antithetic east dipping conjugates, which the hole followed.
No significant assays.
Target Hole BR-04-12 was spotted 150m along strike from BR-03-06 to the SE. It tests the southern extremity of a large airborne magnetic anomaly which covers the White Pass area (see Figure 5).
Results Ground conditions in BR-04-12 were difficult throughout, requiring extended use of HQ gear to 180m. Ground improved slightly thereafter but showed weak alteration and mineralization, resulting in early shutdown at 225.6m. The hole passed through several panels of propyllitic-altered Toodoggone andesitic to basaltic volcanics with thin Monzonite dykes interspersed.
Initial interpretation of strike orientation based on BR-03-06 and BR-03-07 was used to spot this collar, however the results of BR-04-10 now suggest a more N- S orientation. The mineralization intercepted in BR-03-07 and BR-04-10, similar to each other, bore little resemblance to that noted in BR-03-06, which BR-04-12 resembles closely. This hole suggests greater impact of late E-W structures, and forces the hypothesis that there are multiple, dissected zones in the White Pass area. These two zones are on opposite sides of a break in slope, across which ground conditions and alteration are significantly changed. Northgate Minerals Corp. 2004 Exploration Program
Target Hole BR-04-13 attempted to identify structurally parallel zones to the east of White Pass. The collar was set 170m east of BR-03-07 at a dip of -60' to reach across a recessive topographical feature interpreted as the Takla AAP unit between bounding Black Lake intrusives. A northward position was chosen in order to collar in the same E-W fault block as BR-04-10 and BR-03-07.
Results Core returned from hole BR-04-13 did reflect the structural pattern expected. Monzonite dykes were thinner and ubiquitous, intruding every 30m down hole. The intervening volcanics were massive and fine grained but with no remnant textures visible where QSP phyllic alteration is intense. No augite ghosts, rarely noted in BR-04-10, were noted here. Magnetization is strong, and local volcanic breccia textures are well preserved where alteration intensity decreases. Based on these features, this package has been coded as Toodoggone (Hazleton). Recovery in the volcanic zones is typically poor, as drill bit exits monzonite dykes into softer rock there is often a ground zone up to Im. Assay data in these intervals may be under-represented. Structural patterns reflected in outcrop and drill core suggest this zone is analogous to the BR-03-07 and -04-10 intercepts but in a separated panel.
While grades in this hole are disappointing, the same pattern of alteration and 0 mineralization as in BR-03-07 and BR-04-10 was intercepted. Higher-grade material was altered volcanics found closest to intrusive contacts, with a lower grade central core.
A highly altered, mottled unit was found at the bottom of the hole, which may represent a new intrusive phase. This unit may be significant in its alteration, as all other intrusives intercepted thus far have been, at best, mildly altered. Texturally, the unit resembles the monzonite dikes, but with strong sericite quartz replacement. Whole rock geochemistry does not support this hypothesis (see Appendix) therefore the unit has been coded as Hazleton andesite, pending confirmation by petrographic analysis. Northgate Minerals Corp. 2004 Exploration Program
Target A follow up hole to BR-04-10 was spotted along strike to the north. The collar was spotted 60m down hill from the crest of the ridge and slightly west, to account for the topographic effect of the west dipping zone. Mineralization encountered down hole resulted in the hole being extended 100m deeper than planned.
Results The hole collared in monzonite dyke with short intervals of Hazleton volcanics to 146m. Larger widths of Takla volcanics with small dykes continue to end of hole at 451m. A 14m interval of 0.6glt Au exists directly below the Hazelton - Takla contact, but the significance of this is not known. Gold grades build with depth in largely phyllically altered Takla vokanics with local zones of intense pervasive silicification. Monzonite dykes are barren, with the exception of one thin dyke at 414m which exhibits background gold, -0.2 glt. This may be due to stoping of mineralized Takla rather than primary mineralization. Gold values peak at 1.5gIt near the bottom of the hole, which terminates in a barren monzonite dyke at 451 .Im.
Table 5. 2004 Drill Hole Assay Composites - Gold and Copper
Final From To Core Length Au Cu # Depth m m m m gpt* %
Including: 331 346 15 0.888 0.032 BR-04-11 128 Abandoned due to adverse ground - No significant assays BR-04-12 225.6 65.5 103.6 38. I 0.362 0.091 108.2 128 19.8 0.539 0.080 131.1 144.8 13.7 0.346 0.097 153.9 169.2 15.3 0.285 0.072 BR-04-13 287.4 18.3 35.1 16.8 0.141 0.032 42.7 64 21.3 0.122 0.033 79.2 97.1 17.9 0.120 0.038 191 235 44 0.145 0.014 BR-04-14 451.1 142 156 14 0.601 0.017 343.1 48 104.9 0.399 0.031 Including: 418.4 442 23.6 0.755 0.029 * For Composite calculations underlimits assays (~0.005g/t) have been assigned the value 0.002 g/t Northgate Minerals Corp. 2004 Exploration Program
1,- 9.2 METHODOLOGY
Collar locations were surveyed by hand-held GPS, and are considered accurate within 10m in plan. Elevation data is taken from the B.C government digital elevation model presented on 1:20000 scale trim, and is considered accurate within 20m. A differentially corrected GPS survey of drill collars is highly recommended.
Down hole surveys were done, for the most part, at 10-foot intervals on each hole using FlexlT borehole survey instruments. Due to the inherent magnetite content of the rock some suspect surveys have been omitted from the down hole survey data. The validity of survey data was determined based on magnetic variation measurements provided by the FlexlT tool.
All drill holes were logged for both geologic and geotechnical properties. Sample intervals were determined by each geologist and usually ranged from 0.3 to 2.0m1 cut according to lithology. Geologic logs, geotechnical logs, assay certificates, and the petrographic report are presented in the Appendix attached to this report.
Core was split using a hydraulic core splitter. Split core samples were passed 0 through a primary crusher at an on-site sample preparation laboratory under the supervision of Bill Smith, Chief Assayer at Kemess Mine.
These 686 core samples were split then crushed to 80% minus 10-mesh at the on-site preparation laboratory. Quality control samples (blanks, duplicates and standards) were inserted into the sample stream at regular intervals such that 1 in 26 samples were submitted for control purposes. A QAQC report is located in Appendices. The 86 prepared samples and 28 quality control samples, weighing approximately 250 grams, were submitted to ALS Chemex Laboratory. At ALS Chemex these samples were pulverized to 90% minus 150-mesh and submitted for 34-element ICP analysis, copper assay by triple acid digestion with an atomic absorption finish, and one assay-tonne gold fire assay with an atomic absorption finish. Northgate Minerals Corp. 2004 Exploration Program
10.0 CONCLUSIONS AND RECOMMENDATIONS 0 The 2004 exploration program proved that the White Pass zone can be modeled with some degree of certainty, and that significant mineralization occurs over strike length now tested up to 520m, and to depth of 450m. Gold mineralization is reasonably evenly distributed in the -0.5glt area. Copper grades are negligible.
Topography is an effective mirror of the subsurface, with monzonite dykes creating resistive ridges while faults and volcanics create recessive gulleys. Late E-W local faulting plays a significant role in juxtaposition of mineralized zones. If properly understood, this structural regime may yield significant new targets.
It appears unlikely that the White Pass zone will develop into an economic ore deposit. The degree of intrusive dilution and structural dissection make a large, open-pit scenario highly problematic. However, potential exists for more zones on the property, any of which may prove economic. A complete synthesis of data from this program with historical work may result in new targets.
11.0 STATEMENT OF COSTS Exploration costs for 2004 totaled $246,680 as outlined in Table 6 below. Table 6. 2004 Brenda Summary of Expenditures
AssayIAnalytical $ 27,591 Drilling $ 167,931 Helicopter $ 14,365 StafflStudents $ 17,145 TrailIPad Construction $ 2,000 Camp Costs $ 6378 Supplies $ 7270 Report Preparation $ 4000 Total $ 246,680 Northgate Minerals Corp. 2004 Exploration Program
1 f.0 STATEMENT OF QUALIFICATIONS I, Frederick Carl Edmunds, of 1115 Queens Ave, West Vancouver, B.C., do hereby certify that:
1. I have supervised the 2004 exploration program completed at Brenda, reviewed all the data contained herein, and contributed to the preparation of this report.
2. 1 graduated from the University of Edinburgh in 1983 with a B.Sc. (Honors) in Geology.
3. 1 graduated from Queens University, Kingston, Ontario in 1988 with an M.Sc. in Mineral Exploration.
4. 1 am a Professional Geoscientist (P.Geo.) registered with the Association of Professional Engineers and Geoscientists of British Columbia, member # 19724, and have been a member in good standing since 1992.
5. 1 am a member of the Society for Mining, Metallurgy and Exploration, member # 897500, and have been a member of good standing since 1992.
6. From 1985 until present I have been continuously employed as a Geologist in mineral exploration.
Dated at, ~~3dwthe day of &-~2004.
F.C Edrnunds P.Geo. Northgate Minerals Corp. 2004 Exploration Program
I, Brian G. Kay, of #215-488 Helmcken St, Vancouver, British Columbia, do hereby certify that:
1. I have co-supervised the 2004 exploration program completed at Brenda, reviewed all the data contained herein, and contributed to the preparation of this report.
2. 1 have studied Geology at Simon Fraser University in Burnaby, British Columbia and received a Bachelor of Sciences degree in 2000.
3. 1 have continuously practiced my.profession as an exploration geologist since graduation.
4. 1 am a member-in-training of the Association of Professional Engineers and Geoscientists of British Columbia. Carl Edmunds P.Geo supervised my work on the Brenda project.
.3 - Dated at, /* c dt the >/ ! day of A/-, v 2004.
>+ B. G. Kay, GIT Northgate Minerals Corp. 2004 Exploration Program
Diakow, L.J. (2004): Geology of the Samuel Black Range Between the Finlay River and Toodoggone River, Toodoggone River Map Area, North-central British Columbia, Parts of NTS 94E/2,6 and 7, B.C. Ministry of Energy and Mines, Open File Map 2004- 4, I:50 000 scale.
Diakow, L.J., Panteleyev, A., Schroeter, T.G., Geology of the Early Jurassic Toodoggone Formation and Gold Silver Deposits in the Toodoggone River Map Area, Northern British Columbia, B.C. Geological Survey Branch Bulletin 86, 1993
Diakow, L.J., Panteleyev, A., Schroeter, T.G., Jurassic Epithermal Deposits in the Toodoggone River Area, Northern British Columbia, Economic Geology, volume 86, pp 529-554, 1991
I Diakow, L.J., Geology of the Southern Toodoggone River and Northern McConnell Creek Map Areas, North-Central British Columbia; BCEM, Map 2001-1, 1:50000 Scale of- Edmunds, F.C., Konst, R.A., 2003 Exploration Program (Diamond Drill Program) on the Kemess Property, Assessment Report, 2003
Massey, N.D.W., Maclntyre, D.G. and Desjardins, P.J. Digital Map of British Columbia: Tile NO9 North Central B.C., B.C. Ministry of Energy and Mines, Geofile 2003-18, - BC Geological Survey
Monger, J.W.H., The Triassic Takla Group in McConnell Creek Map Area, North Central British Columbia, Geological Survey of Canada Paper, 76-29, 1977
Pautler, J., Report on the 2003 Diamond Drill Program on the Brenda Property, Assessment Report, 2003
Rebagliati, C.M., Bowen, B.K, Copeland, D.J., Niosi, D.W.A., Kemess South and North Porphyry Gold-Copper Deposits Northern British Columbia, in Porphyry Deposits of the Northwestern Cordillera of North America, CIM Vo146, 1995
Weishaupt, P.J., Drilling Report: Brenda Property, Assessment Report, 1998 Northgate Minerals Corp. 2004 Exploration Program
0 14.0 LIST OF APPENDICES
Appendix 1: Diamond Drilling Logs with Results Appendix 2: Diamond Drilling Geotechnical Logs Appendix 3: Assay and ICP Certificates - ALS Chemex Appendix 4: Plan Map - 1:2000 DDH Locations Appendix 5: Sections - 1:2000 with Assays
Figure # Hole # Viewing 6 BR-04-10 325' NNW 7 BR-04-11 325' NNW 8 BR-04-12 325' NNW 9 BR-04-13 325' NNW 10 BR-04-14 335' NNW
Appendix 6: Whole Rock Geochemistry 0 Appendix 7: Sampling QAQC Report
L >*d J Brenda Property 2004 Diamond Drill Log Northgate Minerals Corp.
Northing: 6347906 Total Depth: 353.6 m Geologist: Brian Kay . Easting: 628490 Azimuth 55 Elevation: 1620 Dip -70 Drilled: 711 812004 Survey Azimuth Dip
237.7 m 69 O -71°
240.8 m 69 O -71 O
243.8 m 69 O -71° \ b-' 4' 3 Brenda Property 2004 Diamond Drill Log Northgate Minerals Corp.
Northing: 6347504 Total Depth: 128 m Geologist: Brian Kay Easting: 628414 Azimuth 55 O Elevation: 1460 Dip -60 Drilled: 7/12/2004 Survey Azimuth Dip 120.4 m 58 O -59O 123.4 m 58 O -59O 126.5 m 58 O -59'
0, 3 EOOOOOOOOOOOOOOOOOOOOOOOOOO .m $ZX%=tZZS%%%ZSG%%Z2%%S%S3S%%
oo QEEEEEEEEEEEEEEEEEEEEEEEEEE mo + L\q??oqoqqqqq?eqqmq?~v!v!u!\qu!??oqcr! C1 ~z~zz~s~~~~~oooabomwm~mm~mw-b~~zzsq;g;;g~gs NNNNNNNNNNNNNNN
.. w QEEEEEEEEEEEEEEEEEEEEEEEEEE E = tqmYY,q\qy?oqoqqqoo-~~mm,*ur.mo 66s3,,,,,om\omz~w-~~+~d~\d~cj~~~i scr~~~~wwwmmS:~~~,~~,N~N,~~~~P,Sb,~~~~~ z w3 i"? c 'U 3 Brenda Property 2004 Diamond Drill Log Northgate Minerals Corp.
I Hole Number: BR-04-14
Northing: 6348006 Total Depth: 45 1.1 m Geologist: Mark Rein Easting: 628426 Azimuth: Elevation: 1550 ~i~ 1 Drilled: 10/09/2004 -Survey Depth Azimuth Dip Survey Depth Azimuth Dip 79.2 m 72.98 O -67.55O 243.8 m 73.64 -68.28O
85.3 m 64.85 O -66.81° 249.9 m 66.94 O -67.97O
91.4 m 74.49 O -67.37O 256.0 m 74.92 -68.22O
97.5 m 74.41 O -67.44O 262.1 m 75.72 O -68.28O
103.6 m 72.71 O -67.5 O 268.2 m 73.83 O -68.4 O
109.7 m 72.66 O -67.51° 274.3 m 74.4 O -68.41° 115.8 m 73.81 O -67.57O 280.4 m 73.56 -68.35O
121.9 m 72.24 O -67.53O 286.5 m 67.77 O -68.21°
128.0 m 68 O -67.2g0 292.6 m 68.74 O -68.26O
134.1 m 70.18 O -67.44O 298.7 m 72.18 O -68.32O
140.2 m 66.99 O -67.31° 304.8 m 68.83 -68.4 O
146.3 m 74.31 O -67.58O 310.9 m 69.81 O -68.51°
152.4 m 70.77 O -67.48O 317.0 m 67.14 O -68.47O
158.5 m 71.98 O -67.51° 323.1 m 67.21 O -68.55O
68.06 O -68.61°
71.98 O -68.5g0
75.05 O -68.78O
71.56 O -68.82O
68.08 O -68.77O
68.68 O -68.7g0
74.81 O -68.94O
75.24 O -69.1 O
76.37 O -69.06~
72.12 O -69.16~
76.97 O -69.23O
76.5 O -69.15~
Printed: 1511 112004 Front Page:
L 'd Brenda Property 2004 Diamond Drill Log Northgate Minerals Corp. BR-04-10 From (m) To (m) Group* Rock Type Comments 0.0 7.6 CASING
7.6 13.7 H FERRICRETE FAULT ZONE Gouge, ferricrete, likely generated from underlying andesites. Completely altered to iron oxides and clay.
13.7 24.4 H ANDESITE FLOW Sandy-textured volcanic with minor chlorite on fractures. Etched veins, dissolved sulphides? 24.4 25.9 LOST CORE
25.9 27.4 H ANDESITE FLOW One 10cm piece of feldspar porphyry dyke, strongly phyllic altered.
27.4 29.0 LOST CORE
29.0 82.8 B MONZONITE DYKE Massive monzonite, locally augite porphyritic to 3mm, local clots epidote to 3mm.
82.8 84.0 H MAFlC DYKE Salt and Pepper texture fine grained mafics. Calcite filled amydules to 6mm.
84.0 94.5 B MONZONITE FAULT ZONE
94.5 103.6 T ANDESlTlC AUGITE PORPHYRY FAULT Mottled light green grock, all primary textures obliterated, replaced by quartz sericite. Rare ZONE augite ghosts replaced by sericite. Fg disseminated pyrite concentrated near chlorite/gypsum veinlets. Gypsum */-calcite stockworking to 20%.
103.6 293.8 T ANDESlTlC AUGITE PORPHYRY FLOW
293.8 309.1 B LATITE DYKE 40% euhedral plagioclase phenocrysts to 5mm, mostly replaced by epidote. Rare anhedral augite to Zmm, 10%. Chill margins 50 crn of silicification, bleaching, strong pyrite veining.
309.1 344.6 T ANDESlTlC AUGITE PORPHYRY FLOW
344.6 353.6 B LATITE DYKE Dyke wisps in and out. 60% latite, 20% andesite
353.60 EOH 'Groups: A=Asitka, B=Black Lake Intrusives, H=Hazelton(Toodoggone), L=Late Triassic Intrusives, SSustut, T=Takla 4 3 \Brenda Property 2004 Diamond Drill Log Northgate Minerals Corp.
From (m) To (m) Group* Rock Type Comments 0.0 21.3 CASING
21.3 31.8 H LATITE FAULT ZONE Rubbly zone, Very poor recovery. Anhedral plagioclase phenocrysts to Icm to 70% in very fine grained light green matrix with trace epidote on fractures. Plag grains look resorbed. Also minor (5%) basalt with fine feldspar laths to 3mm, may represent host rock to latite dyke. Trace Augite porphyritic volcanics, in small pieces. Reddish brown fault gouge to 20%, shallow core angles to gouge zones where visible.
31.8 47.0 H BASALT FAULT ZONE Rubbly zone continues. Interval dominated (80%) by massive basalt, locally flow brecciated, rarely augite phyric. 10% latite pieces as above. 10% fault gouge.
47.0 56.8 B MONZONITE FAULT ZONE Rubble dominated (60%) by pieces of mildly feldspar porphyritic intrusive. Euhedral feldspars to 4mm 40%, bladed mafics horneblende +/- biotite to 2mm. Locally more feldspar porphyritic (to 6mm). 30% propyllitic basalt.
56.8 59.4 LOST CORE FAULT ZONE
59.4 62.5 H BASALT FAULT ZONE
62.5 65.5 LOST CORE FAULT ZONE
65.5 75.6 H BASALT FAULT ZONE Variably massive and flow brecciated basalt. Strongly magnetic, with moderated calcite veining1 stringer stockworking.
75.6 112.8 T ANDESITE FAULT ZONE Sandy textured massive andesite flows with minor calcite veining/stockworking. Small zones of core, mainly marbles
112.8 115.8 LOST CORE
115.8 128.0 T ANDESITE FAULT ZONE 40cm gouge zone 5% pyrite
128.00 EOH *Groups: A=Asitka, B=Black Lake Intrusives, H=Hazelton(Toodoggone), L=Late Triassic Intrusives, SSustut, T=Takla 3 brenda Property 2004 ~iarnonv~rillLog Northgate Minerals Corp. BR-04-12 From (m) To (m) Group* Rock Type Comments 0.0 3.0 CASING
3.0 46.0 H HETEROLITHIC VOLCANIC Mixed fragments rubble of Hazelton volcanics and Black Lake intrusives, interpreted as overburden blocky till. Minor Takla AAP.
46.0 50.3 H FERRICRETE VOLCANIC Highly oxidised ferricrete composed of toodoggone volcanic fragments welded together by iron oxides.
50.3 51.8 LOST CORE
51.8 68.6 H FERRICRETEVOLCANIC
68.6 76.2 H ANDESITE FLOW Massive equigranular volcanics. Probable protolith to ferricrete zone above. Anhedral clots epidote to Icm in generally fine grained groundmass consisting of needly mafics (hornblende) to Imm, quartz and remnant feldspars mainly replaced by epidote. 2% disseminated fine grained pyrite throughout. Locally bleached greyish with weathered out vessicles. Moderately magnetic.
ANDESITE FAULT ZONE 30% gouge
ANDESITE FLOW
LOST CORE
ANDESlTE FLOW
MONZONITE INTRUSIVE More competent zone, feldspars to 3mm.
ANDESITE FLOW
MONZONITE INTRUSIVE
ANDESITE FLOW Local QSP alteration. Mafic minerals and primary textures largely obliterated
MONZONITE INTRUSIVE Strongly plag porphyritic, becoming less so with depth. Could be logged as Latite.
ANDESITE FLOW
225.60 EOH *Groups: A=Asitka, B=Black Lake Intrusives, H=Hazelton(Toodoggone), L=Lafe Triassic Intrusives, S=Susfuf, T=Takla u hrenda Property 2004 Diamond Drill Log Northgate Minerals Corp.
BR-04-12 From (m) To (m) Group* Rock Type Comments 169.2 173.8 B MONZONITE INTRUSIVE
173.8 208.0 H BASALTFLOW Mainly fine-grained intermediate to mafic volcanic with calcite filled arnygdules to 5mm. Moderate calcite veinslstringers to Icm thick.
208.0 225.6 B MONZONITE INTRUSIVE Up to 20% epidote
225.60 EOH *Croups:A=Asitka, B=Black Lake Znlrusives, H=Hazelton(Toodoggone), L=Lnte Triassic Zntrusives, SSustut, T=Takla i '4 3 Brenda Property 2004 Diamond Drill Log Northgate Minerals Corp.
BR-04-13 From (m) To (m) Group* Rock Type Comments 0.0 10.4 CASING
10.4 24.4 B FERRICRETE ALTERED ZONE Highly oxidised zone of probably Black Lake monzononite protolith. Heavily fractured, etched, and welded by iron oxides. FauL gouge common on multiple orientations. Local breccia textures = xenoliths?
24.4 35.1 H ANDESITE FLOW Massive fine grained unit, notably different than protolith of ferricrete zone above. All primary textures obliterated by intense quartz sericite pyrite (QSP) alteration. 35.1 42.7 B MONZONITE INTRUSIVE Anhedral plagioclase phenocrysts to 5mm and 25% in fine grained brown matrix. Mildly magnetic. Local epidote veining. Upper contact faulted. ANDESITE FLOW
MONZONITE INTRUSIVE Fresher looking monzonite, euhedral plagioclase to Icm.
ANDESITE FLOW Weaker sericite. silica1 still intense. Trace textures visible.
MONZONITE INTRUSIVE
ANDESITE FLOW
MONZONITE INTRUSIVE
LOST CORE
MONZONITE INTRUSIVE
ANDESITE FLOW Intensely silicified and locally vuggy
MONZONITE INTRUSIVE
ANDESITE FLOW
MONZONITE INTRUSIVE
287.40 EOH *Groups: A=Asitka, B=Black Lake Intrusives, H=Hazelton(Toodoggone),L=Late Triassic Intrusives, SSustut, T=Takla
Brenda Property 2 004 Diamond Drill Log Northeate COrp* 1 Hole Number:
From (m) To (m) Group* Rock Type Comments
0.0 4.5 CASING
4.5 18.3 B MONZONITE INTRUSIVE Feldspar Porphory, porphorytic clsts of epidote and chlorite.
18.3 27.4 B QUARTZ FELDSPAR PORPHYRY Lost Core. Tarnished pyrite. Lots of sericite. INTRUSIVE
27.4 30.6 B MONZONITE VOLCANIC BRECCIA Contact-QFP to MNZ Feldspar-rich porphyritic dyke.
30.6 34.0 H BASALT VOLCANIC BRECCIA Contact-MNZ to Basalt
34.0 34.7 H BASALT INTRUSIVE
34.7 54.9 B MONZONITE INTRUSIVE Lost core-porphorytic dyke.
54.9 66.5 T DACITE VOLCANIC BRECCIA Lost Core. Fine grained Dacite. Pyrite in groundmass.
66.5 71.6 T DACITE VOLCANIC Stockworking with gypsum veinlets.
71.6 102.5 B MONZONITE INTRUSIVE Porphorytic Dyke. Very strong propyllitic alteration.
102.5 145.3 T DACITE FLOW Fine to medium grainde dacite-pyrite in groundmass. Sharp contact.
145.3 164.4 T FELDSPAR PORPHYRY FLOW Lithology changes to feldspar porphory.
164.4 172.7 B MONZONITE INTRUSIVE Red porphorytic monzonite dyke heavily oxidized. Stockworking with CalciteIZeolite veins
172.7 202.0 T INTERMEDIATE FRAGMENTAL VOLCANIC K-alteration. Small fault infilled with sericite. PyriteIGy veins cross-cut by gypsum veins. BRECCIA
202.0 203.2 T INTERMEDIATE FRAGMENTAL
15-NOV-04 Page 1 of 4
*Groups: A=Asitka, B=Black Lake Intrusives, H=HazeIton(Toodoggone) L=Late Triassic Zntrusives, SSustut, PTakla Brenda Property 2004 Diamond Drill Log Northgate Minerals Corp.
Hole Number:
From (m) To (m) Group* Rock Type Comments
203.2 211.2 T DACITE FLOW
21 1.2 216.0 T INTERMEDIATE FRAGMENTAL VOLCANIC Silicic alteration over a possible propyllitic overprint (Chlorite+Epidote). Groundmass contains BRECCIA pyrite.
216.0 218.0 T INTERMEDIATE FRAGMENTAL FLOW Pyrite vein with a strong propyllitic alteration halo. Local zone with strong propyllitic alteration.
218.0 218.6 T INTERMEDIATE FRAGMENTAL VOLCANIC BRECCIA
218.6 220.6 T ANDESITE VOLCANIC BRECCIA Andestie with porphorytic andesite phenocrysts. Local zone about 1.5m in length of calcite veins of various orientations, some contain pyrite.
220.6 222.0 T INTERMEDIATE FRAGMENTAL VOLCANIC Pyrite occurs in clasts. BRECCIA
222.0 225.2 T INTERMEDIATE FRAGMENTAL FLOW 60%py, 40% calcite (vein). Pyrite occurring in clasts of chlorite.
225.2 238.8 T DACITE FLOW Small amount of pyrite in Epidote vein.
238.8 240.0 T ANDESITE VOLCANIC BRECCIA Fault with light green colored sericite-chlorite. 60cm. Heavy sericite alteration.
240.0 246.9 T DACITE FLOW Chlorite clasts with pyrite.
246.9 248.4 B GRANITE INTRUSIVE Section of Medium to coarse grained intrusive containing pyrite.
248.4 252.0 T DACITE FLOW 3 pyrite veins
252.0 253.8 B MONZONITE INTRUSIVE Porphorytic dyke-more intense veining-nomineralization.
253.8 254.3 T DACITE FLOW 50cm section of Dacite-containing pyrite vein.
15-NOV-04 Page 2 of 4 'Groups: A=Asitka, B=Black Lake I~rtrusives,H=Hazeltort(Toodoggone), L=Late Triassic Intrusives, SSusruul, T=Takla Brenda Property 2004 Diamond Drill Log p.~ortheate~inerals~orp- Hole Number:
From (m) To (m) Group* Rock Type Comments
254.3 264.0 B MONZONITE INTRUSIVE Same as at 253.8m.
264.0 268.4 T DACITE FLOW , Several small pyrite veins
268.4 274.0 B MONZONITE INTRUSIVE Graded contact with dacite. IOcm chunk of dacite-some mineralization in contact.
274.0 280.9 T DACITE FLOW 20cm section of dyke. Zone of intense sericitic alteration at contact with dyke.
280.9 282.9 B MONZONITE INTRUSIVE Mags low for porphorytic dyke.
282.9 306.7 T DACITE FLOW Specs of Chalcopyrite.
306.7 312.0 T DACITE VOLCANIC BRECCIA Pyrite occurring in clasts with chlorite.
312.0 321.3 T DACITE FLOW Pyrite in veins. Some larger clasts in dacite. Large calcite veins contain some pyrite.
321.3 325.4 T INTERMEDIATE FRAGMENTAL VOLCANIC Pyrite in clasts BRECCIA
325.4 343.1 6 MONZONITE INTRUSIVE Porphorytic dyke-gradational contact.
343.1 369.5 T DACITE FLOW Mottled texture-chlorite clasts-contain some pyrite.
369.5 372.0 T BASALT FLOW High primary magnetite-sharp contact
372.0 414.0 T DACITE VOLCANIC BRECCIA
414.0 418.4 B QUARTZ MONZONITE INTRUSIVE Heavily silicified zone. Quartz vein rich in CPY and Pyrite.
418.4 424.0 T DACITE VOLCANIC BRECCIA More Moly. Trace of Cpy. In groundmass
Page 3 of 4
*Groups: A=Asitka, B=Black Lake Intrusives, H=Hazelton(Toodoggone), L=Late TTricsic Intrusives, S=ustut, T=Takla Brenda Property 2004 Diamond Drill Log Northgate Minerals Corp. -7 Hole Number:
From (m) To (m) Group* Rock Type Comments
424.0 428.0 T DACITE FLOW Trace of Cpy. In groundmass
428.0 430.0 T ANDESITE FLOW Potassic alteration zone zeolite, epidote, and calcite veins.
430.0 432.0 T ANDESITE VOLCANIC BRECCIA Zone with high Mag S at Pyrite vein.
432.0 442.0 T BASALT VOLCANIC BRECCIA 2 magnetite crystals. Zone with high primary magnetitelchlorite.
442.0 448.0 T BASALTFLOW Cpy. In Quartz veins-several small ones, one larger one. Moly present again.
448.0 451.1 B MONZONITEINTRUSIVE Porphorytic dyke.
15-Nov-04 Page 4 of 4
*Groups:A=Asitka, B=Black Lake Intrusives, H=HazeIton(Toodoggone),L=Late Triassic Intrusives, SSustut, PTakla
:-\ srenda Property 2004 IIiarnoAd~rillLog Northgate Minerals Corp.a
From To RockType Py-Cpy-Mt Ms Veins (Otca-%) Comments
0 7.6 CASING 0.00 7.60 7.6 13.7 GROUND FERRICRETE FAULT ZONE 7.60 10.70 Fine grained light orange green Gouge, ferricrete, likely generated from underlying intensely oxidized andesites. Completely altered to iron oxides and clay. 10.70 12.20 12.20 13.70 13.7 24.4 VUGGY ANDESITE FLOW 13.70 15.20 Fine grained light green orange Sandy-textured volcanic with minor chlorite on moderately oxidized fractures. Etched veins, dissolved sulphides? 15.20 16.80 As above with 10% phyllic altered marbles of same primary lithology. 16.80 18.30 Fine grained light green orange End of pervasive oxidization. Chloritic fractures, mild moderately propyllitic pervasive chlorite still local limonite in etched areas. 18.30 19.80 19.80 21.30 21.30 22.90 Fine grained light grey orange Strong sericite clay pyrite alteration. Rare chlorite and intensely phyllic limonite on fractures. 22.90 24.40 24.4 25.9 LOST CORE 24.40 25.90 25.9 27.4 VUGGY ANDESITE FLOW 25.90 27.40 Fine grained light grey orange One 10cm piece of feldspar porphyry dyke, strongly 210038 0.010 0.025 intensely phyllic phyllic altered. 27.4 29 LOSTCORE 27.40 29.00 29 82.8 MASSIVE MONZONITE DYKE 29.00 30.50 Fine to medium grained light grey Massive monzonite, locally augite porphyritic to 3mm, 210039 0.012 0.080 green strongly propyllitic local clots epidote to 3mm. krenda Property 2004 Diamo rill Log Northgate Minerals Corp.3
From To RockType Py-Cpy-Mt Ms Veins ("tca-YO) Comments Sample# Cu Au ./o ppm 30.50 32.00 Fine to medium grained light grey green strongly propyllitic 32.00 33.50 33.50 35.10 35.10 36.60 Fine to medium grained green grey strongly propyllitic 36.60 38.10 2.0 0.0 0 1 38.10 39.60 2.0 0.0 0 1 EV 45 1 to 8% augite phenocrysts, anhedral, partially resorbed to 5mm. Reduce to NQ at 39.6m 41 .OO Fine to medium grained green brown 2.0 0.0 0 I Epidote clots to Icm intensely propyllitic 43.00 Fine to coarse grained green brown 2.0 0.0 0 5 Beginning to look porphyritic, anhedral felspars to 4mm, intensely propyllitic tabular mafics to 3mm, all in fg green brown 45.00 2.0 0.0 0 4 47.00 2.0 0.0 0 13 49.00 2.0 0.0 0 13 51 .OO 2.0 0.0 0 12 Feldspars weathered white on cut surface 53.00 1.0 0.0 0 5 55.00 1.0 0.0 0 5 57.00 1.0 0.0 0 9 59.00 1.0 0.0 0 5 61 .OO 1.0 0.0 0 10 63.00 Fine to medium grained green brown 1.0 0.0 0 6 Looses porphyritic texture, looks more like volcanic, intensely propyllitic but same lithology, mineralogy 65.00 1.0 0.0 0 0 67.00 1.0 0.0 0 2 69.00 1.0 0.0 0 0 71 .OO 1.0 0.0 0 9 73.00 1.00.0 0 2 0 'denda Property 2004 Diarnona &rill Log Northgate Minerals Corp.
From To RockType Py-Cpy-Mt Ms Veins ("tca-%) Comments Sample# Cu Au % ppm 73.00 75.00 Fine to medium grained green brown 1.0 0.0 0 0 CALVL 45 5 210064 0.002 0.000 intensely propyllitic 75.00 77.00 1.0 0.0 0 0 77.00 79.00 1.0 0.0 0 6 79.00 81.00 1.0 0.0 0 3 81.00 82.80 1.0 0.0 0 7 LC 1.0m 82.8 84 AMYGDULAR MAFlC DYKE 82.80 84.00 Fine grained dark green intensely 0.0 0.0 10 60 Salt and Pepper texture fine grained mafics. Calcite propyllitic filled arnydules to 6mm. 84 94.5 MASSIVE MONZONITE FAULT ZONE 84.00 85.30 Fine to medium grained green brown 1.0 0.0 0 2 intensely propyllitic 85.30 88.40 1.0 0.0 0 2 88.40 91.40 1.0 0.0 0 0 91.40 94.50 1.0 0.0 0 0 94.5 103.6 STOCKWORKED ANDESlTlC AUGITE PORPHYRY FAULT ZONE 94.50 97.50 Fine grained light green intensely 3.0 0.0 0 0 Mottled light green grock, all primary textures phyllic obliterated, replaced by quartz sericite. Rare augite ghosts replaced by sericite. Fg disseminated pyrite concentrated near chloritelgypsum veinlets. Gypsum +/-calcite stockworking to 20%. 97.50 100.60 3.0 0.0 0 0 100.60 103.60 3.0 0.0 0 0 GYPCA50 103.6 293.8 STOCKWORKED ANDESlTlC AUGITE PORPHYRY FLOW 103.60 105.00 Fine grained light green intensely 3.0 0.0 0 0 phyllic 105.00 107.00 3.0 0.0 0 0 107.00 109.00 3.0 0.0 0 0 109.00 1I1 .OO 3.0 0.0 0 0 112.00 113.00 3.0 0.0 0 0 - brenda Property 2004 Diarnon~~rillLog Northgate Minerals Corp.
BR-04-10 From To RockType Py-Cpy-Mt Ms Veins ("tca-%) Comments Sample# Cu Au % ppm 115.00 Fine grained light green intensely 210083 0.033 1.060 phyllic 117.00 3.0 0.0 0 0 GYPCA25 119.00 3.0 0.0 0 0 121.00 3.0 0.0 0 0 123.00 3.0 0.0 0 0 125.00 3.0 0.0 0 0 127.00 3.0 0.0 0 0 129.00 3.0 0.0 0 0 131.OO 5.0 0.0 0 0 133.00 3.0 0.0 0 0 135.00 3.0 0.0 0 0 137.00 3.0 0.0 0 0 SHR 30 5 Chlorite and gypsum in shear zone 139.00 3.0 0.0 0 0 141.OO 3.0 0.0 0 0 143.00 3.0 0.0 0 0 Local sericite after felspar porphyritic texture 145.00 5.0 0.0 0 0 SHR 20 10 Chlorite, gypsum and clots pyrite to 2cm in shear zone 147.00 3.0 0.0 0 0 149.00 3.0 0.0 0 0 Local sericite after felspar porphyritic texture 151.OO 3.0 0.0 0 0 153.00 2.0 0.0 0 0 GYPV 35 50 Vein breccia fragments of andesite in gypsum +/- sericte vein 3.0 0.0 0 0 Silica content increases slightly. 8.0 0.0 0 0 4.0 0.0 0 0 GYPV 35 5.0 0.0 0 0 5.0 0.0 0 0 5.0 0.0 0 0 o -~mcr~)a~cmma-~mcrroa ~-rno,-~m-=?~n 3 : zzz::z:: 22?$!2!22$!2$! Z $ZZZZ$ZZ $Z?$ZZZZ ZZZ$ZZZ? N NNNNNNNN NNNNNNNN NNNNNWNN (I) 3 brenda Property 2004 ~iarnodf~rillLog Northgate Minerals Corp.
From To RockType Py-Cpy-Mt Ms Veins ("tca-%) Comments Sample# Cu Au % ppm 215.00 217.00 Fine grained light green intensely 1 Trace Sphalerite, MS slightly elevated over mineralized 210136 0.017 0.361 phyllic veins (to 2.0) 217.00 219.00 5.0 0.0 0 0 219.00 221 .OO 5.0 0.1 0 0 Anhydrite begins to replace gypsum until 250m. 221 .OO 223.00 5.0 0.0 0 0 AHPW30 10 223.00 225.00 5.0 0.0 0 0 225.00 227.00 5.0 0.1 0 0 Trace Sphalerite 227.00 229.00 5.0 0.1 0 0 229.00 231 .OO 5.0 0.1 0 0 231 .OO 233.00 5.0 0.0 0 0 233.00 235.00 5.0 0.0 0 0 235.00 237.00 5.0 0.0 0 0 SHR 40 5 Chlorite and gypsum in shear zone 237.00 239.00 5.0 0.0 0 0 SHR 40 5 239.00 241 .OO Fine grained light green strongly 5.0 0.0 0 0 Anhedral augite to Imm become visible phyllic 241.00 243.00 5.0 0.0 0 0 MS to 30 243.00 245.00 5.0 0.0 0 0 245.00 247.00 5.0 0.0 0 0 247.00 249.00 5.0 0.0 0 0 249.00 251.00 Fine grained light green moderately 5.0 0.0 0 0 Local spotty epidote to 260m phyllic 251 .OO 253.00 5.0 0.0 0 0 253.00 255.00 8.0 0.0 0 0 255.00 257.00 5.0 0.0 0 0 257.00 259.00 5.0 0.0 0 0 GYPV 30 10 259.00 261.00 Fine grained light green strongly 5.0 0.0 0 0 phyllic 261 .OO 263.00 263.00 265.00 d krenda Property 2004 ~iarnorkT!DrillLog Northgate Minerals Corp.
From To RockType Py-Cpy-Mt Ms Veins ("tca-YO)Comments
265.00 267.00 Fine grained light green strongly phyllic 267.00 269.00 5.0 0.0 0 0 Strongly silicified zone, breccia textures 269.00 271.00 5.0 0.0 0 0 271 .OO 273.00 5.0 0.0 0 0 273.00 275.00 5.0 0.0 0 0 PW 35 5 275.00 277.00 5.0 0.0 0 0 277.00 279.00 5.0 0.1 0 0 PYCPY50 1 279.00 281 .OO Fine grained light green moderately 5.0 0.0 0 0 phyllic 281 .OO 283.00 3.0 0.0 0 0 SHR 50 5 283.00 285.00 3.0 0.0 0 0 285.00 287.00 3.0 0.0 0 0 287.00 289.00 5.0 0.0 0 0 289.00 291 .OO 5.0 0.0 0 0 291 .OO 292.60 5.0 0.0 0 0 292.60 293.80 8.0 0.0 0 0 PYSTRSO 5 293.8 309.1 PORPHYRITIC LATITE DYKE 293.80 295.00 Fine to coarse grained brown 2.0 0.0 2 2 CON 50 40% euhedral plagioclase phenocrysts to 5mm, mostly strongly propyllitii replaced by epidote. Rare anhedral augite to Zmm, 10%. Chill margins 50 crn of silicification, bleaching, stong pyrite veining. 2.0 0.0 2 2 2.0 0.0 2 2 2.0 0.0 2 2 2.0 0.0 2 2 2.0 0.0 2 2 2.0 0.0 2 2 2.0 0.0 2 2 Lower contact more diffuse i 9 hrenda Property 2004 ~iamon'b~rillLog Northgate Minerals Corp.
From To RockType Py-Cpy-Mt Ms Veins ("tca-YO) Comments
309.1 344.6 STOCKWORKED ANDESlTlC AUGITE PORPHYRY FLOW 309.10 31 1.OO Fine grained light green moderately 5.0 0.0 0 0 FLT 45 phyllic 31 1.OO 31 3.00 5.0 0.0 0 0 313.00 315.00 5.0 0.0 0 0 31 5.00 31 7.00 5.0 0.0 0 0 317.00 319.00 5.0 0.0 0 0 319.00 321.OO 5.0 0.0 0 0 Local Sandy textures, augotes no longer visible. 321.OO 323.00 5.0 0.0 0 0 323.00 325.00 5.0 0.1 0 0 325.00 327.00 5.0 0.0 0 0 AHV 50 327.00 329.00 5.0 0.0 0 0 329.00 331 .OO 8.0 0.1 0 0 AHPW35 331.OO 333.00 5.0 0.0 0 0 333.00 335.00 5.0 0.0 0 0 335.00 337.00 5.0 0.1 0 0 337.00 339.00 5.0 0.0 0 0 339.00 341 .OO 5.0 0.0 0 0 341.OO 343.00 5.0 0.0 0 0 343.00 344.60 5.0 0.0 0 0 344.6 353.6 PORPHYRITIC LATITE DYKE 344.60 346.00 Fine to coarse grained brown Dyke wisps in and out. 60% latite, 20% andesite strongly propyllitic 346.00 348.50 1OO& latite as 293.8 to 309.1 348.50 351 .OO Porphyry texture diminished, plagioclase to 3mrn. 351.00 353.60 End Of Hole. Local quartz vein breccia textures. w brenda Property 2004 Diamona Drill Log Northgate Minerals Corp.9
From To RockType Py-Cpy-Mt Ms Veins (Otca-%) Comments
0 21.3 CASING 0.00 21.30 21.3 31.8 PORPHYRITIC LATITE FAULT ZONE 21.30 31.80 Fine to coarse grained light green 0.1 0.0 5 0 Rubbly zone, Very poor recovery. Anhedral plagioclase moderately propyllitic phenocrysts to Icm to 70% in very fine grained light green matrix with trace epidote on fractures. Plag grains look resorbed. Also minor (5%) basalt with fine feldspar laths to 3mm, may represent host rock to latite dyke. Trace Augite porphyritic volcanics, in small pieces. Reddish brown fault gouge to 20%, shallow core angles to gouge zones where visible. 31.8 47 MASSIVE BASALT FAULT ZONE 31.80 47.00 Fine grained black weakly silicified 0.0 0.0 2 45 Rubbly zone continues. Interval dominated (80%) by (non-K) massive basalt, locally flow brecciated, rarely augite phyric. 10% latite pieces as above. 10% fault gouge. 47 56.8 PORPHYRITIC MONZONITE FAULT ZONE 47.00 56.80 Fine to coarse grained light green 0.1 0.0 2 0 Rubble dominated (60%) by pieces of mildly feldspar brown moderately propyllitic porphyritic intrusive. Euhedral feldspars to 4mm 40%. bladed mafics horneblende +I- biotite to 2mm. Locally more feldspar porphyritic (to 6mm). 30% propyllitic 56.8 59.4 LOST CORE FAULT ZONE 56.80 59.40 59.4 62.5 MASSIVE BASALT FAULT ZONE 59.40 62.50 Fine grained black weakly silicified 0.0 0.0 2 1 (non-K) 62.5 65.5 LOST CORE FAULT ZONE 62.50 65.50 65.5 75.590 STOCKWORKED BASALT FAULT ZONE 4 65.50 71.60 Fine grained black weakly silicified 1.0 0.0 8 35 CALV 45 10 Variably massive and flow brecciated basalt. Strongly (non-K) magnetic, with moderated calcite veining1 stringer stockworking. Cdrenda Property 2004 ~iamo~~rillLog Northgate Minerals Corp.3
From To RockType Py-Cpy-Mt Ms Veins ('tca-%) Comments Sample# Cu Au % ppm 71.60 72.50 Fine grained black weakly silicified 1.0 0.0 8 40 210001 0.006 0.000 (non-K) 72.50 73.10 1.0 0.0 8 50 73.10 74.50 1.0 0.0 8 24 74.50 75.59 1.0 0.0 8 27 75.5904 112.8 STOCKWORKED ANDESITE FAULT ZONE 75.59 78.64 Fine grained dark grey weakly 1.0 0.0 1 30 Sandy textured massive andesite flows with minor 210005 0.009 silicified (non-K) calcite veining/stockworking. Small zones of core, mainly marbles 210006 0.009 210007 0.008 210008 0.006 210009 0.006 As above but completely milled to marbels. Local 210010 0.006 coarse grained cobby pyrite. Trace chlorite. 89.92 210011 0.002 91.44 210012 0.001 92.66 210013 0.003 94.18 210014 0.003 97.54 210015 0.003 99.06 210016 0.002 100.28 210017 0.007 102.50 Fine grained dark grey strongly Clots epidote to 5mm and 15% appear. Moderate 210018 0.009 propyllitic chlorite on fracture faces. 103.60 210019 0.006 106.70 210020 0.008 109.70 Fine grained dark grey moderately 210021 0.003 propyllitic 112.80 m eu~rc N NNN 0 000 0 000 F; &SK
N NNN
TI- 0 l- 3 0 g 9 $ f N w :: k E rn w w zn b, u $ n 'P
=y$Ol-0 y=+&000 7 7 NNN 7W Y '7- .- .. - - . - - - 2; Kir;F4ss2;2;2;3: ZZZZZZZZZ? NNNNNNNNNN
u .-E Eu ma, mua, .N % ..E 8: g 22 a, a,~8 iig ",C $0 ZJ00 dm e brenda Property 2004 Diamo rill Log Northgate Minerals Corp.
From To RockType Py-Cpy-Mt Ms Veins (Otca-%) Comments Sample# Cu Au % ppm 68.60 70.10 Fine to coarse grained grey brown 2.0 0.0 2 Massive equigranular volcanics. Probable protolith to 210222 0.024 0.975 strongly propyllitic ferricrete zone above. Anhedral clots epidote to lcm in generally fine grained groundmass consisting of needly mafics (hornblende) to Irnm, quartz and remnant feldspars mainly replaced by epidote. 2% disseminated fine grained pyrite throughout. Locally bleached greyish with weathered out vessicles. Moderately magnetic. 70.10 71.60 71.60 73.20 73.20 74.70 74.70 76.20 76.2 77.7 GROUND ANDESITE FAULT ZONE 76.20 77.70 Fine to coarse grained light grey 2.0 0.0 2 FLT 40 60 30% gouge strongly propyllitic 77.7 91.4 MASSIVE ANDESITE FLOW 77.70 79.20 Fine to coarse grained grey brown strongly propyllitic 79.20 80.80 2.0 0.0 2 80.80 82.30 2.0 0.0 2 82.30 83.80 2.0 0.0 2 FLT 70 20 83.80 85.30 2.0 0.0 2 85.30 86.90 2.0 0.0 2 86.90 88.40 2.0 0.0 2 88.40 89.90 2.0 0.0 2 89.90 91.40 2.0 0.0 2 91.4 93 LOST CORE 91.40 93.00 93 103.6 MASSIVE ANDESITE FLOW 93.00 94.50 Fine to coarse grained grey brown strongly propyllitic \ 9 Brenda Property 2004 ~iarnondDril1Log Northgate Minerals Corp.
From To RockType Py-Cpy-Mt Ms Veins ("tca-%) Comments
94.50 96.00 Fine to coarse grained grey brown 2.0 0.0 2 strongly propyllitic 96.00 97.50 2.0 0.0 2 97.50 99.10 2.0 0.0 2 99.10 100.60 2.0 0.0 2 100.60 102.10 2.0 0.0 2 102.10 103.60 2.0 0.0 2 103.6 109.7 PORPHYRITIC MONZONITE INTRUSIVE 103.60 105.20 Fine to coarse grained brown 2.0 0.0 2 More competent zone, feldspars to 3mm. moderately propyllitic 105.20 106.70 2.0 0.0 2 106.70 108.20 2.0 0.0 2 108.20 109.70 2.0 0.0 2 109.7 128 MASSIVE ANDESITE FLOW 109.70 111.30 Fine to coarse grained grey brown 2.0 0.0 2 moderately propyilitic 111.30 112.80 2.0 0.0 2 112.80 114.30 2.0 0.0 2 114.30 115.80 2.0 0.0 2 115.80 117.30 2.0 0.0 2 117.30 118.90 2.0 0.0 2 118.90 120.40 2.0 0.0 2 120.40 121.90 2.0 0.0 2 121.90 123.40 2.0 0.0 2 123.40 125.00 2.0 0.0 2 FLT 125.00 126.50 2.0 0.0 2 126.50 128.00 2.0 0.0 2 128 132.6 PORPHYRITIC MONZONITE INTRUSIVE 9 Brenda Property 2004 ~iamond~rillLog Northgate Minerals Corp.
From To RockType Py-Cpy-Mt Ms Veins ("tca-%) Comments Sample# Cu Au % ppm 128.00 129.50 Fine to coarse grained brown 2.0 0.0 2 moderately propyllitic 129.50 131.10 2.0 0.0 2 131.10 132.60 2.0 0.0 2 132.6 144.8 MASSIVE ANDESITE FLOW 132.60 134.10 Fine to coarse grained light grey 2.0 0.0 2 Local QSP alteration. Mafic minerals and primary 210265 0.133 0.724 moderately phyllic textures largely obliterated 134.10 135.60 Fine to coarse grained grey brown 2.0 0.0 2 210266 0.205 0.893 strongly propyllitic 135.60 137.20 2.0 0.0 2 137.20 138.70 2.0 0.0 2 138.70 140.20 2.0 0.0 2 140.20 141.70 2.0 0.0 2 141.70 143.30 2.0 0.0 2 143.30 144.80 2.0 0.0 2 144.8 155.4 PORPHYRITIC MONZONITE INTRUSIVE 144.80 146.30 Fine to coarse grained brown 2.0 0.0 2 Strongly plag porphyritic, becoming less so with depth. 210273 0.003 0.000 strongly propyllitic Could be logged as Latiie. 146.30 147.80 2.0 0.0 2 210274 0.000 0.000 147.80 149.40 2.0 0.0 2 210275 0.005 0.000 149.40 150.90 2.0 0.0 2 210276 0.062 0.330 150.90 152.40 2.0 0.0 2 210277 0.001 0.000 152.40 153.90 2.0 0.0 2 210278 0.001 0.000 153.90 155.40 2.0 0.0 2 210279 0.037 0.162 155.4 169.2 MASSIVE ANDESITE FLOW 155.40 157.00 Fine to coarse grained grey brown 2.0 0.0 2 strongly propyllitic 157.00 158.50 2.0 0.0 2 158.50 160.00 2.0 0.0 2 3 \Brenda Property 2004 ~iarnon'8~rillLog Northgate Minerals Corp.
From To RockType Py-Cpy-Mt Ms Veins ("tca-%) Comments Sample# Cu Au % ppm 160.00 161.50 Fine to coarse grained grey brown 210283 0.037 0.104 strongly propyllitic 161.50 163.10 163.10 164.60 164.60 166.10 166.10 167.60 167.60 169.20 169.2 173.8 PORPHYRITIC MONZONITE INTRUSIVE 169.20 170.70 Fine to coarse grained brown strongly propyllitic 170.70 172.20 2.0 0.0 2 172.20 173.80 2.0 0.0 2 CON 35 173.8 208 AMYGDULAR BASALT FLOW 173.80 175.30 Fine to medium grained black 0.0 0.0 5 CALST 35 5 Mainly finegrained intermediate to mafic volcanic with moderately propyllitic calcite filled amygdules to 5mm. Moderate calcite veinststringers to Icm thick. 175.30 176.80 0.0 0.0 5 176.80 178.30 0.0 0.0 5 178.30 179.80 0.0 0.0 5 CALV 25 10 179.80 180.40 0.0 0.0 5 Reduce HQ-NQ at 180.4 180.40 182.00 0.0 0.0 5 182.00 184.00 0.0 0.0 5 184.00 186.00 0.0 0.0 5 186.00 188.00 0.0 0.0 5 188.00 190.00 0.0 0.0 5 190.00 192.00 Fine to medium grained dark green 0.0 0.0 5 black moderately propyllitic 192.00 194.00 0.0 0.0 5 CALV 5 10 Local vuggy calcite veins 194.00 196.00 0.0 0.0 5 (3 brenda Property 2004 ~iarnord?brillLog Northgate Minerals Corp.
BR-04-12 From To RockType Py-Cpy-Mt Ms Veins ('tca-%) Comments
196.00 198.10 Fine to medium grained dark green Very low recovery zone to 20h,resulting in long black moderately propyllitic samples. 198.10 201.20 201.20 206.40 206.40 208.00 208 225.6 MASSIVE MONZONITE INTRUSIVE 208.00 210.00 Fine to medium grained green brown Up to 20% epidote strongly propyllitic 210.00 212.00 2.0 0.0 2 212.00 214.00 2.0 0.0 2 214.00 216.00 2.0 0.0 2 216.00 218.00 2.0 0.0 2 21 8.00 220.00 2.0 0.0 2 WLT 45 15 220.00 222.00 2.0 0.0 2 222.00 224.00 2.0 0.0 2 224.00 225.60 2.0 0.0 2 End of Hole. 3 'brenda Property 2004 ~iamoi&rill Log Northpate Minerals Corp.
BR-04-13
From To RockType Py-Cpy-Mt Ms Veins ("tca-%) Comments Sample# Cu Au % ppm 0 10.4 CASING 0.00 10.40 10.4 24.4 PORPHYRITIC FERRICRETE ALTERED ZONE 10.40 11.70 Fine to coarse grained orange 0.0 0.0 0 0 Highly oxidised zone of probably Black Lake intensely oxidized monzononite protolith. Heavily fractured, etched, and welded by iron oxides. Fault gouge common on multiple orientations. Local breccia textures =xenoliths? 11.70 12.80 12.80 14.00 14.00 15.10 15.10 16.80 16.80 18.30 18.30 19.80 19.80 21.30 21.30 22.90 22.90 24.40 24.4 35.1 MASSIVE ANDESITE FLOW 24.40 25.90 Fine grained light grey intensely Massive fine grained unit, notably different than phyllic protolith of ferricrete zone above. All primary textures obliterated by intense quartz sericite pyrite (QSP) 25.90 27.40 3.0 0.0 0 0 27.40 29.00 3.0 0.0 0 0 29.00 30.50 3.0 0.0 0 0 30.50 32.00 3.0 0.0 0 0 32.00 33.50 3.0 0.0 0 0 30cm gouge zone, no fault orientation visible 33.50 35.10 3.0 0.0 0 0 35.1 42.7 PORPHYRITIC MONZONITE INTRUSIVE 13 brenda Property 2004 ~iarnon;TbrillLog Northgate Minerals Corp.
From TO RockType Py-Cpy-Mt Ms Veins ("tca-%) Comments
35.1 0 36.60 Fine to coarse grained brown 0.0 0.0 1 2 EV 45 1 Anhedral plagioclase phenocrysts to 5mm and 25% in moderately propyllitic fine grained brown matrix. Mildly magnetic. Local epidote veining. Upper contact faulted. 36.60 38.10 0.0 0.0 1 4 38.10 39.60 0.0 0.0 1 4 Reduce HQ-NQ at 39.6 39.60 42.70 0.0 0.0 1 2 42.7 64 MASSIVE ANDESITE FLOW 42.70 45.70 Fine grained light grey intensely 3.0 0.0 0 phyllic 45.70 48.80 3.0 0.0 0 Return to HQ at 48.8 48.80 50.30 3.0 0.0 0 50.30 51.80 3.0 0.0 0 51.80 53.30 3.0 0.0 0 FLT 50 25 20% fault gouge 53.30 54.90 3.0 0.0 0 54.90 56.40 3.0 0.0 0 56.40 57.90 3.0 0.0 0 57.90 59.40 3.0 0.0 0 59.40 61.00 3.0 0.0 0 61.00 62.50 3.0 0.0 0 62.50 64.00 3.0 0.0 0 64 79.2 PORPHYRITIC MONZONITE INTRUSIVE 64.00 65.50 Fine to coarse grained brown weakly 0.0 0.0 3 Fresher looking monzonite, euhedral plagioclase to Icm. propyllitic 65.50 67.10 0.0 0.0 3 67.10 68.60 0.0 0.0 3 68.60 70.10 0.0 0.0 3 70.10 72.00 0.0 0.0 3 Reduce HQ-NQ at 70.7 72.00 74.00 0.0 0.0 3 o m 0 0 ;; 8::$X$% z !:MZZ ;j g gg 2 2 2 2 2 9979 2= 2 22 0000 2
r m ~n ~nocowmm m ~UJNW o m WN o o N u~emcu~mo oooo e w o oo 5s 9 2 2 999999000000 90 00009999 2 2 8 22
& m m o 000000 m mmmm o o m mm $ 999999 9999 8 8 8 88 S 8 8 Z oooaoo 8 0000 ssqsss s ssqq 0 0000 4 4 8 28 &2 x x 4 mmmmmm
.- 8% oz 9 .'-, h 0 E E u iih rnI- 0 000 q'4-1
F 2: - --m o -~m (D ~cmo~mvmwt-mmo m mmm 8 %- m mmm m m 4 :432%g%%%%%%g53 zslz 0 0000000~~~~~~~~ i NNN K K Z ZZZZZGKNNNNNNNN v,
m mmm 3 krenda Property 2004 ~iarnon'b~rillLog Northeate Minerals Corp.
BR-04-13 From To RockType Py-Cpy-Mt Ms Veins ("tca-YO) Comments Sample# Cu Au % ppm 163.00 165.00 Fine to coarse grained brown weakly propyllitic 165.00 167.00 167.00 169.00 169.00 170.50 170.50 172.00 172 175.1 MASSIVE ANDESITE FLOW 172.00 173.50 Fine grained light grey strongly phyllic 173.50 175.10 175.1 186.5 PORPHYRITIC MONZONITE INTRUSIVE 175.10 177.00 Fine to coarse grained brown weakly propyllitii 177.00 179.00 179.00 181.OO 181.OO 183.00 183.00 185.00 185.00 186.50 186.5 287.4 STOCKWORKED ANDESITE FLOW 186.50 187.60 Fine grained light grey intensely 0 0 GYPST30 10 Strongly altered and moderately mineralized zone with phyllic gypsum stockworking to 30% of volume, local crackle breccia texturestrare chalcopyrite and spotty sphalerite (both BlackJack and Honey varieties) as veins and disseminations. 0 0 0 0 0 0 0 0 0 0 FLT 70 5 0 0 3 brenda Property 2004 Diamond Drill Log Northgate Minerals Corp.
From To RockType Py-Cpy-Mt Ms Veins ("tca-%) Comments
199.00 201 .OO Fine grained light grey intensely phyllic 201.00 203.00 0 0 SHR 10 20 210425 0.002 0.107 203.00 205.00 0 0 210426 0.015 0.067 205.00 207.00 0 0 210427 0.018 0.364 207.00 209.00 0 0 220428 0.012 0.095 209.00 21 1.OO 0 0 SPHVL 30 0.1 210429 0.011 0.122 21 1.OO 21 3.00 0 0 210430 0.005 0.128 213.00 215.00 0 0 210431 0.032 0.083 215.00 217.00 0 0 210432 0.024 0.197 217.00 219.00 0 0 210433 0.008 0.394 219.00 221.OO 0 0 210434 0.001 0.108 221 .OO 223.00 0 0 210435 0.005 0.077 223.00 225.00 0 0 210436 0.003 0.075 225.00 227.00 0 0 210437 0.020 0.071 227.00 229.00 0 0 210438 0.013 0.178 229.00 231 .OO 0 0 210439 0.005 0.248 231 .OO 233.00 0 0 Gypsum stockworking gives way to Anhydrite and 210440 0.008 0.128 233.00 235.00 0 0 210442 0.011 0.123 235.00 237.00 0 0 210443 0.013 0.100 237.00 239.00 0 0 210444 0.009 0.108 239.00 241 .OO 0 0 210445 0.023 0.092 241 .OO 243.00 0 0 210446 0.037 0.079 243.00 245.00 0 0 210447 0.014 0.052 245.00 247.00 0 0 QAHV 5 10 210448 0.014 0.072 247.00 249.00 0 0 SPHCP40 1 210449 0.017 0.073 249.00 251 .OO 0 0 210450 0.015 0.099 d Brenda Property 2004 ~iamonarillLog North~ateMinerals Corp.
From To RockType Py-Cpy-Mt Ms Veins ('tca-%) Comments
251 .OO 253.00 Fine grained light grey intensely phyllic 253.00 255.00 Fine to medium grained grey 3.0 0.0 0 0 FLT 70 15 Fault contact between stockworked and mottled units. strongly phyllic 255.00 257.00 257.00 259.00 259.00 261 .OO 261.00 263.00 Gypsum stockworking 263.00 265.00 265.00 267.00 267.00 269.00 very minor splashes of epidote 269.00 271 .OO 1 271 .OO 273.00 273.00 275.00 Massive unit containg large white veins (plag?) 275.00 277.00 277.00 279.00 9cm section taken for thin section 279.00 281 .OO trace amounts of cpy, also sphalerite veins assoc. with CPY 281 .OO 283.00 2 283.00 285.00 285.00 286.00 286.00 287.40 End of Hole. 287.4 EOH Brenda Property 2004 Diamond Drill Log Northgate Minerals Corp.
Hole Number: BR-04-14
From To RockType Py-Cpy-Mt Ms Veins ("tca-%) Comments sample# $: k," 4.5 1 CASING 0.00 4.50 1 4.5 111PORPHYRITIC MONZONITE INTRUSIVE 4.50 6.00 Fine to medium grained maroon 0.0 0.0 0.0 2 Feldspar Porphory, porphorytic clsts of epidote and strongly propyllitic chlorite. 6.00 8.00 0.0 0.0 0.0 6 sv 22 0.1 8.00 10.00 0.0 0.0 0.0 7 SV 41 0.1 10.00 12.00 0.0 0.0 0.0 0 DYK 77 0.1 Light green mafic dyke. Sericite veinlets. 12.00 12.80 0.0 0.0 0.0 I sv 78 1 12.80 14.00 Fine to medium grained green 0.0 0.0 0.0 0 sv 32 2 Epidote phenocrysts in a dark green groundmass strongly propyllitic 14.00 16.00 0.0 0.0 0.0 0 FLT 53 2 Fault infilled with sericite-clay. Epidote veins 16.00 18.30 Fine to medium grained green 0.0 0.0 0.0 0 Lost Core-Sampling block to block. intensely propyllitic 1183 111PORPHYRITIC QUARTZ FELDSPAR PORPHYRY INTRUSIVE 18.30 21.30 Fine to medium grained grey 2.0 0.0 0.0 0 Lost Core. Tarnished pyrite. Lots of sericite. intensely silicified (non-K) 21.30 24.40 Fine to medium grained green grey 1.0 0.0 0.0 1 Light colored pyrite (almost silver in color) intensely propyllitic 24.40 27.40 Fine to medium grained green grey 5.0 0.0 0.0 0 Lost core-very low recovery. strongly propyllitic 127.4Tj0.6 PORPHYRITIC MONZONITE VOLCANIC BRECCIA 27.40 30.60 Fine to medium grained maroon 0.0 0.0 0.0 6 EV 21 0.1 Contact-QFP to MNZ Feldspar-rich porphyritic dyke. intensely propyllitic /I 1/34 BRECCIATED BASALT VOLCANIC BRECCIA 30.60 32.00 Fine to medium grained dark grey 0.0 0.0 0.0 34 sv 15 2 Contact-MNZ to Basalt intensely phyllic 32.00 34.00 Fine to medium grained dark grey 0.0 0.0 0.0 45 CALV 24 2 Small section from porphyritic dyke strongly phyllic
15-Nov-04 Page 1 of 15 Brenda Property 2004 Diamond Drill Log Northgate Minerals Corp.
I Hole Number: BR-04-14 7
From To RockType Py-Cpy-Mt Ms Veins ("tca-%) Comments /I 1/ BRECCIATED BASALT INTRUSIVE 34.00 34.70 Fine to medium grained dark grey 0.0 0.0 0.0 29 zv 81 0.1 strongly phyllic )I )I 1x1 PORPHYRITIC MONZONITE INTRUSIVE 34.70 36.60 Fine to medium grained maroon 0.0 0.0 0.0 0 Lost core-porphorytic dyke. strongly propyllitic 36.60 38.00 0.0 0.0 0.0 I 38.00 40.00 Fine to medium grained maroon 0.1 0.0 0.0 I Lots of epidote-highly altered. intensely propyllitic 40.00 42.70 0.0 0.0 0.0 3 Lost core-sampling block to block.
45.70 48.80 0.1 0.0 0.0 0 48.80 51.80 0.0 0.0 0.0 0 FLT Faulted zone-Sericitelclay. 51.80 54.90 0.0 0.0 0.0 0 FLT as above 154.9111 BRECCIATED DAClTE VOLCANIC BRECCIA 54.90 57.90 Fine to medium grained grey strongly 3.0 0.0 0.0 0 Lost Core. Fine grained Dacite. Pyrite in groundmass. phyllic 57.90 61.00 1.0 0.0 0.0 0 FLT 50 Large fault-clay infilled. Lost Core. 61.00 66.50 3.0 0.0 0.0 0 FLT 30 Lost core. Large fault clay in the fault is rich in pyrite. 166.51171.6 STOCKWORKED DAClTE VOLCANIC 66.50 68.00 Fine to medium grained grey strongly 0.5 0.0 0.0 I GW 32 8 Stockworking with gypsum veinlets. phyllic 68.00 70.00 1.0 0.0 0.0 0 FLT 44 5 As above-Fault with pyrite-rich clasts. 70.00 71.60 0.5 0.0 0.0 0 FLT 76 10 Large fault-gypsum veinlets and stockworking. 171 -1 PORPHYRITIC MONZONITE INTRUSIVE 71.60 74.00 Fine to medium grained maroon 0.0 0.0 0.0 I Porphorytic Dyke. Very strong propyllitic alteration. intensely propyllitic 74.00 76.00 0.0 0.0 0.0 3 EV 38 5 Calcite present in fractures
15-Nov-04 Page 2 of 15 Brenda Property 2004 Diamond Drill Log Northgate Minerals Corp.
I Hole Number: BR-04-14
From To RockType Py-Cpy-Mt Ms Veins ("tca-%) Comments
76.00 78.00 Fine to medium grained maroon 0.0 0.0 0.0 9 CALV 29 0.1 intensely propyllitic 78.00 80.00 0.0 0.0 0.0 5 CALV 82 2 Large zones of epidote. 80.00 82.00 0.0 0.0 0.0 3 cv 52 0.1 82.00 84.00 0.0 0.0 0.0 3 More broken up-unable to determine structures. 84.00 86.00 Fine to medium grained maroon 0.0 0.0 0.0 2 CALV 49 0.1 Less intense alteration. Chlorite veins also present strongly propyllitic 52"rCA. 86.00 88.00 0.0 0.0 0.0 5 88.00 90.00 0.0 0.0 0.0 I
92.00 94.00 0.0 0.0 0.0 4 CALV 68 0.1 Calcite veinlets cross-cut other structures. 94.00 96.00 0.0 0.0 0.0 4 CALV 21 5 Several Calcite veinlets 96.00 98.00 0.1 0.0 0.0 8 CALV 37 3 Small amount of pyrite present in epidote-rich clast. 98.00 100.00 Fine to medium grained maroon 0.1 0.0 0.0 I CALV 32 2 Stronger prop. Altn. intensely propyllitic 100.00 102.50 Fine to medium grained green 0.1 0.0 0.0 0 CALV 19 8 Calcite veins with various orientations. intensely propyllitic / 10251 STOCKWORKED DACITE FLOW 102.50 104.00 Fine to medium grained grey 3.0 0.0 0.0 0 GW 39 15 Fine to medium grainde dacite-pyrite in groundmass intensely phyllic Sharp contact. 5.0 0.0 0.0 0 PW 71 1 2.0 0.0 0.0 0 GW 64 20 2.0 0.0 0.0 0 GW 62 8 Zone with local decrease in stockworking. 3.0 0.0 0.0 0 GW 60 5 112.00 114.00 Fine to medium grained grey strongly 5.0 0.0 0.0 0 PW 35 0.1 silicified (non-K) 1 14.00 116.00 3.0 0.0 0.0 0 GW 55 8 Pyrite bearing gypsum veins-10% of vein.
Page 3 of 15 Brenda Property 2004 Diamond Drill Log Northgate Minerals Corp.
I Hole Number: BR-04-14
From To RockType Py-Cpy-Mt Ms Veins ('tca-%) Comments
116.00 118.00 Fine to medium grained grey strongly 7.0 0.0 0.0 0 pw 5 1 Pyrite vein cross-cut by CallCarb? Vein. Quartz vein 210529 0.007 0.051 silicified (non-K) lined with pyrite. 7.0 0.0 0.0 0 PW 11 0.1 210530 0.013 0.073 7.0 0.0 0.0 0 pw 33 1 Quartzlanhydritelpyrite vein. CalICarb? Veins. 210531 0.015 0.161 7.0 0.0 0.0 0 QANV 90 1 Quartzlanhydritelpyrite vein cross-cut by by small 210532 0.010 0.097 pyritelcarbonate vein. 6.0 0.0 0.0 0 DYK 78 3 MNZ porphory dyke -6cm in length. 210533 0.021 0.208 126.00 128.00 5.0 0.0 0.0 0 QANV 57 1 Some pyrite in QuarWAnhydrite vein. 210534 0.011 0.089 3.0 0.0 0.0 0 CALV 46 3 Mottled texture-chlorite clasts. 6.0 0.0 0.0 0 pw 15 1 5.0 0.0 0.0 0 CALV 42 2 Large, soft carbonate vein. Possible fault? 5.0 0.0 0.0 0 FLT 37 2 Small fault-carbonate filled. 136.00 138.00 1.0 0.0 0.0 0 CALV 67 1 Decrease in Pyrite. 210539 0.026 0.148 138.00 140.00 Fine to medium grained grey strongly 1.0 0.0 0.0 0 sv 55 2 Sericite alteration. 210540 0.009 0.173 phyllic 140.00 142.00 Fine to medium grained grey strongly 5.0 0.0 0.0 0 sv 52 1 Increase in pyrite-occurs in mottled chlorite clasts. 210541 0.047 0.731 silicified (non-K) 142.00 144.00 6.0 0.0 0.0 0 Pw 5 0.1 3 pyrite veins with different orientations: 1@30*, 1@5*, 210542 0.026 0.524 and 1@47* 144.00 145.30 6.0 0.0 0.0 0 QV 43 1 210543 0.028 0.853 17 111 PORPHYRITIC FELDSPAR PORPHYRY FLOW 145.30 146.00 Fine to coarse grained light grey 5.0 0.0 0.0 0 CALV 70 2 Lithology changes to feldspar porphory. 210544 0.019 0.833 strongly silicified (non-K) 146.00 148.00 5.0 0.1 0.0 0 QGW 33 2 Small amount of cpy. In quarWGypsum vein. 210545 0.011 0.576 6.0 0.0 0.0 0 QGW 48 1 Slight decrease in pyrite. 210546 0.007 0.192 5.0 0.0 0.0 0 pw 29 1 Pyrite vein cross-cut by small sericite veins. 210547 0.011 0.316 10.0 0.0 0.0 0 GW 55 2 Large 4cm gypsum vein. Other gypsum veins containing 210548 0.008 0.598 pyrite. Pyrite veins cross cut by gypsum/calcite vein. Brenda Property 2004 Diamond Drill Log Northgate Minerals Corp.
I Hole Number: BR-04-14 From To RockType Py-Cpy-Mt Ms Veins ('tea-%) Comments
154.00 156.00 Fine to coarse grained light grey 10.0 0.0 0.0 0 GYPW 22 2 strongly silicified (non-K) 156.00 158.00 Fine to coarse grained light grey 2.0 0.0 0.0 0 GW 64 2 Moderate propylitic alteration. Sharp decrease in pyrite. moderately propyllitic 158.00 160.00 0.1 0.0 0.0 0 EV 51 0.1 160.00 162.00 Fine to coarse grained light grey 2.0 0.0 0.0 0 sv 53 5 Potassic alteration-moderate. Porphorytic k-spar clasts. moderately potassic - quartz-chlorite 162.00 164.40 5.0 0.0 0.0 0 PW 27 1 Pyrite vein cross cut by gypsum veins 11644 11172.7 PORPHYRITIC MONZONITE INTRUSIVE I- 164.40 166.00 Fine to coarse grained maroon red 0.0 0.0 0.0 8 CAYV 46 8 Red porphorytic monzonite dyke heavily oxidized. intensely oxidized Stockworking with CalcitelZeolite veins 166.00 168.00 0.0 0.0 0.0 8 CAW 78 10 As above 168.00 170.00 0.0 0.0 0.0 8 CALZV 58 10 170.00 172.00 0.0 0.0 0.0 10 CAUV 39 10 172.00 172.70 0.0 0.0 0.0 5 CALZV 71 10 1172.7 BRECCIATED INTERMEDIATE FRAGMENTAL VOLCANIC 172.70 174.00 Fine to coarse grained light grey 5.0 0.0 0.0 0 pw 22 1 K-alteration. Small fault infilled with sericite. PyriteIGy strongly potassic - chloritequartz veins cross-cut by gypsum veins. 174.00 176.00 3.0 0.0 0.0 0 CALV 53 2 176.00 178.00 Fine to coarse grained light grey 5.0 0.0 0.0 0 CALV 62 5 Calcite veins cross-cut a small pyrite vein. strongly silicified (non-K) 178.00 180.00 3.0 0.0 0.0 0 pw 56 0.1 2 Pyrite veins -0.5cm thick 1@55* TCA, 1@25*TCA 180.00 182.00 2.0 0.0 0.0 0 CALV 65 5 182.00 184.00 5.0 0.0 0.0 0 PW 18 0.1 184.00 186.00 2.0 0.0 0.0 0 CALV 58 2 4cm thick Calcite vein. 3.0 0.0 0.0 0 PW 15 1 Local brecciated section where pyrite vein occurs. 210567 0.004 0.049 Gypsum infilling around plagioclase crystals. 5.0 0.0 0.0 0 CALV 30 1 Calcite vein with some pyrite. 210568 0.002 0.026 Brenda Property 2004 Diamond Drill Log North~ateMinerals Corp.
Hole Number: BR-04-14
From To RockType Py-Cpy-Mt Ms Veins ("tca-%) Comments
190.00 192.00 Fine to coarse grained light grey 5.0 0.0 0.0 0 PW 325 strongly silicified (non-K) 3.0 0.0 0.0 0 CALV 70 3.0 0.0 0.0 0 CALV 45 8 Large Calcitelcarbonatevein. 2.0 0.0 0.0 0 CALV 59 1 3.0 0.0 0.0 0 CALV 68 5 BLOCKING ERROR: 660ft. (201.2m) block is missing with no apparent missing core. Blocks moved ahead one interval. 200.00 202.00 3.0 0.0 0.0 0 CALV 32 1 Large Calcitelcarbonatevein 1117 BRECCIATED INTERMEDIATE FRAGMENTAL 202.00 203.20 Fine to coarse grained light grey 5.0 0.0 0.0 0 PW 39 strongly propyllitic 1203.2111 MASSIVE DACITE FLOW 203.20 204.00 Fine to medium grained light grey 7.0 0.0 0.0 0 CALPY 41 moderately phyllic 204.00 206.00 7.0 0.0 0.0 0 PW 28 0.1 0.1 Slight decrease in pyrite in groundmass 208.00 210.00 Fine to medium grained light grey 3.0 0.0 0.0 0 PW 62 0.1 Decrease in calcite veining. strongly silicified (non-K) 210.00 21 1.20 8.0 0.0 0.0 0 PW 23 7 Pyritelcalcite veins cross-cutting other structures. Increase in pyrite in veins. 1211.21 BRECCIATED INTERMEDIATE FRAGMENTAL VOLCANIC 21 1.20 212.00 Fine to coarse grained green grey 7.0 0.0 0.0 0 CALV 60 0.1 Silicic alteration over a possible propyllitic overprint strongly silicified (non-K) (Chlorite+Epidote). Groundmass contains pyrite. 1 QuartzlPyrite vein: 65% quartz, 35% pyrite. 2 60% quartz, 40% pyrite in vein. 1 216 11 218 1 BRECCIATED INTERMEDIATE FRAGMENTAL FLOW 216.00 218.00 Fine to coarse grained green grey 5.0 0.0 0.0 0 PW 41 0.1 Pyrite vein with a strong propyllitic alteration halo. Local strongly propyllitic zone with strong propyllitic alteration. Brenda Property 2004 Diamond Drill Log Northgate Minerals Corp.
I Hole Number: BR-04-14
RockType Py-Cpy-Mt Ms Veins (Otca-%) Comments sample# CU AU From To % ppm 11 11218.6BRECCIATED INTERMEDIATE FRAGMENTALVOLCANIC 218.00 218.60 Fine to coarse grained green grey 5.0 0.0 0.0 0 CALV 52 5 strongly silicified (non-K) 1218.6 -220.6 MASSIVE ANDESITE VOLCANIC BRECCIA 218.60 220.60 Fine to coarse grained green 8.0 0.0 0.0 0 CALV 57 15 Andestie with porphorytic andesite phenocrysts. Local 210587 0.003 0.157 intensely propyllitic zone about 1.5m in length of calcite veins of various orientations, some contain pyrite. 1220.6111 BRECCIATED INTERMEDIATE FRAGMENTALVOLCANIC 220.60 222.00 Fine to coarse grained green grey 3.0 0.0 0.0 0 cv 44 2 Pyrite occurs in clasts. 210588 0.003 0.054 intensely propyllitic 11 11225.2BRECCIATED INTERMEDIATE FRAGMENTAL FLOW 222.00 224.00 Fine to coarse grained green grey 0 CAUP 45 0.1 60%py, 40% calcite (vein). Pyrite occurring in clasts of strongly propyllitic chlorite. 224.00 225.20 0 PW 45 0.1 Decrease in pyrite. Gypsum veins -8% of sample. 1225.21 MOTTLED DACITE FLOW 225.20 226.00 Fine to medium grained green grey 0 EV 81 1 Small amount of pyrite in Epidote vein. strongly propyllitic 226.00 228.00 Fine to medium grained grey green 0 CALV 70 5 30cm section of IFRG-similar to units above. Pyrite in strongly propyllitic groundmassof dacite. 228.00 230.00 Fine to medium grained grey green 0 QV 22 1 Quartz vein-no mineralization. strongly silicified (non-K) 230.00 232.00 Fine to coarse grained grey green 0 CALV 71 3 Large Anhydrite vein as well. Pyrite occurring in chlorite strongly silicified (non-K) clasts. 232.00 234.00 Fine to medium grained grey green 0 QANV 23 3 Highly altered zone. Motled texture with chlorite clasts. intensely propyllitic Calcite vein with pyrite, also pyrite in QuarWanhydrite vein. 234.00 236.00 Fine to medium grained grey green moderately silicified (non-K) 236.00 238.00 Fine to medium grained grey green 64 3 Gypsum veinlets. Slightly more intense silicic alteration. strongly silicified (non-K)
15-Nov-04 Page 7 of 15 c 3
Brenda Property 2004 Diamond Drill Log Northpate Gorp- I I Hole Number: BR-04-14 From To RockType Py-Cpy-Mt Ms Veins ("tca-%) Comments Sampld $2 6;
238.00 238.80 Fine to medium grained grey green 8.0 0.0 0.0 0 GW 35 1 High concentration of pyrite in a large chlorite clast. 210598 0.001 0.238 strongly silicified (non-K) 1238.8v] BRECCIATED ANDESITE VOLCANIC BRECCIA 238.80 240.00 Fine to coarse grained light grey 2.0 0.0 0.0 0 FLT 45 20 Fault with light green colored sericite-chlorite. 60cm. 210599 0.003 0.120 intensely phyllic Heavy sericite alteration. )I )I 11246.9 STOCKWORKED DACITE FLOW 240.00 242.00 Fine to medium grained grey green 5.0 0.0 0.0 0 CALV 53 8 Chlorite clasts with pyrite. moderately propyllitic 242.00 244.00 7.0 0.0 0.0 0 CALV 46 8 244.00 246.00 7.0 0.0 0.0 0 PW 23 1 246.00 246.90 Fine to medium grained grey green 5.0 0.0 0.0 0 CALV 21 1 Large-very soft light greenish calcite vein-almost talc-like. 210604 0.002 0.206 strongly propyllitic 1246.911248.4 MASSIVE GRANITE INTRUSIVE 246.90 248.40 Medium to coarse grained brown 7.0 0.0 0.0 0 FLT 65 3 Section of Medium to coarse grained intrusive containing 210605 0.003 0.283 strongly potassic - chlorite-quartz pyrite. 1248.4 11 STOCKWORKED DACITE FLOW 248.40 250.00 Fine to medium grained grey green 10.0 0.0 0.0 0 PW 28 2 3 pyrite veins 210606 0.021 0.448 strongly propyllitic 250.00 252.00 5.0 0.0 0.0 0 CALV 12 5 210607 0.029 0.568 17 111 STOCKWORKED MONZONITE INTRUSIVE 252.00 253.80 Fine to coarse grained maroon 0.0 0.0 0.0 12 CALZV 55 7 Porphorytic dyke-more intense veining-nomineralization. 210608 0.002 0.014 strongly potassic - chlorite-quartz MASSIVE DACITE FLOW pqT/254 3 253.80 254.30 Fine to medium grained grey green 7.0 0.0 0.0 1 pyv 9 5 50cm section of Dacite-containing pyrite vein. 210609 0.011 0.102 strongly propyllitic 1- 1- F1 STOCKWORKED MONZONITE INTRUSIVE 254.30 256.00 Fine to coarse grained maroon 0.0 0.0 0.0 14 CALZV 58 7 Same as at 253.8m. strongly potassic - chloritequartz 256.00 258.00 0.0 0.0 0.0 13 CALZV 58 7 Brenda Property 2004 Diamond Drill Log Northgate Minerals Corp.
I Hole Number: BR-04-14
From To RockType Py-Cpy-Mt Ms Veins ("tca-%) Comments
258.00 260.00 Fine to coarse grained maroon 0.0 0.0 0.0 9 CALZV 61 5 strongly potassic - chlorite-quartz 260.00 262.00 0.0 0.0 0.0 8 FLT 30 0.1 Fault infilled with clay and lithic fragments. 262.00 264.00 0.0 0.0 0.0 12 CALZV 57 2 Less veining /1/1] STOCKWORKED DACITE FLOW 264.00 266.00 Fine to medium grained moderately 7.0 0.0 0.0 0 PW 44 2 Several small pyrite veins silicified (non-K) 266.00 268.40 7.0 0.0 0.0 0 PW 19 0.1 Pyrite vein -1cm thick. (1 (1 VI PORPHYRITIC MONZONITE INTRUSIVE 268.40 270.00 Fine to coarse grained maroon 1.0 0.0 0.0 11 CALV 58 2 Graded contact with dacite. 10cm chunk of dacite-some strongly potassic - chlorite-quartz mineralization in contact. 270.00 272.00 0.0 0.0 0.0 15 FLT 20 0.1 Small fault. Calcitelzeoliteveinlets. 272.00 274.00 1.0 0.0 0.0 14 CALV 61 2 1Ocm section of dacite-contains pyrite /I 111STOCKWORKED DACITE FLOW 274.00 276.00 Fine to medium grained dark grey 7.0 0.0 0.0 2 PW 24 1 20cm section of dyke. Zone of intense sericitic alteration intensely phyllic at contact with dyke. 276.00 278.00 Fine to medium grained dark grey 10.0 0.0 0.0 I QPW 22 0.1 Quartz vein with pyrite in the center. strongly phyllic Epidotelcalcitelgypsum veins. 278.00 280.00 8.0 0.0 0.0 0 GYV 3 1 280.00 280.90 Fine to medium grained dark grey 7.0 0.0 0.0 0 EV 52 5 Epidote veins-propyllitic alteration strongly propyllitic 1280.911282.9 PORPHYRITIC MONZONITE INTRUSIVE 280.90 282.90 Fine to coarse grained red intensely 0.0 0.0 0.0 2 CALV 46 10 Mags low for porphorytic dyke. 210624 0.002 0.000 potassic - chlorite-quartz 1282 91 MASSIVE DACITE FLOW 282.90 284.00 Fine to medium grained grey strongly 7.0 0.1 0.0 0 CALV 58 5 Specs of Chalcopyrite. 210625 0.025 0.885 propyllitic 284.00 286.00 7.0 0.2 0.0 0 PW 44 0.1 Several small blebs of Chalcopyrite-some in Gypsum 210626 0.042 0.573 veins as well.
15-Nov-04 Page 9 of 15 Brenda Property 2004 Diamond Drill Log Northgate Minerals Corp.
I Hole Number: BR-04-14 From To RockType Py-Cpy-Mt Ms Veins ("tca-YO) Comments sample# 5; k,"
286.00 288.00 Fine to coarse grained dark grey 2.0 0.0 0.0 0 CALV 32 10 Decrease in pyrite. Intense sericitic alteration. 210627 0.040 0.089 intensely phyllic 288.00 290.00 2.0 0.0 0.0 0 CALV 76 20 Local sheared zone-large calcite vein. 290.00 292.00 Fine to coarse grained dark grey 5.0 0.0 0.0 0 sv 62 2 Slight increase in pyrite strongly phyllic 292.00 294.00 5.0 0.0 0.0 0 pw 46 1 3 small pyrite veins 294.00 296.00 5.0 0.0 0.0 0 sv 49 5 Several sericite veins 296.00 298.00 Fine to coarse grained light grey 4.0 0.0 0.0 0 pw 30 3 Increase in pyrite-silicic alteration. strongly silicified (non-K) 298.00 300.00 2.0 0.0 0.0 I Gw 61 0.1 Local zone of intense propyllitic alteration-green in color- 210635 0.003 0.019 no mineralization. Local zone with high mags readings (>lo). 5.0 0.0 0.0 0 GW 35 2 210636 0.002 0.079 304.00 306.00 Fine to coarse grained light grey 3.0 0.0 0.0 0 pw 68 0.1 Slight decrease in pyrite in groundmass intensely silicified (non-K) 306.00 306.70 7.0 0.0 0.0 0 pw 82 0.1 Increase in pyrite. 1305.7/I BRECCIATED DACITE VOLCANIC BRECCIA 306.70 308.00 Fine to coarse grained grey green 8.0 0.0 0.0 0 pw 42 0.1 Pyrite occurring in clasts with chlorite. strongly propyllitic 308.00 310.00 7.0 0.0 0.0 0 CALV 68 2 31 0.00 31 2.00 5.0 0.0 0.0 0 CALV 71 5 / 3121 FLOW BANDED DACITE FLOW 312.00 314.00 Fine to coarse grained grey strongly 8.0 0.0 0.0 0 pw 24 2 Pyrite in veins. Some larger clasts in dacite. Large 210642 0.009 0.212 silicified (non-K) calcite veins contain some pyrite. 314.00 316.00 8.0 0.0 0.0 0 QV 28 7 Quartz vein with pyrite. Pyrite in groundmass. 210643 0.002 0 249 316.00 318.00 Fine to coarse grained grey strongly 5.0 0.0 0.0 0 PW 54 1 210644 0.014 0.103 phyllic 31 8.00 320.00 5.0 0.0 0.0 0 pw 46 0.1 210645 0.021 0.166
15-Nov-04 Page 10 of 15 Brenda Property 2004 Diamond Drill Log Northgate Minerals Corp.
Hole Number: BR-04-14
From To RockType Py-Cpy-Mt Ms Veins ('tca-YO) Comments sample# 2 kt 320.00 321.30 Fine to coarse grained grey strongly 7.0 0.0 0.0 0 QV 76 5 Large quartz vein-no mineralization. Pyrite in 210646 0.011 0.432 phyllic groundmass. 1321.3VI MOTTLED INTERMEDIATE FRAGMENTALVOLCANIC BRECCIA 321.30 324.00 Fine to coarse grained grey strongly 7.0 0.0 0.0 0 ~w 63 3 Pyrite in clasts 210647 0.009 0.234 propyllitic 324.00 325.40 5.0 0.0 0.0 0 CALV 69 3 Some zeolite stockworking near end of sample. 210648 0.005 0.092 1325.41 PORPHYRITIC MONZONITE INTRUSIVE 325.40 326.00 Medium to coarse grained red 0.0 0.0 0.0 4 EV 63 2 Porphorytic dyke-gradational contact. moderately potassic - chloritequartz 326.00 328.00 Medium to coarse grained red 0.0 0.0 0.0 8 CALV 27 1 strongly potassic - chlorite-quartz 328.00 330.00 0.0 0.0 0.0 8 EV 24 0.1 330.00 332.00 0.0 0.0 0.0 6 CALEV 28 2 Local zone with low mags near CaVEpidote vein. 210652 0.001 0.000 0.0 0.0 0.0 12 CALV 38 1 0.0 0.0 0.0 12 CALV 20 0.1 0.0 0.0 0.0 12 CALV 25 1 0.0 0.0 0.0 11 CALZV 62 0.1 0.0 0.0 0.0 8 CALV 33 2 Trace of pyrite near EplCal vein. 0.0 0.0 0.0 7 CALEV 17 0.1 Gradational contact woth dacite /343.(1/\MOTTLED DACITE FLOW 343.10 344.00 Fine to coarse grained light grey 5.0 0.0 0.0 0 CALV 66 1 Mottled texture-chlorite clasts-contain some pyrite. 210660 0.003 0.189 moderately phyllic 344.00 346.00 Fine to coarse grained light grey 7.0 0.0 0.0 0 QV 29 1 1.5cm thick quartz vein. 210661 0001 0.132 strongly silicified (non-K) 346.00 348.00 5.0 0.0 0.0 0 pw 44 0.1 Pyrite occurring in chlorite clasts 210662 0.006 0.366 348.00 350.00 7.0 0.0 0.0 0 QANV 45 2 210663 0.008 0.404 350.00 352.00 5.0 0.0 0.0 0 GW 77 2 Mottled epidote and chlorite 210664 0.005 0.080 352.00 354.00 7.0 0.0 0.0 0 pw 29 0.1 Quartz veins with blebs of pyrite, epidote+chlorite. 210665 0.013 0.110
15-Nov-04 Page 11 of 15 ("""1 el 4 3
Brenda Property 2004 Diamond Drill Log Northgate Minerals Corp.
1 ole Number: BR-04-14
From To RockType Py-Cpy-Mt Ms Veins ('tca-%) Comments
354.00 356.00 Fine to coarse grained light grey 7.0 0.0 0.0 0 QV 60 1 Quartz vein with moly. strongly silicified (non-K) 356.00 358.00 7.0 0.0 0 GW 62 1 Gypsum vein containing trace of chalcopyrite. BLOCKING ERROR: Blocks skip from 1170ft. To 1190 ft. (no 1180ft block) with no apparent missing core. Blocks shifted forward one more position (blocks ar now being shifted two positions ahead). 358.00 360.00 Fine to coarse grained grey green 5.0 0.1 0.0 0 CALV 60 0.1 Calcite vin with trace of Cpy. strongly propyllitic 360.00 362.00 5.0 0.1 0.0 0 GW 66 2 Gypsum vein with chalcopyrite. Also Cpy. Present in quartz vein. 362.00 364.00 5.0 0.1 0.0 0 QV 71 0.1 Quartz vein with very small amount of chalcopyrite. 5.0 0.0 0.0 0 CALV 36 5 5.0 0.0 0.0 0 CALV 42 5 3.0 0.0 0.0 2 CAW 62 5 Decrease in pyrite, increase in Mags. 1- 1- 51 MASSlVE BASALT FLOW 369.50 370.00 Fine to medium grained dark green 0.0 0.0 0.0 39 CALV 82 0.1 High primary magnetite-sharp contact strongly propyllitic 370.00 372.00 0.0 0.0 0.0 35 CALV 64 1 /] MOTTLED DACITE VOLCANIC BRECCIA 372.00 374.00 Fine to medium grained light grey 3.0 0.0 0.0 0 PW 30 0.1 strongly silicified (non-K) 374.00 376.00 5.0 0.0 0.0 0 PW 34 0.1 Pyrite vein with calcite. Slightly more pyrite in clasts. 8.0 0.0 0.0 0 PW 22 0.1 Pyrite vein cross-cut by by calcite vein. More pyrite in groundmass. 378.00 380.00 Fine to medium grained light grey 10.0 0.0 0 QV 64 20 Small spec of Cpy. And Moly in Quartz vein. Large intensely silicified (non-K) section of quartz veining. 380.00 382.00 8.0 0.1 0.0 0 QV 50 5 Quartz vein with chalcopyrite. 382.00 384.00 8.0 0.1 0.0 0 QV 42 2 as above
15-Nov-04 Page 12 of 15 Brenda Property 2004 Diamond Drill Log Northgate Minerals Corp.
Hole Number: BR-04-14 1
Py-Cpy-Mt Ms Veins ('tca-%) Comments Cu Au From To RockType % ppm 384.00 386.00 Fine to medium grained light grey 8.0 0.2 0.0 2 QV 45 2 Large quartz-rich intrusive clast surrounded by a chlorite strongly silicified (non-K) pyrite outline. 2 quarwcalcite veins conaining chalcopyrite. Zone containing the Cpy-bearing vein has higher Mags -8. 386.00 388.00 8.0 0.4 0.0 2 QV 50 3 Chalcopyrite in Quartz veins. Quartz veins are cross cutting the other structures. 388.00 390.00 Fine to medium grained light grey 8.0 0.2 0.0 0 QV 45 5 As above-alteration more intense. intensely silicified (non-K) 390.00 392.00 5.0 0.0 0.0 0 QV 51 1 Decrease in mineralization 7.0 0.5 0.0 0 QV 58 8 Large quartz vein rich in chalcopyrite-large blebs (-20% of vein is Cpy.) 8.0 0.0 0.0 0 QV 60 2 Quartz vein with pyrite 396.00 398.00 7.0 0.2 0.0 0 CALV 60 1 2 calcite veins with chalcopyrite. 10.0 1.0 0.0 0 QV 45 8 Qtz. Vein rich in Cpy.(-20%). Several other quartz veins containing Cpy. 10.0 2.0 0.0 0 QV 57 10 Very large blebs of Cpy. In quartz vein. Moly present in vein as well. 402.00 404.00 10.0 1.5 0.0 0 QV 54 10 Several Qtz. Veins w1Cpy. 404.00 406.00 Fine to medium grained grey green 5.0 0.1 0.0 0 QV 60 0.1 Decrease in mineralization-alteration changes to strongly propyllitic propyllitic.
8.0 0.0 0.0 0 QV 60 1 Quartz vein with appearannce and orientation similar to Cpy bearing veins. Pyrite veins present as well. 410.00 412.00 15.0 0.0 0.0 0 pyv 48 5 Increase in pyrite. Several pyrite veinlets 412.00 414.00 Fine to medium grained light grey 10.0 0.0 0.0 0 QANV 60 3 Large Quartz-anhydrite vein. Several pyrite veinlets. strongly silicified (non-K) MOTTLED QUARTZ MONZONITE INTRUSIVE pqrl418 4 414.00 416.00 Fine to medium grained light grey 10.0 1.0 0.0 0 QV 62 25 Heavily silicified zone. Quartz vein rich in CPY and intensely silicified (non-K) Pyrite. 416.00 418.40 5.0 0.0 0.0 0 QV 30 90 Section possibly one large quartz vein?
15-Nov-04 Page 13of15 Brenda Property 2004 Diamond Drill Log Northgate Minerals Corp.
Hole Number: BR-04-14
RockType Py-Cpy-Mt Ms Veins (%a-%) Comments Cu Au From To % ppm 14184 1/ MOTTLED DACITE VOLCANIC BRECCIA 418.40 420.00 Fine to medium grained grey green 7.0 0.1 0.0 0 PW 32 0.1 More Moly. Trace of Cpy. In groundmass strongly propyllitic 420.00 422.00 8.0 0.0 0.0 0 QPW 65 1 Pyrite in large chlorite clast. 422.00 424.00 10.0 0.0 0.0 0 PW 34 0.1 11 VI MASSIVE DACITE FLOW 424.00 426.00 Fine to medium grained dark grey 8.0 0.1 0.0 0 PW 12 0.1 Trace of Cpy. In groundmass moderately propyllitic 426.00 428.00 Fine to medium grained dark grey 8.0 0.0 0.2 10 PW 34 0.1 Zones with high Mags s20. One magnetite crystal. strongly propyllitic 11 111 FLOW BANDED ANDESITE FLOW 428.00 430.00 Fine to medium grained green grey 7.0 0.0 0.0 I PW 32 0.1 Potassic alteration zone zeolite, epidote, and calcite intensely potassic - quartz-chlorite veins. /11 BRECCIATED ANDESITE VOLCANIC BRECCIA 430.00 432.00 Fine to medium grained green grey 8.0 0.0 0.0 2 PW 50 0.1 Zone with high Mag S at Pyrite vein. strongly propyllitic 14321 BRECCIATED BASALT VOLCANIC BRECCIA 432.00 434.00 Fine to medium grained dark green 10.0 0.0 0.1 10 CALV 33 0.1 2 magnetite crystals. Zone with high primary strongly propyllitic magnetitelchlorite. 434.00 436.00 Fine to medium grained dark green 8.0 0.0 0.0 4 QPW 70 0.1 Potassic alteration zone zeolite, epidote, and calcite strongly phyllic veins. 436.00 438.00 Fine to medium grained dark green 8.0 0.1 0.0 11 QANV 19 2 QuarWAnhydrite vein with pyrite. Trace of Cpy. In quartz strongly propyllitic vein. 438.00 440.00 7.0 0.0 0.0 6 CALZV 27 5 Large CalciteIZeolite vein. Pyrite mostly in chlorite clasts 440.00 442.00 7.0 0.1 0.0 13 QV 88 1 QuartzIAnhydrite vein with chalcopyrite. 17 1STOCKWORKED BASALT FLOW 442.00 444.00 Fine to medium grained dark green 7.0 0.2 0.0 I QV 38 2 Cpy. In Quartz veins-several small ones, one larger one. strongly propyllitic Moly present again.
15-NOV-04 Page 14 of 15 Brenda Property 2004 Diamond Drill Log Northgate Minerals Corp.
1 Hole Number: BR-04-14 I
From To RockType Py-Cpy-Mt Ms Veins ("tca-%) Comments
444.00 446.00 Fine to medium grained dark grey 10.0 0.0 0.0 0 pw 40 4 Some potassic alteration. strongly propyllitic 446.00 448.00 Fine to medium grained dark grey 8.0 0.0 0.0 I PW 44 1 Moly present. Graded contact with porphorytic dyke. 210490 0.031 0.222 moderately propyllitic 451 PORPHYRITIC MONZONITE INTRUSIVE 448.00 450.00 Medium to coarse grained red 0.0 0.0 0.0 9 EV 48 2 Porphorytic dyke. 210491 0.001 0.000 intensely propyllitic 450.00 451 .I0 0.0 0.0 0.0 8 EV 41 1 End of Hole 210492 0.002 0 018 451.1 EOH
1 5-Nov-04 Page 15 of 15
Hole #: I Date: I l~oggedby: BR-04-1 I JULY 10104 MARK REIN Depth to Recov Recov RQD RQD Hardness (m) (m) % (m) % 106.7 1.5 1 0 0 3 109.7 0.9 30 0 0 3 112.8 1 32 0 0 3 115.8 0.1 3 0 0 3 118.9 0.5 16 0 0 3 121.9 0.4 13 0 0 3 125 0.5 16 0 0 3 128 0.9 30 0 0 3 EOH
173.7 I.5 100 0.7 47 2 175.3 1.6 100 1.3 8 1 2 176.8 1.5 100 0.9 60 2 178.3 1.5 100 1.1 73 2 179.8 1.5 100 0.7 47 2 180.4 0.6 100 0.4 67 2 182.9 2.5 100 1 40 2 185.9 2.8 93 0.6 20 2 189 2.5 81 0.6 19 2 192 2.5 83 1 33 2 195.1 3.1 100 1.2 39 2 198.1 1.4 47 0.7 23 2 199.6 0.2 13 0 0 2 201.2 0.3 19 0 0 2 204.2 0.2 7 0 0 2 207.3 1.1 35 0 0 2 210.3 2.3 77 0.3 10 2 213.4 2.8 90 0.9 29 2 216.4 2.8 93 0.5 17 2 219.5 2.9 94 3 97 2 222.5 3.1 103 2.1 70 2 225.6 3.1 100 2.1 68 2 EOH 2
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nn7F~,?,F0T7m~~T????Ymmmmmo!C90!~mY~o!C9 zgr-N r ~NNNNO~N~NNN~NNNO m NN w -0 > 5 000000000000000000000000000000 gwQ,,.O ONOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO g>abbr rryrrrrrrrrrrrrrrrr~r~rr~r~~ry JIY -2 > 0 8E~mgm;m;m &m&m&mrrrvrr &m&m hm~m~m;mm~m~m~m IY m gr9 qqqmmmc~rnmm~),~7~qy~m~~q*qq~k~qq~? ~~S~~mco~+~~~~~~~~~mco~~~oma~)~mrn~~~omao ~4~,mmm~aa~~~~coco,,o,o,ooo~~~~~~~mmm0b~~~ =go rvrrrcrryrrv rrNNNNNNNNNNNNNNNNN
o: NORTHGATE EXPLORATION 4 Page: I AIS Chemex KEMESS MlNE Finalized Date: 25 JUL-2004 EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 3519 Account NORTEX ALS Canada Ltd SMITHERS BC WJ 2N0 21 2 Brooksbank Avenue North Vancouver BC V7J 2C1 Canada Phone: 604 984 0221 Fax: 604 984 0218
CERTIFICATE VA04046158 SAMPLE PREPARATION ALS CODE DESCRIPTION Project: 4090 WEI-21 Received Sample Weight P.O. No.: 279018 LOG-22 Sample login - Rcd wlo Barcode LOG-24 Pulp Login - Rcd wlo Barcode This report is for 174 Other samples submitted to our lab in Varcouver, BC, Canada on PUL-31 Pulverize split to 85% ~75um 19-JUL-2004. The following have access to data associated with this certificate: CARL EDMUNDS RON KONST ANALYTICAL PROCEDURES ALS CODE DESCRIPTION INSTRUMENT Au-AA23 Au 309 FA-AA finish Cu-AA49 Assay Cu - HBr Digestion ME-ICP41 34 Element Aqua Regia ICP-AES ICP-AES
To: NORTHGATE EXPLORATION ATTN: CARL EDMUNDS KEMESS MlNE PO BOX 3519 SMITHERS BC WJ 2N0
(-3 This is the Find Report and supersedes any preliminary report with this certificate number. Results apply to samples as Signature: x4 Method WEI-21 Au-AA23 CU-M49 ME-ICP41 ME-ICP41 ME-lCP4l ME-lCP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-lCP4l ME-ICP41 ME-ICP41 Analyte Recvd Wt. Au Cu AS Al As B Ba Be Bi Ca Cd Co Cr Cu Units kg PP~ 36 PP~ % PP~ PP~ PP~ PP~ PP~ % PP~ Sample Description LOR PP~ PP~ PP~ 0.02 0.005 0.001 0.2 0.01 2 10 10 0.5 2 0.01 0.5 1 1 I 210001 0.24 C0.005 0.006 0.2 5.16 8 Method Analyte Units Sample Description LOR bko:NORTHGATE EXPLORATION Page: 3 - A ALS Chemex KEMESS MINE Total # Pages: 6 (A - C) EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 3519 Finalized Date: 25 JUL-2004 ALS Canada Ltd. Account NORTEX 212 Brooksbank Avenue Nolth Vancouver BC V7J 2C1 Canada Phone: 604 984 0221 Fax: 604 984 0218 Project 4090 CERTIFICATE OF ANALYSIS VA04046158 Method WEI-21 Au-AA23 CU-AA49 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-lCP41 ME-ICP41 Analyte Recvd Wt. Au Cu AS A1 As B Ba Be Bi Ca Cd Co Cr Cu Units kg PP~ % PP~ % PP~ PP~ PP~ PP~ PP~ PP~ Sample Description LOR '+Yo PP~ PP~ PP~ 0.02 0.005 0.001 0.2 0.01 2 10 10 0.5 2 0.01 0.5 1 1 1 0.26 0.011 0.015 0.7 2.10 10 Method ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 Analyte Fe Ga Hsl K La Msl Mn Mo Na Ni P Pb S Sb Sc Units O.O1X PP~ PP~ 56 PP~ % PP~ PP~ % PP~ PP~ PP~ 9b PP~ PP~ Sample Description LOR I0 1 0.01 10 0.01 5 1 0.01 1 10 2 0.01 2 1 210041 4.72 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-IGP41 Analyte Ti TI U V W Zn Units Yo PPm PPm PP~ PP~ PP~ Sample Description LOR 1 p:m 0.01 10 10 1 10 2 ' i'o: NORTHGATE EXPLORATION 3Page: 4 - A ALS Chemex KEMESS MINE Total # Pages: 6 (A - C) EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 3519 Finalized ~at&25~~L-2004 ALS Canada Ltd SMITHERS BC WJ 2NO Account NORTEX 212 Brooksbank Avenue NO" Vancouver BC WJ 2C1 Canada (A L s) Phone: 604 984 0221 Fax: 604 984 0218 Project: 4090 CERTIFICATE OF ANALYSIS VA04046158 I hlethod WE131 Au-AA23 Cu-AA49 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-lCP4l ME-ICP41 ME-ICP4I ME-ICP41 ME-ICP4I ME-ICP41 Analyte Recvd Wt. Au Cu Ag Al As B Ba Be Bi Ca Cd Co Cr Cu Units ample Description LOR L_J(O: NORTHGATE EXPLORATION 4page:4 - B ALS Chernex KEMESS MINE Total # Pages: 6 (A - C) EXCEUENCE INANALYTICAL CHEMISTRY PO BOX 3519 Finalized Date: 25-JUL-2004 ALS Canada Ltd SMITHERS BC WJ 2N0 Account NORTEX 212 Brooksbank Avenue North Vancouver BC WJ 2C1 Canada (A L s) Phone: 604 984 0221 Fax: 604 984 0218 Proiect: 4090 I CERTIFICATE OF ANALYSIS VA04046158 Method ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-lCP41 Analyte Fe Ga HS K La Mg Mn Mo Na Ni P Pb S Sb Sc Units Yo PP~ PP~ 56 PP~ YO npm PD~ % prim pnm PP~ YO PP~ PP~ Sample Description LOR 0.01 10 1 0.01 10 0.01 5 1 0.01 1 10 2 0.01 2 1 21 0081 5.79 C10 Cl 0.19 10 0.01 15 29 0.01 C1 680 27 >10.0 c2 1 21 0082 4.91 c10 Cl 0.14 10 0.01 24 11 CO.01 1 620 61 8.63 C2 c1 210083 5.15 210086 4.33 210091 5.43 C10 Cl 0.19 C10 0.94 345 4 0.01 1 900 28 8.69 C2 1 21 0092 4.85 40 Cl 0.14 10 1.03 447 23 0.01 1 830 42 8.10 c2 1 21 0093 3.63 C10 Cl 0.22 10 0.31 21 7 25 0.01 1 640 48 7.39 C2 1 210094 4.38 C10 41 0.13 10 0.02 26 20 0.01 1 690 110 9.30 <2 1 210095 3.81 40 c1 0.22 10 0.38 554 12 0.01 '2 790 277 6.17 C2 1 210096 3.42 - I CERTIFICATE OF ANALYSIS VA04046158 Method Analyte Units Sample Description LOR 210081 21 0082 210083 21 0084 21 0085 21 0086 21 0087 21 0088 21 0089 210090 (uJ: NORTHGATE EXPLORATION ( dPage: 5 - A ALS Chernex KEMESS MINE Total #'Pages: 6 (A - C) EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 3519 Finalized Date: 25 JUL-2004 ALS Canada Ltd SMITHERS BC WJ 2N0 Account NORTEX 212 Brooksbank Avenue North Vancouver BC V7J 2C1 Canada Phone: 604 984 0221 Fax: 604 984 0218 Proiect: 4090 I CERTIFICATE OF ANALYSIS VA04046158 I I ~.thod WEI-21 AuAA23 CU-AA49 ME-lCP4l ME-ICP41 MblCP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 Analyte Recvd Wt. Au Cu As Al As B Be Be Bl Ca Cd Co Cr Cu.. Units kg PP~ % PP~ OX PP~ nnm mom PP~ PP~ % PP~ porn PP~ PP~ .amp* muription o O.ot 1 ' 1 1 .( 0.005 0.001 0.2 0.01 2 10 10 0.5 2 0.01 0.5 10: NORTHGATE EXPLORATION Jpage: 5 - B ALS Chemex KEMESS MINE Total # Pages: 6 (A - C) EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 3519 Finalized Date: 25-JUL-2004 ALS Canada Ltd SMITHERS BC WJ 2N0 Account NORTEX 212 Brooksbank Avenue North Vancouver BC V7J 2C1 Canada (A L Z;) Phone: 604 984 0221 Fax: 604 984 0218 Project 4090 CERTIFICATE ANALYSIS VA04046158 I OF Method ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-lCP4l ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP4I Analyte Fe Ga HS K La Mg Mn Mo Na Ni P Pb S Sb Sc Units X PP~ PP~ % PP~ "/. PP~ PP~ Yo PP~ PP~ PP~ Yo PP~ PP~ Sample Description LOR 0.01 10 1 0.01 10 0.01 5 1 0.01 1 10 2 0.01 2 1 '30:NORTHGATE EXPLORATION 3Page: 5 - C ALS Chern~x KEMESS MINE Total # Pages: 6 (A - C) EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 3519 Finalized Date: 25JUL-2004 ALS Canada Lld SMITHERS BC WJ 2N0 Account NORTEX 212 Bmoksbank Avenue North Vancouver BC V7J 2Cl Canada (A L s) Phone: 604 984 0221 Fax: 604 984 0218 Project: 4090 CERTIFICATE OF ANALYSIS VA04046158 I I I Methd 1 WE-ICP4I ME-ICP41 ME-ICP41 ME-lCP41 ME-lCP41 ME-lCP41 ME-ICP41 Analyte Sr Ti TI U V W Zn Units ppm % PP~ PP~ PP~ PP~ PP~ ISample Description LOR I 0.01 lo 10 1 10 2 I ' "To: NORTHGATE EXPLORATION KEMESS MINE Total # pages: 6 (A - C) EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 3519 Finalized Date: 25JUL-2004 ALS Canada Ltd. SMITHERS BC WJ 2N0 Account NORTEX A 212 Brooksbank Avenue No* Vancouver BC WJ 2Cl Canada (A L s) Phone: 604 984 0221 Fax: 604 984 0218 Proiect: 4090 I CERTIFICATE OF ANALYSIS VA04046158 I I I Method WEI-21 AU-AA23 CU-AA49 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 MEICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 halfla 1 Rwvd Wt. AII Cu Ag Al A+ B Ba Be Bi Ca Cd Co Cr Cu Units kg PP~ Yo PP~ % PP~ PP~ PP~ PP~ PP~ Yo PP~ PP~ PP~ PP~ Sample Description LOR 0.02 0.005 0.001 0.2 0.01 2 10 10 0.5 2 0.01 0.5 1 1 1 +'TO: NORTHGATE EXPLORATION 3Page: 6 - B AIS Chernex KEMESS MINE Total # Pages: 6 (A - C) EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 3519 Finalized Date: 25 JUL-2004 ALS Canada Lid SMITHERS BC WJ 2N0 Account NORTEX 21 2 Bmoksbank Avenue North Vancouver BC V7J 2C1 Canada Phone. 604 984 0221 Fax. 604 984 0218 Project: 4090 CERTIFICATE OF ANALYSIS VA04046158 Method MEICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-lCP41 ME-ICP41 ME-ICP41 ME-lCP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-lCP41 ME-ICP41 Analyte Fe Ga Ha K La MS Mn Mo Na Ni P Pb S Sb Sc PP~ PP~ % PP~ % PP~ PP~ % PP~ PP~ PP~ % PP~ Sample Description 1 Oz, 10 1 0.01 10 0.01 5 1 0.01 1 10 2 0.01 2 1 I b'ro:NORTHGATE EXPLORATION 3 Page: 6 - C KEMESS MINE Total # Pages: 6 (A - C) EXCELLENCE INANALYTICAL CHEMISTRY PO BOX 3519 Finalized ~atg25JUL-2004 ALS Canada Ltd SMITHERS BC WJ 2NO Account NORTEX 212 Brooksbank Avenue North Vancouver BC V7J 2C1 Canada Phone: 604 984 0221 Fax: 604 984 0218 Project 4090 I CERTIFICATE OF ANALYSIS VA04046158 Mhod MElCP41 MEICP41 ME-ICP41 ME-lCP41 ME-ICP41 MEICP41 ME-iCP41 Analyte Sr Ti TI U V W Zn Units PP~ % DPm PPm PP~ PP~ VP~ Sample Description LOR 1 0.01 10 10 1 10 2 160 0.02 c10 c10 27 c10 249 268 0.01 40 c10 9 -=lo 336 210 0 01 c10 c10 5 c10 389 394 co.01 c10 c10 7 CERTIFICATE VA04048435 I SAMPLE PREPARATION ALS CODE DESCRIPTION Project: 4090 WEI-21 Received Sample Weight P.O. No.: 279018 LOG-22 Sample login - Rcd wlo Barcode PUL-31 Pulverize split to 85% <75 um This report is for 50 Drill Core samples submitted to our lab in Vanccuver, BC, Canada on 26-JUL-2004. The following have access to data associated with this certificate: ANALYTICAL PROCEDURES CARL EDMUNDS RON KONST ALS CODE DESCRIPTION INSTRUMENT I I Au-AA23 Au 309 FA-AA finish AAS Cu-AA49 Assay Cu - HBr Digestion AAS ME-ICP41 34 Element Aqua Regia ICP-AES ICP-AES To: NORTHGATE EXPLORATION ATTN: CARL EDMUNDS KEMESS MINE PO BOX 3519 SMlTHERS BC WJ 2N0 &----.7 This is the Final Report and supersede any preliminary report with this certificate number. Results apply to samples as Signature: d-dd2& submitted. All pages ofthis report have been checked andapproved for release. 4x---- I I -to: NORTHGATE EXPLORATION 3Page: 2 - A ALS Chemex KEMESS MINE Total # Pages: 3 (A - C) EXCEUENCE IN ANALYTICAL CHEMISTRY PO BOX 3519 Finalized Date: 8-AUG-2004 ALS Canada Ltd SMITHERS BC WJ 2N0 Account NORTEX 212 Bmoksbank Avenue m North Vancouver BC WJ 2CI Canada (A L 5) Phone: 604 984 0221 Fax: 604 984 0218 Proiect: 4090 I CERTIFICATE OF ANALYSIS VA04048435 sethod WEWI Au-AA23 Cu-AA49 ME-ICP41 ME-ICP41 ME-ICP41 ME-lCP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 Analyte Recvd Wt. Au Cu AS A1 As B Ba Be Bi Ca Cd Co Cr Cu Units ono2ka PP~ % PP~ % PP~ PP~ PP~ PP~ PP~ % PP~ PP~ PP~ PP~ Sample Description LOR 0.005 0.001 0.2 0.01 2 10 10 0.5 2 0.01 0.5 1 1 1 210209 0.24 0.008 0.020 0.3 2.21 12 Units % PP~ PP~ 9~ PP~ x PP~ PD~ x PP~ PP~ PP~ 9~ PP~ PP~ Sample Description LOR O.O1 10 1 0.01 10 0.01 5 1 0.01 I 10 2 0.01 2 1 TO: NORTHGATE EXPLORATION '&page: 2 - c ALS Chemex KEMESS MINE Total # Pages: 3 (A - C) EXCEUENCE IN ANALYTICAL CHEMISTRY PO BOX 3519 Finalized Date: 8AUG-2004 ALS Canada Ltd. SMlTHERS BC MJ2NO Account NORTEX A 212 Brooksbank Avenue Notth Vancouver BC V7J 2CI Canada (A L s) Phone: 604 984 0221 Fax: 604 984 0218 Project: 4090 CERTIFICATE OF ANALYSIS VA04048435 I I 1 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 Analyte Ti TI U V W Zn Units PPm 0/. PP~ PP~ PP~ PP~ PP~ Sample Description LOR I 1 0.01 10 10 1 10 2 '-to: NORTHGATE EXPLORATION 3Page: 3 - A ALS Chemex KEMESS MINE Total # Pages: 3 (A - C) EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 3519 Finalized Date: 8AUG-2004 ALS Canada Ltd SMITHERS BC WJ 2NO Account NORTEX 212 Brooksbank Avenue "01th Vancouver BC V7J 2C1 Canada (A L S) Phone: 604 984 0221 Fax: 604 984 0218 Proiect: 4090 CERTIFICATE OF ANALYSIS VA04048435 I 1 1 Method WEI-21 Au-AA23 Cu-AA49 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP4I ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 Analyte Recvd Wt. Au Cu Aa Al As B Ba Be Bi Ca Cd Co Cr Cu Units kS PP~ Yo PP~ % PP~ PP~ PP~ PP~ PP~ Yo PP~ PP~ PP~ PP~ Sample Description LOR 0.02 0.005 0.001 0.2 0.01 2 10 10 0.5 2 0.01 0.5 1 1 q 0.28 0.280 0.084 1.8 1.14 2 c10 70 ~0.5 c2 0.23 1.7 9 37 819 0.28 0.245 0.060 1.1 1.14 C2 C10 80 C0.5 <2 0.29 2.5 8 23 574 0.28 0.216 0.060 1.6 1.18 C2 Method AnaMe Unlts Sample Description LOR WNORTHGATEEXPLORATION KEMESS MlNE Finalized Date: 8-AUG-2004 EXCELLENCE IN ANAL WICAL CHEMISTRY PO BOX 3519 ALS Canada Ltd. Account: NORTEX 212 Brooksbank Avenue SMITHERS BC VOJ 2NO North Vancouver BC V7J 2C1 Canada Phone: 604 984 0221 Fax: 604 984 0218 CERTIFICATE VA04048436 Project: 4090 P.O. No.: 279018 LOG-22 Sample login - Rcd w/o Barcode PUL-31 This report is for 60 Drill Core samples submitted to our lab in Vancouver, BC, Canada on 26-JUL-2004. The following have access to data associated with this certificate: ANALYTICAL PROCEDURES CARL EDMUNDS RON KONST ALS CODE DESCRIPTION INSTRUMENT Au-AA23 Au 309 FA-AA finish AAS Cu-AA49 Assay Cu - HBr Digestion AAS ME-ICP41 34 Element Aqua Regia ICP-AES ICP-AES To: NORTHGATE EXPLORATION ATTN: CARL EDMUNDS KEMESS MlNE PO BOX 351 9 SMITHERS BC VOJ 2N0 This is the Final Report and supersedes any preliminary report with this certificate number. Results apply to samples as Signature: LHd~-2-i~dp -. submitted. All pages of this report have been checked and approved for release. L'-- MORTH~~ExPLoRATloN dge:2 - A ALS Chemex KEMESS MINE Total # Pages: 3 (A - C) EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 3519 Finalized Date: 8AUG-2004 ALS Canada Ltd SMITHERS BC VOJ 2N0 Account: NORTEX 212 Brooksbank Avenue ii North Vancouver BC V7J 2Cl Canada (A L s) Phone: 604 984 0221 Fax: 604 984 0218 Project: 4090 CERTIFICATE OF ANALYSIS ~~04048436 Method WEI-21 AU-AA23 CU-AM9 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-lCP41 ME-lCP41 ME-ICP41 ME-lCP4l ME-ICP41 Analyte Recvd Wt. Au Cu Ag Al As B Ba Be Bi Ca Cd Co Cr Cu Units kg PP~ X PP~ % PP~ PP~ PP~ PP~ PP~ % PP~ PP~ PP~ PP~ Sample Description LOR 0.02 0.005 0.001 0.2 0.01 2 10 10 0.5 2 0.01 0.5 1 I 1 C age: 2 - B ALS Chern~x KEMESS MINE Total # Pages:9 3 (A - C) EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 3519 Finalized Date: 8-AUG-2004 ALS Canada Ltd SMITHERS BC VOJ 2NO Account: NORTEX 212 Brooksbank Avenue North Vancouver BC V7J 2C1 Canada A Phone: 604 984 0221 Fax: 604 984 0218 Project: 4090 CERTIFICATE OF ANALYSIS VA04048436 Method ME-ICP4I ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-lCP4l ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 Analyte Fe Ga Hg K La MB Mn Mo Na Ni P Pb S Sb Sc Units oh PDm DDm % DDm % PDln PP~ % DP~ DDm DDm % DD~ Sample Description LOR 0.01 10 1 0.01 10 0.01 5 1 0.01 1 10 2 0.01 2 1 210175 5 22 I CERTIFICATE OF ANALYSIS VA04048436 I Method ME-ICP4I ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 Analyte Sr Ti TI U V W Zn Units Sarnpk Description LOR I qe:3 -A KEMESS MINE Total # Pages: 3 (A - C) EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 3519 Finalized Date: 8-AUG-2004 ALS Canada Ltd. SMlTHERS BC VOJ 2N0 Account: NORTEX 212 Brooksbank Avenue North Vancouver BC WJ 2Cl Canada Phone: 604 984 0221 Fax: 604 984 0218 Project: 4090 CERTIFICATE OF ANALYSIS VA04048436 Method WEI-21 AU-AA23 CU-AA49 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 Analyte Recvd Wt. Au Cu AB Al As B Ba Be Bi Ca Cd Co Cr Cu Units kg PDm 70 DP~ "/. PP~ DDm DP~ PP~ DP~ % PP~ PP~ DP~ PP~ Sample Description LOR 0.02 0.005 0.001 0.2 0.01 2 I0 I0 0.5 2 0.04 0.5 1 1 1 P" WNORTHGATEEXPLORATION 9age: 3 - B KEMESS MINE Total # Pages: 3 (A - C) EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 3519 Finalized Date: 8-AUG-2004 ALS Canada Ltd. SMITHERS BC VOJ 2N0 Account: NORTEX 212 Brwksbank Avenue North Vancouver BC WJ 2C1 Canada Phone: 604 984 0221 Fax: 604 984 0218 Project: 4090 I CERTIFICATE OF ANALYSIS VA04048436 Method Analyte Units Sample Description LOR 'doRTHGATE ExPLoRAT1oN ALS Chemex KEMESS MINE Total # Pages: 3 (A - C) EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 3519 Finalized Date: 8-AUG-2004 ALS Canada Ltd SMITHERS BC VOJ 2N0 Account: NORTEX 212 Brwksbank Avenue A North Vancouver BC V7J 2C1 Canada (A L s) Phone: 604 984 0221 Fax: 604 984 0218 Project: 4090 I CERTIFICATE OF ANALYSIS VA04048436 I Method Analyte Units Sample Description LOR r"""l -0: NORTHGATE EXPLORATION Page: I KEMESS MlNE Finalized Date: 10-AUG-2004 EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 3519 Account NORTEX ALS Canada Ltd. SMITHERS BC WJ 2NO 212 Brwksbank Avenue North Vancouver BC V7J 2C1 Canada Phone: 604 984 0221 Fax: 604 984 0218 I CERTIFICATE VA04050715 SAMPLE PREPARATION ALS CODE DESCRIPTION Project: 4090 WEI-21 Received Sample Weight P.O. No.: 279018 LOG-22 Sample login - Rcd wlo Barcode PUL-31 Pulverize split to 85% ~75urn This report is for 105 Drill Core samples submitted to our lab in Vanmuver, BC, Canada on 3-AUG-2004. The following have access to data associated with this certificate: ANALYTICAL PROCEDURES CARL EDMUNDS RON KONST ALS CODE DESCRIPTION INSTRUMENT Au-AA23 Au 309 FA-AA finish Cu-AA49 Assay Cu - HBr Digestion ME-ICP41 34 Element Aqua Regia ICP-AES ICP-AES To: NORTHGATE EXPLORATION ATTN: CARL EDMUNDS KEMESS MlNE PO BOX 3519 SMITHERS BC WJ 2NO r'3 ,.Y. This is the Final Report and supersede any preliminary report with this certificate number. Results apply to samples as Signature: k&-x<&:A&, submitted. All pages ofthis report have been checked andapproved for release. ,4-c---- uo: NORTHGATE EXPLORATION &age: 2 - A ALS Chemex KEMESS MINE Total # Pages: 4 (A - C) EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 3519 Finalized Date: 10-AUG-2004 ALS Canada ~td SMITHERS BC WJ 2N0 Account NORTEX 212 Brooksbank Avenue North Vancouver BC V7J 2Cl Canada (A L s) Phone: 604 984 0221 Fax: 604 984 0218 Project: 4090 CERTIFICATE OF ANALYSIS VA04050715 I Method WEI-21 AU-AA23 AU-AA23 AU-AA23 CU-AA49 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-lCP4l halyta I Recvd Wt. Au AuCheck AuCheck Cu A4- Al As B Ba Be Bi Ca Cd Co I Units ks PP~ PP~ PP~ x PP~ "/. PP~ PP~ PP~ PP~ PP~ =i* PP~ PP~ Sample Description LOR 0.02 0.005 0.005 0.005 0.001 0.2 0.01 2 10 10 0.5 2 0.01 0.5 1 Uo:NORTHGATE EXPLORATION age: 2 - B ALS Chemex KEMESS MINE Total # Pages: 4 (A - C) EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 3519 Finalized Date: 10-AUG-2004 ALS Canada Ltd. SMITHERS BC MJ2N0 Account NORTEX 212 Brooksbank Avenue North Vancouver BC V7J 2C1 Canada CA L S). Phone: 604 984 0221 Fax: 604 984 0218 Project: 4090 CERTIFICATE OF ANALYSIS VA04050715 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 Analyte Cu Fe Ga Hg K La Ma Mn Mo Na Ni P Pb S Unlts ppm PP~ X PP~ PP~ % PP~ % PP~ PP~ % PP~ PP~ PP~ % Sample Description LOR ( 1 0.01 10 I 0.01 10 0.01 5 1 0.01 I 10 2 0.01 1 'do:NORTHGATE EXPLORATION age: 2 - C AIS Chernex KEMESS MINE Total # Pages: 4 (A - C) EXCELLENCE IN ANALYTICAL CHEMISTRY Po Box 3519 Finalized Date: 10-AUG-2004 ALS Canada Ltd SMlTHERS BC WJ 2N0 Account NORTEX 21 2 Brooksbank Avenue North Vancouver BC V7J 2C1 Canada CA L Z) Phone: 604 984 0221 Fax: 604 984 0218 Proiect: 4090 CERTIFICATE OF ANALYSIS VA04050715 Method Analyte Units Sample Description LOR r""*i bra:NORTHGATE EXPLORATION ALS Chemex KEMESS MINE EXCEUENCE INANALYTICAL CHEMISTRY PO BOX 3519 Finalized Date: 10-AUG-2004 ALS Canada Ltd SMITHERS BC WJ 2N0 Account NORTEX 212 Brooksbank Avenue North Vancouver BC V7J 2C1 Canada Phone: 604 984 0221 Fax: 604 984 0218 Project: 4090 CERTIFICATE OF ANALYSIS VA04050715 I MeYhod WEI-21 AU-AA23 AU-AA23 AU-AA23 CU-AA49 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 Analyte Recvd Wt. Au AuCheck Au Check Cu k Al As B Ba Be Bi Ca Cd Co Units ka PP~ PP~ PP~ Y' PP~ 36 PP~ PP~ PP~ PP~ PP~ X PP~ PP~ Sample Description LOR 0.02 0.005 0.005 0.005 0.001 0.2 0.01 2 10 10 0.5 2 0.01 0.5 1 0.26 0.096 0.006 1.6 0.78 14 Units ppm PP~ PP~ % PP~ PP~ PP~ PP~ PP~ Sample Description LOR 2 1 I 0.01 I0 I0 1 I0 2 '40:NORTHGATE EXPLORATION ,>ge: 4 - A KEMESS MINE Total # Pages: 4 (A - C) EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 3519 Finalized Date: 10-AUG-2004 ALS Canada Ltd. SMITHERS BC MJ2N0 Account NORTEX 212 Brooksbank Avenue North Vancouver BC V7J 2C1 Canada Phone: 604 984 0221 Fax: 604 984 0218 Project: 4090 CERTIFICATE OF ANALYSIS VA04050715 I Method WE191 AU-AA23 AU-AA23 AU-AA23 CU-AA49 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICW1 ME-ICP41 ME-ICP41 MElCP4l ME-ICP41 ME-ICP41 ME-ICP41 Analyte Recvd Wt. Au AuCheck Au Check Cu AS Al As 8. Ba Be Bi Ca Cd Co Units kg PP~ PP~ PP~ YO PP~ K PP~ PP~ PP~ PP~ PP~ *lo PP~ PP~ Sample Description LOR 0.02 0.005 0.005 0.005 0.001 0.2 0.01 2 10 10 0.5 2 0.01 0.5 1 0.26 0.107 0.040 2.0 1.06 8 C10 30 C0.5 C2 0.24 7.3 9 0.22 0.124 0.038 1.7 1.54 13 c10 40 C0.5 C2 0.42 3.5 10 0.28 0.064 0.026 1.1 1.90 7 40 70 0.6 <2 0.70 5.0 9 0.28 0.136 0.043 2.4 2.07 10 C1 0 80 c0.5 2 0.79 7.7 8 0.30 0.139 0.033 2.2 1.44 16 C10 40 C0.5 C2 1.06 3.2 13 0.24 0.023 0.003 0.7 1.60 17 el0 260 C0.5 C2 2.28 5.4 11 0.24 0.022 0.004 0.3 1.74 18 Method Analyte Units Sample Description LOR '30:NORTHGATE EXPLORATION Jpaage: 4 - c ALS Chernex KEMESS MINE Total # Paaes: 4 IA - Cl EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 3519 Finalized ~atcO-AUG-20G ALS Canada Ltd. SMITHERS BC WJ 2N0 Account NORTEX 212 Bmoksbank Avenue North Vancouver BC VIJ 2C1 Canada Phone: 604 984 0221 Fax: 604 984 0218 Project 4090 CERTIFICATE OF ANALYSIS VA04050715 I Method Analyte Units Sample Description LOR c2 4 61 0.03 c10 c10 53 c10 751 c2 7 58 0.13 c10 ~10 88 CERTIFICATE VA04050716 Project: 4090 P.O. No.: 279018 LOG-22 Sample login - Rcd wlo Barcode PUL-31 This report is for 101 Drill Core san-ples submitted to our lab in Vanmuver, BC, Canada on 3-AUG-2004. The following have access to data associated with this certificate: ANALYTICAL PROCEDURES CARL EDMUNDS RON KONST ALS CODE DESCRIPTION INSTRUMENT Au-PA23 Au 309 FA-AA finish Cu-AA49 Assay Cu - HBr Digestion ME-ICP41 34 Element Aqua Regia ICP-AES ICP-AES To: NORTHGATE EXPLORATION ATTN: CARL EDMUNDS KEMESS MlNE PO BOX 3519 SMITHERS BC VOJ 2N0 This is the Find Report and supersedes any preliminary report with this certificate number. Results apply to samples as Signature: LGC?.&SL.(,7 submitted. All pages of this report have been checked andapproved for release. &--- '40:NORTHGATE EXPLORATION ALS Chern~x 3age: 2 - A KEMESS MINE Total # Pages: 4 (A - C) EXCELLENCE lNANALY7'lCAL CHEMISTRY PO BOX 3519 Finalized Date: 9AUG-2004 ALS Canada ~td SMITHERS BC MJ2NO Account NORTEX 212 Brooksbank Avenue North Vancouver BC V7J 2Cl Canada (A L s) Phone: 604 984 0221 Fax: 604 984 0218 Proiect 4090 I CERTIFICATE OF ANALYSIS VA04050716 I Method WElPl AU-Am3 Cu-AA49 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-lCP4l ME-ICP41 ME-ICP41 ME-ICP41 Analyte Recvd Wt. AU Cu An A1 As B Ba Be Bi Ca Cd Co Cr Cu Units ks PP~ X PP~ % PP~ PP~ PP~ PP~ PP~ YO PP~ Sample Description LOR o~m PP~ PP~ 0.02 0.005 0.001 0.2 0.01 2 10 10 0.5 2 0.01 0.5 1 1 1 '0:NORTHGATE EXPLORATION >age: 2 - B ALS Chem~x KEMESS MINE Total # Paaes: 4 (A - C) I EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 3519 Finalized ~atc9-AUG-2004 ALS Canada Ltd SMITHERS BC WJ 2NO Account NORTEX 212 Bmoksbank Avenue North Vancouver BC V7J 2C1 Canada (A L s) Phone: 604 984 0221 Fax: 604 984 0218 Proiect: 4090 CERTIFICATE OF ANALYSIS VA04050716 I I ME-ICP41 ME-ICP41 ME-lCP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 Analyte Ga Hg K La Mg Mn Mo Na Ni P Pb S Sb Sc I Units % PD~ porn % PP~ 7'0 PP~ PP~ Yo PP~ PP~ PP~ Yo PPm PP~ Sample Description LOR O.O1 10 1 0.01 10 0.01 5 1 0.01 1 10 2 0.01 2 1 '40:NORTHGATE EXPLORATION 3age: 2 - C KEMESS MINE Total # Pages: 4 (A - C) EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 3519 Finalized Date: 9-AUG-2004 ALS Canada Ltd. SMITHERS BC WJ 2NO Account NORTEX 212 Brooksbank Avenue North Vancouver BC V7J 2C1 Canada Phone: 604 984 0221 Fax: 604 984 0218 Project: 4090 CERTIFICATE OF ANALYSIS VA04050716 I 1 Method ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 Analyte Sr Ti TI U V W Zn Units % DDm DD~ PD~ DD~ DD~ Sample Description LOR 1 0.01 10 10 1 10 2 i 50: NORTHGATE EXPLORATION J~age: 3 - A ALS Chemex KEMESS MINE Total # Pages: 4 (A - C) EXCELLENCE IN ANALWICAL CHEMISTRY PO BOX 3519 Finalized Date: 9-AUG-2004 ALS Canada Ltd. SMITHERS BC WJ 2N0 Account NORTEX 212 Brooksbank Avenue North Vancouver BC V7J 2C1 Canada Phone: 604 984 0221 Fax: 604 984 0218 Proiect: 4090 CERTIFICATE OF ANALYSIS VA04050716 I Method WEI-21 Au-AA23 CU-AA49 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 Analyte Recvd Wt. Au Cu AS Al As B Ba Be BI Ca Cd Co Cr Cu Units kg PP~ % PP~ x vpm PP~ DP~ PP~ PP~ % PP~ PP~ PP~ PP~ Sample Description LOR 0.02 0.005 0.001 0.2 0.01 2 I0 10 0.5 2 0.01 0.5 1 1 1 0.26 0.128 0.005 2.1 0.42 5 Method ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-lCP4l ME-ICP41 ME-ICP41 ME-ICP41 Analyte Fe Ga HS K La Mg Mn Mo Na Nl P Pb S Sb Sc Units Of0 PP~ mpm X PP~ % PP~ PP~ % PP~ PP~ PP~ % PP~ Ppm Sample Description LOR 0.01 10 1 0.01 10 0.01 5 1 0.01 1 10 2 0.01 2 I 21 0430 3.91 Method Units Sample Description LOR 228 cO.01 10 C10 8 229 0.09 21 9 0.04 ' C10 40 29 i Method WEl-21 Au-AA23 CU-AA49 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 Analyte Recvd Wt. Au Cu A9 Al As B Ba Be Bi Ca Cd Co Cr Cu Units ks PP~ PP~ YO PP~ PP~ DP~ Sample Description LOR PP~ PP~ % PP~ PP~ PP~ PP~ 0.02 0.005 0.001 0.2 0.01 2 10 10 0.5 2 0.01 0.5 1 1 1 0.22 0.018 0.002 0.4 1.24 4 c10 90 cO.5 2 3.06 2.1 7 49 17 0.28 CO.005 0.002 C0.2 1.20 <2 Method ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 MEICP41 ME-lCP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-lCP41 Analyte Fe Ga Ha K La Mg Mn Mo Na Ni P Pb S Sb So Units X PP~ PP~ % PP~ X PP~ PP~ % PP~ PP~ PP~ Yo PP~ PP~ Sample Description LOR O.Ol 10 I 0.01 I0 0.01 5 I 0.01 1 10 2 0.01 2 1 I 'do:NORTHGATE EXPLORATION KEMESS MINE Total # Pages: 4 (A - C) EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 3519 Finalized Date: 9-AUG-2004 ALS Canada Ltd. SMITHERS BC WJ 2N0 Account NORTEX A 21 2 Brooksbank Avenue Norlh Vancouver BC V7J 2C1 Canada (A L Z) Phone: 604 984 0221 Fax: 604 984 0218 Project: 4090 CERTIFICATE OF ANALYSIS VA04050716 1 Method ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 Anelyte I Sr Ti TI U V W Zn Units % DD~ DP~ DP~ PP~ ISample Description LOR 'Om 1 0.01 10 10 1 10 2 I k . '&TO: NORTHGATE EXPLORATlON 3 Page: 1 ALS Chemex KEMESS MlNE Finalized Date: 21-SEP-2004 EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 3519 Account: NORTEX ALS Canada Ltd SMITHERS BC VOJ 2N0 212 Brooksbank Avenue A NO" Vanmuver BC WJ 2CI Canada (A Phone: 604 984 0221 Fax: 604 984 0218 CERTIFICATE VA04060944 SAMPLE PREPARATION ALS CODE DESCRIPTION Project: 4090 MI-21 Received Sample Weight P.O. No.: 279018 LOG-22 Sample login - Rcd wlo Barcode PUL-32 Pulverize 1000g to 85% c 75 um This report is for 21 Drill Core samples submitted to our lab in Vancouver, BC, Canada on 10-SEP-2004. BAG-01 Bulk Master for Storage The following have access to data associated with this certificate: CARL EDMUNDS RON KONST ANALYTICAL PROCEDURES ALS CODE DESCRIPTION INSTRUMENT ME-XRFOG Whole Rock Package - XRF OA-GRAOG LO1 for ME-XRFOG WST-SIM ME-XRFO5 Trace Level XRF Analysis To: NORTHGATE EXPLORATION ATTN: CARL EDMUNDS KEMESS MlNE PO BOX 3519 SMITHERS BC VOJ 2N0 /---7 This is the Final Report and supersedes any preliminary report with this certificate number. Results apply to samples as Signature: 9922>52-c5F- submitted. Ail pages of this report have been checked and approved for release. Method WEI-21 ME-XRFO6 ME-XRFO6 ME-XRFOG ME-XRFO6 ME-XRFO6 ME-XRFO6 ME-XRFOG ME-XRFO6 ME-XRFO6 ME-XRFO6 ME-XRFO6 ME-XRFO6 ME-XRFO6 ME-XRFO6 Analyte Recvd Wt. SiO2 A1203 Fe203 CaO MgO Na2O K2O Cr203 Ti02 MnO PZ05 SIO BaO LO1 Units kg % Y. % Ye % X *A Yo -10 -10 Yo D/. Ym % Sample Description LOR 0.02 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.98 46.12 15.08 7.81 8.45 4.11 1.66 0.85 <0.01 0.59 0.22 0.25 0.03 0.06 13.40 0.88 48.48 17.24 10.71 6.41 2.75 2.27 0.78 0.01 0.99 0.1 5 0.22 0.05 0.03 9.41 0.44 61.58 15.05 7.62 1.79 2.59 1.09 1.58 eO.01 0.67 0.07 0.15 0.02 0.06 6.91 0.92 69.39 12.24 7.56 1.16 0.57 0.03 2.82 <0.01 0.40 0.01 0.11 0.03 0.12 3.64 0.54 58.51 13.85 6.89 4.61 1.43 0.04 1.73 <0.01 0.44 0.07 0.18 0.01 0.03 10.30 0.78 62.50 14.35 5.78 2.32 1.77 0.07 2.78 X0.01 0.44 0.06 0.18 0.01 0.05 8.12 0.62 41.04 11.95 9.31 11.47 8.03 0.81 0.81 0.04 0.79 0.25 0.18 0.04 0.03 13.85 1.16 59.86 17.55 7.92 0.06 0.92 0.40 4.93 <0.01 0.71 0.04 0.27 0.01 0.10 5.35 0.82 61.30 17.44 5.63 1.38 1.65 3.03 3.90 <0.01 0.64 0.31 0.29 0.06 0.17 3.04 P '40:NORTHGATE EXPLORATION aage: 2 - B ALS Chemex KEMESS MINE Total # Pages: 2 (A - B) EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 3519 Finalized Date: 21-SEP-2004 ALS Canada Ltd. SMITHERS BC VOJ 2NO Account: NORTEX 212 Brooksbank Avenue North Vancouver BC WJ 2C1 Canada Phone: 604 984 0221 Fax: 604 984 0218 Project: 4090 CERTIFICATE OF ANALYSIS VA04060944 Method ME-XRFOB ME-XRFOS ME-XRFOS ME-XRFOS Analyte Total Nb Y Zr Units Yo PP~ PP~ PP~ Sample Description LOR 0.01 2 2 2 98.64 3 19 63 99.49 3 17 56 99.18 5 13 85 98.09 7 6 81 98 08 7 16 87 n 'GO:NORTHGATE EXPLORATION 3Page: 1 ALS Chemex KEMESS MlNE Finalized Date: 19-SEP-2004 EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 3519 Account: NORTEX ALS Canada Ltd. 1 SMITHERS BC VOJ 2N0 212 Brooksbank Avenue North Vancouver BC V7J 2C1 Canada Phone: 604 984 0221 Fax: 604 984 0218 CERTIFICATE VA04060945 I SAMPLE PREPARATION ALS CODE DESCRIPTION Project: 4090 WEI-21 Received Sample Weight P.O. No.: 279018 LOG-22 Sample login - Rcd wlo Barcode PUL-31 Pulverize split to 85% <75 um This report is for 26 Drill Core samples submitted to our lab in Vancouver, BC, Canada on 9SEP-2004. The following have access to data associated with this certificate: ANALYTICAL PROCEDURES CARL EDMUNDS RON KONST ALS CODE DESCRIPTION INSTRUMENT I Au-AA23 Au 309 FA-AA finish Cu-AA49 Assay Cu - HBr Digestion ME-ICP41 34 Element Aqua Regia ICP-AES ICP-AES To: NORTHGATE EXPLORATION ATTN: CARL EDMUNDS KEMESS MlNE PO BOX 3519 SMITHERS BC VOJ 2N0 ./--3< ,-- ,,/ --7 This is the Final Report and supersedes any preliminary report with this certificate number. Results apply to samples as signature: ~%j&:~,~~:~+.. submitted. All pages of this report have been checked and approved for release. C--__-- '\f@+- x"ii60:NORTHGATE EXPLORATION '2ge:2 - A ALS Chemex KEMESS MINE Total # Pages: 2 (A - C) EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 351 9 Finalized Date: 19-SEP-2004 ALS Canada Ltd. SMITHERS BC VOJ 2N0 Account: NORTEX 212 Brooksbank Avenue North Vancouver BC V7J 2C1 Canada Phone: 604 984 0221 Fax: 604 984 0218 Project: 4090 CERTIFICATE OF ANALYSIS VA04060945 ~e~~odWEI-21 AU-AAZ3 Cu-AA49 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME4CP41 ME-ICP41 ME-ICP41 Analyte I Recvd Wt. Au Cu AS At As B Ba Be Bi Ca Cd Ca Cr Cu Units ks PP~ 96 DD~ x PD~ pum mum PP~ DP~ pum DP~ uum PP~ Sample Description LOR 0.02 0.005 0.001 0.2 0.01 2 10 10 0.5 2 0.01 0.5 1 1 1 210501 0.26 0.008 0.005 C0.2 2.11 7 210501 3.67 10 c1 0.21 10 0.92 815 c1 0.06 8 920 5 0.14 42 8 212761 4.42 c10 1 0.44 1 'dro:NORTHGATE EXPLORATION ALS Chemex KEMESS MINE Total # Pages: 2 (A - C) EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 3519 Finalized Date: 19-SEP-2004 ALS Canada Ltd. SMITHERS BC VOJ 2N0 Account: NORTEX A 212 Brooksbank Avenue North Vancouver BC V7J 2CI Canada (A L Z) Phone: 604 984 0221 Fax: 604 984 0218 Project: 4090 CERTIFICATE OF ANALYSIS VA04060945 ' ME-ICP41 ME-ICP41 ME-ICP41 MEICP41 ME-ICP41 ME-ICP41 Analyte TL n U V W a "nits epm Yo epm pem DP~ PP~ PP~ Sample Description LOR 1 0.01 10 10 1 10 2 210501 56 0.15 I CERTIFICATE VA04062208 ALS CODE Project: 4090 P.O. No.: 279018 LOG-22 Sample login - Rcd wlo Barcode PUL-31 This report is for 100 Other samples submitted to our lab in Vancouver, BC, Canada on 13-SEP-2004. The following have access to data associated with this certificate: ANALYTICAL PROCEDURES CARL EDMUNDS RON KONST ALS CODE DESCRIPTION INSTRUMENT I Au-AA23 Au 30g FA-AA finish Cu-AA49 Assay Cu - HBr Digestion ME-ICP41 34 Element Aqua Regia ICP-AES ICP-AES To: NORTHGATE EXPLORATION ATTN: CARL EDMUNDS KEMESS MINE PO BOX 3519 SMITHERS BC VOJ 2N0 - This is the Final Report and supersedes any preliminary report with this certificate number. Results apply to samples as ;>*&sk ,2/k.,,/--7 Signature: I. -rZIy--~ submitted. All pages of this report have been checked and approved for release. d~-- wo:NORTHGATE EXPLORATION dage:2 - A ALS Chemex KEMESS MINE Total # Pages: 4 (A - C) EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 3519 Finalized Date: 23-SEP-2004 ALS Canada Ltd SMITHERS BC VOJ 2N0 212 Brooksbank Avenue Account: NORTEX North Vanmwer BC V7J 2Cl Canada (A L 5) Phone: 604 984 0221 Fax: 604 984 0218 Proiect: 4090 CERTIFICATE OF ANALYSIS VA04062208 I I Units kg DD~ % DDm % DDm DDm DDm DDm DD~ % DDm DD~ DDm ;ample Description LOR 0.02 0.005 0.001 0.2 0.01 2 10 10 0.5 2 0.01 0.5 I 1 1 210476 0.24 1.445 0.043 0.9 1.63 6 ~ethod ME-ICP41 ME4CP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP4I ME-ICP41 ME-ICP41 ME-ICP41 MGICP41 ME-lCP41 ME-ICP41 ME4CP41 ME-ICP41 ME-ICP41 Analyte Fe Ga Ha K La Mg Mn Mo Na Ni P Pb S Sb Sc Units % DP~ eem "/. eem % DP~ PP~ % eem eem mem 96 epm eem iample Description LOR O.O1 10 1 0.01 10 0.01 5 I 0.01 1 10 2 0.01 2 1 I ,i""--; \ ' km/ To: NORTHGATE EXPLORATION ALS Chemex KEMESS MINE Total # Pages: 4 (A - C) EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 3519 Finalized Date: 23-SEP-2004 ALS Canada Ltd. SMITHERS BC VOJ 2N0 Account: NORTEX 212 Brooksbank Avenue North Vancouver BC V7J 2C1 Canada Phone: 604 984 0221 Fax: 604 984 0218 Project: 4090 I CERTIFICATE OF ANALYSIS VA04062208 Method ME-ICP41 ME-ICP41 MEICP41 ME-ICP41 ME-ICP41 ME4CP41 ME-ICP41 Analyte Sr TI TI U V W ih Units % DD~ PP~ DP" PD~ PP" Sample Description I. 1 ':" 0.01 I0 I0 1 10 2 '40:NORTHGATE EXPLORATION. dage:3 - A ALS Chernex KEMESS MINE Total # Pages: 4 (A - C) EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 3519 Finalized Date: 23-SEP-2004 ALS Canada Ltd. SMITHERS BC VOJ 2N0 Account: NORTEX 212 Brooksbank Avenue North Vancouver BC V7J 2C1 Canada Phone. 604 984 0221 Fax. 604 984 0218 Project: 4090 CERTIFICATE OF ANALYSIS VA04062208 Method WEI-21 AU-AA23 CU-AA49 HE-ICP41 ME-ICP4I ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP4I ME-ICP41 Analyta Recvd Wt. Au Cu AS Al As B Ba Be Bi Ca Cd Co Cr Cu Units kg DDm 70 DDm % DDm DDm DD~ % DDm DD~ DD~ DU~ LOR Sample Description 0.02 0.005 0.001 0.2 0.01 2 I0 10 0.5 2 0.01 0.5 1 1 I -0: NORTHGATE EXPLORATION ALS Chernex KEMESS MINE Total # Pages: 4 (A - C) EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 3519 Finalized Date: 23-SEP-2004 ALS Canada Ltd. SMlTHERS BC VOJ 2N0 Account: NORTEX 212 Brooksbank Avenue North Vancouver BC V7J 2C1 Canada Phone: 604 984 0221 Fax: 604 984 0218 Project: 4090 CERTIFICATE OF ANALYSIS VA04062208 I Method 1 ME-lCP41 ME-15141 ME-lCP4I ME-lCP4l ME-lCP4I ME-lCP4I ME-1CP41 ME-lCP41 ME-lCP4l ME-lCP41 ME-lCP41 MMP4l ME-ICMl ME-lCP41 ME-lCP41 Analyte Fe Ga HSl K La Ms- Mn Mo Na Ni P Pb S Sb Sc Units Oh PP~ PP~ % DP~ % PD~ PP~ % PP~ PP~ PP~ Oh DP~ PP~ iampIe Description LOR 1 10 I 0.01 I0 0.01 5 1 0.01 I 10 2 0.01 2 I f--i NORTHGATE EXPLORATION ALS Ch~mex KEMESS MINE Total # Pages: 4 (A - C) EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 361 9 Finalized Date: 23-SEP-2004 ALS Canada Ltd. SMITHERS BC VOJ 2N0 Account: NORTEX 212 Brooksbank Avenue North Vancouver BC V7J 2C1 Canada Phone: 604 984 0221 Fax: 604 984 0218 Project: 4090 CERTIFICATE OF ANALYSIS VA04062208 I Units Sample Description LOR p, kdfo:NORTHGATE EXPLORATION 3age: 4 -A ALS r'h~mex KEMESS MINE Total # Pages: 4 (A - C) EXCELLENCE IN ANALWICAL CHEMISTRY PO BOX 3519 Finalized Date: 23-SEP-2004 ALS Canada Ltd. SMITHERS BC VOJ 2N0 Account: NORTEX 212 Bmoksbank Avenue North Vancouver BC V7J 2C1 Canada Phone: 604 984 0221 Fax: 604 984 0218 Project: 4090 CERTIFICATE OF ANALYSIS VA04062208 I ~ethod WEI-21 Au-AA23 Cu-AA49 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 MEICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 ME-ICP41 Analyte Recvd Wt. Au Cu As Al As B Ba Be Bi Ca Cd Co Cr Cu Units kg PP~ % PP~ % PP~ PP~ PP~ PP~ PP~ % PP~ PP~ PP~ PP~ Sample Description LOR 0.02 0.005 0.001 0.2 0.01 2 10 I0 0.5 2 0.01 0.5 1 1 1 o: NORTHGATE EXPLORATION age: 4 - B ALS Ch~rnex KEMESS MINE Total # Pages: 4 (A - C) EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 3519 Finalized Date: 23-SEP-2004 ALS Canada Ltd. SMITHERS BC VOJ 2N0 Account: NORTEX 212 Brooksbank Avenue North Vancouver BC V7J 2C1 Canada Phone: 604 984 0221 Fax: 604 984 0218 Proiect: 4090 CERTIFICATE OF ANALYSIS VA04062208 Method Analyte Units Sample Description LOR Ua:NORTHGATE EXPLORATION 4,e: 4 - C ALS Chernex KEMESS MINE Total # Paaes: 4 IA - CI EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 3519 Finalized ~ateT23-~~~-2004 ALS Canada Ltd SMITHERS BC VOJ 2N0 Account: NORTEX 212 Brooksbank Avenue North Vancouver BC V7J 2C1 Canada Phone: 604 984 0221 Fax: 604 984 0218 Project: 4090 CERTIFICATE OF ANALYSIS VA04062208 Method Anelyte Units Sample Description LOR ALS Chemex KEMESS MlNE Finalized Date: 29-s~~I2004 EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 3519 Account: NORTEX ALS Canada Ltd. SMITHERS BC VOJ 2N0 212 Brooksbank Avenue Norlh Vancouver BC V7J 2C1 Canada Phone: 604 984 0221 Fax: 604 984 0218 I CERTIFICATE VA04065708 I SAMPLE PREPARATION ALS CODE DESCRIPTION Project: 4090 FND-02 Find Sample for Addn Analysis P.O. No.: 279018 This report is for 117 Pulp samples submitted to our lab in Vancouver, BC, Canada on ANALYTICAL PROCEDURES 23-SEP-2004. ALS CODE DESCRIPTION INSTRUMENT The following have access to data associated with this certificate: ME-XRFO6 Whole Rock Package - XRF XRF CARL EDMUNDS RON KONST OA-GRAO6 LO1 for ME-XRFO6 WST-SIM To: NORTHGATE EXPLORATION ATTN: CARL EDMUNDS KEMESS MlNE PO BOX 3519 SMITHERS BC VOJ 2N0 ,,Ya7 ,a/:-.- This is the Final Report and supersedes any preliminary report with this certificate number. Resub apply to samples as Signature: ,/'CC12-K&&-. submitted. All pages of this report have been checked and approved for release. C..--_---- -0: NORTHGATE EXPLORATION KEMESS MINE Total # pages: 2 (A) EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 3519 Finalized Date: 29-SEP-2004 ALS Canada Ltd. SMITHERS BC VOJ 2N0 Account: NORTEX A 212 Brwksbank Avenue North Vancouver BC WJ 2C1 Canada (r~L s> Phone: 604 984 0221 Fax: 604 984 0218 Project: 4090 I CERTIFICATE OF ANALYSIS VA04065708 Method ME-XRFOB ME-XRFOB ME-XRFOB ME-XRFOB ME-XRFOB ME-XRFOB ME-XRFOB ME-XRFOB ME-XRFOB ME-XRFOB MEXRFOB ME-XRFOB ME-XRFOB ME-XRFOB ME-XRFOB Analyte SiO2 A1203 Fe203 CaO Mgo NaZO K20 Cr203 Ti02 MnO PZ05 SrO Eta0 LO1 Total I Units % % % % % Oh % Oh % % 56 % YO % Oh Sample Description LOR o.ol 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 iI 210683 55 66 14.92 5 83 4.80 1.62 3.17 2.58 C0.01 0.45 0.27 0 25 0 05 0.10 8.87 98.56 I I I I I 1 ~I I I I 3Page: 1 KEMESS MlNE Finalized Date: 6-OCT-2004 EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 3519 Account: NORTEX ALS Canada Ltd. SMITHERS BC VOJ 2N0 212 Brooksbank Avenue North Vancouver BC V7J 2C1 Canada Phone: 604 984 0221 Fax: 604 984 0218 1 CERTlFICATE VA04065709 1 SAMPLE PREPARATION ALS CODE DESCRIPTION Project: 4090 FND-02 Find Sample for Addn Analysis P.O. No.: 279018 This report is for 100 Pulp samples submitted to our lab in Vancouver, BC, Canada on ANALYTICAL PROCEDURES 23-SEP-2004. ALS CODE DESCRIPTION INSTRUMENT The following have access to data associated with this certificate: ME-XRFOG Whole Rock Package - XRF XRF CARL EDMUNDS RON KONST OA-GRAOG LO1 for ME-XRFOG WST-S IM To: NORTHGATE EXPLORATION ATTN: CARL EDMUNDS KEMESS MlNE PO BOX 3519 SMITHERS BC VOJ 2N0 xpa/--___I.----7 This is the Final Report and supersedes any preliminary report with this certificate number. Results apply to samples as Signature: -4-.b~~~;z+7-/y~ submitted. All pages of this report have been checked and approved for release. &------1 o: NORTHGATE EXPLORATION 3age: 2 - A KEMESS MINE Total # Pages: 2 (A) EXCELLENCE IN ANALYTICAL CHEMISTRY PO BOX 351 9 Finalized Date: 6-OCT-2004 ALS Canada Ltd. SMITHERS BC VOJ 2N0 Account: NORTEX A 212 Brooksbank Avenue No~hVancouver BC V7J 2C1 Canada (A I, s;) Phone: 604 984 0221 Fax: 604 984 0218 Project: 4090 CERTIFICATE OF ANALYSIS VA04065709 ~ethod ME-XRFOG ME-XRFOG ME-XRFOG ME-XRFOG ME-XRFOG ME-XRFOS ME-XRFOG ME-XRFOG ME-XRFOG ME-XRFOG ME-XRFOG ME-XRFOG ME-XRFOG ME-XRFOG ME-XRFOG Analyte SiOZ AIZ03 Fez03 CaO MgO Na20 KZO Cr7.03 Ti02 MnO PZ05 SrO EaO LO1 Total Units 96 % =% % % % % Oh Yo % X X % Oh 36 Sample Description LOR o.ol 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 210489 58.36 14.19 7.03 3.78 2.01 1.39 3.37 <0.01 0.45 0.28 0.24 0.03 0 08 8.75 99.96 Methodology " Y A sequence of samples, consisting of 10cm split core, were taken down hole BR-04-13 fiom 18.8111 to 267.7m. These were sent to ALS Chemex in Vancouver for major element oxide analysis by lithium borate fusion and X-ray Flourescence O(RF). This was followed by trace element analysis by the same method for the elements Nb, Y, and Zr. A further two samples from the bottom of hole BR-04-14 were analysed by same methods but performed on assay pulps, therefore a wider intercept is represented. The Le Bas et al. Total Alkali vs. Silica (TAS) discriminate plot (IUGS Classification) was used to clarify rock names for volcanics. Where silicic alteration is significant, results will be shifted from the true position on the diagram. A Floyd Winchester plot was generated to confirm the above. This log plot sets immobile elements ZrITiO2 vs NbN. Alteration should have little effect on these elements. Ratios were calculated for A1203lTi02 and ZrITi02, and then plotted by depth and lithology to check for variations in chemistry with depth. Results n Monzonites show considerable scatter in both major and trace elements. x. f Hazelton volcanics logged in BR-04-13 are remarkably flat in trace element ratios, but highly scattered in major elements presumably due to alteration changes in Si02. Two samples taken from intensely phyllic altered Takla volcanics at the base of BR-04- 14 have a major element AlITi oxide ratio similar to Hazleton volcanics from BR-04-13, suggesting they may be in fact the same unit. AIITi ratios are 3 1 and 33, much higher than the 12-15 range for Takla rocks at Kemess. No whole rocks have been taken from definitive Takla lithologies on the Brenda Property for comparison. Two samples taken from mottled unit at the base of BR-04-13 plot with the Hazleton volcanics in major oxides. It is therefore likely that this unit is not an altered intrusive as was previously interpreted. Trace element data for Hazleton and Black Lake Intrusives are remarkably coincident, strengthening the argument that the two are comagmatic. Samples are plotted in the following figures by hole and lithologic group as follows: B - Black Lake Intrusives (Monzonite) H - Hazleton Volcanics (Toodoggone Fm) T - Takla Volcanics Major Element Oxidesplotted under IUGS Classification. Hazleton rocks are highly scattered by the addition of silica during alteration. Black Lake Intrusives plot together at right, showing little alteration. The mottled unit at base of BR-04-13 (BR-04-13Mot) plots with Hazleton rocks to the left of the intrusives. Floyd Winchester Plot PHONOLITE tw TRACHYTE 0 TRACHYANDESITE ANDESITE gg ALKALINE BASALT BSNMPH SUBALKALINE BASALT 0.001 4 0.01 0.1 I 10 NbN + BR-04-13H Ise BR-04-13B Floyd Winchester Immobile element plot showing coincidence between Hazleton and Black Lake Rocks. BR-04-13 Zr/TiOZ by depth 100.0 150.0 200.0 Depth (m) Trace element Zircon by Titanium dioxide. Two samples furthest right are the mottled unit. Hazleton rocks do not show any variation with depth, while Black Lake rocks are quite erratic. 6 Northgate Minerals Corp. Brenda Property 2004 Analytical Quality Assurance Report Northgate Minerals Corp. November 19,2004 Ron Konst Page 1 of 6 6 Northgate Minerals Corp. Table of Contents 1 Quality Assurance Program Overview...... 3 2 Contamination - Blanks...... 3 3 Accuracy - Standards ...... 5 4 Precision - Duplicates ...... 5 5 Conclusions...... 6 Page 2 of 6 Northgate Minerals Corp. 0 I Quality Assurance Program Overview The Brenda 2004 analytical quality assurance program is included in the program implemented for Northgate's 2002 Kemess North drilling. The object of this program is to provide sound and accurate gold and copper analytical results for use in resource and/or reserve estimation of the deposits being evaluated by Northgate Minerals Corp. On-site sample preparation laboratory was established at Kemess Mine to complete the primary crushing (80% minus 10 mesh) on cut or split core samples of up to 2 m for NQ and 1.5 m for HQ. This program was implemented under the supervision of Bill Smith, Chief Assayer at Kemess. A total of 733 prepared samples, weighing approximately 250 grams, were submitted to ASLChemex Laboratory during the 2004 program. Quality control samples (blanks, duplicates and standards) were inserted into the sample stream at regular intervals such that 1 in 26 samples were submitted for control purposes. A total of 28 quality control samples were submitted during the 2004 program. This amounted to 3.8% of the entire population of samples submitted to ASLChemex. 0 At ASLChemex samples were pulverized to 90% minus 150 mesh and submitted for a Cu assay by AA and one assay-tonne gold fire assay with an AA finish. 2 Contamination - Blanks Contamination is the addition of unacceptable amounts of elements under investigation into a geological sample that is not contained in the original in-situ location of that sample. It can be monitored using samples that contain very low concentrations of the elements under investigation. This was accomplished through the use of blank material comprised of barren intersections of Hazelton Group basalt whole core selected by a Geologist. These blanks were inserted into the sample preparation stream to test for contamination in the crushing stage. Due to the unblended nature of this blank whole core material, a greater tolerance is allowed in the variability of the analytical results. The intended purpose of these samples is to identify significant contamination. A total of 7 blanks were submitted during the 2004 program amounting to 0.9% of the entire population of samples. Results of blank analysis over time are presented below. Page 3 of 6 f Northgate Minerals Corp. Figure 1: For gold there is 1 weak outlier outside statistical upper control limit of 0.05 g/t Au (mean plus 2 standard deviations) presented in table 1. For copper there are no samples outside the upper control limit of 0.02 % Cu. Table 1: Blilrzk {Irrtliers ALS Chemex QC results for certificate VA04062209 indicate one Ag result that was high but all other reported elements were within target limits. Review of ICP data indicates that sample 210603 matches other core blanks with the exception of Ag, As, Cu, Fe, and S. This would indicate that it is not likely a sample switch or extreme blank material variation, which would result in an ICP signature mismatch. This would also indicate that laboratory error in the gold reporting or a gold only contamination is not likely either. This outlier most likely represents minor contamination in the crushing stage as gold related to sulphide mineralization from adjacent samples, or a minor natural variation found in the "blank" core used. Since results do not indicate laboratory error and variance is not extreme, this batch (1 of samples was not re-run. Page 4 of 6 6 Northgate Minerals Corp. 3 Accuracy - Standards Accuracy is the degree to which an analysis approaches the true concentration of the material being sampled. The only way to examine this aspect of lab performance is by inserting standard reference material into the sample stream. For the 2004 program two standards were used and their results were monitored over time. The standards were not blind to the lab, as they arrived as pulps in a stream of -10 mesh crushed material. A total of 6 standards were submitted during the 2004 program amounting to 0.7% of the entire population of samples. Results of standard analysis are presented below. Table 2: For standard OXE-21 there is one weak outlier outside Rocklab's +I-2 SD control limits of 0.64 and 0.67 glt for gold and 0.0 and 0.01 % for Cu. Since results do not significant potential for 0 laboratory error this batch of samples was not re-run. Table 3: I iv~040484360 22/07/20041210284 1 1.21 1 0.001~tandardOXH-29 - - "-"" " "- " b~%4030716/"---29/07/2004 12 104 15 r 0.61 1 StandardOXH-29 I For standard OXH-29 there are two outliers outside calculated +I-2 SD control limits of 1.21 and 1.29 g/t for gold and 0.0 and 0.01 % for Cu. Since results do indicate significant potential for laboratory error this batch of samples was re-run. Results are pending. 4 Precision - Duplicates Field duplicates are used to monitor and measure combined preparation and analytical precision, which varies with grade. Due to the limited amount of sample submitted for this program, the 15 duplicate analyses are insufficient to make any quantitative conclusions regarding precision. However, the figures presented below indicate good reproducibility of both gold and copper B) assays. Page 5 of 6 Northgate Minerals Corp. 0 D g a e L+ 2% PI' 0'e a p a g Q?* 2 Oupl~cdeOuld haysgA Ouplictc Copper AssysH 5 Conclusions Analysis of seven blanks does not indicate any laboratory error or significant contamination. Five of six standards, submitted throughout the program, confirm that gold and copper analytical results are within acceptable error limits with respect to accuracy. The one exception is presently being confirmed by re-assay of a batch of 52 samples. Fifteen duplicate assays indicate good reproducibility of both gold and copper assays. Analytical work by ALSChemex provided sound and accurate gold and copper analytical results for the 2004 Brenda diamond drilling program. Page 6 of 6 '0 OOY 1% . *a I OQQ 8 s - - I u... . - I -- -.. - - . 8 .... -. m.. - .. x .- x... .- . ----I . . .. .Y- .;.> .%- 4; -.--A- -.--A- -- - .- .- I.,..~.- -~ - - 7