REPORT ON PRELIMINARY GEOLOGY AND GEOCHEMISTRY OF THE ILGA CLAIM GROUP

CARlBOO MINING DIVISION Lat 52"45' Long 125"19' NTS 93C/11,14

FOR

KERR ADDISON MINES LTD.

OWNED BY KERR ADDISON MINES LTD.

By Peter Holbek Nov., 1983 TABLE OF CONTENTS

1. INTRODUCTION ~ Page 1.1 Location and Access 1 1.2 Claims and History 1 1.3 Physiography and Climate 4 1.4 Present Work 4

2. GEOLOGY AND MINERALIZATION 2.1 General Statement 2.2 Geology 2.2.1 Precaldera Assemblage 2.2.2 Dome Forming Assemblages 2.2.3 Intra Assemblage 2.2.4 Shield Forming Assemblage

2.3 Alteration and Mineralization

' 3. GEOCHEMISTRY 15 3.1 Methods 10 3.2 Discussion of Results 10

4. SUMMARY AND CONCLUSIONS 10

APPENDICES

I - Geochemistry Results 12 I1 - Analytical Techniques 14 111 - Statement of Costs 15 IV - Statement of Qualifications 16 LIST of FIGURES

Figure 1: Location Map for Ilga Claims Page 2 NTS 93 C 11, 14

Figure 2: Location Plan, Ilga Claims Page 3 Scale 1:50,000

Figure 3: Ilga Claims - Geology - in Pocket

Figure 4: Ilga Claims - Geochemistry - in Pocket 1. INTRODUCTION 1.1 Location and Access

The Ilga claims are located four km south of Far Mtn., near the center of the Ilgachuz Range, at Latitude 52"45' and Longitude 125"19' (see Figures 1 and 2). The area is covered by 1:50,000 N.T.S. map sheets 93C/ll and 93C/14, and is within the Cariboo Mining Division. Access to the property is by helicopter from either Hagensborg, 96 kms to the west, or from , 33 kms to the south. Helicopter bases are located at Hagensborg (Trans- west) and 70 kms south of Anahim Lake at Bluff Lake ( Saddle Air Services Ltd. ) . Both Hagensborg and Anahim Lake have airports with scheduled flights to by Air B.C. and Wilderness Airlines Ltd. '

1.2 Claims and History

The Ilga claim group is comprised of 68 units in four claims (see Fig. 2) and is owned by Kerr Addison Mines Ltd. Claim data is summarized below. There is no record of previous claims or mineral explor- tion in the Ilgachuz range.

Table 1. Ilga Group Claim Data

CLAIM NAME CWNER UNITS DATE LCCATED DATE RECORDED RECORD NO.

Ilga 1 Kerr Addison 20 May 28,1983 June 23,1983 4g36(6)

Ilga 2 20 I, I, I, I, I, 4938(6)

Ilga 3 20 I, ,I I, I, I, 4937 ( 6)

Ilga 4 8 May 27,1983 " I* I, 4939(6)

-1- N Figure 1: Location Map for the Ilga Claims, NTS 93C/11+14. Cariboo Mining Divi'sion I

1.3 Physiography and Climate

The Ilgachuz range is situated on the western edge of the near its contact with the Coast Mountains. The range is a product of moderate erosion of a large Tertiary shield . Much of the property is zbove tree line with elevations ranging from 1615 to 2230 metres. Good outcrop exposures are mostly restricted to the higher elevations as much of the area is composed of moderate to steep talus slopes. Valleys are filled with deep colluvial material and forested with Ponderosa Pine and subalpine Fir.

The climate is cool and dry; typical of higher eleva- tions of the .

1.4 Present Work

A four man crew spent four days on the property prospec- ting, mapping and sampling from June 15 to 18. Forty soil and rock samples were collected and analyzed for Au, Ag, Sb, and As. An additional 12 samples collected subsequent to staking on May 28th were analyzed by multi- element I.C.P. techniques. Mapping was done at the 1:10,000 scale but is very preliminary in nature. Prospecting and sampling covered an area of about 16 square kms.

2. GEOLOGY AND MINERALIZATION 2.1 General Statement

Lithologies and geological structures were recorded during prospecting traverses but no attempt was made to follow and map out contxacts in the field. The map(Fig.3) included in this report is a preliminary attempt to fit field data into a geological framework. Data were reinter- preted in light of recent investigations by Soutkm(1984)* 2nd the author is grateful for his helpful advice.

* GSC Paper 84-1A Report of Activities

4- 2.2 Geology

The Ilgachuz range is a moderately eroded,. multivent, peralkaline formed by two chemically distinct magmatic episodes; and early complex series of and eruptions, and late extrusion of a series of flows. Numerous lithologies have been subdivided by Souther (1984) into six assemblages on the basis of their morphology and age relative to construction of the shield and subsequent collapse and filling of the central caldera. Utilizing Souther's grouping and nomenclature, the more significant lithologies will be discussed below.

2.2.1 Precaldera Assemblage

The best exposure of this unit is on the east side of Pipe Organ Peak (Fig. 3) where it consists of a bedded pile over 300 m thick of weakl~y consolidated, moderately to intensely altered, pyroclastics, flows and sediments of uncertain origin. Colours range from mottled to , yellow, ochre, and white depending upon original lithology and degree of alteration. Most primary textures have been obliterated by alteration but occasionally faint flow banding or bedding can be observed. A green - breccia composed of fragments, crystals and minor debris is still recognizable at a number of localities.

The recessive nature of this assemblage results in limited exposure due to burial by talus from above; conse- quently, when it does outcrop it produces conspicuous color anomalies in contrast to surrounding dark comendite and basalt talus.Bleached white and yellow kaolinized material is typically found near and around rhyolite domes and plugs. There is -no association between anomalous geochemistry and alteration within this assemblage.

A rusty weathering (pyritic?) rhyolite breccia or lahar (or recent limonite cemented debris) is often encountered at low elevations in stream beds below or within the altered units. Although no clear contact relationships were observed, an unconformable contact is suspected and therefore this unit is not included in the Precaldera Assemblage.

2.2.2 Dome Forming Assemblages

These assemblages include most of the rhyolite domes, related flows and the Ilgachuz Comendite. The northerly domes are subcircular talus mounds of plate sized pieces of I~i~cjht to dark grey, slightly porphyritic, flowbanded rhyolitz with minor . Flowbands are 0.5 to 4.0mm thick and, where observed in outcrop, have moderate dips. Massive to banded chalcedony blobs and veinlets are associated with these domes. The southern domes are slightly different in character, consisting of intrusive and extrusive phases of cream colored porphyries. The Sax Dome consists of an upper section of cream colored, aphanitic to fine quartz porphyry felsite with odd green glass filled fractures, and a lower section of microsyenite with red and green glassy zenocrysts. Rhyolite similar to the upper Sax Dome may host the Caliope mineralization.

The Ilgachuz Comendite consists of large, massive, sometimes jointed flows and breccias of yellow-green to brown trachyte. Thick, jointed, dark weathering flows can be easily mistaken for if not examined closely. This unit overlies all of the previous mentioned units and forms most of the peaks and ridges in the south-central part of the range.

-6- 2.2.3 Intra Caldera Assemblage

Three units make up this assemblage and are. best exposed on the north edge of the caldera as documented by Souther(1984). The lower unit, indicative of caldera formation, is an epiclastic boulder-landslide deposit, crudely bedded and dipping into the caldera. Souther describes it as a chaotic, fragment supported, unsorted jumble of angular to sub- rounded comendite and minor basalt clasts as large as three metres. Similar material, grading up into finer debris flows and possibly lahars, has been tentatively identified in the col~between Phacelia Pk. and Caliope Mtn. suggesting this areaas the southern edge of the caldera. Alternatively, largely unsorted breccia and debris deposits exist on the ridge north of Saxifraga Peak, possibly indicating the main,or a subsidiary, caldera edge.

A thin bedded, dark grey to black, finely laminated vitric tuff that resembles a glassy shale is exposed at the break in slope all around Pipe Organ Peak. This unit Ettains a maximum thickness of 30 metres and its waterlain texture implies the existence of a caldera lake. This unit was not observed in the southern area of the proposed caldera.

The uppermost intracaldera unit is made up of thick flows and domes(?) of coarse to medium grained feldspar porphyry trachyte. Pipe Organ Peak (informally named because of a stunning array of massive columns on its precipitous south face) represents a thick and rapid accumulation of ponded flows. Caliope Mtn. appears to be, in part,

a finer grained intrusive ~ equivalent.

-1- 2.2.4 Shield Forming Assemblage

The Shield Forming Assemblage consists of a series of basalt and minor comendite eruptions, and is best exposed on Far and Scot Mtns. It appears that basalts issued from fissures primarily located peripheral to the caldera(s). Brick red cinder deposits may be a late phase of this assemblage.

2.3 Alteration and Mineralization

Large areas of the Precaldera Assemblage and some of the are hydrothermally altered but devoid of any mineralization. Alteration is dominantly kaolinization, and is most intense in areas surrounding rhyolite and trachyte domes and intrusions. Silicification is conspicuously absent. Only three areas of mineralization warrant further description.

In the area between Caliope Mtn. and Phacelia Pk. there are a number of small, brightly colored gossans. Gossans are due to thin ,dark,quartz-pyrite stringers within cream colored, variably altered felsite. In some areas the felsite has been brecciated, leaving angular, slightly altered , fragments set in a pyrite matrix. Size of the mineralized zone is uncertain as it is only exposed on the edges of a rock glacier but large ferricrete deposits at the toe of the glacier suggest substantial quantities of pyrite. Samples from this area yielded weak to very weak geochemical anomalies in silver, arsenic, antimony and qold.

-8- On the southeast flank of Pipe Organ Pk. is a strongly bleached zone surrounding a feldspar porphyry, plug. The bleached zone is cut by a dyke from 1 to 2m wide of loosely cemented breccia. Fragments are angular blocks of trachyte, comendite and minor amounts of tuffaceous material from 1 to 20cms in size, and are cemented by a thin veneer of silica. A few of the numerous open spaces and vugs contain small crystals of fluorite and pyrite. The highest arsenic and antimony results (220 ppm.7.6 ppm) for the property were obtained from this brecia.

The MG zone is located on the western edge of the property, north of Campanula Pk. A deeply incized gully hosts rusty breccias, barren quartz and jasper veins and a small clay alteration zone. The breccia is composed of weakly cemented, chaotic angular polylithic fragments. Some of the fragments may be basement rocks. Approximately 75 m across and eliptical in plan, the breccia may have a pipe like morphology. Adjacent to the breccia is a brown weathering, sheeted, crystal porphyry rhyolite. Sheets dip steeply to the east and are separated by thin layers of limonite and carbonate. Above this, veins of jasper and milky quartz are hosted by intensely clay-sericite altered porphyritic rocks. Unaltered volcanics peripheral to mineralization have chalcedonic anygdules. In spite of interesting lithologies and alteration thereis no geochem- ical response (except Mo) from this area.

-9- 3. GEOCHEMISTRY

3.1 Methods

Rocks were collected as "grab samples", generally comprising one to two kgs of material, in standard plastic bags. As there is very little soil development in the area "soil" samples were composed of talus fines and lateritic material and collected from within 20cm of surface in standard kraft bags. All samples were analyzed for Au,Ag,As and Sb by Chemex Labs Ltd. except for an earlier sample suite that were analyzed for Au,Ag,Hg,S and 30 element I.C.P. by Acme Analytical Ltd. Results are tabulated in Appendix I and plotted on Figure 3. Analytical details are given in Appendix 11.

3.2 Discussion of Results

Results were essentially negative; indicating only marginal enrichments of arsenic and antimony in two mineral- ized zones. Levels of enrichment were low enough to be a consequence of ordinary volcanic processes rather than a mineralizing hyrdothermal system. Statistical evaluation is deemed unnecessary.

4. CONCLUSIONS

The Ilgachuz range is a moderately eroded peralkaline shield volcano that formed during late Tertiary time. An early rhyolite-trachyte-comendite composite dome was built upon bedded pyroclastics, flows and sediments that were extensively altered by continued volcanic activity.

- 10 - Possible evacuation of a high level, differentiating, chamber resulted in the collapse of one or more centrally located . The calderas were filled by debris from the walls, waterlain tuffs and voluminous trachyte domes and flows. A large shield was built by late stage fissure eruptions of basalt and minor comendite.

Rare mineralization is exposed along the caldera margin and within the caldera adjacent to late trachyte-rhyolite intrusions. Very weak enrichments of arsenic and antimony are associated with mineralization, whereas quartz, mercury and precious metals are conspicuously absent. Mineralization is likely the result of ordinary volcanic processes and of questionable economic significance.

- 11 - CHEffEX LABS LTD. - REPDRT OF ANRLYTICAL RESULTS Surmarr of IGlIT sawirr ciient : XEAR ADDJ50N HINES LTD. IATTN: RRY DUJRRDIN) 703-1112 UEST PENDER ST. VANCOUVER, E.C. V6E 251

Sample 43 AS Sb description PPI PPI PPI

DE?-IGA I 0.1 1 0.2 RB?-IGA 2 1.8 23 2.6 R83-IGR 3 0.2 3 1.6 RE3-IGA 4 0.2 12 1.0 EB3-JGR 5 0.1 3 2.2 H83-IGA 6 0.1 3 1.4 R83-IWL 7 0.1 135 1.4 R83-IGA 9 0.2 2 I .o k83-IGE 5 0.I 5 1.0 R83-IGE 6 0.1 14 0.8 RE3-IGB 7 0.3 15 1.0

DE3-iGF 1 0.1 2 0.2 DB3-IGF 2 0.2 2 0.4 D83-IGF 3 0.1 3 0.4 R83-JGF 4 0.1 24 1.6 D83-IGF 5 0.1 14 0.6 DK-IGF 6 0.1 4 0.4 D83-IGF 7 0.I 22 0.8 D83-IGF E 0.1 4 0.2 D83-IGF 9 0.1 5 0.4 RE3-IGF 10 0.1 El 3.0 DWIGF 11 0.1 3 0.2 DBZ-IGF 12 0.1 9 0.6 DE3-IGF 13 0.1 5 0.6 R83-1GF 14 0.1 6 0.6 RE3-IGF 15 0.3 4 0.8 fi83-IGF 16 0.1 5 0.8

D63-IGP 13 0.1 71 2.6 Tt83-IGP 14 0.2 43 1.2 hB?-IGP 15 0.1 45 1 .Z DB3-IGP 16 0.4 160 2.4 RB3-IGP 17 0.1 48 1 .B D83-IGP 18 0.3 35 1.9 R83-IGP 19 0.1 36 1.0 D83-IGP 20 0.1 5 0.6 D83-IGP 21 0.2 3 0.6 DE5-IGP 22 0.1 2 0.2 D83-IGP 23 0.1 2 0.2 RE’-IGP 24 0.2 220 7.6 R83-IGP 25 0.1 37 1.2

CHEMEX

- 12 - ACflE ANALYTICAL LABORATORIES LTD. 852 E. HASTINGS, VANCOUVER B.C. PH:253-3158 TELEX:04-53124

ICP GEOCHEMXCFIL ANALYSIS

A ,500 6RAh SIIRPLE IS DI6ESIED YlTH 3 flL Of 3:1:3 HCL TO HMO3 TO H20 AT 90 DE6,C. FOR I HOUR. THE SAWLE IS DfLUTED 10 10 tfLS YlTH YATEA. THIS LEACH IS PARTIAL FOR: C~,P,Rq,~l,Ti,la,Mr,K,Y,B~,Si,Sr,CrAND B. k DETECTION 3 pp~. A61 AIIALYSIS BY AA. AU1 ANALYSIS BY AR FROtl 10 6RAH SAHPLE, H6J AliALYSIS BY FLAMELESS AA FROK.5OWRAH SAMPLE. ShHPLE TYPE - SOIL

DATE RECEIVED JUUE I 1983 DATE REPORTS tlAILED--&~@ aSSAY€R--A! DEAN TOYE, CERTIFIED B. C. C\SSAYER f KERR ADDISON FILE# 83-0675 PAGE H 1

SAWLE I Ho cu Pb In Hi As U AU Th Sr Cd Sb Bi v Cd P La Cr H9 Ba Ti E Al Ma K Y Au I HP s PPI PPI PPI PPI PP' PP' PPI PP' PP' PP' PPI PP' PPI PPI I I PP' pp1 I pp1 I pp1 1 1 I PPI P Pb PPb 1

083-IGP-2 ROCK 3 11 31 I 1 42 2.19 11 2 WD 2 1 1 2 3 ? .01 .01 I2 1 .01 1 .01 6 .21 .09 .34 2 5 20 ,BS D83 - I CP-3 u 6 24 169 2 3 361 11.72 21.2 ND 1 I 1 2 2 II .01 .06 62 I .oz 17 .OI 2 .89 ,I? .e5 2 5 70 D83- I CP-4 6 4 28 205 I I 386 2,64 62ND 7 2 I 2 2 2 .I6 .01 199 I .03 5 .Ol 4 ,40 .02 .I7 2 5 20 -01 083- I CP-5 7 3 19 227 1 2 818 1.05 12 2 ND 2 5 1 2 2 3 ,12 .02 lie I ,OJ II .OI 5 .7e .oz ,20 2 S 10 .Ol 083-1CP-6 5 4 15 134 I I 923 2.01 22MD 4 5 I 2 3 I .I6 .01 82 I .03 13 .03 3 .52 .02 .I0 2 5 IS .01 DBJ-IGP-7 RUCK 1 3 IJ u 2 2 169 1.73 42HD 5 3 I 2 2 I .01 ,01 156 1 .01 13 .01 3 .23 .06 .I1 3 S 30 .oi 083-ICP-8 6 10 II 137 I 5 855 7.15 10 2 ND 2 II I 2 2 17 .27 .I? 114 I .lo I7 .01 I .60 .01 .04 2 5 30 .01 D83-ICP-9 I 26 15 114 2 6 318 2.04 62ND 7 31 I 2 2 23 .(I -08 47 u .26 55 .02 4 1.04 ,02 ,I4 2 5 10 ,01 DBS-ICP-I 1 ROCK 1 4 9 15 3 2 Zb2 .99 42ND 2 7 I 2 3 2 .04 .01 3 I .03 20 .OI s .M .oz .oe 2 5 10 .Ol 8J16 S-B-01 2 3 I4 I52 2 2 1755 2.94 I2ND I 20 1 2 2 5 .(I .02 70 I ,08 24 ,04 ' 2 $97 .I8 .I3 2 5 40 .01

8116 e.o.-oz L8 b 20 221 I I 5.37 SQ2 WD 2 7 I 2 2 12 .09 ,ID 71 I -07 51 .01 4 1.64 .01 .D6 2 5 BO .04 STD A-1 I 30 42 179 35 I3 1018 2.87 P2UD 2 37 1 2 2 59 .64 ,I0 8 73 .76 267 .08 6 2.23 .01 .26 2 60 -

I

I Appendix 11

ANALYTICAL TECHNIQUES

All samples were prepared and analyzed by Chemex Labs Ltd. in North Vancouver, with the exception of 12 samples run for Au, As, S and 30 element ICP by Acme Analytical Ltd.

Soils were dried, sieved to -80 mesh prior to digestion Rocks were crushed and split, with a 300 gm subsample ring ground to -100 mesh. Prepared sample splits (10- 20 gm) were digested in nitric perchloric acid and analyzed by atomic absorption.

Silver assays were performed by fire assay with atomic absorption finish.

- 14 - APPENDIX I11 STATEMENT OF COSTS A. Prospecting, Sampling and Mapping May 28, June 15 to 18, 1983

P. Holbek Project Geologist 5 days @ $150/day $ 750. B. Helgason Geologist 5 days @ $12O/day 600. A. Chevalier Geologist 4 days @ $l4O/day 560. T. Fitzmurice Geologist 4 days @ $12O/day 480. $2,390.

B. Transportation

2 round trip Air Fare Vancouver-Anahim Lake $500. 2 1 way Air Fares Anahim Lake-VGcouver 250. Truck Rental 6 days @$4O/day 240. Gas 140.

1.5 days travel time for above personnel 795. Helicopter (White Saddle Air Services Bell 206B from Bluff Lake) 4.9 hrs @ $565/Hr incl. fuel & oil 2768. $4,693.

C. Supplies Food: 22 man days at $2O/day $440. Accomdation: 2 nights at Anahim Lake Lodge @ $75/night for 4 150. Radio, equipment rental and air photos 325. $915. D. Geochemical Analyses I1 ICP, Ag,Au, Hg and S Analyses plus sanple preparation $202. 40 Au,Ag, As, Sb Analyses plus sample preparation 668.

~ $870. E. Report Preparation Drafting, printing and report preparation $900.

TOTAL $9,768.

- 15 - Appendix IV

STATEMENT OF QUALIFICATIONS

I, Peter Holbek, with a business address of 703-1112 West Pender Street, Vancouver, B.C.

Hereby certify that:

1. I graduated from the University of B.C. in 1980 with a B.Sc. (Hons) Degree in Geological Sciences.

2. I have completed three years of post graduate research at the University of B.C.

3. I have worked as a Geologist or Assistant in B.C. for the past eight field seasons.

4. The work described herein is based on personal examination and supervision of field work carried out between July 10 and August 25, 1983.

Peter Holbek, /,B c.

- 16 -

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