Geological Report on the Stump Lake Property Nicola Mining Division
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Geological Report on the Stump Lake Property Nicola Mining Division British Columbia N.T.S. 921/8W Latitude SO0 20’ N, Longitude 120° 20’ W Braniff Gold Corporation Suite 501- 905 West Pender St. Vancouver, B.C. V6C lL6 by Calvin Church, P.Geo. Vancouver, B.C. June 20,199s Summary The Stump Lake property is a polymetallic precious metal bearing high level epithermal showing located in the Nicola Mining Division (NTS 921/8W) in south central British Columbia. Silver rich veins were also mined for gold, lead and zinc, over short periods, from the Mary Reynolds claim since 1889. Late Triassic volcaniclastic rocks belonging to the Nicola Group underlie the entire property and were accreated as pert of the Quesnelia Terrane which forms part of the Intermontane tectonic belt. The eastern facies of the Nicola group outcrops in the central and northern parts of the property and is represented by augite porphyritic flow and breccias. Mineralized quartz-carbonate sulphide veins in the Stump Lake camp are north trending, dip steeply east and contain abundant pyrite, galena, sphalerite and tetrabedrite. The mineralization on the property is aligned subparallel to north-northeast trending regional structures (Quilchena and Stump Lake Faults) which resulted from Tertiary extentional tectonism. Similar regional tectonic trends prevalent in Tertiary time are the primary cause of other deep-seated epithermal precious metal deposits in British Columbia. Anomalous soil geochemistry and Induced Polarization geophysical surveys have been successful in outlining mineralized veins on the property. Braniff Gold Corpration completed a soil geochemical survey over the centra1 portion of the claims in October 1997. Geotronics Surveys Ltd. was contracted to complete IP inversion (data reinterpretation) on data collected for Anglo American in 1989. The results of the groundwork and data reinterpretation are included as part of this report and form the basis for some of its conclusions. Indications from regional trends and observations of property surveys are that the mineralization at Stump Lake is related to high levels of an epitbermal system. Enrichment of gold is believed to occur at depth and future programs should be designed to explore for precious metals at depth. Further work should be directed to following up geophysical anomalies with deep penetration geophysics (ie Induced Polarization). A program of trenching and diamond drilling is recommended subject to favourable results obtained in geophysical and prospecting. TABLE OF CONTENTS Page No Summary i 1 .O INTRODUCTION 1 2.0 LOCATION, ACCESS AND’PHYSIOGRAPHY 1 3.0 CLAIM STATUS 1 4.0 HISTORY 2 5.0 REGIONAL GEOLOGY 3 5.1 Nicola Group 3 5.2 Nicola Horst 4 5.3 Mineral Occurrences 4 6.0 PROPERTY GEOLOGY 5 6.1 Lithological Sequence 5 6.2 Mineralization and Alteration 6 7.0 EXPLORATION PROGRAM (1997) 7 7.1 Soil Geochemical Sampling 8 7.2 Geophysical Inversion Modeling 9 8.0 CONCLUSIONS 10 9.0 RECOMMENDATIONS 11 10.0 STATEMENT OF COSTS 12 11 .O REFERENCES 13 v. Appendix I - Soil Geochemical Analysis LIST OF FIGURES . Page After No Figure 1: Location Map 1 Figure 2: Claim Map 2 ~ Figure 3: Regional Geology 3 Figure 3A: Legend-Regional Geology 3 Figure 4: Mineralized Showings/Zones 6 Figure 5a: Geochem Results Au (ppb) in pocket ‘I Figure 5b: Geochem Results Ag (ppm) Figure 5c: Geochem Results As @pm) ‘I ‘I Figure 5d: Geochem Results Cu (ppm) L‘ Figure 5e: Geochem Results Pb @pm) L‘ Figure Sf: Geochem Results Sb @pm) “ Figure Sg: Geochem Results Zn (ppm) “ . Map #21: Compilation Map r. LIST OF TABLES Page No Table I: Underground Development/Production 2 Table II: Soil Geochemical Data 8 1.0 INTRODUCTION The Stump Lake property is a polymetallic, precious metal bearing mineral occurrence located 38 kilometres southeast of Kamloops, British Columbia on NTS mapsheet 921/8W. Historically, small-scale production came from veins oriented subparallel or conjugate to prominent Tertiary fractures, such as the Stump Lake and Quilchena faults. Quartz-carbonate veins which host the mineralization are epithetmal to mesothermal in character and contain principally pyrite, chalcopyrite, galena, sphalerite and tertrabedrite and less abundant bomite, scheelite, arsenopyrite, pyrrhotite and native gold. Mineralization in the Stump Lake camp was emplaced contemporaneous with regional Tertiary faulting related to an extentional tectonic enviroment. The writer was retained by Braniff Gold Corporation to examine old reports on the property and compile recent soil geochemical data collected by them. Geotronic Surveys Ltd. was contracted to complete inversion modeling of IP and resistivity data collected in their survey for Anglo American Resources in 1989. This report summarizes mineral potential on the Stump Lake property and includes a compilation map of relevant data past and present. A portion of David Mark’s (Geotronic Surveys Ltd.) report on the IP inversion modeling is included. 2.0 LOCATION, ACCESS AND PHYSIOLOGY The property is located about 38 km south of Kamloops , B.C. and 3 km southeast of Stump Lake in the Nicola Mining Division (Figure 1). The geographical coordinates for the approximate centre of the property are at 50” 20’ north latitude and 120” 20’ west longitude. Access to the property is via Highway No. 5 from either Merrit or Kamloops to the junction with the Peter Hope Lake access road, 3 km south of Stump Lake. This gravel access road crosses the south boundary of the claims 3 km from the highway and from here a network of dirt roads access the northern parts of the claim block. Topography is generally rolling hills aligned north-northeasterly, parallel to regional geological structures, and range in elevation from 1000 metres to 1250 metres. Vegetation consists of moderately dense stands of pine and fir trees with little underbrush. There are several grassland areas used for grazing cattle at the present time. 3.0 CLAIM STATUS The property is described by three reverted crown-granted two post claims fully contained within three contiguous modified grid claims (Figure 2). In 1986 the owner grouped the Mary Reynolds and Gold Cup reverted crown grants and they were given the same record number. The claims are owned by Mr. Leo Loranger and were optioned to Braniff Gold Corp. of Vancouver, B.C. 4.0 HISTORY The first historical records of exploration activity are referenced in the 1887 Annual Report of the B.C. Ministry of Mines. The renowned exploration geologist G.M. Dawson examined the property in 1894. In 1889 small scale production (2 tonnes) was achieved from three shafts exploiting the same vein system on the Mary Reynolds claim. During the period 19 18- 19 19 considerable underground development work took place and a new r vein was discovered 45 metres west of the original vein. Production records indicate 117 tonnes of selected ore was shipped to the smelter from material that assayed 1753.4 g/tonne Ag (51.2 oz/t), 4.9 g/tonne Au (0.143 oz/t), 1.4% Pb and 2.4% Zn. Primary Ore Mining Company Ltd. completed further underground development and surface diamond drilling when they controlled the property from 1928-1934. This early development is summarized in the table below. Table I - Underground Development/Production ’ Production Year Shaft / Raises (fi) Drifting (fi) Tonnes Milled 1889 105 0 2 1917 - 1919 364 30 117 r 1928 - 1934 180 120 1967 17 Totals 649 150 136 r The property was dormant until 1972-1978 when Pine Valley Explorers Ltd. gained control and completed geochemical, geophysical and drilling programs. The company c had constructed a small mill and done minor underground rehabilitation when it ran out of funds in 1980. Again the property was dormant until Mr. Leo Loranger acquired portions of it in 1984 and carried out limited geochemical and VLF-EM surveys. The final claim package was assembled by Mr. Loranger in 1986 and in the following three years was optioned to Rochester Minerals Inc., Noranda Exploration Company Ltd., Diplomat Resources Inc. and Anglo American Resources Inc. Noranda carried out geological mapping, geochemical and geophysical surveys over large areas of the property. Diplomat Resources and Anglo American followed up some of the Noranda work with diamond drilling programs. In April 1989 Anglo American completed an IP survey across the south half of the property and drilled several of the anomalies. To date various companies have drilled 24 holes on the property for a combined total of 2840 metres of diamond drilling. 2 Braniff Gold Corp. completed further soil geochemical surveys and prospected areas in the northeast corner (C-Zone) of the property in 1997. Braniff also contracted Geotronics Surveys Ltd. to perform a reinterpretation of the IP and resistivity data using mathematical techniques (inversion modeling). Conclusions of the inversion modeling are included in this report along with computer generated plots of the resistivity and IP pseudosections. 5.0 REGIONAL GEOLOGY The Nicola Lake region lies within the accreted Quesnellia Terrane of the Intermontane Belt in southern British Columbia. The terrane is delineated on the east by the Okanogan Shear Zone (OSZ) where Eocene volcanics abut Paleozoic elastic and carbonate sedimentary rocks of the Omineca Terrane. Late Triassic arc volcanic rocks and volcanogenic sedimentary facies of the Nicola Group occupy the central area of the Nicola Lake region and have been subdivided into three belts by various workers (Schau 1968, Preto 1979 and McMillan 1981). The sequence is intruded by Triassic and Jurassic calcalkaline plutons of the Guichon Creek Batholith on the west. The major fault systems strike northwest and north to northeast; the former in part related to Mesozoic r contraction tectonics and the latter related to Tertiary extensional faulting. Eocene sedimentation was partly controlled by extensional faulting that predated the deposition r of Kamloops Group andesite and basalt.