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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  10-Feb-2003 by Ron McMillan (RHM)

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NMI
Name NEMRUD, JESSE, LUKE, MIKE, RILEY, SS Mining Division Clinton
BCGS Map 092P094
Status Prospect NTS Map 092P14W
Latitude 051º 58' 56'' UTM 10 (NAD 83)
Longitude 121º 14' 17'' Northing 5760527
Easting 621002
Commodities Copper Deposit Types K01 : Cu skarn
L03 : Alkalic porphyry Cu-Au
Tectonic Belt Intermontane Terrane Quesnel
Capsule Geology

The Nemrud bornite skarn is located 5 kilometres east of Peach Lake, approximately 24 kilometres northeast of Lac La Hache and is readily accessible from Highway 97 via a network of logging roads. The Nemrud showing is one of several copper showings which are part of the Spout Lake copper-gold district, a group of porphyry and skarn deposits associated with Upper Triassic to Lower Jurassic alkaline intrusive rocks of the Spout Lake intrusive suite.

The Nemrud grid is underlain by andesites, basalts, calcareous tuffs and argillites of the Upper Triassic Nicola Group (Assessment Report 25368). Nicola Group rocks are intruded by the Upper Triassic to Lower Jurassic Spout Lake Intrusive complex, an alkalic intrusive suite ranging in composition from pyroxenite through monzonite to syenite, and from batholithic size to small intrusive plugs, dikes and breccia bodies. Granodioritic rocks of the Triassic to Jurassic Takomkane Batholith intrude Nicola rocks east of the property. Outliers of alkaline plateau basalts of the Miocene to Pleistocene Chilcotin Group are present in the general area.

The skarn is developed near the east-dipping contact zone between volcanic rocks and overlying sedimentary/volcanic rocks, close to the contact with the Takomkane batholith. The skarn horizon consists of untercalated lenses of garnet-calcite-epidote skarn, sometimes containing diopside, intercalated with impure marble, intermediate to mafic tuffs and flows, and siltstone/greywacke. The main copper mineral is bornite with minor chalcopyrite and native copper. The skarn assemblage is between 20 and 25 metres in thickness with an average grade of 0.1 per cent copper, 0.03 grams per tonne gold and 1 gram per tonne silver and is developed within a north-northwest trending zone approximately 600 metres long and 100 metres wide. The "thickest" intersection of mineralisation (Assessment Report 24139) assayed 0.25 per centcopper over a 7.9 metre core length, with maximum gold and silver values of 140 parts per billion and 5.5 parts per million respectively. Weak porphyry-style mineralisatin is developed west of the skarn mineralization.

Interest in the Spout Lake area was triggered in 1966 when the Geological Survey of Canada released the results of a regional airborn magnetic survey which outlined an annular magnetic anomaly 10 kilometres in diameter in the Spout Lake area and which included the area underlying the Peach 1 occurrence. Subsequently in 1966 and 1967, Coranex Limited abtained anomalous results in follow-up stream sediment geochemical surveys and soil geochemical surveys in the area south of Peach Lake. Programs of geological, soil geochemical, magnetometer, induced polarization and prospecting surveys were undertaken in 1967 in the area south of Peach Lake, leading to the discovery of the Peach 1 and several other occurences. Asarco Exploration Company of Canada Limited optioned the property in 1969. Amax Potash Limited optioned the property between 1971 and 1973 and completed programs of geological mapping, geophysics and percussion drilling. In 1983 and 1984, the Selco Division of BP Resources Canada Limited completed soil geochemical surveys on the Core group of claims which covered the property. G.W.R. Resources Incorporated acquired the property in 1988 and Asarco re-optioned the property and completed induced polarization surveys and percussion drilling in 1991. In 1993, G.W.R. Resources formed a joint venture with Regional Resources and have since completed programs of induced polarization and diamond drilling in 1994 and 1995.

There is no evidence of physical work at Nemrud prior to 1993 (Assessment Report 25368) other than a reference to work by Canadian Superior Exploration Limited on the RA claims located 3 to 10 kilometres east of Spout Lake, where "chalcopyrite and bornite occur disseminated in volcanic rocks" (Geology, Exploration and Mining in British Columbia 1971, page 335). Twenty diamond drill holes (1585 metres) were drilled in December/January 1994/95. Two additional holes totalling 392 metres were completed in August 1995.

Bibliography
EMPR GEM 1971-335
EMPR ASS RPT *24139, *25368
GSC MAP 1966-3, 1278A
GSC MEM 363
http://www.gwrresources.com

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