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File Created: 21-Feb-01 by Ron McMillan(RHM)
Last Edit:  21-Feb-01 by Ron McMillan(RHM)

Summary Help Help

NMI
Name CEDAR SKARN, G CLAIMS Mining Division Kamloops
BCGS Map 092P049
Status Showing NTS Map 092P08W
Latitude 51º 29' 31" N UTM 10 (NAD 83)
Longitude 120º 17' 31" W Northing 5708011
Easting 687991
Commodities Copper, Silver, Gold, Lead, Molybdenum Deposit Types K01 : Cu skarn
K08 : Garnet skarn
Tectonic Belt Intermontane Terrane Quesnel, Harper Ranch
Capsule Geology

The Cedar Skarn occurrence (Assessment Report 18597) is exposed in a roadcut on Highway 24, 10 (air) kilometres northwest of Little Fort.

The showing is exposed in a roadcut where highly faulted and skarn-altered limestones and associated silicified sedimentary rocks of the late Paleozoic Harper Ranch Group (Fieldwork 2000) are in contact with diorite, microdiorite and silicified greenstone of the Dum Lake Intrusive Complex. Two separate sulphide zones, each approximately 1 metre wide, are enclosed within silicified microdiorite and greenstone. The two zones are estimated to contain approximately 20 to 35 percent sulphides respectively, comprising veins, lenses and disseminations of pyrite, pyrrhotite and chalcopyrite. A one metre sample across the most sulphide-rich zone analysed 7328 ppm copper, 4.5 ppm silver, 580 ppb gold; a sample of the same width across the other sulphide zone yielded 6154 ppm copper, 4.2 ppm silver and 160 ppb gold. A selected sample assayed 11,474 ppm copper, 9.1 ppm silver and 1460 ppb gold (Assessment Report 13519).

The altered limestone exposed in the Highway 24 roadcut contains local lenses of heavily disseminated pyrrhotite-pyrite, with traces of chalcopyrite and molybdenite (Assessment Report 18597), associated with garnetiferous skarn. The limestone can be traced from Nehalliston Creek in the north to Eakin Creek and is sparsely mineralized with chalcopyrite and locally galena (Assessment Report 13519).

The Upper Triassic to Lower Jurassic Dum Lake complex is comprised of ultramafic and mafic plutonic rocks that could be part of an Alaskan-type intrusive body. The mafic portions of the Dum Lake complex are dominated by coarse to medium-grained gabbro and diorite but locally includes clinopyroxenite, monzogabbro, microdiorite and tonalite. The ultramafic portion of the Dum Lake complex includes an assemblage of variably serpentinized, locally talc and carbonate-altered rocks consisting of clinopyroxenite, wehrlite and dunite. The Dum Lake complex is truncated by granodioritic rocks of the Triassic to Jurassic Thuya batholith on its southeast side. On its eastward side, Dum Lake complex diorites and gabbros are in contact with massive andesites of the Upper Triassic Nicola Group and argillites, limestones and cherts of the late Paleozoic Harper Ranch Group (Fieldwork 2000).

The property was staked in 1985 by Craven Resources Incorporated. A program of geological mapping, soil geochemical sampling, panned stream sediment samples, lithogeochemical sampling, magnetic and VLF-EM surveying was carried out (Assessment Reports 13519 and 14477). In 1987, 21 kilometres of magnetic and VLF-EM surveying was completed by Craven Resources Incorporated. A prospecting program was completed by Pacific Comox Resources on the Cedar skarn in 1988 (Assessment Report 17709). Pacific Comox Resources completed 22 kilometres of magnetic and VLF-EM surveying in 1989 (Assessment Report 18612).

Bibliography
EMPR ASS RPT 13519, 14477, 16362, 17709, 18612, *18597
EMPR FIELDWORK 2000, pp. 1-30
GSC MEM 363
GSC MAP 1278A

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