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File Created: 18-Apr-86 by John Bradford(JB)
Last Edit:  18-Apr-08 by George Owsiacki(GO)

Summary Help Help

NMI
Name TP-MAIN, TEEPEE, TP 2,5,7,9,11, RACINE Mining Division Atlin
BCGS Map 104M067
Status Prospect NTS Map 104M10E
Latitude 59º 41' 25" N UTM 08 (NAD 83)
Longitude 134º 40' 48" W Northing 6616962
Easting 518015
Commodities Gold, Silver, Cobalt, Copper, Iron, Magnetite Deposit Types K03 : Fe skarn
Tectonic Belt Intermontane Terrane Stikine
Capsule Geology

The TP-Main showing, on the Teepee property, is located on the southwest side of Teepee Peak about 54 kilometres west of Atlin. The TP-Camp showing (104M 049) is 400 metres to the south and the TP-Central (104M 050) showing is 900 metres to the southeast. Access to the property is by helicopter from Altin.

The earliest exploration on the Racine property region dates back to the 1890s when prospectors travelling to the Klondike and Atlin goldfields prospected en route. The abandoned settlement of Teepee, just south of the property, was on the overland link between Atlin to the east and the Chilkoot Trail and White Pass railroad to the west. None of the early work, however, was documented in assessment records or Ministry of Mines Annual Reports. Old trenches and cabins are found in the area. Gold-cobalt skarn mineralization was discovered on the southwest face of Teepee Peak in 1982 by exploration geologists working for Trigg, Wollett Consulting Ltd. on behalf of Texaco Canada Resources Ltd. The TP claim was staked and a limited amount of prospecting, rock and stream-sediment geochemical sampling and reconnaissance geological mapping was completed on and around the claim. An exploration program on the TP mineral claim in 1983 by Trigg, Wollett Consulting Ltd. for Texaco focused on two occurrences termed the "Main showing and the "Camp showing". Work performed included geological mapping, trenching, sampling and ground geophysical surveys (magnetometer and VLF-EM). The company kept the claims in good standing but failed to continue work in this area until 1988, when Durfeld Geological Management Ltd. undertook geological, geochemical, and geophysical studies for the Main showing on behalf of Cyprus Gold Canada, which had optioned the property under a joint venture agreement. In 1988, Cyprus expanded the property and did follow up work on aeromagnetic anomalies. In 1989, prospecting, sampling, geochemical and geophysical surveys and 1371 metres of diamond drilling were conducted on the property. This work was mainly on the Crine (104M 081) veins to the north. In 1990, trenching, diamond drilling, prospecting and sampling was completed on the Crine veins and the UM (104M 084) vein was discovered to the southeast on the Add claims. Cyprus Gold Canada underwent a name change in 1991 to Cyprus Canada Inc., and subsequently sold 100% ownership of the TP mineral claim to Hemlo Gold Mines Inc. in June, 1993. In November 1993, Hemlo Gold Mines sold the TP claim ownership back to Cyprus Canada Inc., which held the claim until forfeiture in August, 1995. Westmin Resources Limited re-staked the TP mineral claim in November, 1995, and staked five new adjoining claims (Race 1 to 5) in February, 1996. In 1996, Westmin Resources Limited completed a program of diamond drilling and lithogeochemical sampling on the TP claim. The diamond drilling was concentrated on a 15 metre wide by 200 metre long, north-northwest trending zone of semiconformable gold-cobalt skarn mineralization (Main showing). A total of 694 metres was drilled in six holes over three drill sites. Lithogeochemical prospecting resulted in the collection of twelve rock grab samples.

The region lies within a northeasterly trending belt of pre-Permian metamorphic rocks. These rocks are the oldest in the region and are composed predominantly of schists with lesser marbles, quartzites and orthogneisses. The claim area is underlain by Devonian to Permian and older Boundary Ranges Metamorphic Suite consisting of gneiss, schist, marble and skarn. These are unconformably overlain by andesitic to basaltic volcanics, historically assigned to the Upper Triassic Stuhini Group. These are cut by a quartz-feldspar porphyry monzonite to granite stock, hornblendites, pyroxenites, dikes, sills of various ages and Cretaceous to Tertiary granodiorites to diorites.

The property contains many hornfels zones with disseminated pyrite, pyrrhotite, arsenopyrite, chalcopyrite and magnetite. There are also several areas of skarn development (variable epidote, chlorite, tremolite-actinolite, magnetite and pyrrhotite) on the property.

A skarn zone, 200 metres long and about 15 metres wide, occurs near the eastern contact of the stock and is zoned from north to south. The north end comprises magnetite-calcite skarn which grades into garnet-amphibole-magnetite skarn and then into marble. Zones of amphibole skarn occur near fracture zones cutting magnetite skarn, and host erythrite-cobaltite (or skutterudite) and native gold. Numerous rhyolite and monzonite dikes occur in the area. Disseminated arsenopyrite locally replaces magnetite skarn. One 20 centimetre diameter pod of chalcopyrite, malachite and galena occurs in calcsilicate-calcite skarn. The gold mineralized horizon in the skarn is 60 metres long along strike, cut off by a monzonite dike to the north and truncated by a fault to the south.

Gold and cobalt values generally occur together. Weighted average grades for gold range from 4.48 grams per tonne over 3.95 metres to 22.66 grams per tonne over 4.85 metres, and for cobalt range from 0.02 per cent over 3.95 metres to 3.91 per cent over 3.55 metres (Assessment Report 11300). Silver is generally less than 10.0 grams per tonne.

Results from the 1996 drilling by Westmin Resources at the Main showing indicates that the zone does not have significant downdip extensions. Drillholes oriented to intersect the east dipping, semicomformable skarn mineralization along the entire length of the showing failed to delineate significant zones of gold-cobalt mineralization. Detailed core logging revealed that extensive faulting subsequent to skarn formation has largely removed the skarn at depth. Quartz and quartz-feldspar porphyries along with lesser quartz+/-chlorite+/-biotite-amphibole schist occur in place of skarn in the drillholes.

Bibliography
EMPR ASS RPT *11300, 18766, 19438, 20790, *24844
EMPR BULL 105
EMPR EXPL *1988, pp. B159-160
EMPR FIELDWORK *1985, p. 187; 1988, pp. 293-310; 1990, pp. 139-144, 153-159
EMPR OF 1989-13
EMPR GEOS MAP 1997-1
EMPR PF (In 104M General File - Claim map of 104M, 1970)
EMPR RGS 37, 1993
GSC MAP 19-1957; 94A; 711; 1418A; 1426
GSC MEM 37
GSC OF 427, 2225 p. 42
GSC P 69-01A pp. 23-27, 78-01A pp. 69-70, 91-01A pp. 147-153, 92-01A
GSC SUM RPT 1906 pp. 26-32; 1911 pp. 27-58
Westmin Resources Limited 1995 Annual Report

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