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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  14-Dec-2015 by Garry J. Payie (GJP)

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NMI 093F13 Cu1
Name BOSS, WEE MCGREGOR, DANSKIN Mining Division Omineca
BCGS Map 093F092
Status Showing NTS Map 093F13W
Latitude 053º 59' 05'' UTM 10 (NAD 83)
Longitude 125º 47' 33'' Northing 5985432
Easting 316908
Commodities Copper, Silver, Gold, Lead, Zinc Deposit Types I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Intermontane Terrane Stikine
Capsule Geology

The Boss occurrence is located 4.5 kilometers south of the southern shore of Francois Lake, near the community of Danskin.

Eocene andesitic volcanics of the Endako Formation (Nechako Plateau Group) underlie much of the Boss region. In the Boss showing area itself are Jurassic to Cretaceous coarse clastic sediments of the Bowser Lake or Skeena groups. Volcamic rocks of the Middle Jurassic Naglico Formation (Hazelton Group) are separated from the Skeena/Bowswer packaged by a Late Cretaceous to Pliocene intrusion of feldspar porphyry known as the Danskin porphyry which is dacitic to andesitic in composition. Eocene to Oligocene rhyolite rock of the Ootsa Lake Formation (Nechako Plateau Group) is exposed to the south.

Near the Danskin porphyry, the Boss copper-lead-zinc showing comprises a number of small sub-parallel veins within shears cutting andesitic rocks. This zone of veining occurs over a width of about 100 metres. Mineralization consists of chalcopyrite, galena and sphalerite which occurs in quartz veins and along small fractures and as disseminations in quartz carbonate altered zones along northwest trending shears in andesitic rocks. Silicification and the presence of fluorite are associated with the quartz veining. A sample from a 0.76 metre wide shear zone across the footwall seam 0.15 metre wide assayed 1.7 per cent copper, 19.20 grams per tonne silver and 0.6856 gram per tonne gold (Minister of Mines Annual Report 1980, page A146).

In 1987, the Boss claims were staked as part of the Nechako Joint Venture between Imperial Metals, Atna Resources and Interaction Resources. Soil sampling completed in this year assayed lower than the 1980 sample of 1600 parts per billiion and no soil anomalies were outlined (Assessment Report 16797). About 1.5 kilometres to the northeast, a bed of pyritized rhyolite is exposed. A sample disclosed only trace silver and gold.

In 2008, reconnaissance work was done on the Boss property on behalf of Takara Resources Inc. Pervasive, intense, sulfide mineralization was found at or near what was thought to have been the Boss MINFILE locality, at sample-site JB-37. Sulfide minerals (pyrite-chalcopyrite) are concentrated along structures striking 135 to 155 degrees. Relatively sparse sulfide mineralization also occurs in sheared alteration zones in mafic volcanic rocks (JB-41 and JB-42). In general on the 2008 Boss claim, abundant, visible chalcopyrite and pyrite mineralization is focussed along fractures, faults, and shear bands on the property. Southeast-trending fractures are the main host to sulfide mineralization which occurs in variably altered andesite, with related and extensive carbonate and siliceous alteration (Assessment Report 30567).

Bibliography
EMPR AR *1930-A146
EMPR ASS RPT *16797, *30567
EMPR EXPL 1992-69-106
EMPR FIELDWORK 1992, pp. 475-481; 1993, pp. 9-14, 39-44; 1994, pp. 167-170, 193-197
EMPR OF 1994-19
EMPR PF Placer Dome (Atna Resources Ltd. (1987-01-01): Nechako Joint Venture Regional Reconnaissance Program)
GSC MAP 1131A; 1424A
GSC MEM 324
GSC P 90-1F, pp. 115-120
EMPR PFD 860468

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