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File Created: 18-Feb-2003 by BC Geological Survey (BCGS)
Last Edit:  18-Feb-2003 by Garry J. Payie (GJP)

Summary Help Help

NMI
Name BASIN, BUGABOO, WALKER, CHIPPERFIELD, NIX Mining Division Golden
BCGS Map 082K077
Status Showing NTS Map 082K10E
Latitude 050º 42' 43'' UTM 11 (NAD 83)
Longitude 116º 43' 50'' Northing 5617827
Easting 519024
Commodities Silver, Lead Deposit Types I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Omineca Terrane Ancestral North America
Capsule Geology

The Basin property is located on Frenchman Mountain near the headwaters of Bugaboo Creek, some 53 kilometres northwest of Invermere.

In 1936, Resident Mining Engineer H. Sargent visited the No. 21 and Western Cross claims (Silver Basin - 082KNE020) and the Basin Group of claims which seem to have included the Walker, Chipperfield and Nix. At the time, these properties were held by the Silver Basin Mining Syndicate of Alberta.

Sargent reports that the Basin group, located in a large basin having four small lakes, on "Green Mountain" is reached by about 5.6 kilometres of trail from the Bugaboo Creek trail. The trail to the Basin group branches from the main trail up Bugaboo Creek at about 2.4 kilometres from the end of the road up Bugaboo Creek (in 1936). This branch is reported to be at 1478 metres elevation.

Sargent reports that the workings on the Basin group are probably the same as those reported under Bugaboo group in the Minister of Mines Annual Report for 1898. The Bugaboo group was reported to be on French Mountain west of Bugaboo Creek. Today, Frenchman Mountain exists in this area and has a hanging valley similar to Sargents, with four lakes.

The rocks in the Basin are slates, schists, minor exposures of thin-bedded limestone and conglomerate of the Upper Proterozoic Horsethief Creek Group. Porphyritic granite intrudes the strata as sills. The slates vary from light bluish-grey to almost black. There are soft sericitic schist and hard siliceous schist. The granite may be related to the Cretaceous stock to the northwest.

An abundance of unmineralized white quartz veins is observed in the schist and granite throughout the basin. Near the southwestern corner of the basin is an adit which goes in 4.6 metres from the end of a 9-metre rock cut, following a vein in porphyry. The dip is 75 degrees to the southwest. At the portal, the vein is honeycombed and rusty and mineralized with pyrite, arsenopyrite and some galena. A sample across 33 centimetres of vein assayed 98.00 grams per tonne silver and a trace of gold (Sargent, 1936 (Property File)). About 45 metres north of this adit is another adit which goes in 7.6 metres at 305 degrees, following a fracture in porphyry containing sheared wallrock and some quartz. This adit is about 7.6 metres higher than the first. About 180 metres northwest and 36 metres higher up than the second adit is a shaft about 2.4 metres deep. In the shaft is a quartz vein about 36 centimetres thick striking 305 degrees and dipping vertically. For 10 centimetres on the southwest side, the vein is well-mineralized with pyrite, arsenopyrite and a little galena in scattered kernels.

About 800 metres to the east of the Bugaboo workings, on a ridge, is another adit which has been driven into sericite schist for 32 metres in a northwest direction. Above the adit portal is a 1.2-metre quartz lens that did not yield any gold or silver.

Bibliography
EMPR AR 1893,1062 (map); *1898-1046; 1896-518
EMPR PF (*Sargent, H. (1936): Special Report of the Minister of Mines for 1936 (in 082KNE020)
EMPR PRELIM MAP 22; 62
EM GEOFILE 2003-2
GSC MAP 2070; 12-1957; 1326A
GSC MEM 148; 369

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