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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  21-Feb-2020 by George Owsiacki (GO)

Summary Help Help

NMI
Name LAKE, SANDY 35 Mining Division Liard
BCGS Map 104O098
Status Showing NTS Map 104O15E
Latitude 059º 58' 49'' UTM 09 (NAD 83)
Longitude 130º 32' 36'' Northing 6650219
Easting 413870
Commodities Lead, Zinc, Silver Deposit Types I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Omineca Terrane Plutonic Rocks, Cassiar
Capsule Geology

The Lake occurrence is located about 11 kilometres north of Tootsee Lake in the Cassiar Mountains, 2 kilometres south of the British Columbia-Yukon border.

The showing consists of quartz stringers with galena and sphalerite in a north trending shear zone in locally porphyritic biotite quartz monzonite of the Early Cretaceous Cassiar batholith. A vertical dipping gabbroic dike, about 3 metres wide, parallels the mineralized zone. Intrusive rocks within the shear zone are brecciated, sericitized and chloritized.

Lead isotopic signatures from the Lucky vein (104O 033) located 6 kilometres east, plot in a cluster with other local polymetallic occurrences of known mid-Cretaceous through Eocene age. Abbott (1984) has related the veins and replacements of the Rancheria district to small granites that post-date the main Cassiar batholith (Fieldwork 2000, page 62).

In 1971, Yucol Mines Ltd. conducted a limited ground VLF-EM and magnetometer survey.

Bibliography
EMPR ASS RPT *3844, 14165
EMPR FIELDWORK 2000, pp. 51-66
EMPR OF 1996-11; 2001-6
GSC MAP 18-1968
GSC OF 561; 2779
GSC P 68-55
Abbott, G. (1983): Silver-bearing veins and replacement deposits of the Rancheria District, Yukon Exploration and Geology, DIAND, pp. 34-44

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