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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  04-Apr-2022 by Karl A. Flower (KAF)

Summary Help Help

Name THOR Mining Division Atlin
BCGS Map 104K029
Status Showing NTS Map 104K01W
Latitude 058º 13' 49'' UTM 08 (NAD 83)
Longitude 132º 22' 17'' Northing 6457359
Easting 654352
Commodities Silver, Gold, Copper Deposit Types
Tectonic Belt Intermontane Terrane Stikine
Capsule Geology

The area is underlain by pre-Triassic felsic and mafic phyllites and intercalated limestone, dolomite and greenstone of the Stikine Terrane. These are cut and bounded by north-east trending faults.

Silicification within the Upper Carboniferous felsic phyllite is bounded by conjugate sets of faults. It also masks foliation within the phyllite and is controlled by bedding within the limestone and dolomite to form lens-shaped alteration zones up to 10 metres long. Iron carbonate alteration is common throughout the fault bounded package.

Quartz veins and fractures are common in the dolomite and phyllite units and contain tetrahedrite, malachite, azurite, pyrite, K-spar, hematite, and tourmaline.

A 1.0 metre chip sample from Trench 2 contained 58.9 grams per tonne silver and a subcrop sample of a chalcedony vein contained 1.35 grams per tonne gold (Assessment Report 11963). Trench 1, which is located 500 metres north-northwest of Trench 2, contains several narrow (less than 1 centimetre wide) veins with tetrahedrite, however, low gold and silver values resulted from sampling.

EMPR FIELDWORK 1992, pp. 177-188
EMPR ASS RPT *11963, 12751, 14002
EMPR EXPL 1983-540; 1984-396-397; 1985-394
GSC MAP 6-1960; 1262A
EMPR PF (RPTS by Lefebure, D. (1987))
EMPR OF 1993-1
Burrell, H., Deiss, A.M. (2021-06-23): Thorn Property NI 43-101 Technical Report Sutlahine River Area, British Columbia, Atlin Mining Division