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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  27-May-2021 by George Owsiacki (GO)

Summary Help Help

NMI 094C6 Pb1
Name BURN (CRAG), CRAG Mining Division Omineca
BCGS Map 094C043
Status Showing NTS Map 094C06W
Latitude 056º 27' 30'' UTM 10 (NAD 83)
Longitude 125º 29' 28'' Northing 6259875
Easting 346497
Commodities Lead, Zinc, Silver Deposit Types J01 : Polymetallic manto Ag-Pb-Zn
Tectonic Belt Omineca Terrane Quesnel, Cassiar
Capsule Geology

The Burn (Crag) lead-zinc occurrence is located 16 kilometres east-northeast of Aiken Lake, approximately 97 kilometres northeast of the community of Germansen Landing.

The hostrock is a northwest striking, southeast dipping massive white limestone recently reassigned to the Lower Cambrian Atan Group (Mount Kison Formation) (Open File 1993-2). A generalized stratigraphic section (from Assessment Report 4605) is as follows:

(1) coarse grit with conglomerate lenses

(2) green chlorite schist

(3) massive white limestone

(4) grey, fine-grained dolomite

(5) siliceous dolomite capped by white quartzite

(6) pyritic, graphitic siliceous black slate

The showing is exposed in two outcrops and in trenches. It consists of narrow seams of fine-grained galena in a 1 metre wide, east striking, tan dolomitic zone which crosscuts massive white limestone. Some of the dolomitic zones are "breccia-like" with grey dolomitic fragments in a coarse dolomitic or calcitic cement. Sphalerite is minor, as is pyrite. Some cerussite was identified in polished section. In 1973, a grab sample assayed 5.0 per cent lead, 2.8 per cent zinc, 188.6 grams per tonne silver and 0.48 per cent barium (Assessment Report 4605). Barite lenses outcrop in black shale 900 metres southeast of the showing.

In 1972-73, Serem Ltd. carried out stream sediment sampling, line cutting, soil sampling, trenching and geological mapping.

Bibliography
EMPR ASS RPT *4605, 4608
EMPR FIELDWORK 1991, pp. 127-145; 1992, pp. 109-134
EMPR GEM 1972-477; 1973-398
EMPR GEOS MAP 2001-10
EMPR OF 1992-11; 1993-2; 1995-6; 1996-19
GSC MAP 1030A
GSC MEM 274
GSC OF 864
GBC 2021-01, pp. 105-120

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