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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  11-Jul-2015 by Karl A. Flower (KAF)

Summary Help Help

NMI
Name DOUGLAS PINE (L.271), GOLD EXCHANGE (L.272), CONE FRACTION (L.273), MORNING STAR (L.343) Mining Division Vancouver
BCGS Map 092K044
Status Past Producer NTS Map 092K06W
Latitude 050º 27' 07'' UTM 10 (NAD 83)
Longitude 125º 21' 19'' Northing 5591532
Easting 332801
Commodities Gold, Silver, Copper Deposit Types I01 : Au-quartz veins
Tectonic Belt Coast Crystalline Terrane Wrangell, Plutonic Rocks
Capsule Geology

The Douglas Pine (L.271) occurrence is located on the northeast corner of East Thurlow Island, approximately 1 kilometre southeast of Shoal Bay.

The area is underlain by quartz diorite of the Cretaceous to Jurassic Coast Plutonic Complex, within which is contained a roof pendant of stratified metavolcanic and metasedimentary rocks of the Upper Triassic Quatsino and Karmutsen formations (Vancouver Group). This belt-like roof pendant is considered to be an extension of the belt at Fanny Bay and trends northwest (Geological Survey of Canada Open File 480). The metamorphic rocks consist mainly of hornblende schist, which grades in and out of irregularly layered gneiss, schlieren gneiss and local agmatite.

The Douglas Pine occurrence is situated on a shear zone that roughly follows the irregular metamorphic-intrusive contact. A quartz vein in-fills the strong northwest- trending shear or fissure zone with north east dips of 50 to 85 degrees. The vein ranges from a few centimetres to 2 metres wide and is locally mineralized with lenses and disseminations of pyrite, pyrrhotite, arsenopyrite and minor chalcopyrite. The main ore-shoot, 15 to 30 metres long and 60 metres down dip has been almost completely stoped out.

An assay of 34.28 grams per tonne gold, 47.992 grams per tonne silver and 0.15 per cent copper is recorded from a channel sample across 47.72 centimetres (Property File, O'Grady, B.T., 1936). This assay was obtained from an adit at 285 metres elevation.

In 1982, a dump sample assayed 133.4 grams per tonne gold, while an underground sample, from the 285 metre adit, assayed 34.2 grams per tonne gold (Assessment Report 11608).

In 1983, eleven samples from the 285 metre level adit yielded an average of 0.06 per cent copper, 33.3 grams per tonne silver and 2.06 grams per tonne gold over a width of 1.27 metres. At the same time, seven samples from the 305 metre level adit yielded an average of 0.447 per cent copper, 16 grams per tonne silver and 3.58 grams per tonne gold (Assessment Report 11608).

From 1938 to 1940, 310 tonnes of mined ore produced 6656 grams of gold, 10,389 grams of silver and 1569 kilograms of copper.

The original Douglas Pine Crown grants were staked in the 1890’s and sporadically worked until the late 1930’s. During 1938 through 1940, mining operations were conducted on four levels, which were referred to as the 270 metre, 285 metre, 305 metre and 330 metre elevation adits. In 1982, Queenstaked Resources conducted a brief program of mapping and sampling. In 1983, Amalgamated Mining Western optioned the property and completed a program of rock and soil sampling, geological mapping and combined ground electromagnetic and magnetic surveys on the area. In early 1987, Verdstone Gold completed a program of soil sampling and a 5.1 line-kilometre ground electromagnetic survey on the area as the Bick 1 to 4 claims. Later the same year, Rea Gold, on behalf of Verdstone, completed a program of rock and soil sampling, geological mapping and 21 line-kilometres of combined ground magnetic and electromagnetic surveys on the area.

Bibliography
EMPR AR 1898-1145,1197; 1899-807,816; 1917-256; *1926-313; 1929-387; 1930-304; 1933-256; 1940-28,74
EMPR ASS RPT *11608, 15589, 17274
EMPR BULL 1, 1932, p. 140
EMPR EXPL 1983-328
EMPR PF (Starr, C.C. (1941): Report of Examination of the Douglas Pine Mine, 11 p.; Plan Showing Workings and Vein Outcrops (1"=30'), 1941; Douglas Pine Group and Adjoining Claims (1"=30'); Detail of workings, with geology and assays (1"=30'), 1941; Douglas Pine Mine - Longitudinal Section (1"=60'), 1941; *O'Grady, B.T., (1936): Special Report on Douglas Pine)
GSC MAP 65A; 169A; 1386A
GSC MEM 23, p. 127
GSC OF *480
EMPR PFD 11811, 11882, 11883, 11884, 11885

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