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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  25-Mar-2022 by Nicole Barlow (NB)

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NMI 093L10,15 Au1
BCGS Map 093L077
Status Past Producer NTS Map 093L10E
Latitude 054º 44' 25'' UTM 09 (NAD 83)
Longitude 126º 37' 16'' Northing 6068487
Easting 653141
Commodities Gold, Silver, Zinc, Lead, Copper, Antimony Deposit Types I01 : Au-quartz veins
I02 : Intrusion-related Au pyrrhotite veins
I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Intermontane Terrane Stikine
Capsule Geology

At the Dome Mountain (Forks) occurrence, the original showing was in the creek bed, in a northeast trending shear zone in schistose andesites of the Lower-Middle Jurassic Nilkitkwa Formation (Hazelton Group).

The Forks consists of two veins that are found to be striking west south/west and dipping at a shallow angle towards the Boulder structure. The Forks Gold Deposit is a flat lying, extremely sheared and altered quartz breccia vein structure with a thickness of up to 12 metres. Drilling in 1987 intersected intervals up to 7.6 metres grading 10.42 grams per tonne gold and 53.38 grams per tonne silver (as reported in Assessment Report Assessment Report 28891).

The orebody (10 by 30 metres long) was reported as quartz heavily charged (5 to 10 per cent) with galena, arsenopyrite, pyrite and sphalerite. Later tunnelling outlined two quartz veins averaging 30 to 150 centimetres in width hosted in sericite-carbonate-fuchsite altered and foliated tuffs. The veins contain pyrite, galena, sphalerite and arsenopyrite. One vein, trending northwest and dipping northeast averages (weighted) 42.1 grams per tonne gold and 85.4 grams per tonne silver over 12 metres. The other vein trends northeast and averages 15.3 grams per tonne gold and 59.0 grams per tonne silver.

Prospectors first staked claims on Dome Mountain in 1914 to cover several showings of gold-bearing quartz veins. In 1923, three shafts, totalling 225 metres of underground drifting were completed on the property by Dome Mountain Mining Company. The next year, all work was halted due to the patchy nature of the gold mineralization and excessive water in the workings.

Noranda Exploration Corporation Limited consolidated all the claims on Dome Mountain in 1984 and conducted a program of soil geochemistry surveys, geological mapping, trenching and 33 diamond-drill holes. Canadian-United took over the operation in 1985 and proceeded with a diamond drilling program.

In 1989, Teeshin Resources Limited reported mineable reserves of 18120 tonnes at 23.67 grams per tonne gold from a shallowly dipping vein in the Forks zone (Property File Placer Dome Smit., 1990).

Drilling in 1985 defined a geological reserve of 20,000 tonnes grading 23.6 grams per tonne gold (Fieldwork 1986, page 212).


Production is given for 1940 and 1951 totalling 5 tonnes but historic records do indicated work being done on Dome Mountain at that time.

In the early 1920s, on the Forks showing a shaft was sunk to 32.6 metres, a crosscut was driven to the vein on the 30 metre level, and "several hundred feet" of drifting carried out.

Work in 1985, with Noranda as operator, included trenching, and 1564 metres of diamond drilling in 33 holes on the Forks showing (093L 022); this work indicated 91,000 tonnes at 19.2 grams per tonne gold (George Cross News Letter, 1985, No. 240). However, Assessment Report 28891 gives the following statement, "From 1985 to 1987 a total of 23 diamond drill holes on the Forks Gold deposit outlined a resource of 20,000 tonnes at a grade of 23.6 grams per tonne gold." The resource values in this paragraph appear to be at odds.

In 2008, Eagle Peak Resources collected soil sampling over a grid that covered Dome Mountain (Boulder) (093L 276), Forks (093L 022) and 9800 (093L 277). An IP survey was conducted over 22 kilometres and ground magnetic survey over 23.1 kilometres.

Refer to Dome Mountain (Boulder vein) (093L 276) for related details and a complete Dome Mountain property work history.

EMPR AR 1915-77; 1916-130; 1918-122; *1922-103; 1923-111; 1924-96
EMPR EXPL 1984-329; 1987, pp. B53-B58,C306; 2002-6; 2007-27; 2008-31; 2009-10; 2010-22; 2011-23; 2012-37; 2013-51
EMPR FIELDWORK *1984, pp. 193-213; *1986, pp. 201-222; 1988, pp.195-208
EMPR MAP 65 (1989); 69-1
EMPR MINING 1981-1985
EMPR OF *1987-1; 1992-1
EMPR PF (Canadian United Minerals Inc. 1987; A.J. Gaul, 1922; Canadian Silver Standard Mines Ltd.: Annual Report 1986; Claim Maps; Teeshin Resources Ltd., 1987 Annual Report)
EMPR PF Placer Dome (H. Smit (1990): Exploration Potential report of the Dome Mountain Project; H. Smit (1990): Exploration Potential Map of the Dome Mountain Project; Unknown (unknown): Summary notes re Dome Mountain)
EMPR PF Rimfire (Canadian-United Minerals (1986-11-01): Dome Mountain Update November 1986, A B.C. Exploration Success)
GSC OF 351
GCNL #193,#236, 1980; #29, 1981; #155, 1982; #99,#135,#153,#178,#179, #206,#225,#240, 1985; #15,#19,#27,#31,#58,#70,#109,#112,#130,#147, #154,#176,#182,#192,#204,#207,Dec.2,18, 1986; #32,#73,#76,#94,#98, #169,#174,Nov.18, 1987; #65,#66, 1988
IPDM Nov.,May/June 1985; Feb. 1986
N MINER Dec.30,May 2, 1985; Jan.6,20,27,Feb.17,24,Mar.31,May 12, Jun.30,Nov.17, 1986; Jan.5,Nov.30, 1987; Apr.4, 1988
V STOCKWATCH Apr.14,16,May 22,Jun.18,Sept.3,Nov.17, 1987
WIN Vol. 1, #7, June 1987
B.C. Business Magazine, Apr. 1986
North American Gold Mining Industry News Vol. 3, #15, Oct.11,Jul.19, Jun., Nov.8, 1985
Blue Lagoon Resources Inc. (2020-07-13): Preliminary Economic Assessment, Dome Mountain Mine, British Columbia, Canada