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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  30-Mar-2022 by Karl A. Flower (KAF)

Summary Help Help

Name TERMINUS Mining Division Skeena
BCGS Map 104B020
Status Showing NTS Map 104B01E
Latitude 056º 06' 14'' UTM 09 (NAD 83)
Longitude 130º 01' 19'' Northing 6218100
Easting 436435
Commodities Silver, Gold, Lead, Zinc, Copper Deposit Types I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Intermontane Terrane Stikine
Capsule Geology

The Terminus area is underlain by the Hazelton Group which is a northwest trending belt of folded volcanic rocks which contains a thick sedimentary sequence infolded along a synclinal axis. This group is bounded on the west by the Coast Crystalline Complex and on the east by the Bowser Basin.

The host rocks are the Lower Jurassic Unuk River Formation of the Hazelton Group. The Terminus showing is underlain by andesitic tuff which is characterized by sericitization and partly by silicification. The mineralized zones occur in quartz and quartz-calcite veins that outcrop 200 metres west of Silver Creek (Harris). A short adit about 12 metres long cut several quartz veins that are mineralized with massive galena and minor chalcopyrite and sphalerite. A 15-centimetre chip sample cut across a vein near the portal of the adit assayed 6.95 per cent lead, 0.70 per cent zinc, 99.43 grams per tonne silver, and 1.4 grams per tonne gold (Assessment Report 3013).

The Terminus Zone consists of discontinuous en echelon zones of brecciated and silicified rocks with quartz-calcite veinlets generally carrying sparse galena and sphalerite with minor chalcopyrite. In drill core, rare argentite, tetrahedrite and native silver have been identified. Locally, semi-massive galena, pyrite, sphalerite and chalcopyrite may form zones that are 1-2 meters wide and up to 20 meters in length. Overall, sulphides may be from 2-5 per cent of the zone. The silicified zones appear to have enveloped strongly sericite-altered andesite that extends for several meters into the walls rocks of the silicified rocks. These zones of silicification, which appear to have an oblique strike to the overall trend of the zone, may be up to 5-10 meters thick, 15-20 meters wide and 25-50 meters long, appear to dip gently to the south.

Work History

The area encompassed by the Silver Coin Property has had a long mining/exploration history dating back to 1904. The present Silver Coin Project includes the historical Silver Butte (“SB”), Terminus and original Silver Coin properties. The former Silver Butte property included the present Winer, Big Missouri and Kansas claims. The Terminus property was covered by Silver Coin 3 and 4 mineral claims. The ori383ginal Silver Coin property included the Silver Coin, Idaho, Idaho Fraction and Dan Fraction mineral claims.

Very little information is available for the early work completed on this claim; however, documents from the B.C. Ministry of Mines indicate mineralization was discovered on the Terminus Claim in 1911. In 1916, a Crown granted claim was established over the known mineralization. Work on the property continued intermittently from 1911 but with little documentation. During the 1930’s, a short adit was driven on massive galena veins on the Terminus Zone, in the area of the present Silver Coin 2 claim. Work continued intermittently with little documentation.

In the early 1980s, the Terminus claim was purchased by Tournigan Mining, which subsequently sold it to Westmin in 1983-1984. Three vertical drill holes, totaling 100 m, were completed in the early 1980s. Subsequently, soil sampling and airborne geophysical surveys, including K-count radiometric surveys, were completed over the Terminus claim as part of a larger exploration program on the Big Missouri property held by Westmin. The radiometric survey indicated that sericite alteration extended across the Terminus claim, south to No Name Lake. In addition, soil sampling indicated anomalous silver values south of the historical workings. The claim was dropped in 2004 by Westmin and re-staked the same year by Mountain Boy Minerals. It was subsequently renamed Silver Coin 3 and 4 claims. Minor tetrahedrite with rare argentite and native silver has been noted in drilling on the Terminus zone.

In 2003, two trenches were excavated at the Terminus showing by Mountain Boy Minerals. In 2004 Mountain Boy and Pinacle Mines (later Jayden Minerals) excavated 288 metres of the trenches on the Silver Coin property. The best trench values for gold were in trench 1a on the Terminus zone which consisted of 12.1 meters of 8.4 grams per tonne gold, 23.9 grams per tonne silver, 0.03 per cent copper, 0.37 per cent lead and 1.20 per cent zinc (as reported in Assessment Report.29383).

From 2004 to 2010, a total of 50,305 metres of drilling from 324 surface holes was completed by Mountain Boy Minerals and Jayden Minerals to expand and infill the known mineral resources in the Main Breccia zone on the Silver Coin property which included the Terminus occurrence. The Main Breccia zone encompasses the Silver Butte deposit area.

In 2010, Jayden Minerals completed 2,808 metres of drilling in 18 NQ-sized core surface drill holes in order to expand and infill the known resources. Four drill holes were drilled on the Kansas Crown Grant, ten drill holes were drilled on the Big Missouri (405872), one drill hole was drilled on each of the Silver Coin 9 (406223) and Dan Fraction (404872), and two drill holes were drilled on the Packers (405874) mineral tenure for a total of 18 drill holes. The drilling program targeted potential mineralization along strike and improved the definition of high-grade zones within the Main Breccia zone.

See Silver Coin (104B 150) for related details.

EMPR AR 1911-73; 1916-522
EMPR ASS RPT 912, 2320, *3013, 8202, *29383, *32699, 33267, 33401, 35410, 38850, 39342
EMPR BULL 58, p. 126; 63
EMPR EXPL 1980-461
EMPR FIELDWORK 1980, pp. 201-209; 1982, pp. 182-195; 1983, pp. 149-164; 1984, pp. 316-341; 1985, pp. 217, 218; 1986, pp. 81-92, *93-102
EMPR OF 1987-22
EMPR PF (Wikstrom, C.C., (1969): Letter; Mountain Boy Minerals Ltd. (2003): Exploration Projects Brochure)
CIM SPEC. Vol. 37, pp. 202-215
GSC MAP 9-1957; 307A; 1418A; 1829
GSC P 89-1E, pp. 145-154
GCNL #238, 1977
Brown, D.A. (1987): Geological Setting of the Volcanic-Hosted Silbak Premier Mine, M.Sc. Thesis, University of British Columbia (in Property File: 104B 054)
Galley, A. (1981): *Volcanic Stratigraphy and Gold-Silver Occurrences on the Big Missouri Claim Group, Stewart, British Columbia, M.Sc. Thesis, University of Western Ontario
Pinnacle Mines, Ltd. (2009-12-30): Silver Coin Gold Project NI 43-101 Preliminary Economic Assessment Report, Stewart, British Columbia, Canada
Butler, S. (2013-08-23): NI 43-101 Report – Silver Coin Project
Rennie, D.W. (2019-01-17): Technical Report on the Premier Project
Bird, S.C., Meintjes, T. (2020-02-28): Resource Estimate Update for the Premier Gold Project, Stewart, British Columbia, Canada, Ascot Resources Limited (2020-05-22): Premier & Red Mountain Gold Project Feasibility Study NI 43-101 Technical Report, British Columbia
EMPR PFD 19013