British Columbia Ministry of Energy, Mines and Natural Gas and Responsible for Housing
News | The Premier Online | Ministries & Organizations | Job Opportunities | Main Index

MINFILE Home page  ARIS Home page  MINFILE Search page  Property File Search
Help Help
File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  09-Jul-2018 by George Owsiacki (GO)

Summary Help Help

NMI 103P13 Ag10
Name BLACK HILL, EXCELSIOR & EAGLE, BLACK HILL NO. 1 (L. 5240), BLACK HILL NO. 2 (L. 5241), BLACK HILL NO. 3 (L. 5242), BLACK HILL NO. 4 (L. 5244), NELLEY W. NO. 1 FR. (L. 5244) Mining Division Skeena
BCGS Map 103P091
Status Past Producer NTS Map 103P13W
Latitude 055º 56' 56'' UTM 09 (NAD 83)
Longitude 129º 52' 17'' Northing 6200734
Easting 445582
Commodities Silver, Zinc, Lead, Gold, Copper, Antimony Deposit Types I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Coast Crystalline Terrane Stikine, Plutonic Rocks
Capsule Geology

The Black Hill occurrence is located near the headwaters of the south fork of Glacier Creek, 7.5 kilometres east-northeast of Stewart. A few shipments of high-grade ore were made from this occurrence in 1930, 1935 and 1983.

The showing consists of various veins hosted in augite diorite and argillite. These occur on the southeastern margin of a Tertiary(?) stock of the Coast Plutonic Complex that intrudes argillite, greywacke and limestone of the Middle Jurassic Salmon River Formation (Hazelton Group).

A set of steeply dipping, west striking quartz veins from 0.15 to 0.20 metre wide, contain sparse galena, sphalerite, tetrahedrite and rare chalcopyrite. A second set of north striking, steeply dipping veins up 0.3 metre wide, are well mineralized with sphalerite, tetrahedrite, galena and jamesonite.

Significant mineralization is confined to several of the north-striking veins. A 1.8 metre wide shear zone striking 020 degrees and dipping 50 to 85 degrees northwest contains a vein along its margin. This vein contains locally massive sphalerite, jamesonite, stibnite, galena and tetrahedrite in a gangue of quartz, calcite, siderite and barite. The vein forms an ore shoot which averages 0.3 metre in width over a length of 12.5 metres. Veinlets containing similar massive sulphides occur throughout the rest of the shear zone. A 0.40 metre chip sample across the ore shoot assayed 3.4 grams per tonne gold, 3839 grams per tonne silver, 11.5 per cent lead and 4 per cent zinc (Minister of Mines Annual Report 1929, page 96).

An adjacent shear zone, 30 metres to the west, strikes 030 degrees and dips 65 degrees west. It contains, along the footwall, a 0.10 to 0.40 metre wide vein of massive sphalerite, tetrahedrite, galena and jamesonite. A composite chip sample over a length of 9 metres and an average width of 0.20 metre assayed 1.37 grams per tonne gold, 2955 grams per tonne silver, 9.8 per cent lead and 6.8 per cent zinc (Minister of Mines Annual Report 1929, page 96).

Sorted ore totalling 53 tonnes was produced in 1930, 1935 and 1983, with an average grade of 1.17 grams per tonne gold, 5658 grams per tonne silver, 16.1 per cent lead, 2.92 per cent zinc and 0.41 per cent copper.

In 2013, Rotation Minerals Ltd. purchased the Black Hills property and completed grab sampling of well-mineralized dump material near a north-trending adit on the property. Highlights of this sampling include sample BH 5, which assayed 1.35 grams per tonne gold, 4080 grams per tonne silver, 0.36 per cent copper, 11 per cent lead and 17.1 per cent zinc (Press Release - Rotation Minerals Ltd., January 17, 2013).

Bibliography
EMPR AR 1908-56; *1919-72; 1920-59; 1921-65; 1922-75; 1923-74; 1928-99,100; *1929-96; 1930-439; 1934-B24; 1935-A24
EMPR ASS RPT *10006, 12578
EMPR BULL 58; 63
EMPR ENG INSP (Mine Plans: #61421, Apr., 1973)
EMPR FIELDWORK 1983, pp. 149-163; 1984, pp. 316-341; 1985, pp. 217, 218; 1986, pp. 81-102; 1988, pp. 233-240; 1990, pp. 235-243; 2005, pp. 1-4
EMPR GEM 1972-510,580
EMPR MAP 8
EMPR PF (Lehto Resources Ltd. Prospectus, 1974; Chisholm, E.O. (1973): Report)
EMPR OF 1986-2; 1994-14
EMR MIN FILE MR-AG-301.00, pp. 91-94, Jun. 1930
EMR MP CORPFILE (Black Hill Mining Co. Ltd.)
GSC MAP 215A; 307A; 315A; 1385A
GSC MEM 32, pp. 45,46; 175, pp. 109,114
GSC SUM RPT 1910, pp. 79,80
GSC OF 864; 2931; 2996
PR REL Rotation Minerals Ltd., Jan.17, 2013
EMPR PFD 18329, 18330, 750506

COPYRIGHT | DISCLAIMER | PRIVACY | ACCESSIBILITY