INVENTORY FILE NO.
NAME OF PROPERTY
777 (Triple 7)
2002-Hudson Bay Mining and
Smelting Co. Ltd.
Winnipeg, MB, R3B 3K6
The 777 deposit, located 700 m south of the Callinan mine (See:
Mind No. 1045), consists of two lenses, inclined at 41° to 45 °, first
intersected at 1200 m. The first shallow lens contains copper-rich massive
sulphides, the second, deeper lens, contains a zinc-rich mineralization. The
shallower copper-rich deposit is near the vent of the exhalative system that is
believed to have formed the deposit. Vent feeders are present in the footwall of
the copper rich lens, in the form of altered volcanic rocks with biotite,
muscovite, talc, chlorite, magnetite, and carbonate. Chalcopyrite and pyrrhotite
stringers extend into the copper-rich lens from the footwall. This deposit is
very similar in zoning to that of the Flin Flon deposit (See: Mind No. 693),
which also had zinc-rich and copper-rich zones (Northern Miner, June
MINERALS OR PRODUCTS OF VALUE
Copper, gold, and silver.
EXPLORATION AND DEVELOPMENT
Hudson Bay Exploration and Development Company Limited (HBED)
discovered the Triple 7 deposit in November 1993. HBED had been exploring in the
area production began at the Callinan mine. The initial exploration indicated
reserves of 13.4 million tonnes (t) ore grading at 2.5% Cu and 4.4% Zn, 2.7 g/t
Au, and 38 g/t Ag, in the two ore bodies. A feasibility study was completed in
1999, (Canadian Mines Handbook, 1998-99) with positive results. The estimate of
reserves changed to 14.5 million t ore grading at 2.6% Cu and 4.9%
Development of a 1540 m shaft began in early 2000, but full production is
not expected until 2004. At that point, the mine is expected to produce 1
million t/year and Hudson Bay will have spent $360 million on capital
expenditures, including the $135 million expansion of the mill and electrolytic
zinc plant (Canadian Mines Handbook, 2000-01).
Canadian Mines Handbook 1999: Hudson Bay Mining and Smelting Company
Mines Handbook 1998-1999, p. 230.
Handbook 2001: Hudson Bay Mining and Smelting Company Limited; Canadian
Handbook 2000-01, p. 188.
Northern Miner 1999: Base metals—Triple 7
secures Flin Flon’s future; Northern Miner,
June 28, 1999.
Miner 2000: Big Blast brings more prosperity to Flin Flon; Northern Miner, July
Lucas, S.B., Weber, W. 1983: Bedrock Compilation Series OFR 2581,
63K Cormorant Lake;
Geological Survey of Canada, geological map, scale 1: 250
Surveys and Mapping Branch, Ottawa 1981: Map 63 K/13, Flin Flon;
Surveys and Mapping
Branch, Department of Energy, Mines and Resources,
geological map (3rd Edition), scale 1:50 000.
May be located within the Apex mining lease. See Mind No. 693 (Flin
Flon), and Mind No. 1045 (Callinan) for further information on this area.