|Years of Operation:||1939 – 1942|
|Tons Milled:||223 810|
|Ounces of Gold Produced:||31,352|
Tyranite Mine (Past Producer)
Approximately 14 miles northeast of Shining Tree, adjacent to the 4-mile post on the Knight-Tyrrell township boundary, in northern Tyrrell Township. Shaft in claim GG5801. Latitude 47.670 , Longitude 81.000. Map reference: ODM 2365, Macmurchy and Tyrrell
Keewatin mafic to intermediate metavolcanics, lying 500 feet west of a contact with Cobalt Group sedimentary rocks, are intruded by several bodies of peridotite (now altered to serpentinite) a granodiorite stock, and numerous lamprophyre and feldspar porphyry dikes. For two-thirds of its 950 foot length, a mineralized fracture zone occurs along the carbonatized and silicified contact between the peridotite intrusion and an andesite flow. Gold values are associated with the presence of pyrite, which occurs in quartz-carbonate veinlets in the fracture zone and in the rock adjacent to them.
Underground development showed that the deposit consisted of two parallel north-trending carbonatized and pyritized shears. At surface the south orebody was 400 by 39 feet and the north orebody measured 200 by 20 feet. The gold occurred in heavily mineralized zones which formed pods and lenses. Before the mine closed in 1942, gold values of 0.20 ounce of Au per ton were encountered during drilling to a depth of 1,400 feet.
Leased by Tyranite Mines Limited.
1930: Part of property staked and some surface work by L.O. Hedlund.
1931: Trenching and nine diamond-drill holes (2,200 feet) by Waite Syndicate, Ventures Limited, and Nipissing Mining Company Limited.
1933: Diamond-drilling (amount unknown) by Mcintyre Porcupine Mines Limited.
1934: Surface work and diamond-drilling (amount unknown) by Consolidated Smelters.
1936-1942: Three-compartment shaft to 1,151 feet, inclined two-compartment 350-foot winze from the 525-foot level, and 12,378 feet of underground development on seven levels. Surface and under ground diamond-drilling (amount unknown). 200-ton mill installed. Work by Tyranite Mines Limited.
|Year||Gold||Silver||Ore Milled||Recovered Grade|
|(ounces)||(ounces)||(tons)||(ounce of Au per ton)|
ODM 1932, Vol.41, pt.2, p.49-52, (Hedlund Property).
ODM 1977, GR 152, p.55, 56.
Gordon, J.B., Lovell, H.L., de Grijs, Jan, and Davie, R.F.
1979: Gold Deposits of Ontario, Part 2: Part of District of Cochrane, Districts of Muskoka, Nipissing, Parry Sound, Sudbury, Timiskaming, and Counties of Southern Ontario; Ontario Geological Survey, Mineral Deposits Circular 18, 253p.