|Years of Operation:||1934 – 1957|
|Ounces olf Gold Produced:||585,690|
Young-Davidson Mine (Past Producer)
MAIN METALS: Au, Ag
Approximately 2 miles west-northwest of Matachewan, ^ mile southwest of Otisse Lake, in southeastern Powell Township. Shaft in claim MR5372. Open pit in claims MR5372 and MR5374. Latitude 47.950 , Longitude 80.690 . Map reference: ODM 2110, Powell and Cairo Townships.
The ore occurs in a stock (actually several parallel east-trending dikes which branch in places) of syenite porphyry which lies along the southern contact of the southern belt of Timiskaming meta-sediments with Keewatin metavolcanics. About 300 feet south of the open pit and shaft, Cobalt Group sedimentary rocks overlie all other formations. The main orebody is a tapering cone extending downward in the syenite porphyry beneath the open pit. The syenite porphyry consists of two main phases: the brown syenite porphyry which is the older of the two and the brick red syenite porphyry which hosts the ore and is intrusive into the brown variety.
The ore-bearing syenite porphyry contains 2 percent disseminated pyrite which carries 30 to 50 percent of the gold as fine included grains. Superimposed on this mineralization are near-microscopic fractures containing visible gold. The disseminated pyrite containing these fractures is ore if it averages more than 0.11 ounce of Au per ton. These features suggest that the orebody was a porphyry gold deposit.
OWNERSHIP: Young-Davidson Mines Limited.
1916: Discovery of gold on Davidson Creek by Jake Davidson.
1923-1925: Shaft to 200 feet, 1,747 feet of lateral development, and 6,659 feet of diamond-drilling by The Porcupine Goldfields Development and Finance Company Limited.
1933-1956: 600-ton mill erected in 1933 and open pit operations begun in 1934. On completion of mining in the open pit (from surface to the 865-foot level), shaft sunk to 1,075 feet, winze sunk from 463-foot level to depth of 1,530 feet and 26,202 feet of underground development carried out on seven levels. Work by Hollinger Consolidated Gold Mines Limited under an option agreement with Young-Davidson Mines Limited.
1964: One diamond-drill hole (607 feet) by Young-Davidson Mines Limited.
|Year||Gold||Silver||Ore Milled||Recovered Grade|
|(ounces)||(ounces)||(tons)||(ounce of Au per ton)|
CIMM 1948, Structural Geology of Canadian Ore Deposits, Vol.1, p.635.
ODM 1935, Vol.44, pt.2, p.31-36.
ODM 1967, GR51,p.39-43.
Resident Geologist’s Files, Ontario Ministry of Natural Resources, Kirkland Lake.
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.