Trethewey Mine, Coleman Township, Cobalt area, Cobalt-Gowganda region, Timiskaming District, Ontario, Canada
|Latitude & Longitude (WGS84):||47° 24' 0'' North , 79° 41' 7'' West|
|Latitude & Longitude (decimal):||47.40000,-79.68528|
|Köppen climate type:||Dfb : Warm-summer humid continental climate|
A silver mine discovered in 1904 by W.G.Threthwey. It was operated by various companies (1906-1956) as an underground mine by 6 shafts, the deepest being 186ft. Total produced to the end of 1956 was 7,260,000 oz. Ag and 217,000lbs Co. It was later mined by Agnico with a large open pit that mined through the old workings.
9 valid minerals.
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
1600 - 2500 Ma
|Huronian Supergroup (2.2 Ga to 2450 Ma); Cobalt Group; Gowganda Formation|
Age: Proterozoic (1600 - 2500 Ma)
Stratigraphic Name: Huronian Supergroup (2.2 Ga to 2450 Ma); Cobalt Group; Gowganda Formation
Comments: Southern and Superior Province
Reference: Ontario Geological Survey. 1:250 000 scale bedrock geology of Ontario. ISBN 978-1-4435-5705-4. Miscellaneous Release–Data 126 - Revision 1.