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Trethewey Mine, Coleman Township, Cobalt area, Cobalt-Gowganda region, Timiskaming District, Ontario, Canada

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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.


Mineral List


9 valid minerals.

Regional Geology

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

Paleoproterozoic
1600 - 2500 Ma



ID: 624198
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

Lithology: Conglomerate, sandstone, silstone, argillite

Reference: Ontario Geological Survey. 1:250 000 scale bedrock geology of Ontario. ISBN 978-1-4435-5705-4. Miscellaneous Release–Data 126 - Revision 1. [1]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License



This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Ontario Dept. of Mines, 1968, MRC No.10, Silver Cobalt Calcite Vein Deposits of Ontario, by A.O.Sergiades

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