File:Native silver from the McKinley-Darragh Mine,Cobalt, Ontario.jpg

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Description Silver (3.0 cm across at its widest) from the McKinley-Darragh Mine, southern side of Cobalt Lake, Cobalt Mining District, southeastern Timiskaming District, southeastern Ontario, southeastern Canada. Native silver at this mine occurs in near-vertical hydrothermal veins consisting of silver+cobalt-arsenides/sulfosalts+carbonate. The veins cut through conglomerates, sandstones, and siltstones of the Coleman Member, Gowganda Formation (Paleoproterozoic, 2.288 b.y.). Published literature on the Cobalt Mining District has shown that the hydrothermal veins intruded through their host rocks at about 2.217 billion years (~mid-Paleoproterozoic). Hydrothermal vein mineralization appears to have been generated by, or related to, intrusion of the Nipissing Diabase Sill, a widespread, 300 meter thick unit in this area.
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Source Flickr: Silver-Silver (3.0 cm across at its widest) from the McKinley-Darragh Mine,Ontario,Canada
Author James St. John
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This image, which was originally posted to Flickr, was uploaded to Commons using Flickr upload bot on 18 March 2014, 23:15 by Tillman. On that date, it was confirmed to be licensed under the terms of the license indicated.
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current23:15, 18 March 2014Thumbnail for version as of 23:15, 18 March 2014904 × 702 (169 KB)Flickr upload bot (talk | contribs)Uploaded from http://flickr.com/photo/47445767@N05/8458888982 using Flickr upload bot

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