Ore deposits of the Cobalt area: M38-8/44E-PDF

"The Cobalt area is underlain by Keewatin volcanic and sedimentary rocks, pre-Algoman intrusive rocks, Algoman granite, Huronian sediments, Nipissing diabase, and late Keweenawan diabase dykes. Silver deposits occur as individual veins and clusters of veins in Keewatin rocks, pre-Algoman larnprophyre dykes, Huronian sediments, and Nipissing diabase. The veins are generally nearly vertical and are up to several hundred feet in vertical and horizontal extent. They are composed of carbonate minerals and contain shoots of silver ore, cobalt arsenides, and nickel arsenides. The silver ore shoots contain up to 8,000 ounces silver per ton of vein material. The silver in them is present as masses, veinlets, and separate grains. The masses and separate grains occur in arsenides, carbonate veins, and adjacent wall rock; the veinlets occur in fractures in the veins and wall rock, and along the boundaries between the veins and wall rock"--Abstract, p. 123.

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Department/Agency Natural Resources Canada. Dept. of Energy, Mines and Resources. Mines Branch.
Title Ore deposits of the Cobalt area
Series Title Reprint series ;
Publication Type Series - View Master Record
Language [English]
Format Electronic
Electronic Document

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Note Cover title. "Reprinted from Guidebook - Eastern Ontario and Western Quebec, pp. 123-136, August-September [...]." Historical publication digitized from print 2017 [by Natural Resources Canada].
Date 1967.
Number of Pages p. 123-136 :
Catalogue Number
  • M38-8/44E-PDF
Departmental Catalogue Number 300123
Subject Terms Metals, Minerals