00000nam 2200000za 4500 9.840389 CaOODSP 20221107151829 cr ||||||||||| 170726s1967 oncab ob f000 0 eng d CaOODSP eng n-cn-on M38-8/44E-PDF M38-8/44 Petruk, W., 1930- Ore deposits of the Cobalt area [electronic resource] / W. Petruk, Mineral Sciences Division. Ottawa : Queen's Printer, 1967. p. 123-136 : ill., maps Reprint series ; RS 44 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]. Includes bibliographical references. "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. gccst Metals gccst Minerals Canada. Natural Resources Canada. Canada. Department of Energy, Mines and Resources. Canada. Mines Branch. Reprint series - Dept. of Energy, Mines and Resources, Mines Branch ; RS 44 (CaOODSP)9.834843 PDF 5.85 MB https://publications.gc.ca/collections/collection_2017/rncan-nrcan/M38-8/M38-8-44-eng.pdf 300123