000 02278nam  2200325za 4500
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008170726s1967    oncab   ob   f000 0 eng d
040 |aCaOODSP|beng
043 |an-cn-on
0861 |aM38-8/44E-PDF|zM38-8/44
1001 |aPetruk, W., |d1930-
24510|aOre deposits of the Cobalt area |h[electronic resource] / |cW. Petruk, Mineral Sciences Division.
260 |aOttawa : |bQueen's Printer, |c1967.
300 |ap. 123-136 : |bill., maps
4901 |aReprint series ; |vRS 44
500 |aCover title.
500 |a"Reprinted from Guidebook - Eastern Ontario and Western Quebec, pp. 123-136, August-September [...]."
500 |aHistorical publication digitized from print 2017 [by Natural Resources Canada].
504 |aIncludes bibliographical references.
5203 |a"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.
69207|2gccst|aMetals
69207|2gccst|aMinerals
7101 |aCanada. |bNatural Resources Canada.
7101 |aCanada. |bDepartment of Energy, Mines and Resources.
7101 |aCanada. |bMines Branch.
830#0|aReprint series - Dept. of Energy, Mines and Resources, Mines Branch ;|vRS 44|w(CaOODSP)9.834843
85640|qPDF|s5.85 MB|uhttps://publications.gc.ca/collections/collection_2017/rncan-nrcan/M38-8/M38-8-44-eng.pdf