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The AAPG/Datapages Combined Publications Database
CSPG Bulletin
Abstract
Abstracts: Mineralogy of the No. 2 Zone Eldorado Mine, Port Radium Northwest Territories
The Eldorado ore occurs in large dilatant zones in Proterozoic sedimentary and volcanic rocks. This is partly due to the greater competency of the silicified sediments, and partly due to chemical control by the sediments on the hydrothermal solutions.
The hydrothermal solutions deposited many metallic minerals. Twenty-three hypogene metallic minerals have been identified including three rare bismuth sulfosalts, schirmerite, klaprothite and guanajustite.
Conditions of deposition ranged from mesothermal to epithermal, with the possible exception of massive quartz and massive pitchblende which were probably deposited at higher but still mesothermal temperatures.
Two periods of hypogene pitchblende deposition have been identified. The earlier pitchblende was oxidized before the second stage of deposition. Supergene pitchblende of recent age was also observed.
End_of_Record - Last_Page 452-------
ACKNOWLEDGMENTS AND ASSOCIATED FOOTNOTES
1962, University of Alberta, M.Sc.
Copyright © 2004 by The Society of Canadian Petroleum Geologists. All Rights Reserved.
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