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Geology and Ore Deposits of the Uncompahgre (Ouray) Mining District, Southwestern Colorado: Usgs Professional Paper 1753
Wilbur S. Burbank
(Author)
·
Robert G. Luedke
(Author)
·
Bibliogov
· Paperback
Geology and Ore Deposits of the Uncompahgre (Ouray) Mining District, Southwestern Colorado: Usgs Professional Paper 1753 - Burbank, Wilbur S. ; Luedke, Robert G.
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Synopsis "Geology and Ore Deposits of the Uncompahgre (Ouray) Mining District, Southwestern Colorado: Usgs Professional Paper 1753"
The Uncompahgre mining district, part of the Ouray mining district, includes an area of about 15 mi2 on the northwestern flank of the San Juan Mountains in southwestern Colorado from which ores of gold, silver, copper, lead, and zinc have had a gross value of $14 to 15 million. Bedrock within the district ranges in age from Proterozoic to Cenozoic. At least three major uplifts of the ancestral San Juan Mountains occurred during the Proterozoic and at the close of the Paleozoic and Mesozoic, respectively. The last event, known as the Laramide orogeny, locally was accompanied by extensive intrusion of igneous rocks. The principal ore deposits of the district were associated with crosscutting and laccolithic intrusions of porphyritic granodiorite formed during the Laramide orogeny. The ores were deposited chiefly in Paleozoic and Mesozoic sedimentary strata. Ore deposits range from low-grade, contact-metamorphic through pyritic base-metal bodies containing silver and gold tellurides and native gold to silver-bearing lead-zinc deposits.
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