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Uranium in the Copper King Mine, Black Hawk No. 1 Claim, Larimer County, Colorado

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Uranium in the Copper King Mine, Black Hawk No. 1 Claim, Larimer County, Colorado; 1951; TEM; 128-A; Granger, Harry Clifford; King, Robert Ugstad

Summary

Radioactive rock was discovered on the dump of the Copper King mine, sec. 8, T. 10 N., R. 72 W., Larirrier County, Colo., in the summer of 1949. The mine had been prospected intermittently for copper and zinc since 1,916, but there is no record that ore was produced. The country rock is pre-Cambrian granite containing many schist inclusions and narrow pegmatite dikes. Pitchblende disseminated in chlorite and sulfides was deposited in an obscure vein system during an intermediate stage of mineralization. This stage was preceded by biotitic alteration of amphiboles and sulfide deposition. The latest stage of mineralization is represented-by the limonitic dense quartz vein followed during mining. The uranium-bearing vein is about 2-3 [...]

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Harvested on Mon Jul 21 14:39:02 MDT 2014 from MODS XML Service

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Type Scheme Key
local-index unknown tem128A
local-pk unknown 72046
series unknown Trace Elements Memorandum

Citation Extension

journalTrace Elements Memorandum
parts
typePublication Place
valueWashington, D.C.
languageEnglish
citationTypeReport

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