Geology at Tungsten, Nevada, emphasizing structural aspects
Geological Sciences & Engineering
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Contact-metamorphic deposits containing scheelite are found at Tungsten, Pershing County, Nevada. Upper Triassic limestone beds were replaced by emanations from granodiorite stocks, forming tactite deposits bearing tungsten. The tracing of all limestone beds to the contact would locate all possible deposits of tungsten. Tracing of the limestone necessitates a method of correlating the limestones displaced or partially exposed. Studies were made on limestone thin sections, heavy-minerals, specific gravities, and assays for CaO, MgO, insoluble, R20o, and on hornfels, in order to find a reliable method of correlation. The calcium percentage, apparently unique to each bed of limestone, seems to be a property that could be used for correlating displaced portions of the bed.
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