Date of Award
Bachelor of Science in Geological Engineering
Dr. Eugene S. Perry
Mr. Curtis L. Graverson
The manganese minerals occur in the peripheral zone of the Butte district with quartz in veins, which at depth contain galena and sphalerite closely associated with silver-bearing minerals. The manganese oxides are all oxidation products formed by weathering of primary rhodochrosite or rhodonite.
Gilmore, Emmett M., "Manganese Oxide Deposits Near Butte and Development Since 1942" (1948). Bachelors Theses and Reports, 1928 - 1970. 267.
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