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Underground borate mining, Kern county, Calif
Borate deposits formed during Upper Miocene epoch in playas together with arkosic and sandy sediments over olivine basalt flows; between 1927 and 1957, sodium borate minerals were mined by underground methods; in 1957, surface mining methods were initiated; stoping, extraction, pillar support, methods of artificial support, and other factors that affect structural characteristics of these mines.
Underground borate mining, Kern county, Calif
Borate deposits formed during Upper Miocene epoch in playas together with arkosic and sandy sediments over olivine basalt flows; between 1927 and 1957, sodium borate minerals were mined by underground methods; in 1957, surface mining methods were initiated; stoping, extraction, pillar support, methods of artificial support, and other factors that affect structural characteristics of these mines.
Underground borate mining, Kern county, Calif
U S Bur Mines -- Report Investigations
Obert, L. (author) / Long, A.E. (author)
1962
67 pages
Report
English
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Underground borate mining, Kern County, Calif.
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