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Page 7124, results 178076 - 178100

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Value of domestic production of minerals from various classes of rocks
Vincent E. McKelvey, J.E. Crawford, D.F. Davidson, Robert Leland Boardman
1950, Economic Geology (45) 470-479
Fluids and sedimentary rocks accounted for 48 and 36 percent, respectively, of the total value of the 1946 domestic mineral production. The epigenetic (vein and replacement) and metamorphic deposits each contributed 6 percent of the total, and residual and igneous deposits accounted for 3 and 1 percent, respectively. Fuels were...
Dispersion of copper from the San Manuel copper deposit, Pinal County, Arizona
T. S. Lovering, Lyman C. Huff, H. Almond
1950, Economic Geology (45) 493-514
At San Manuel, near Tucson, Arizona, recent churn drilling has blocked out large reserves of low-grade "porphyry copper" ore. This virgin deposit has a small outcrop and seems ideally suited for a geochemical study of the dispersion pattern produced by weathering in a desert climate. Samples of soils, alluvium, ground...
The appraisal of ore reserves at a Japanese copper mine
John J. Collins
1950, Economic Geology (45) 568-573
Estimates of ore reserves at major Japanese metal mines seem, at first glance, to be readily understandable to American engineers and geologists. Close scrutiny, however, generally reveals unexpected features at each mine. For example, the Hitachi copper mine formerly segregated its developed ore reserve into positive and probable on the...
"Lockhartia" cushmani Applin and Jordan and notes on two previously described foraminifera from tertiary rocks in Florida
Esther R. Applin, Louise Jordan
1950, Journal of Paleontology (24) 474-478
This paper discusses changes made in the names of three foraminiferal species originally described by the writers, with particular emphasis on "Lockhartia" cushmani Applin and Jordan. The internal characters of this form are fully described and compared with the diagnostic characteristics of the genus Lockhartia Davies and with the geno-lectotype...
A preliminary report on the rapid fluorimetric determination of uranium in low-grade ores
F. S. Grimaldi, Harry Levine
1950, Trace Elements Investigations 47
A simple and very rapid fluorimetric procedure is described for the determination of uranium in low-grade shale and phosphate ores. The best working range is from 0.001 to about 0.04 percent U. The procedure employs batch extraction of uranium nitrate by ethyl acetate, using aluminum nitrate as the salting agent,...