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Page 6923, results 173051 - 173075

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Not all publications have extents, not all extents are completely accurate
Selected annotated bibliography of the geology of uraniferous and radioactive native bituminous substances, exclusive of coals, in the United States
Harriet Nell Jones
1956, Trace Elements Investigations 536
Native bituminous substances are divided into two groups, 1) bitumens and, 2) pyrobitumens. Bitumens are composed principally of hydrocarbons substantially free from oxygenated bodies, are fusible, and are soluble in carbon disulfide. Native bitumens occur in liquid and solid forms. The native liquid bitumens include all petroleums or crude oils....
Detailed mineral and chemical relations in two uranium-vanadium ores
Robert M. Garrels, E. S. Larsen III, A. M. Pommer, R. G. Coleman
1956, Trace Elements Investigations 635
Channel samples from two mines on the Colorado Plateau have been studied in detail both mineralogically and chemically. A channel sample from the Mineral Joe No. 1 mine, Montrose County, Colo., extends from unmineralized rock on one side, through a zone of variable mineralization, into only weakly mineralized rock. The unmineralized...
A dithizone method for the determination of lead in monazite
R. A. Powell, C. A. Kinser
1956, Trace Elements Investigations 630
In determining lead in monazite [(Ce,La,Th)PO4]--to be used as the basis for geologic age measurements--it was necessary to eliminate interferences due to the presences of phosphates of thorium and the rare-earth metals. The method, in which monazite samples are attacked with hot concentrated sulfuric acid, taken up with dilute nitric acid,...
Uranium content and leachability of some igneous rocks and their geochemical significance
George J. Neuerburg, John C. Antweiler, Barrie H. Bieler
1956, Trace Elements Investigations 626
The uranium content and its leachability in 442 igneous rocks if wide variety were measured. Four-gram samples, crushed below 38 mesh, were leached in in 0.05 M HNO3 for half an hour at 80 to 85° C; the leachate and undissolved residue were analyzed fluorimetrically. This study explored the relation of...