A fluorimetric study of the thorium-morin system
Robert G. Milkey, Mary H. Fletcher
1956, Trace Elements Investigations 589
Thorium reacts with morin to yield a yellow complex that fluoresces when irradiated with ultraviolet light. The effect on the fluorescence of such variable as concentration of acid, alcohol, thorium, morin, and complex; time, temperature, and wavelength of exciting light are studied to determine experimental conditions yielding maximum fluorescence....
Controlled atmospheres for spectrochemical analysis
C. S. Annell
1956, Trace Elements Investigations 653
X-ray powder data for uranium and thorium minerals
Clifford Frondel, Daphne Riska, Judith Weiss Frondel
1956, Trace Elements Investigations 575
The U.S. Geological Survey has in preparation a comprehensive volume on the mineralogy of uranium and thorium. This work has been done as part of a continuing systematic survey of data on uranium and thorium minerals on behalf of the Division of Raw Materials, U.S. Atomic Energy Commission. Pending publication of...
Results of geologic drilling, 1953, land-pebble phosphate district, Florida
James Bachelder Cathcart, Laurence James McGreevy
1956, Trace Elements Investigations 576
Host rocks and their alterations as related to uranium-bearing veins in the United States
George W. Walker
1956, Trace Elements Investigations 638
This paper, dealing with the different kinds of host rocks and their alterations associated with uranium-bearing veins in the United States, is a chapter of a comprehensive report entitled , "Geology of uranium-bearing vein deposits in the United States," in preparation by George W. Walker, Frank W. Osterwald, and others....
The determination of uranium (IV) in apatite
Roy S. Clarke Jr., Zalman S. Altschuler
1956, Trace Elements Investigations 637
Geologic and mineralogic evidence indicate that the uranium present in apatite may proxy for calcium in the mineral structure as U(IV). An experimental investigation was conducted and chemical evidence was obtained that establishes the presence of U(IV) in apatite. The following analytical procedure was developed for the determination of U(IV). Carbonate-fluorapatite...
Abundance and distribution of uranium and thorium in zircon, sphene, apatite, epidote, and monazite in granitic rocks
Patrick M. Hurley, Harold W. Fairbairn
1956, Trace Elements Investigations 636
Analyses were made of uranium and thorium in ziircon, sphene, apatite, epidote, and monazite separated as accessory minerals from samples of granitic rock from widely scattered localities to indicate the abundance and distribution of these two elements among the five mineral phases. For any pair of mineral phases the distribution...
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...
Uranium in the auriferous conglomerates at the Canavieiras gold mine, State of Bahia, Brazil
Max Gregg White
1956, Trace Elements Memorandum 945
Geologic features of areas of abnormal radioactivity south of Ocala, Marion County, Florida
Gilbert H. Espenshade
1956, Trace Elements Memorandum 941
Areas of abnormal radioactivity south of Ocala, Marion County, Fla., discovered in 1953 by aerial survey, were investigated by surface examination and by 10 power auger drill holes. Inter-bedded clay, clayey sand, and uraniferous phosphorite occur in the areas of anomalous radioactivityo Miocene fossils occur at three localities in these...
Occurrence of selenium in sulfides from some sedimentary rocks of the western United States
Robert G. Coleman, Maryse Delevaux
1956, Trace Elements Investigations 632
Investigations of the minor- and trace-element content of sulfides associated with uranium ore deposits from sandstone-type deposits have shown that selenium commonly substitutes for sulfur. The Morrison formation and Entrada sandstone of Jurassic age and the Wind River formation of Eocene age seem to be seleniferous stratigraphic zones; sulfides deposited...
The absorption spectra of the complexes of uranium (VI) with some β-diketones
H.I. Feinstein
1956, Trace Elements Investigations 631
The absorption spectra of the complexes of uranium (VI) with four β-dike tones were determined under various conditions of pH, concentration of uranium, and alcohol concentration. Under optimum conditions, the maximum molar absorptivity (31,200) is obtained using 2-furoyltrifluoroacetone. This compares with about 4,000 and 19,000 for the thiocyanate and dibenzoylmethane...
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,...
Sources of the elements in the sandstone-type uranium deposits of the Colorado Plateau
Eugene M. Shoemaker, W.L. Newman, A.T. Miesch
1956, Trace Elements Investigations 629
Sandstone-type uranium deposits of the Colorado Plateau are epigenetic. Certain elements have been added locally to the sandstone host to form the deposits; the added fraction of each element in the deposits is call extrinsic to distinguish it from the part present in the original unmineralized host. The principal extrinsic...
Semiquantitative spectrographic analysis and rank correlation in geochemistry
Francis J. Flanagan
1956, Trace Elements Investigations 628
The rank correlation coefficient, rs, which involves less computation than the product moment correlation coefficient, r, can be used to indicate the degree of relationship between two elements. The methods is applicable in situations where the assumptions underlying distribution correlation theory may not be satisfied. Semiquantitative spectrographic analyses can be...
Thick sequences of silicate and carbonate rocks of sedimentary origin in North America an interim report
John David Love
1956, Trace Elements Memorandum 1088
Thick sequences of silicate and carbonate rocks of sedimentary origin have been investigated in 64 areas in North America. The areas containing the thickest and most homogeneous stratigraphic sections more than 1,000 feet thick, buried at depths greater than 10,000 feet are: 1. Uinta Basin, Utah, where the Mancos shale...
Stratigraphy of middle Tertiary rocks in part of west-central Florida
Wilfred James Carr, Douglas C. Alverson
1956, Trace Elements Investigations 625
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....
Selected annotated bibliography of the geology and occurrence of uranium-bearing marine black shales in the United States
Carolyn E. Fix
1956, Trace Elements Investigations 535
The bibliography consists of annotations or abstracts of selected reports that pertain to the geology and occurrence of uranium in marine black shales and their metamorphic equivalents in the United States. Only those reports that were available to the public prior to June 30, 1956, are included. Most of the...
Selected annotated bibliography of the uranium geology of igneous and metamorphic rocks in the United States and territories
Diane Curtis
1956, Trace Elements Investigations 534
Notes on the geology of uranium
Montis Ruhl Klepper, D.G. Wyant, Donald Cave Duncan, Walter Danilchik, M.H. Staatz, Harley Barnes, V.E. McKelvey
1956, Trace Elements Investigations 529
The selective precipitation of thorium iodate from a tartaric acid-hydrogen peroxide medium : Application to the rapid spectrophotometric determination of thorium in silicate rocks and in ores
F. S. Grimaldi, Lillie B. Jenkins, Mary H. Fletcher
1956, Trace Elements Investigations 489
Stratigraphy of the uranium-bearing rocks of the Karnes County area, south-central Texas -- a preliminary report
D. Hoye Eargle, John L. Snider
1956, Trace Elements Investigations 488
The gold pan as a quantitative tool
Paul Kellogg Theobald Jr.
1956, Trace Elements Investigations 487
Classification and distribution of uranium-bearing veins in the United States
George Walton Walker, Frank W. Osterwald
1956, Trace Elements Investigations 486
