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Some possible geologic relationships in the formation of uranium (super 235) from curium (super 247)

Hans H. Adler
Some possible geologic relationships in the formation of uranium (super 235) from curium (super 247)
Economic Geology and the Bulletin of the Society of Economic Geologists (June 1961) 56 (4): 689-694

Abstract

A mechanism for the derivation of U (super 235) from Cm (super 247) is considered as a possible source of U (super 235) enrichment in radiative rare-earth minerals. The presence of Cm (super 247) in early earth materials is predictable on the basis of synthesis through nuclear reactions and from extrapolations of abundances of lighter nuclides. The chemistry of Cm reflects a geochemical similarity to rare-earth elements and possible incorporation in rare-earth minerals. The amount of enrichment of U that might be expected from Cm (super 247) decay is calculated for monazite for several geologic ages. Within the limits of the parameters considered, Cm (super 247) would not provide sufficient U (super 235) enrichment to be of economic consequence, but its possible existence in early geologic time may be of interest in geochronology studies. Underestimation of Cm (super 247) abundance may affect significantly the probability for finding interesting variations in U (super 235) :U (super 238) ratios.


ISSN: 0361-0128
EISSN: 1554-0774
Coden: ECGLAL
Serial Title: Economic Geology and the Bulletin of the Society of Economic Geologists
Serial Volume: 56
Serial Issue: 4
Title: Some possible geologic relationships in the formation of uranium (super 235) from curium (super 247)
Author(s): Adler, Hans H.
Pages: 689-694
Published: 196106
Text Language: English
Publisher: Economic Geology Publishing Company, Lancaster, PA, United States
Accession Number: 1961-011014
Categories: Geochronology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: table
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Bibliography and Index of North American Geology, U. S. Geological Survey, Reston, VA, United States
Update Code: 1961
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