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Actinide Chemistry of Allende Components

Murrell, M. T. and Burnett, D. S. (1984) Actinide Chemistry of Allende Components. Meteoritics, 19 (4). pp. 275-276. ISSN 0026-1114. doi:10.1111/j.1945-5100.1984.tb00840.x.

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U and Th in inclusions. Previous reports of high Th/U in Allende Ca,Al-rich inclusions (Boynton, 1978; Chen and Wasserburg, 1981; Stapanian, 1981) may indicate that U was not acting as a refractory element. The apparent ease of Th/U fractionation in the earliest material makes the ubiquity of Th/U = 3.8 in the solar system hard to understand. U-Th fission track radiography offers the possibility of a better understanding of actinide chemistry in Allende Ca,Al-rich inclusions. Volatility and valence differences between Th and U make these elements potentially useful in distinguishing between primary (condensation?) characteristics and those produced later by alteration. A preliminary examination of TS-23 (a type B inclusion provided by L. Grossman, 1975) shows U to be highly enriched in the inclusion rim. This result is qualitatively similar to that found for U and Th in type A inclusions by Stapanian (1981).

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Burnett, D. S.0000-0001-9521-8675
Additional Information:© 1984 The Meteoritical Society.
Issue or Number:4
Record Number:CaltechAUTHORS:20150506-144742141
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ID Code:57291
Deposited By: Tony Diaz
Deposited On:06 May 2015 22:06
Last Modified:10 Nov 2021 21:10

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