Goreva, J. S. and Burnett, D. S. (2000) Origin of Thorium/Uranium Variations in Carbonaceous Chondrites. Meteoritics and Planetary Science, 35 (S5). A61. ISSN 1086-9379. https://resolver.caltech.edu/CaltechAUTHORS:20150507-071022957
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Abstract
Thorium-, U-, and Pb-isotopic analyses of a wide variety of planetary materials show that Th/U ratio (by weight) varies from 3.5 to 4.2. It is generally believed that chondritic meteorites contain refractory lithophile elements in a relative proportions close to solar, i.e., CI chondrites [1]. Surprisingly, a number of analyses of different types of carbonaceous chondrites show a large (at least a factor of 3) scatter in Th/U measurements [2]. The widest spread in Th/U is observed in the most primitive materials, CI-type chondrites. Cosmochronological models rely on the precise knowledge of the average solar system Th/U, therefore it is important to achieve a better understanding of the actinide chemistry in chondrites, e.g., what causes the variations in Th/U ratio.
Item Type: | Article | ||||||
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Additional Information: | © 2000 Meteoritical Society. Provided by the NASA Astrophysics Data System. | ||||||
Group: | UNSPECIFIED, Division of Geological and Planetary Sciences | ||||||
Issue or Number: | S5 | ||||||
Record Number: | CaltechAUTHORS:20150507-071022957 | ||||||
Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20150507-071022957 | ||||||
Official Citation: | Origin of Thorium/Uranium Variations in Carbonaceous Chondrites Goreva, J. S. & Burnett, D. S. Meteoritics & Planetary Science, vol. 35, Supplement, p.A61, 2000 | ||||||
Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||
ID Code: | 57309 | ||||||
Collection: | CaltechAUTHORS | ||||||
Deposited By: | Ruth Sustaita | ||||||
Deposited On: | 08 May 2015 04:53 | ||||||
Last Modified: | 09 Mar 2020 13:18 |
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