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^(238)U/^(235)U Ratios of Anagrams: Angrites and Granites

Tissot, F. L. H. and Dauphas, N. (2012) ^(238)U/^(235)U Ratios of Anagrams: Angrites and Granites. In: 43rd Lunar and Planetary Science Conference, March 19-23, 2012, The Woodlands, TX.

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Significant ^(238)U/^(235)U variations have been documented in meteoritic [e.g. 1-4] and terrestrial [5] samples, which can affect Pb-Pb ages. In most cases, the cause of these variations is not understood. Here, we report an extensive study of the U isotopic composition of planetary crustal rocks. Determination of ^(238)U/^(235)U ratio in angrites is critical to establish their age: an important anchor in early solar system chronology [6,7]. The extent to which the protolith of terrestrial granites affects their U isotopic composition is unknown. We report high-precision U isotope measurements of angrites and terrestrial granites to address these two outstanding questions in solar system chronology and crustal differentiation.

Item Type:Conference or Workshop Item (Paper)
Related URLs:
URLURL TypeDescription Website
Tissot, F. L. H.0000-0001-6622-2907
Dauphas, N.0000-0002-1330-2038
Additional Information:© 2012 Lunar and Planetary Institute.
Record Number:CaltechAUTHORS:20180618-131630058
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:87193
Deposited By: Tony Diaz
Deposited On:18 Jun 2018 20:32
Last Modified:09 Mar 2020 13:18

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