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Non-equilibrium stable isotope partitioning in igneous processes?

Eiler, John M. and Valley, John W. and Stolper, Edward M. (2009) Non-equilibrium stable isotope partitioning in igneous processes? Geochimica et Cosmochimica Acta, 73 (13). A321. ISSN 0016-7037.

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Studies of the stable isotope compositions of igneous rocks commonly assume that crystallization occurs under conditions of melt/solid equilibrium and that disequilibrium fractionations, when observed, reflect mixing processes. However, igneous phenocrysts commonly exhibit oscillatory, sector, and more complex zoning of major and trace elements that could be produced by diffusion-limited transport near the crystal/melt interface and/or by partitioning into structurally anomalous surface sites. And, melt-phase inter-diffusion is known to lead to gradients in stable isotope compositions. We look for evidence that stable isotope compositions of phenocrysts could reflect such disequilibrium during growth.

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Stolper, Edward M.0000-0001-8008-8804
Additional Information:© 2009 Published by Elsevier Ltd.
Issue or Number:13
Record Number:CaltechAUTHORS:20130726-095536159
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Official Citation:Goldschmidt Abstracts 2009 – E, Geochimica et Cosmochimica Acta, Volume 73, Issue 13, Supplement, June 2009, Pages A318-A347, ISSN 0016-7037,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:39610
Deposited By: Tony Diaz
Deposited On:29 Jul 2013 21:51
Last Modified:03 Oct 2019 05:08

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