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Numerical modeling of diffusive exchange of stable isotopes in the lithologic setting

Eiler, John M. and Baumgartner, Lukas P. and Valley, John W. (1991) Numerical modeling of diffusive exchange of stable isotopes in the lithologic setting. Abstracts with Programs - Geological Society of America, 23 (5). A447-A447. ISSN 0016-7592.

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The emergence of micro-analytical methods of measuring stable isotopic ratios (Valley and Graham, 1991, Crowe et al., 1990, Sharp, 1990) has made it increasingly important to develop models predicting the effects of diffusive exchange of stable isotopes between coexisting phases within realistic petrologic environments. Previous models have used the concept of diffusional closure (Dodson, 1973), which assumes a rapidly diffusing infinite reservoir exchanging with a mineral of interest; an assumption which will not hold for many polyphase interdiffusion problems of petrologic interest. We have used a numerical model for interdiffusion using the Crank-Nicholson finite difference formulation, assuming rapid grain boundary diffusion and net mass balance to link the individual grains.

Item Type:Article
Additional Information:© 1991 Geological Society of America.
Issue or Number:5
Record Number:CaltechAUTHORS:20130710-132338362
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:39288
Deposited By: Tony Diaz
Deposited On:17 Jul 2013 23:11
Last Modified:03 Oct 2019 05:05

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