Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published June 2009 | public
Journal Article

Non-equilibrium stable isotope partitioning in igneous processes?


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.

Additional Information

© 2009 Published by Elsevier Ltd.

Additional details

August 22, 2023
October 24, 2023