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Algorithmic modifications extending MELTS to calculate subsolidus phase relations

Ghiorso, Mark S. and Asimow, Paul D. (1998) Algorithmic modifications extending MELTS to calculate subsolidus phase relations. American Mineralogist, 83 (9-10). pp. 1127-1132. ISSN 0003-004X.

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Algorithmic modifications to the MELTS software package are presented in order that calculations of heterogeneous phase equilibria can be performed in the subsolidus. Methods are presented for: (1) selecting an "initial guess assemblage" that satisfies the bulk composition constraints; (2) detecting saturation of new phases (including liquid) in an assemblage; (3) adding and removing phases from the assemblage without adjusting the system bulk composition; and (4) constraining the assemblage to a fixed f_(O2). These methods have O2 been added to MELTS, allowing it to calculate heterogeneous phase equilibria with or without liquid, closed or open to O, and with fixed intensive variables (P,T), (P,S), (P,H), or (V,T). Applications include fractional melting calculations, metamorphic phase equilibria, and geophysical models of subsolidus regions of the Earth.

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Asimow, Paul D.0000-0001-6025-8925
Additional Information:© 1998 Mineralogical Society of America. Manuscript received: April 13, 1998; manuscript accepted: June 10, 1998; paper handled by David M. Jenkins. The authors thank Denton Ebel, Alex Navrotsky, and Tracy Rushmer for helpful comments on the manuscript, and David Jenkins for editorial handling. Paul D. Asimow is supported by a postdoctoral research fellowship from Lamont-Doherty Earth Observatory. M.S.G. acknowledges material support from the National Science Foundation (OCE-9529790).
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Lamont-Doherty Earth Observatory postdoctoral research fellowshipUNSPECIFIED
Issue or Number:9-10
Record Number:CaltechAUTHORS:20120830-132227508
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:33711
Deposited On:30 Aug 2012 21:40
Last Modified:03 Oct 2019 04:12

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