Computer Science
Scientific paper
Feb 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988gecoa..52..539c&link_type=abstract
Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 52, Feb. 1988, p. 539-553.
Computer Science
36
Chemical Composition, Melting Points, Olivine, Pyroxenes, Temperature Dependence, Trace Elements, Error Analysis, Free Energy, Gas Mixtures
Scientific paper
This paper presents a systematic thermodynamic analysis of the effects of temperature and composition on olivine/melt and low-Ca pyroxene/melt partitioning. Experiments were conducted in several synthetic basalts with a wide range of Fe/Mg, determining partition coefficients for Eu, Ca, Mn, Fe, Ni, Sm, Cd, Y, Yb, Sc, Al, Zr, and Ti and modeling accurately the changes in free energy for trace element exchange between crystal and melt as functions of the trace element size and charge. On the basis of this model, partition coefficients for olivine/melt and low-Ca pyroxene/melt can be predicted for a wide range of elements over a variety of basaltic bulk compositions and temperatures. Moreover, variations in partition coeffeicients during crystallization or melting can be modeled on the basis of changes in temperature and major element chemistry.
Colson Russell O.
McKay Gordon A.
Taylor Lawrence A.
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