Partitioning of chromium between silicate crystals and melts
J. S. Huebner, Bruce R. Lipin, L. B. Wiggins
Abstract
J. S. Huebner, Bruce R. Lipin, L. B. Wiggins
Abstract
Experiments were performed determining the distribution of chromium between olivine, pyroxenes, and melt at oxygen fugacity values near those of lunar rocks for a wide range of bulk compositions. The range of values of D-Cr (wt% of Cr2O3 in crystals/Cr2O3 in melt) is 0.6-1.3 for olivine and 1.6-3.5 for pyroxene; this ratio shows no obvious dependence on any experimental parameter.
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Experiments were performed determining the distribution of chromium between olivine, pyroxenes, and melt at oxygen fugacity values near those of lunar rocks for a wide range of bulk compositions. The range of values of D-Cr (wt% of Cr2O3 in crystals/Cr2O3 in melt) is 0.6-1.3 for olivine and 1.6-3.5 for pyroxene; this ratio shows no obvious dependence on any experimental parameter.
Key concepts: Olivine, Pyroxene, Mineral redox buffer, Silicate, Chromium, Mineralogy, Fugacity, Pigeonite