Computer Science
Scientific paper
Jun 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977e%26psl..35..247l&link_type=abstract
Earth and Planetary Science Letters, Volume 35, Issue 2, p. 247-257.
Computer Science
40
Scientific paper
We present major and trace element data for olivines and rapidly quenched groundmass material separated from eight samples of basaltic rock. From these data apparent olivine/liquid distribution coefficients (D) for the elements Mg, Mn, Ni, Co, Cr, Sc, Na, Sm, and Ca have been calculated. Petrographic and electron microprobe studies indicate that olivines in most of these samples are but slightly zoned and groundmass glasses are essentially uniform in composition; these data suggest that the co-existing olivine-groundmass pairs are in equilibrium. In addition, olivine crystallization temperatures were calculated using experimental calibrations of ln D vs. 1/T for the elements Mg, Fe, Mn, Ni, and Co. A high degree of concordancy for the resulting temperatures, based on five different elements for most samples, also suggests that olivine-groundmass equilibrium was obtained. We conclude that the apparent olivine/liquid D's derived from this study are representative of equilibrium D's, but emphasize that variations in temperature, and possibly bulk composition, strongly affect such D's in natural magmas.
Leeman William P.
Scheidegger K. F.
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