Other
Scientific paper
Mar 1970
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1970gecoa..34..307p&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 34, Issue 3, pp.307-322
Other
96
Scientific paper
Partition coefficients for K, Rb, Sr, and Ba distributed between plagioclase, K-feldspar, clinopyroxene, orthopyroxene, mica, hornblende, garnet, and olivine phenocrysts and their igneous matrix materials, have been determined by a mass-spectrometric stable isotope dilution technique. Typical differentiation of a basalt through fractional crystallization results in higher K, Ba, and Rb concentrations, slightly higher K/Sr, Ba/Sr and Rb/Sr ratios, and slightly lower K/Rb and Ba/Rb ratios in the liquid. K/Ba may be a useful solar-system indexing criterion. The high K/Rb ratio and other trace element characteristics of andesine-labradorite anorthosites reflect their origin as plagioclase cumulates. Partition coefficients have been applied to a simple model of basalt genesis.
Philpotts John A.
Schnetzler Charles C.
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