Mathematics – Logic
Scientific paper
May 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975gecoa..39..689d&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 39, Issue 5, pp.689-712
Mathematics
Logic
74
Scientific paper
Plagioclase feldspar/magmatic liquid partition coefficients for Sr, Ba, Ca, Y, Eu 2+ , Eu 3+ and other REE have been determined experimentally at 1 atm total pressure in the temperature range 1150-1400°C. Natural and synthetic melts representative of basaltic and andesitic bulk compositions were used, crystallizing plagioclase feldspar in the composition range An 35 -An 85 . Partition coefficients for Sr are greater than unity at all geologically reasonable temperatures, and for Ba are less than unity above approximately 1060°C. Both are strongly dependent upon temperature. Partition coefficients for the trivalent REE are relatively insensitive to temperature. At fixed temperature they decrease monotonically from La to Lu. The partition of Eu is a strong function of oxygen fugacity. Under extreme reducing conditions D Eu approaches the value of D Sr .
Drake Michael J.
Weill Daniel F.
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