Experimental partitioning studies near the Fe-FeS eutectic, with an emphasis on elements important to iron meteorite chronologies (Pb, Ag, Pd, and Tl)

Details Experimental partitioning studies near the Fe-FeS eutectic, with an emphasis on elements important to iron meteorite chronologies (Pb, Ag, Pd, and Tl) Experimental partitioning studies near the Fe-FeS eutectic, with an emphasis on elements important to iron meteorite chronologies (Pb, Ag, Pd, and Tl)

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993gecoa..57..453j&link_type=abstract

Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 57, no. 2, p. 453-460.

Mathematics

10

Eutectics, Inorganic Sulfides, Iron Meteorites, Meteoritic Composition, Partitions (Mathematics), Chemical Composition, Cosmochemistry, Isotope Separation, Microbeams, Trace Elements, Meteorites, Iron Meteorites, Samples, Meteorite, Laboratory Studies, Experiments, Partitioning, Chronology, Thallium, Isotopes, Composition, Lead, Fractionation, Silver, Palladium, Sulfide, Schreibersite, Gold, Metal, Troilite, Partition Coefficients, Incompatible Elements, Nickel, Procedure, Abundance, Trace Elements, Micropr

Scientific paper

Partitioning coefficients for metal/sulfide liquid, troilite/sulfide liquid, and schreibersite/sulfide liquid were determined for Ag, Au, Mo, Ni, Pd, and Tl (using EMPA and proton-induced X-ray microprobe and ion microprobe analyses) in order to understand the chronometer systems of iron meteorites. In general, the obtained schreibersite/metal and troilite/metal partition coefficients for 'compatible' elements were quite similar to those inferred from natural assemblages, reinforcing an earlier made conclusion that there is a class of elements for which experimental troilite/metal and schreibersite/metal partition coefficients approximate those inferred from natural samples. The consistency between experimental and natural assemblages, however, was not observed for Ag, Pb, and Tl, indicating that the abundances of these elements determined in 'metal' and 'troilite' separates from iron meteorites are influenced by trace minerals that concentrate incompatible elements.

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