Molybdenum- and Tungsten-Isotopic Signatures in the Early Solar System

Details Molybdenum- and Tungsten-Isotopic Signatures in the Early Solar System Molybdenum- and Tungsten-Isotopic Signatures in the Early Solar System

Aug 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999nag..conf.7637y&link_type=abstract

Ninth Annual V. M. Goldschmidt Conference, August 22-27, 1999, Cambridge, Massachusetts, abstract no. 7637

Physics

1

Chronometers, Isotopic Labeling, Molybdenum Isotopes, Tungsten Isotopes, Solar System Evolution, Fractionation, Iron Meteorites, Refractories, Technetium Isotopes, Hafnium Isotopes

Scientific paper

The Hf-182-W-182 and 97 Tc-97 Mo systems are ideal chronometers to address the problems related the time scale of planetary accretion and metal-silicate differentiation (core-mantle fractionation at a planetary scale). These elements are refractory and significant parent/daughter fractionation is expected to take place during the segregation of metal phase from the chondritic reservoir. In principle, the segregation of metal before the extinction of Hf-182 and Tc-97 will produce a deficit and excess of W-182 and Mo-97 in the iron meteorites. Such coupled effects were reported for the Toluca (IAB) iron meteorite. Additional information is contained in the original extended abstract.

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