Compositional trends and cooling rates of group IVB iron meteorites

Details Compositional trends and cooling rates of group IVB iron meteorites Compositional trends and cooling rates of group IVB iron meteorites

Apr 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984gecoa..48..805r&link_type=abstract

Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 48, April 1984, p. 805-813. Research supported by the Statens Naturvidens

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Chemical Composition, Cooling, Iron Meteorites, Meteoritic Composition, Computerized Simulation, Germanium, Kamacite, Magma, Neutron Activation Analysis, Nickel, Meteorites, Iron Meteorites, Composition, Cooling Rates, Ivb Meteorites, Neutron Activation Analysis, Cores, Formation, Concentration, Volatiles, Fractional Crystallization, Abundance, Comparisons, Naa, Outgassing, Computer Techniques, Simulations, Calculations, Nickel, Enrichment, Sulfur, Carbon, Phosphorous, Parent Bodies, Samples, Meteorite

Scientific paper

It is found, on the basis of new neutron activation data for group IVB, that log-element - log-Ni trends are best understood in terms of core formation and fractional crytstallizaion. The limited compositional range found in gorup IVB is thought to reflect the fact that, owing to the low concentrations of S, P, and C and the high concentration of Ni, the kx (the solid/liquid partition ratio) values are closer to unity than are those in other magmatic groups. Mean volatile abundances in group IVB are significantly lower than those found in any group of chondritic meteorites, indicating that these low abundances are not entirely the result of nebular processes and that planetary outgassing was also involved.

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