Phosphides and P-rich Sulfides in the Mighei (CM) Chondrite

Details Phosphides and P-rich Sulfides in the Mighei (CM) Chondrite Phosphides and P-rich Sulfides in the Mighei (CM) Chondrite

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27..939n&link_type=abstract

Lunar and Planetary Science, volume 27, page 939

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Chondrites: Cm, Condensation, Phosphide, Solar Nebula, Sulfide: Phosphorous-Rich

Scientific paper

All chondrites are depleted in moderately volatile elements as compared to CI chondrites. The distribution of such elements between minerals in chondrites could provide us with some clues to understand the reason for the depletion. Our study of CM carbonaceous clasts from the Erevan howardite has shown that P and some other moderately volatile elements could have a chalcophilic behaviour in CM chondrites and could possibly be condensed into sulfides and phosphides. The goal of this work was to search for P-bearing phases in the Mighei chondrite, which is a typical representative of CM chondrites. As a result we show that P-rich sulfide and phosphide grains and aggregates could indeed be a main primary carrier for P and some other moderately volatile elements. A separation of such phases from the solar nebula gas could significantly alter the concentrations of these elements in the nebula and hence could provide a mechanism for the depletions observed in chondrites.

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