Chondrule Precursors: The Nature of the S- and Ni-bearing Phases(s)

Details Chondrule Precursors: The Nature of the S- and Ni-bearing Phases(s) Chondrule Precursors: The Nature of the S- and Ni-bearing Phases(s)

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27.1485z&link_type=abstract

Lunar and Planetary Science, volume 27, page 1485

Mathematics

Logic

2

Chondrules, Condensation, Nickel, Precursors, Sulfide

Scientific paper

Lauretta and Fegley showed that troilite made by S condensation on kamacite should include a significant amount of Ni, but they reported being unsuccessful in their search for Ni-bearing troilite in chondrites. We show the various opaque associations (OAs) found in veneers around chondrules in primitive and less primitive chondrites to be the result of parent body decomposition under different conditions of an initial Ni-bearing monosulfide solid solution (Ni-MSS). OAs in the less melted (finest grained) Semarkona chondrules are similar to the ones in veneers and differ from those in coarser grained chondrules. As fine-grained chondrules must have kept a better memory of their precursor minerals, this indicates that the dominant opaque phase in chondrule precursors was Ni-MSS, the logical end member of S condensation on kamacite in the solar nebula.

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