Origin and Thermal History of Fe-Ni Metal in Primitive Chondrites

Details Origin and Thermal History of Fe-Ni Metal in Primitive Chondrites Origin and Thermal History of Fe-Ni Metal in Primitive Chondrites

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aspc..341..407c&link_type=abstract

Chondrites and the Protoplanetary Disk, ASP Conference Series, Vol. 341, Proceedings of a workshop held 8-11 November 2004 in Ka

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Recent work on the high temperature origins of chondritic Fe-Ni metal is reviewed. Emphasis is placed on the interplay between metal and silicate during chondrule formation, and on the chemical processes most responsible for metal formation, including volatilization/condensation, redox reactions with silicate, and desulfurization of FeS and other sulfides. Four specific chondrite metal settings are considered in depth: CR chondrites, in which the metal-chondrule interaction is most easily observed; ordinary chondrites, whose metal is also chondrule-processed but more metamorphosed than that of the CRs; CH and CB chondrites, whose metal appears to be largely produced by condensation; and CAI metal, which is highly enriched in refractory siderophile elements and records extremely high temperature processing.

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