On the chemical composition of L-chondrites

Details On the chemical composition of L-chondrites On the chemical composition of L-chondrites

Jul 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980stin...8027259n&link_type=abstract

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Computer Science

Chemical Composition, Chondrites, Enstatite, Heterogeneity, Radiochemistry, Trace Elements, Carbonaceous Materials, Mineralogy, Petrology

Scientific paper

Radiochemical neutron activation analysis of Ag, As, Au, Bi, Co, Cs, Ga, In, Rb, Sb, Te, Tl, and Zn and major element data in 14 L4-6 and 3 LL5 chondrites indicates that the L group is unusually variable and may represent at least 2 subgroups differing in formation history. Chemical trends in the S/Fe rich subgroup support textural evidence indicating late loss of a shock formed Fe-Ni-S melt; the S/Fe poor subgroup seemingly reflects nebular fractionation only. Highly mobile In and Zn apparently reflect shock induced loss from L chondrites. However, contrasting chemical trends in several L chondrite sample sets indicate that these meteorites constitute a more irregular sampling of, or more heterogeneous parent material than do carbonaceous or enstatite chondrites. Data for 15 chondrites suggest higher formation temperatures and/or degrees of shock than for LL5 chondrites.

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