I-129/I-127 variations among enstatite chondrites

Details I-129/I-127 variations among enstatite chondrites I-129/I-127 variations among enstatite chondrites

Jan 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988gecoa..52..101k&link_type=abstract

Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 52, Jan. 1988, p. 101-111.

Computer Science

12

Chondrites, Enstatite, Iodine Isotopes, Radioactive Isotopes, Chemical Composition, Data Reduction, Metallicity, Meteorites, Iodine, Isotopes, Stony Meteorites, E Chondrites, Enstatites, Samples, Meteorite, Composition, Isotopic Ratios, Comparisons, Procedure, Laboratory Studies, Kota-Kota, St. Sauveur, Daniel'S Kuil, Hvittis, Blithfield, Khairpur, Atlanta, Happy Canyon, Age, Formation, Chemistry, Heterogeniety, Classification, Chronology

Scientific paper

The iodine isotopic compositions and corresponding I-Xe ages were obtained for eight enstatite chondrites, bringing the total number of enstatite chondrites examined by the I-Xe technique to 11. Iodine isotopic compositions of these 11 chondrites indicate a well-defined hiatus correlated with the hiatus in chemical composition defining the two distinct enstatite groups: EH(4,5) and EL(6). Judging by the I-129/I-127 ratios and assuming that both the EH and EL groups originated from a reservoir with a uniform initial iodine isotopic composition, the EH(4,5) chondrites were estimated to be about 4 mln older than the El chondrites.

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