Weathering of Antarctic meteorites investigated from contents of Fe3+, chlorine, and iodine

T. Shinonaga, K. Endo, M. Ebihara, K. G. Heumann, H. Nakahara

研究成果: Article査読

15 被引用数 (Scopus)

抄録

The chemical states of iron in fourteen Antarctic H chondrites were studied by means of Mössbauer spectroscopy. Fe3+, Fe3+, troilite, and Fe-Ni alloy were analyzed in all meteorites. Determinations of Cl and I in 28 Antarctic H, L, and LL chondrites were carried out by radiochemical neutron activation analysis, and those in three Antarctic eucrites were carried out by isotope dilution mass spectrometry. The results ranged from 90 to 1700 ppm for Cl and from 0.07 to 5 ppm for I in ordinary chondrites, and from 30 to 330 ppm for Cl and from 1 to 9 ppm for I in eucrites. On the basis of the data on halogens and the Mössbauer spectroscopy, terrestrial weathering of Antarctic meteorites are discussed. The relative amount of Fe3+ in H chondrites correlates positively with chlorine and iodine contents, and Fe2+ and troilite correlate negatively. Chlorine shows a higher enrichment in ordinary chondrites than in eucrites whereas the I enrichment seems to be larger in Fe-Ni alloy-poor meteorites.

本文言語English
ページ(範囲)3735-3740
ページ数6
ジャーナルGeochimica et Cosmochimica Acta
58
17
DOI
出版ステータスPublished - 1994 9
外部発表はい

ASJC Scopus subject areas

  • Geochemistry and Petrology

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