Oxygen isotopic compositions of petrographically described inclusions from Antarctic unequilibrated ordinary chondrites

元データ 国立極地研究所

概要

Several inclusions from the Antarctic unequilibrated ordinary chondrites (ALH-764 (LL3), ALH-77015 (L3) and Y-790448 (L3)) were excavated and their petrography, chemical and oxygen isotopic compositions were determined. The coherent data indicates that precursors of the ordinary chondrites consist of a mixture of two different solid materials. One is a pre-existing solid enriched in albite component and depleted in ^<16>O component and the other is a solid depleted in albite component and enriched in ^<16>O component. The latter solid material may be an evaporation residue of the former solid material in an ambient gas.

著者

Ikeda Yukio Department Of Earth Sciences Ibaraki University
Onuma Naoki Department Of Earth Sciences Faculty Of Science Ibaraki University
Onuma Naoki Department Of Chemistry The University Of Tsukuba
Yanai Keizo National Institute of Polar Research
Mayeda T.K. Enrico Fermi Institute, The University of Chicago
Clayton R.N. Enrico Fermi Institute, The University of Chicago
Ikeda Yukio Department Of Earth Sciences Faculty Of Science Ibaraki University
Mayeda T.k. Enrico Fermi Institute The University Of Chicago
Clayton R.n. Enrico Fermi Institute The University Of Chicago
Ikeda Yukio Department Of Earth Science Faculty Of Science Ibaraki University
Ikeda Yukio Department of Earth Sciences, Faculty of Science, Ibaraki University

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