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Remnants of the early solar system water enriched in heavy oxygen isotopes

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Title: Remnants of the early solar system water enriched in heavy oxygen isotopes
Authors: Sakamoto, Naoya Browse this author
Seto, Yusuke Browse this author
Itoh, Shoichi Browse this author →KAKEN DB
Kuramoto, Kiyoshi Browse this author
Fujino, Kiyoshi Browse this author
Nagashima, Kazuhide Browse this author
Krot, Alexander N. Browse this author
Yurimoto, Hisayoshi Browse this author
Issue Date: 13-Jul-2007
Publisher: American Association for the Advancement of Science
Journal Title: Science
Volume: 317
Issue: 5835
Start Page: 231
End Page: 233
Publisher DOI: 10.1126/science.1142021
PMID: 17569827
Abstract: Oxygen isotopic composition of our solar system is believed to have resulted from mixing of two isotopically distinct nebular reservoirs, 16O-rich and 17,18O-rich relative to Earth. The nature and composition of the 17,18O-rich reservoir are poorly constrained. We report an in situ discovery of a chemically and isotopically unique material distributed ubiquitously in fine-grained matrix of a primitive carbonaceous chondrite Acfer 094. This material formed by oxidation of Fe,Ni-metal and sulfides by water either in the solar nebula or on a planetesimal. Oxygen isotopic composition of this material indicates that the water was highly enriched in 17O and 18O (δ17,18OSMOW = +180‰ per mil), providing the first evidence for an extremely 17,18O-rich reservoir in the early solar system.
Rights: This is the author's version of the work. It is posted here by permission of the AAAS for personal use, not for redistribution. The definitive version was published in SCIENCE, VOL 317, 2007-7-13, doi:10.1126/science.1142021
Type: article (author version)
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 圦本 尚義

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