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

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概要

• 論文の詳細を見る

• 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.

• American Association for the Advancement of Scienceの論文
• 2007-07-13

著者

• Itoh Shoichi

  Department Of Natural History Sciences Hokkaido University

• Yurimoto Hisayoshi

  Department of Natural History Sciences, Hokkaido University

関連論文

• Remnants of the early solar system water enriched in heavy oxygen isotopes
• Discovery of 17,18 O-rich material from meteorite by direct-imaging method using stigmatic-SIMS and 2D ion detector
• Non-chondritic oxygen isotopic component of metals in a noble-gas-rich chondrite : vestige of stellar wind from the protosun?

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