Ion Microprobe and Electron Microprobe Studies on Magnesium Isotopic Abundances in Olivine Minerals from the Allende Carbonaceous Chondrite (SIMS特集)
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概要
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Isotope ratios of 24Mg/25Mg and 26Mg/25Mg have been measured by an ion microprobe mass analyzer in three specimens of forsterite-rich olivine from the Allende carbonaceous chondrite (Fo95, Fo85 and Fo98). Prior to isotopic analyses, the mineral compositions of these specimens were identified by an electron probe microanalyzer. The ratios were compared with those for a terrestrial laboratory standard olivine (Fo94). About 5 permil excesses of 24Mg were found in two of those forsterite-rich olivine specimens from Allende analyzed. These excesses of 24Mg can be one of the evidences of the heterogeneity of the primordial solar nebula.
- 日本質量分析学会の論文
著者
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Uyeda Chiaki
Institute Of Earth And Planetary Science College Of General Education Osaka University
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Matsunami Satoshi
Department Of Earth Sciences Miyagi University Of Education
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Takeshi Hideo
Department of Geosciences, Faculty of Science, Naruto University of Education
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Okano Jun
Institute Of Geological Sciences College Of General Education Osaka University
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Nishimura Hiroshi
Department Of Applied Chemistry Faculty Of Engineering Osaka Institute Of Technology
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Nishimura Hiroshi
Department of Geosciences, Faculty of Science, Naruto University of Education
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Uyeda Chiaki
Institute of Geological Sciences, College of General Education, Osaka University
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Sakaguchi Hitomi
Department of Geosciences, Faculty of Science, Naruto University of Education
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