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Jun WATANABE
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Hiroyuki TAKAHATA
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Koji UCHIYAMA
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Takamura TSUCHIYA
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Author's Organization:Department of Geology and Mineralogy, Faculty of Science, Hokkaido University Department of Geology and Mineralogy, Faculty of Science, Hokkaido University Department of Geology and Mineralogy, Faculty of Science, Hokkaido University Department of Geology and Mineralogy, Faculty of Science, Hokkaido University