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Tomo Shibata
Geological Survey of Hokkaido
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Fujio Akita
Geological Survey of Hokkaido
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Noritoshi Okazaki
Geological Survey of Hokkaido
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Norio Matsumoto
Geological Survey of Japan, AIST
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Hiroaki Takahashi
Hokkaido University Graduate School of Science
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Ryuji Ikeda
Hokkaido University Graduate School of Science