寄書 K-Ar Ages of Andesites from Two Volcanic Arrays in Western Chugoku, Southwest Japan

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概要

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• The volcanic front in the Southwest Japan Arc formed relative to the subducting Philippine Sea Plate. In the west Chugoku district, the volcanic front changes direction from E-W to NNE-SSW. Twenty-two Quaternary lava domes in this area can be topographically classified into two arrays (East and West arrays) based on the degree of dissection. K-Ar age results show that domes of the East array formed earlier (0.6-0.3 Ma) than those of the West array (0.2 Ma-recent). The two arrays in different ages may result from the migration of volcanic front caused by westward migration of the PSP slab.

• 特定非営利活動法人日本火山学会の論文
• 2002-11-29

著者

• NAGAO KEISUKE

  Laboratory for Earthquake Chemistry, Graduate School of Science, The University of Tokyo

• Murata Mamoru

  Department of Earth Sciences,Faculty of Science,Naruto University of Education

• Murata Mamoru

  Department Of Geosciences Faculty Of Science Naruto University Of Education

• Nagao Keisuke

  Laboratory For Earthquake Chemistry Graduate School Of Science The University Of Tokyo

• Nagao Keisuke

  Laboratory For Earthquake Chemistry Faculty Of Science The University Of Tokyo

• FURUYAMA Katsuhiko

  Department of Bio- and Geosciences, Graduate School of Science, Osaka City University

• Nagao K

  Laboratory For Earthquake Chemistry Graduate School Of Science The University Of Tokyo

• Furuyama Katsuhiko

  Department Of Bio- And Geosciences Graduate School Of Science Osaka City University

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