Tephrochronologic Study of Two Piston Cores off Japan

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概要

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• A study of two piston cores from the Estase I cruise (R/V Jean Charcot), concerning volcanic ash layers interbedded with sediment from active continental margin off Japan, allows us to characterize a part of the late Quaternary explosive volcanic activity. It shows evidence of continuous acidic volcanic activity more or less potassic, with three basic ash layers (high-alkali-tholeiitic to low-alkali-tholeiitic affinity) in a East Honshu core, and two moderately potassic ash layers in a south-west Kyushu core. From geochemical studies and isotopic age determination of ash layers (^<18>O/^<16>O and ^<14>C), it was possible to correlate the basic ones of the East Tohoku core with the Nasu volcanic area and an acidic one of the south-west Kyushu core with the Aira-Tn ash (AT), 22000 years BP.

• 特定非営利活動法人日本火山学会の論文
• 1990-10-01

著者

• Fujioka K

  Ocean Research Institute University Of Tokyo

• Cadet Jean-paul

  Laboratoire De Geologic Structural U.p.m.c.

• CAMBRAY Herve

  Ocean Research Institute, University of Tokyo

• GUICHARD Francois

  Centre des Faibles Radioactivites, Laboratoire mixte CNRS-CEA

• FUJIOKA Kantaro

  Ocean Research Institute, University of Tokyo

• POUCLET Andre

  Departement des Sciences de la Terre, Universite d'Orleans

• Fujioka Kantaro

  Ocean Research Institute University Of Tokyo

• Pouclet Andre

  Departement Des Sciences De La Terre Universite D'orleans

• Cambray Herve

  Ocean Research Institute University Of Tokyo:laboratoire De Geologic Structural U.p.m.c.

• Guichard Francois

  Centre Des Faibles Radioactivites Laboratoire Mixte Cnrs-cea

関連論文

• Tephrochronologic Study of Two Piston Cores off Japan
• GEOLOGY OF VOLCANOGENIC SEDIMENTS OF THE JAPAN TRENCH AREA AND TERTIARY EXPLOSIVE VOLCANISM OF THE NE JAPAN ARC
• Deep-Sea Photographss of the Northwestern and Central Pacific Ocean : An Invitation to Deep-Sea Environment

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