Early Miocene parallel dike swarms in the Tsuruga Bay area, back-arc side of central Japan
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概要
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We analyzed Early Miocene dike swarms in the Tsuruga Bay area, Fukui Prefecture, Japan, with the aim of understanding the stress field that accompanied the formation of the Japan Sea back-arc basin. The dikes have coherent strikes of N50-60゜E and are about 20 Ma in age, based on new K/Ar data and previous radiometric ages. The dominant NE-SW strike is consistent with the trends of other 20-Ma parallel dike swarms found on the back-arc side of central Honshu, indicating a regional tectonic stress with a NE-SW maximum horizontal compressive axis and a NW-SE minimum principal stress axis. The back-arc region of central Honshu was probably subject to a NW-SE extension at 〜20Ma.
- 2009-02-15
著者
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Hoshi Hiroyuki
Department Of Earth Sciences Aichi University Of Education
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Hoshi Hiroyuki
Department Of Applied Physics Faculty Of Engineering Hokkaido University
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Takagawa Miho
Department of Earth Sciences, Aichi University of Education
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Takagawa Miho
Department Of Earth Sciences Aichi University Of Education
関連論文
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