Preliminary Magnetotelluric Modeling in the Nikko Volcanic Area. Potential Break of Fluid Trap by Volcanic Intrusion.

• Ogawa Y.

  Geological Survey of Japan

• Honkura Y.

  Department of Earth and Planetary Sciences, Tokyo Institute of Technology

• Ohtani F.

  Geological Survey of Japan

• Kuroki H.

  Department of Earth and Planetary Sciences, Tokyo Institute of Technology

• Mitsuhata Y.

  Japan National Oil Cooperation

書誌事項

タイトル別名

• Preliminary Magnetotelluric Modeling in

抄録

We collected magnetotelluric data in the Nikko volcanic area in the period range from 0.01 to 10 sec. Impedance data were decomposed with the regional strike direction N0°E and were analized by two-dimensional inversions including static shifts as model parameters. The major model features are: (1) southern conductor at 8 km depth which is consistent with the seismic S-wave reflectors, (2) northern conductor located at 5 km depth, consistent with the seismic attenuation zones, and (3) a resistitive gap in between, consistent with the magnetic body inferred from aeromagnetic data. The two conductors probably imply trapped free water at around 400°C. The resistor in between implies the volcanic body, which intruded the crust and may have broken the regime of trapped free water.

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　ｇｅｏｍａｇｎｅｔｉｓｍ　ａｎｄ　ｇｅｏｅｌｅｃｔｒｉｃｉｔｙ

  Ｊｏｕｒｎａｌ　ｏｆ　ｇｅｏｍａｇｎｅｔｉｓｍ　ａｎｄ　ｇｅｏｅｌｅｃｔｒｉｃｉｔｙ 49 (8), 1073-1078, 1997

  地球電磁気・地球惑星圏学会

キーワード

• General Earth and Planetary Sciences
• General Environmental Science

詳細情報

• CRID: 1390001206511045504
• NII論文ID: 10002204338
• NII書誌ID: AA00698879
• DOI: 10.5636/jgg.49.1073
• ISSN: 21855765
• ISSN: 00221392
• NDL書誌ID: 4287756
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4287756
• 本文言語コード: en
• データソース種別:
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  • CiNii Articles
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