上越沖, 海底表層メタンハイドレート賦存域での深海底構造・微地形調査について Micro-topography and Shallow Sub-bottom Structure on the Gas Hydrate Area off Joetsu City, Niigata, Japan : DAI-PACK Mapping Study

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著者

    • 上嶋 正人 JOSHIMA Masato
    • 産業技術総合研究所地質情報研究部門 Institute of Geology and Geo-information, Institute of Advanced Industrial Science and Technology
    • 西村 清和 NISHIMURA Kiyokazu
    • 産業技術総合研究所地質情報研究部門 Institute of Geology and Geo-information, Institute of Advanced Industrial Science and Technology
    • 佐藤 幹夫 SATO Mikio
    • 産業技術総合研究所地圏資源環境研究部門 Institute for Geo-Resources and Environment, Institute of Advanced Industrial Science and Technology
    • 松本 良 MATSUMOTO Ryo
    • 東京大学大学院理学系研究科地球惑星科学専攻 Department of Earth and Planetary Science, University of Tokyo

抄録

 A remarkable reflection record of a deeper part (> 200 m) appeared on the fish finder. Gas bubbling was confirmed directly by the ROV (Hyper-Dolphin/Natsushima) diving off Joetsu in the eastern part of the Sea of Japan. Visualization, using geographical feature mapping and side-scan sonar images of the topography, was useful for investigating methane hydrate and associated carbonates at the sea bottom. Besides, a sub-bottom profiling study produced useful information for detecting buried methane hydrate and carbonates, because some of them had been identified previously by piston core sampling studies. <br> DAI-PACK (Deep sea Acoustic Imaging Package) was set on the ROV (Hyper-Dolphin) and the survey extended to a length of approximately 20 km and covered a total area of 900,000. A detailed distribution of patch-shaped rough geographical features, some fault-like lineaments and sub-bottom profile records (about a maximum of 15 m deep), were obtained by five dives during the NT07-20 and the NT08-09 cruises. The round-shaped patches of rough geographical features are thought to have been formed by gas supplied to the surface through fault systems.

収録刊行物

  • 地學雜誌

    地學雜誌 118(1), 72-92, 2009-03-25

    Tokyo Geographical Society

参考文献:  14件中 1-14件 を表示

被引用文献:  3件中 1-3件 を表示

各種コード

  • NII論文ID(NAID)
    10030364848
  • NII書誌ID(NCID)
    AN00322536
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    0022135X
  • NDL 記事登録ID
    10232553
  • NDL 雑誌分類
    ZM41(科学技術--地球科学)
  • NDL 請求記号
    Z15-169
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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