Trial exploration for hydrothermal activity using acoustic measurements at the North Iheya Knoll

• Kasaya Takafumi

  Research and Development Center for Earthquake and Tsunami, Japan Agency for Marine-Earth Science and Technology (JAMSTEC) Project Team for Development of New-generation Research Protocol for Submarine Resources, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)

• Machiyama Hideaki

  Project Team for Development of New-generation Research Protocol for Submarine Resources, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)

• Kitada Kazuya

  Project Team for Development of New-generation Research Protocol for Submarine Resources, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)

• Nakamura Kentaro

  Project Team for Development of New-generation Research Protocol for Submarine Resources, Japan Agency for Marine-Earth Science and Technology (JAMSTEC) Graduate School of Engineering, The University of Tokyo

抄録

A survey method using acoustic equipment has attracted recently interest of researchers for the research of gas bubbles and hydrothermal activity because gas bubbles and hot water exposed from hydrothermal vents produce acoustic impedance anomalies in cold seawater. We tried a new hydrothermal exploration using a hull-mounted Multi Beam Echo Sounder (MBES) and a high-frequency MBES system mounted on AUV URASHIMA as one approach in the first stage of a comprehensive hydrothermal deposit survey process including geophysical exploration. The surveys using the MBES system were conducted at the North Iheya Knoll. First, we discovered heretofore unidentified hydrothermal activity at two areas of the North Iheya Knoll using hull-mounted MBES. Then, MBES data obtained during the AUV dive provided detailed positions of new hydrothermal activity zone. The existence of previously unknown hydrothermal vent was identified through ROV dives using our estimated plume position data for the North Iheya Knoll. These achievements demonstrate clearly that the acoustic survey using shipboard MBES and a vehicle with high-frequency MBES are useful as one approach for hydrothermal exploration.

収録刊行物

• ＧＥＯＣＨＥＭＩＣＡＬ　ＪＯＵＲＮＡＬ

  ＧＥＯＣＨＥＭＩＣＡＬ　ＪＯＵＲＮＡＬ 49 (6), 597-602, 2015

  一般社団法人日本地球化学会

キーワード

• MBES
• acoustic measurements
• hydrothermal activity
• water column
• North Iheya Knoll

詳細情報

• CRID: 1390001204554185600
• NII論文ID: 130005112457
• NII書誌ID: AA00654975
• DOI: 10.2343/geochemj.2.0389
• ISSN: 18805973
• ISSN: 00167002
• NDL書誌ID: 026964751
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I026964751
• Web Site: https://www.jstage.jst.go.jp/article/geochemj/49/6/49_2.0389/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可