Imaging hydrothermal mineral deposits area by reflection seismic processing using Vertical Cable Seismic and Ocean Based Sound Source

Yutaro Seino, Hidekazu Tokuyama, Juichiro Ashi, Kenji Tara, Eiichi Asakawa, Yasuhiro Asano, Akira Saito

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    For the estimation of the hydrothermal mineral deposits reserves, geophysical exploration is indispensable, and the practical geophysical survey was conducted in 2013 at the Izena cauldron in the Okinawa trough, known distribution area of the hydrothermal deposits. Shallow seismic data were successfully acquired by the Vertical Cable Seismic method with the Ocean Based Sound Source (VCS-OBSS system). The OBSS system can generate high frequency waves of 1kHz Ricker wavelet, and high resolution data were acquired at this complex hydrothermal area. The data were processed by the three-dimensional Pre-Stack Depth Migration (3D-PSDM) method, and the output volume size was 160m × 220m × 400m. As a result of the interpretation, several continuous reflectors were detected, considering to be indicating the buried sulfide ore mound and the stockwork zone. This study concludes that the VCS-OBSS system is one of the effective geophysical methods for the exploration of the ocean bottom hydrothermal mineral deposits.

    Original languageEnglish
    Title of host publicationTechno-Ocean 2016: Return to the Oceans
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    Pages22-27
    Number of pages6
    ISBN (Electronic)9781509024452
    DOIs
    Publication statusPublished - 2017 Mar 30
    Event16th Techno-Ocean, Techno-Ocean 2016 - Kobe, Japan
    Duration: 2016 Oct 62016 Oct 8

    Other

    Other16th Techno-Ocean, Techno-Ocean 2016
    CountryJapan
    CityKobe
    Period16/10/616/10/8

    Keywords

    • 3D-PSDM
    • buried sulfide ore mound
    • hydrothermal mineral deposits
    • Izena cauldron
    • Okinawa trough
    • stockwork zone
    • VCS-OBSS system

    ASJC Scopus subject areas

    • Oceanography
    • Water Science and Technology
    • Energy Engineering and Power Technology
    • Ocean Engineering
    • Instrumentation

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