Development of new marine TDEM systems for the ocean bottom hydrothermal deposits

Keiko Nakayama, Akira Saito

    Research output: Contribution to journalArticle

    12 Citations (Scopus)

    Abstract

    Widely accepted Time Domain EM technologies for the onshore mineral explorations are applied to the ocean bottom mineral deposits, by developing new systems with ROV (remotely operated vehicle) and practical test surveys were conducted at Ogasawara and Okinawa areas. The first parts of these developments were already published by Nakayama et al. (2011), including 3D numerical simulation and analog water tank modeling. The two new measuring systems of moving and fixed types were introduced in 2012 and the test surveys were conducted and the developed systems are proved to be practical for the marine survey. We have made the measurements of the chemical and physical properties of the ocean bottom mineral ores samples, and some of the seabed sulfide ores showed higher IP effects than the onshore samples called Black Ore which is the same ocean bed hydrothermal origin (Shingyoji et al. 2009). Then we developed new inductive square array method to measure IP effects using TDEM transmitting coil as the eddy current source.

    Original languageEnglish
    Pages (from-to)850-854
    Number of pages5
    JournalSEG Technical Program Expanded Abstracts
    Volume33
    DOIs
    Publication statusPublished - 2014

    Fingerprint

    hydrothermal deposit
    ocean bottom
    Ores
    seafloor
    Deposits
    deposits
    minerals
    Mineral exploration
    Remotely operated vehicles
    Water tanks
    Mineral resources
    remotely operated vehicle
    ore mineral
    mineral exploration
    mineral deposit
    Eddy currents
    mineral deposits
    Chemical properties
    chemical property
    eddy

    ASJC Scopus subject areas

    • Geotechnical Engineering and Engineering Geology
    • Geophysics

    Cite this

    Development of new marine TDEM systems for the ocean bottom hydrothermal deposits. / Nakayama, Keiko; Saito, Akira.

    In: SEG Technical Program Expanded Abstracts, Vol. 33, 2014, p. 850-854.

    Research output: Contribution to journalArticle

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