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| | Abstract | | We are developing Time Domain EM technologies for the exploration of the ocean bottom hydrothermal mineral deposits. The two measuring systems of moving type and fixed type were introduced in 2012. Currently, in addition to the two systems, the new measuring system of towed type by ROV has been developed. Towing type measurement system promotes highly efficient operation and shows as low noise levels as the fixed type. Test surveys using the towed type were conducted at Okinawa area of known seabed hydrothermal deposits. As the results, apparent resistivity anomalies are clearly shown at the mineral deposits, and the new system is proved to be more practical for the marine mineral deposit surveys than the previous two systems. |
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