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| | Abstract | | Various marine geophysical exploration method based on the electro-magnetic method have used as a useful method for the potential quantity estimation of submarine hydrothermal ore deposit as is incase with land ore deposit. We found some self-potential anomalies related with the hydrothermal activity in the observed electric field data around the Iheya North knoll hydrothermal area. To verify the relationship between the SP anomaly and hydrothermal area including the hydrothermal deposit, we carried out the electric field observation in the Izena hydrothermal deposit area. As a result, negative SP anomalies was detected above known hydrothermal mounds, an active chimney, and a flat seafloor with no hydrothermal sign. Moreover, it became clear that the amplitude and short wave length variation were related to the observation height. |
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