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| | Abstract | | Reflection seismic methods, which are used frequently for offshore surveys, are considered promising in exploring the ocean bottom hydrothermal deposits. In this study, the new reflection seismic method, using both seafloor based high frequency sound source and the vertical hydrophone arrays moored from the seafloor, is proposed. The practical experiments were done at the Izena Cauldron, Okinawa area on September 2011 and the data acquisition with 2kHz sound was successful. In addition, data processing using the seismic interferometry results in detecting more waves. On the other hand, there are several technical problems left, such as the shortage of the power from the source and the insufficient accuracy of the positioning. Field survey will be conducted at the Izena Cauldron in 2012, and through this survey, this method will be improved more practical in exploring ocean bottom hydrothermal deposits. |
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