|
| | Abstract | | For the recent national requirements of marine natural resources, Japan Agency of Marine-Earth Science and Technology (JAMSTEC) have carried out various observations and research around the Okinawa Trough We have complied and collected bathymetry, gravity and magnetic data. Moreover, the detailed bathymetry and backscatter images using an AUV also have collected around the Iheya area, other caldera and ridge zone. It is very important for the research of the origin of the submarine massive sulfides (SMS) to visualize the underground structure including the hydrothermal fluid distribution. However, few suitable techniques of geophysical exploration for its evaluation have been developed. We have promoted magneto-telluric surveys and DC resistivity and CSEM surveys in/around the Iheya North knoll area. To investigate the detailed resistivity structure, we developed ocean bottom electro-magnetometers and newly designed transmitter. Moreover, a powerful analysis tool and database system with visualization tool are required to evaluate many observation data and analyzed results effectively. We have tried to develop the system using GIS software and a SQL database for the data integration. |
|
|
|
| |
|