SEGJ Technical Conference


Development of precise magnetic and electrical exploration systems for sea-floor hydrothermal deposit


Abstract
Seabed resources like sea-floor hydrothermal deposits have recently focused renewed attention behind the international situation for natural resources. From such a standpoint, we have been developing new electrical and magnetic exploration systems by using AUV, ROV, and deep-tow system in order to estimate structures of the sea floor in detail. Since this study started with the financial support of the MEXT in 2008, we made magnetic and electrical exploration systems on an experimental basis. The magnetic exploration system was tested using AUV Urashima and towing vehicle Yokosuka Deep-Tow in the Kumano Basin, using a helicopter above Aogashima volcano, and using titanium towing frame specially designed for a magnetometer in the Bayonnaise submarine caldera area. The electrical exploration system was tested using the R/V Hokuto of Tokai University off Miho in Suruga Bay, and using ROV Kaiko 7000II in the Japan Trench. These tests gave us basic data of the systems for the platforms and the confirmation of their performance. They showed that the systems approached to practical tools. We proceed with the development on basis of the trial results. We will report the present state of the development of the systems.