关键词: 海底大地电磁探测, 地壳电性结构, 卫星同步

Abstract: Because of the difficulties to obtain the conductivity of the rock on the seafloor, no marine electromagnetic prospecting has been done in the field of geophysical prospecting in China till now. But the electrical parameter is the better one in reflecting the lithology and physical state of rock than some other parameters. The development of marine electromagnetic method is strongly needed. The marine magnetotellurics, which studies the distribution of conductivity of medium in different depths through collecting magnetotelluric data on the seafloor, is proved to be an effective method. After two years of hard work, we have accomplished the study of marine magnetotelluric prospecting. Due to the rapid development of society, the need for mineral and energy resources is presently increasing fast, which leads to the decrease of the deposit of important mineral, oil and natural gas, and the lack of the targets for prospecting and exploiting on the land. Relatively, the abundant sea resource is rather attractive. Therefore it is imperative to develop the methods for prospecting the resources on the seafloor in China Sea, which will provide the broad applied prospects for the marine electromagnetic methods.

Key words: Marine magnetotelluric method, Electrical structure