Abstract:Electromagnetic prospecting on the seafloor is one of the important geophysical methods to research the marine geology topics and the seafloor mineral resources. The data acquisition of remote reference is used to suppress interference and acquire the high quality data due to the magnetotelluric regional noise. The base station on land and surveying net under the water should follow simultaneous observation and the same location coordinates in the acquisition process. In order to solve the problems above, the high-precision clock, detecting posture device and automatic measurement circuit are equipped in marine magnetotelluric instrument. The instruments are placed point-to-point when the ship carries out marine experiments along scheduled routes. The characteristic of instrument flotage changes by remote control to let it automatic return to offing after the acquisition completes. Recent marine experiments indicate that the seafloor magnetotelluric prospecting in China have achieved u...更多tility and can offer high technology support in marine prospecting.