瞬变电磁系统探测海底电导率的研究

选择在海洋工程与环境地质等方面有应用前景的海洋瞬变电磁法作为研究对象．研究了在高导海水中探测海底电导率的电磁感应理论，研制了共轴水平磁偶极-偶极装置（HRHR）的瞬变探测系统和解释软件．经东海海域实地试验，取得了良好效果，证实了瞬变电磁探测的有效性和方法优势．目前，它可作为海底地质填图的主要手段．经拓展后可用于海底分层和基底深度的探测．

THE RESEARCH OF CONDUCTIVITY ON SEA-FLOOR BY TRANSIENT ELECTROMAGNETIC SYSTEM

Transcient electromagntic method, which has been applied to oceanic engineering,environmental geology and so on, is choosen to be a sort of research object for filling in the gaps in the field of oceanic electrical method in China. So, the theory on electromagnetic responses in conductive sea water, which is affected by the conduchvity of sea-floor, has been studied, and the device of coaxil horizontal magnetic diple-diple(HRHR) transient EM system as well as the modeling software are introduced in this paper. Effectiveness and unique advantages of transient EM method have been proved by the test carried out in the East sea, China. At present transient EM method as a major tool for geological mapping of sea-floor is applied in the sea-floor modeling and in the deep surveying of sea-floor after some improvements.