Using Long Period Magnetotelluric Profile of Fengcheng of Shanghai-Huzhou of Zhejiang Province to Study Deep Electrical Structure

A magnetotelluric sounding (MT) profile from Fengcheng of Shanghai to Huzhou of Zhejiang province was conducted using GMS‐06 surveying system, high quality long period data over 4000 s were obtained. By inversion and processing, these MT data provide a basis for the studies of deep electrical and fault structures. Integrating with tipper interpretation result, gravity & magnetic data and updated seismic interpretation, new recognitions about the conductivity and fault structures are obtained. The styles of several large and deep faults such as Huzhou—Suzhou, Wuzhen—Majin, Fengjing—Chuansha and Taicang—Fengxian and their roles in controlling the regional tectonics are evaluated. The fault of Fengjing—Chuansha controls the nappe transition structure zone between Shanghai uplift and Huzhou—Nantong arched area. The main position of the fault of Taicang—Fengxian is deduced to be at the vicinity of Tinglin. Moreover, the electrical strata overlying on the high resistivity basement, the crustal high‐conductivity stratum existing in the west area of Huzhou—Suzhou fault, the bottom interface of lithosphere, are also revealed and interpreted.