中文摘要：

近些年来，随着地球科学的进展，大陆岩石圈导电性结构的研究越来越引起人们的重视。这是因为固体地球物理学研究的结果告诉我们，有关大陆岩石圈导电性的研究有可能为当前地球科学各领域的进展提供重要的物理依据。大地电磁测深是从导电性的角度研究地壳和上地幔结构不可缺少的方法。长期以来，国内对此开展了大量工作：而当前，随着科学技术发展，无论是仪器、数据采集或数据处理和反演技术都有了长足的进步。中国的大地电磁测深已实现超宽频带、高精度测量技术；在数据处理和反演等方面也基本与国际先进技术接轨。因此，在2001年，沿着山西应县到山东商河，布置一条大地电磁测深剖面进行研究。采用现代先进的大地电磁数据处理技术和快速松弛二维反演方法获得该剖面二维电性结构模型，从而充分展示了华北地区岩石圈电性结构的特点。从电性特征上讲，华北岩石圈以太行山前断裂为界划分为东、西两区。东区为低阻区，上地壳电性结构基本与华北裂谷系的隆、坳构造格局相对应，岩石圈的电导最高达30000S，远远大于强烈活动的安第斯山岩浆弧区和西藏高原岩石圈的电导。西区为高阻区，太行山和恒山的岩石圈为高阻块体，表现出稳定大陆区岩石圈导电性结构的特点。但恒山高阻块体之下发现一组向西缓倾的高导层，其电导率为0，04~o，25S／m，顶面在20krn深处。底面深约40km。研究结果表明，华北裂谷盆地范围内地壳的电阻率很低，属于良导电性的地壳，这可能是由华北裂谷盆地的壳、幔热结构、热状态所决定的。根据对大陆电阻率模型的讨论。推测鄂尔多斯地块的上地幔也许不存在前人所界定的“软流圈”的性状：而华北裂谷盆地虽然是中新生代构造活动区，活动性较强，但与年轻的火山岛弧区或剧?

英文摘要：

In recent years, with the development of geosciences, there has been a growing interest in the study of electrical conductivity structure of the continental lithosphere, which is because the results of solid geophysical research show that the study of electrical conductivity structure of the continental lithosphere can provide important physical grounds for research in other areas of geosciences. Magnetotelluric （MT） sounding is an indispensable geophysical method for the study of the structures of the crust and upper mantle in the context of electrical conductivity. For a long time, great efforts have been devoted to the study of MT technologies in China. At present, with the development of science and technology, major advances have been made in instrumentation, data acquisition or processing technology and inversion technology. In China, superwide-band and high-precision MT survey techniques have been applied and data processing and inversion technologies have been improved greatly and in the main are compatible with the world＇s advanced technologies. Therefore, an MT profile was run along the Yingxian, Shanxi, to Shanghe, Shandong, in 2001. A 2D conductivity structure model of the profile, obtained by using the advanced MT data processing method and rapid release inversion （RRI）, shows the features of the conductivity structure of the lithosphere in North China. According to the electrical features, the North China lithosphere is divided into the eastern and western parts by the frontal fault of the Taihang Mountains. The eastern part is characterized by low resistivity and the western part by high resistivity. In the eastern part, the electrical structure of the upper curst corresponds roughly to a tectonic framework of alternating uplifts and depressions in the North China rift system and the lithosphere conductance reaches a maximum of 30 000 S, being far greater than that of the Andes magma arc area with strong volcanic activities and that of the Tibetan Plateau. In the western part, the lithosp