| The southern margin of Ordos Liupanshan west tectonic belt, south of Northern Qilian - North Qinling tectonic belt across Weibei uplift, Weihe Graben, the southern tip of the western margin of North China Plate and other tectonic units of different levels, tectonic position in the special. The tectonic units are the structural characteristics of the main Caledonian, Yanshan and Himalayan tectonic movements such as the impact of a view The structure of the special position of the structure of the particular environment and its dynamics to create a superposition of different times, different types of lithostratigraphic units and complexity of the relationship between geological contacts, and hence the characteristics of the area present a very complex geological structure.In this paper, the theory of modern structural geology as a guide, the study area in a variety of geological and geophysical data interpretation and research, based on the study area of the basement and cover were studied in detail; divided the study area structural layer and the structural units, and analyzes the basic characteristics of tectonic units; the control of structural characteristics of the tectonic units of the regional fault system specialized study and discussion. Papers and understanding the results obtained are as follows:1. the study area and in Archean Paleoproterozoic to Mesoproterozoic crystalline basement metamorphic rocks, the overall trend for the north-east of the magnetic anomalies and magnetic anomalies were reflected isogram NE Long Pass the basic structure and white pattern, cloth Lattice gravity anomaly map is also better reflects the structural pattern.2. according to the study area cover different times of internal contacts between stratigraphic relations, sedimentary covers the study area will be divided into six main structural layer: Jinning structural layer, the Pan-African structural layer, structural layer Caledonian, Hercynian structural layer , Indo-China structural layer, structural layer Yanshanian.3. according to the study area boundary tectonic units and the role of fracture characteristics, combined with geophysical field characteristics of the study area and geological characteristics of the study is divided into the Weihe River basin, Weibei uplift, Longxian - Qianyang tectonic belt, tectonic Xiaoqinling with four structural units. The study area and tectonic units of the first three structural characteristics of the study in detail, the Weihe River basin is characterized by the main structure in order to "y"-shaped normal fault-controlled deep South like the North Shaoji shallow faulted. Weibei uplift in accordance with faults and associated deformation of the fold difference could be divided into Linyou- Yongshou fold thrust belt and Binxian -Tongchuan structure with two sub-tectonic units.Linyou- Yongshou fold thrust belt development in the folding, faulting and more nearly east-west thrust fault is characterized by the development; Binxian - Tongchuan tectonic zone east of the ground, the ground floor of fault development, the complexity of faults, the North East, North West, east-west faults have developed, with the western fault of the structure a smaller scale, and nearly east-west thrust fault is characterized by the development. Longxian - Qianyang tectonic belt are mainly north of the West towards the thrust fault and the fault block is characterized by folder.4. the study area is mainly a fault of Qinling fault and the northern margin of Badu - Guo Zhen thrust fault, namely the North China platform and Qinling orogenic belt and the border Liupanshan fault. Bi-2 fracture is a grass - old Yongsan - saints bridge was broken and on the north side of Hua Shan fault, the northern margin of the Weihe fault basin, the northern margin uplift Weibei fracture, the fracture of various structural units of the region and sedimentation from development the role of the control. The study area at the three levels of fracture fracture development, as local uplift and depression of the boundary fault and internal fault, the development of the local structure plays an important role in the control.
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