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| A further discussion on the boundary of North China Platform's north margin based on time-domain airborne electromagnetic data |
| SUN Dong-Hua1,2, LI Huai-Yuan1,2, JIANG Min-Zhong1,2, WANG Pei-Jian1,2 |
1. Airborne Survey and Remote Sensing Center of Nuclear Industry, Shijiazhuang 050002, China;
2. Key Laboratory of Uranium Resources Geophysical Exploration Technology, China Nuclear Industry Group Company, Shijiazhuang 050002, China |
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Abstract The north margin of North China Platform, which possesses very rich mineral resources, is one of the important mineral producing areas in China. However, its boundary with the geosyncline folded system in central Inner Mongolia has not been confirmed,and researchers have debated this problem for a long time. To get a specific definition, the authors made a detailed research on Dachaoyangou area which is located in the south of Wengniute County on the north margin of North China Platform. A large scale geological survey was completed using the VTEM system, and high precision time-domain airborne electromagnetic data were obtained. With these data, the authors analyzed the electromagnetic response, time constant characteristics and the variation regularity of apparent electrical resistivity. The boundary extends along the line from east to west, exhibiting a northward protruding arc in the plane. Its interface overall leans outward with the angle 50 ° to 70 °, and it first leans inward and then outward, showing S-shaped twisting down. Objectively, the conclusions of this paper are conducive not only to the study of regional tectonics but also to the mineral resources exploration within the area.
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Received: 25 April 2016
Published: 20 June 2017
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