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| THE ROLE OF CSAMT IN THE EXPLORATION OF THE YUSHAN LARGE-SIZE BAUXITE DEPOSIT IN HENAN PROVINCE |
| MA Zhen-bo1,2, YAN Chang-hai1,2, LI Zhong-ming2, SI Fa-zhen2, LIU Bai-shun2, YANG Rui-xi2 |
1. School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China;
2. Henan Institute of Geological Survey, Zhengzhou 400051, China |
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Abstract Combining the application of this method in the exploration of the Yushan large-size concealed bauxite deposit in Henan Province and the exploration characteristics of the covered mining area,this paper discusses the advantage of CSAMT for the pre-survey and survey of concealed bauxite deposits. The exploration depth of the Yushan concealed bauxite deposit in Henan Province is generally 150~700 m, which is so deep that the conventional D.C. electric sounding method cannot meet the needs. The Controlled Source Audio-frequency Magnetotellurics (CSAMT) is a new geophysical technique, and has such advantages as stronger signal, deeper exploration depth and higher resolution. Based on the inversion result of WINGLINK2D and WINGLINK1D, it can accurately reflect the characteristics of deep ore-bearing rock series, formations and structures, and optimize the layout of the project.
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Received: 10 March 2012
Published: 10 August 2012
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