APPLICATION OF GEOPHYSICAL AND GEOCHEMICAL PROSPECTING TECHNIQUES IN SPECIAL GEOLOGICAL AND GEOMORPHIC AREAS

YU Jin-song; JING Lei; WANG Qiao-lin; HAN Wei; LIU Hua-zhong; GAO Xiao-liang

Volume 22 Issue 4

Dec. 2016

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Article Navigation > Journal of Geomechanics > 2016 > 22(4): 893-906

YU Jin-song, JING Lei, WANG Qiao-lin, et al., 2016. APPLICATION OF GEOPHYSICAL AND GEOCHEMICAL PROSPECTING TECHNIQUES IN SPECIAL GEOLOGICAL AND GEOMORPHIC AREAS. Journal of Geomechanics, 22 (4): 893-906.

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APPLICATION OF GEOPHYSICAL AND GEOCHEMICAL PROSPECTING TECHNIQUES IN SPECIAL GEOLOGICAL AND GEOMORPHIC AREAS

Institute of Geophysical and Geochemical Exploration, CAGS, Langfang 065000, Hebei, China

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Received: 2016-09-16
Published: 2016-12-01

Abstract

Abstract

Based on the application experiment of geophysical and geochemical prospecting technique in special geological and geomorphic areas mapping, this paper introduces the methods of extracting geologic information from regional geophysical and geochemical data. It is pointed out that the combination of gravity and Rn-Hg survey is efficient and low-cost for detecting concealed rock and fault in coverage areas. The weathering grades of intensely weathered areas can be clarified into bedrock, weak weathering, moderate weathering, strong weathering, total weathering, residual soil, and so on. Besides that, the geochemical behavior of weathered crust has a trace effect on the decomposition of primary minerals and the formation of secondary minerals. Due to the significant differentiation of REE in different weathered layers, the distribution pattern of REE which are strongly enriched in the whole weathering layer (rock-soil interface or weathering rock top) can be used as an important geochemical identification index for delimiting weathering crust.
- geological mapping,
- geophysical and geochemical exploration technique,
- element geochemistry,
- discrimination,
- application

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