Resistivity of moraine deposits in the Tangbu section, Dongcuoqu, southeastern Xizang

JIANG Shou-Jin; CHEN Yong-Ling; LI Huai-Yuan; HU Jun-Feng

doi:10.11720/wtyht.2023.1107

2023 Vol. 47, No. 1

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JIANG Shou-Jin, CHEN Yong-Ling, LI Huai-Yuan, HU Jun-Feng. 2023. Resistivity of moraine deposits in the Tangbu section, Dongcuoqu, southeastern Xizang. Geophysical and Geochemical Exploration, 47(1): 73-80. doi: 10.11720/wtyht.2023.1107

Citation:

JIANG Shou-Jin, CHEN Yong-Ling, LI Huai-Yuan, HU Jun-Feng. 2023. Resistivity of moraine deposits in the Tangbu section, Dongcuoqu, southeastern Xizang. Geophysical and Geochemical Exploration, 47(1): 73-80. doi: 10.11720/wtyht.2023.1107

Resistivity of moraine deposits in the Tangbu section, Dongcuoqu, southeastern Xizang

Research Center of Applied Geology of China Geological Survey, Chengdu 610000, China

Received Date: 17 March 2022

Revised Date: 20 February 2023

Publish Date: 24 February 2023

Abstract

Abstract

Glacial landforms, such as cirques, razorback ridges, horn peaks, and alpine lakes, are commonly developed in the surrounding areas of the Tangbu section of Dongcuoqu in the Nujiang River Basin in southeastern Xizang, indicating that intensive glacial activities once occurred in this area. However, field surveys show that proluvium and alluvial-diluvial deposits are mainly distributed in the Quaternary surface of this section. The comprehensive analysis of the audio-frequency magnetotellurics and high-density measurement results of this area show that the electrical characteristics of the Quaternary in this section are highly consistent with the moraine deposit structure. Combined with the commonly developed glacial landforms in the surrounding area, it can be inferred that the Quaternary stratum in this section is mainly dominated by moraine deposits, which are covered with a layer of proluvium and alluvial-diluvial deposits. From the perspective of the electrical structure characteristics of the geophysical exploration results, the resistivity results of the audio-frequency magnetotellurics can effectively reflect the structural characteristics including the thickness of the moraine deposits, glacial valleys on the bedrock surface, and moraine lenses, and the resistivity results from high-density measurement can well reflect the characteristics of moraine melange, moraine lenses, and the long axis direction of large boulders.
- audio magnetotelluric sounding /
- high-density measurement /
- moraine deposit /
- electrical characteristics

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References

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