Journal of Jilin University(Earth Science Edition) ›› 2020, Vol. 50 ›› Issue (4): 1211-1218.doi: 10.13278/j.cnki.jjuese.20190102

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Application of Low Temperature TEM to Geological Exploration in Siziwangqi, Inner Mongolia

Bao Suxin1,2,3, Dong Bingyuan1,2,3, Pei Yifeng1,2, Rong Liangliang1,2, Qiu Longqing1,2, Du Shangyu4   

  1. 1. State Key Laboratory of Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China;
    2. Center of Excellence in Superconducting Electronics, Chinses Academy of Sciences, Shanghai 200050, China;
    3. University of Chinese Academy of Sciences, Beijing 100049, China;
    4. College of Instrumentation & Electrical Engineering, Jilin University, Changchun 130026, China
  • Received:2019-04-30 Online:2020-07-26 Published:2020-07-29
  • Supported by:
    Supported by National Natural Science Foundation of China (61873256)

Abstract: Transient electromagnetic method (TEM) is widely used in metal mine exploration. Based on the new receiving technology of SQUID (superconducting quantum interference device), the TEM has the advantages of low intrinsic noise (5~7 fT/√Hz) and large bandwidth (>200 kHz). As an important mineral reserve, Siziwangqi in Inner Mongolia is rich in mineral resources. The reliability of SQUID instead of induction coil was verified by comparing the experimental results of the anomalous rings obtained by superconducting receiving system and EM67 TEM instrument. The superconducting TEM method was applied to the northern area of Dajingpo, Siziwangqi, Inner Mongolia. The underground anomalous response information in shallow and deep layers (>2 000 m) was obtained to deduce a continuous low resistivity layer. Combined with the existing geological and geophysical data, the inversion results effectively reveal a north-east trending fault zone at 500 m in the shallow layer near the survey line, and then infer that there is a similar trending fault zone at 2 000 m in the deep layer.

Key words: transient electromagnetic method, superconducting quantum interference device, Siziwangqi, fault zone

CLC Number: 

  • P631
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