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Sulfide ore prospecting in carbon-containing stratum using comprehensive time-domain induced polarization and controlled-source audio-frequency magnetotellurics

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Abstract

Carbon-bearing stratum normally features low resistance and high polarization. If the lithostratigraphy of the exploration area contains large amounts of carbon, the induced polarization anomaly caused by metal sulfide ore bodies will be inundated by the high polarization of carbon-containing wall rock. In this work, we adopted time-domain induced polarization (TDIP) and controlled-source audio-frequency magnetotellurics (CSAMT) on deep prospecting of the carbon-bearing stratum of the Ar Horqin Banner, Inner Mongolia. The underground medium is divided into target geologic bodies according to the geological information within the known exploration line borehole, and the physical properties of various target geologic bodies are calculated using weighted averages to build a geologic–geophysical model that can fit the observation data. Consequently, we can determine the range and morphological characteristics of the electrical properties of the ore-bearing geologic bodies in the inversion results in the study area. Then we can use the characteristics summarized from the known exploration line to interpret unknown exploration line. Results indicated that, when the difference in physical properties between the ore body and interference wall rock is not clear, the geologic body can be classified via the paragenetic (associated) assemblage relations of the underground medium. Geological interpretation is guided by the comprehensive physical properties of ore-bearing geologic bodies to avoid interferences.

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Acknowledgment

First and foremost, we would like to thank the teachers from the Editorial Office of APPLIED GEOPHYSICS and reviewers for their pertinent suggestions and patient guidance. Also, much gratitude is to be expressed to Yuan Chunhua (Professor Level Senior Engineer), Li Yangchun (Professor Level Senior Engineer), Han Jiuxi (Professor Level Senior Engineer) and Ye Jinhua (Professor) from Development and Research Center of China Geological Survey for their help and support in the preparation process.

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Authors and Affiliations

  1. Development and Research Center, China Geological Survey, Beijing, 100037, China

    Ren-Bin Sun, Qiu-Ming Cheng & Yun-Chuan Xiang

  2. China University of Geosciences, Beijing, 100083, China

    Ren-Bin Sun, Gui-Bin Zhang, Qiu-Ming Cheng, Bin Hu & Chang-Rong Zhang

  3. University of Salzburg, Salzburg, 5020, Austria

    Li-Xia Chu

  4. Inner Mongolia Geology Mineral, Hohhot, 010010, China

    Jian-Fu Li & Yi-Jun Zhao

Authors
  1. Ren-Bin Sun
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  2. Li-Xia Chu
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  3. Gui-Bin Zhang
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  4. Qiu-Ming Cheng
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  5. Yun-Chuan Xiang
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  6. Bin Hu
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  7. Chang-Rong Zhang
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  8. Jian-Fu Li
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  9. Yi-Jun Zhao
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Corresponding author

Correspondence to Gui-Bin Zhang.

Additional information

Fund program: The Research is funded by Comprehensive Intelligent Mapping System and Application of Geological Survey (DD20190415), Exploration and Development Tracking and Result Integration of Energy and Important Mineral Resources (DD20190457), and Resource Assessment and Prediction for Main Tectonic Metallogenetic Domains in the World (DD20190459).

Sun Renbin who graduated with a doctorate from College of Geophysics and Information Technology of China University of Geosciences (Beijing)in 2017. engages in the researches of applied geophysical, resources and environment evaluation, geological survey comprehensive intelligent mapping system and application. The contact address is Room405, Fuwai Street, Xicheng District, Beijing City. The telephone number is 15949477521 and the E-mail address is 87401945@qq.com.

Zhang Guibin who is the professor and the doctoral supervisor of Geophysics and Information Technology of China University of Geosciences (Beijing), mainly engages in the researches of Geophysical inversion, magneto electric exploration and so on. The E-mail address is gbzhang@cugb.edu.cn.

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Sun, RB., Chu, LX., Zhang, GB. et al. Sulfide ore prospecting in carbon-containing stratum using comprehensive time-domain induced polarization and controlled-source audio-frequency magnetotellurics. Appl. Geophys. 17, 809–822 (2020). https://doi.org/10.1007/s11770-018-0715-4

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  • DOI: https://doi.org/10.1007/s11770-018-0715-4

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