Application of the CSAMT Method to Pb–Zn Mineral Deposits: A Case Study in Jianshui, China
by
Zhenwei Guo 1,2,3
, Longyun Hu 1,2,3, Chunming Liu 1,2,3, Chuanghua Cao 4, Jianxin Liu 1,2,3 and Rong Liu 1,2,3,*
Zhenwei Guo 1,2,3, Longyun Hu 1,2,3, Chunming Liu 1,2,3, Chuanghua Cao 4, Jianxin Liu 1,2,3 and Rong Liu 1,2,3,*
1
School of Geosciences and Info-Physics, Central South University, Changsha 410083, China
2
Hunan Key Laboratory of Nonferrous Resources and Geological Hazard Exploration, Changsha 410083, China
3
Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring (Central South University) Ministry of Education, Changsha 410083, China
4
Geology Survey Institute of Hunan Province, Changsha 410116, China
*
Author to whom correspondence should be addressed.
Minerals 2019, 9(12), 726; https://doi.org/10.3390/min9120726
Received: 4 October 2019 / Revised: 20 November 2019 / Accepted: 21 November 2019 / Published: 25 November 2019
(This article belongs to the Special Issue Novel Methods and Applications for Mineral Exploration)
The electromagnetic (EM) method is commonly used in mineral exploration due to the method’s sensitivity to conductive targets. Controlled source audio-frequency magnetotellurics (CSAMT) is developed from magnetotelluric (MT) method with an artificial EM source to improve the signal amplitude. It has been used for mineral exploration for many years. In this study, we performed a case study of the CSAMT application for the Eagles-Nest lead–zinc (Pb–Zn) ore deposits in Jianshui, China. The Eagles-Nest deposit is located in southwest in China in forest-covered complex terrain, making it difficult to acquire the geophysical data. Based on the previous dual-frequency induced polarization (IP) results, we designed four profiles for the CSAMT data acquisition. After data processing and inversion, we mapped the subsurface resistivity distribution. From the CSAMT results, we inferred the location of the ore body, which was verified by the drilling wells. The Pb–Zn ore body was found at a depth between 373.70 m to 407.35 m in the well.
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Keywords:
CSAMT; dual-frequency IP; mineral exploration
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MDPI and ACS Style
Guo, Z.; Hu, L.; Liu, C.; Cao, C.; Liu, J.; Liu, R. Application of the CSAMT Method to Pb–Zn Mineral Deposits: A Case Study in Jianshui, China. Minerals 2019, 9, 726.
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