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| Magnetotelluric sounding of deep geological framework of gold deposits in loess-covered areas: a case study of the Yanjiagou gold deposit in Huailai County, Hebei Province |
| LI Xiao-Li1, ZHANG Bao-Lin1, GUO Zhi-Hua1,2, ZHAO lian-Feng1, XIAO Qi-Bing3, ZHANG Li-Li1, HAI Lian-Fu1,2, LI Gang1,2 |
1. Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;
2. Graduate University Chinese Academy of Sciences, Beijing 100049, China;
3. Institute of Geology, China Earthquake Administration, Beijing 100029, China |
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Abstract According to the obvious differences of resistivity between major rocks and ore bodies, the magnetotellic method was employed in the Yanjiagou gold deposit of Huailai County, Hebei Province. In this paper, the authors processed and analyzed the data collected in the study area by some precision instruments, and constructed the resistivity gradient profile model. On such a basis, some low-resistivity zones were detected, which accorded well with the result of drilling exploration and high precision magnetic survey. Some anomalous belts of low resistivity were found in the surveyed area, which are distributed at the depth of or near western site 11, southern site 54 and eastern site 21 and are considered to be places favorable for minerization. The study results provide useful geophysical information for prognosis of concealed orebodies in covered areas.
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Received: 24 August 2013
Published: 10 December 2014
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