Home > Archive>Volume 96, Issue 3, 2022 >791-805. DOI:10.1111/1755-6724.14864
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Crustal Electrical Structure and Deep Metallogenic Potential in Northern Wuyi Area (South China), based on Magnetotelluric Data
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We are grateful to Dr. Yu Hui for the detailed discussion. This research was jointly supported by the National Natural Science Foundation of China (Grant Nos. 92062108, 41574133, 41630320, 41864004), Geological Survey Project of China (Grant Nos. DD20190012, DD20160082, DD20221643), Innovation Fund Designated for Graduate Students of Jiangxi Province (Grant No. YC2019-B108) and National Key Research and Development Program of China (Grant No. 2016YFC0600201).

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    Abstract:

    The northern Wuyi metallogenic belt contains many polymetallic deposits associated with the Pingxiang–Guangfeng–Jiangshan–Shaoxing Fault (PSF). To study how the PSF has controlled the near-surface mineralization during tectono-magmatic events, a magnetotelluric survey was conducted in the region and a reliable 2D crustal resistivity model was developed. From this model, we inferred that the PSF is characterized by a continuous low-resistivity belt that extends from the surface to the lower crust in the study area and connects to a large conductor in the lower crust. Moreover, the crustal fluid fraction and pressure gradient estimated by our resistivity model exhibited a conspicuous anomaly at the PSF; thus, a material migration model was proposed to explain the source and migration channels of fluids during mineralization. We attributed the Mesozoic minerogenesis to the PSF rework and found that deep fluids were formed in the lower crust and migrated upward through the PSF to the uppermost crust, thereby controlling the large-scale metallogenic belt in the northern Wuyi area. Moreover, we proposed that the formation of mineral system can be divided into three stages, including initially structural formation, structural rework and the migration of ore-bearing fluids.

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LUO Fan, LU Qingtian, ZHANG Kun, YAN Jiayong, Colin G. FARQUHARSON, ZHANG Chong, FU Guangming.2022. Crustal Electrical Structure and Deep Metallogenic Potential in Northern Wuyi Area (South China), based on Magnetotelluric Data[J]. Acta Geologica Sinica(),96(3):791-805

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History
  • Received:March 16,2021
  • Revised:October 11,2021
  • Online: July 03,2022
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