Crustal Electrical Structure and Deep Metallogenic Potential in Northern Wuyi Area(South China),based on Magnetotelluric Data  

作　　者：LUO Fan Lü Qingtian ZHANG Kun YAN Jiayong Colin GFARQUHARSON ZHANG Chong FU Guangming 

机构地区：[1]School of Geophysics and Measurement-control Technology',East China University of Technology,Nanchang 330013,China [2]Chinese Academy of Geological Sciences,Beijing 100037,China [3]China Deep Exploration Center,China Geological Survey&Chinese Academy of Geological Sciences,Beijing 100037,China [4]Department of Earth Sciences,Memorial University of Newfoundland,St.John's,NL A1B 3X5,Canada

出　　处：《Acta Geologica Sinica(English Edition)》2022年第3期791-805,共15页地质学报（英文版）

基　　金：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);National Key Research and Development Program of China(Grant No.2016YFC0600201).

摘　　要：The northern Wuyi area,which is located in the northern Wuyi metallogenic belt,has superior mineralization conditions.The Pingxiang-Guangfeng-Jiangshan-Shaoxing fault(PSF)extends across the whole region regardless of whether or how the PSF relates to the near-surface mineralization.We carried out an MT survey in the region and obtained a reliable 2D model of the crustal electrical structure to a depth of 30 km.In the resistivity model,we inferred that a continuous high conductivity belt that ranges from the shallow to deep crust is a part of the PSF.Then,we estimated the fluid content and pressure gradient to identify the deep sources of fluid as well as its pattern of motion pattern.Finally,we proposed a model for the deep metallogenic migration processes that combines geological data,fluid content data,pressure gradient data,and the subsurface resistivity model.The model analysis showed that the Jiangnan orogenic belt and the Cathaysia block formed the PSF during the process of com.The deep fluid migrated upward through the PSF to the shallow crust.Therefore,we believe that the PSF is an ore-forming fluid migration channel and that it laid the material basis for large-scale mineralization in the shallow crust.

关 键 词：MAGNETOTELLURICS crustal electrical structure PSF deep metallogenic background model northern Wuyi area 

分 类 号：P612[天文地球—矿床学]