A 3D Investigation of Geological Structure and Its Relationship to Mineralization in the Nanling-Xuancheng Ore District,Middle-Lower Yangtze River Metallogenic Belt,China  

作　　者：Sanming Lu Xueyi Lan Lili Zhao Zanzan Zhang Xiaoyong Yang Zhuang Zhao Dong Guo Xiaochun Xu Yongsheng Wang Jianshe Li Huasheng Qi 

机构地区：[1]Public Geological Survey Management Center of Anhui Province,Hefei 230091,China [2]Geological Exploration Technology Institute of Anhui Province,Hefei 230031,China [3]School of Resources and Environmental Engineering,Hefei University of Technology,Hefei 230009,China [4]CAS Center for Excellence in Comparative Planetology,University of Science and Technology of China,Hefei 230026,China

出　　处：《Journal of Earth Science》2022年第3期664-680,共17页地球科学学刊（英文版）

基　　金：supported by the National Key R&D Program Project of China(No.2016YFC0600209)。

摘　　要：The Nanling-Xuancheng ore region of Anhui Province is located in the Middle-Lower Yangtze River metallogenic belt.Insufficient exploration and research have been carried out in this newly defined ore district,although the Chating large porphyry Cu-Au deposit and a few middle-sized skarntype Cu polymetallic deposits have been discovered.In this study,we carried out high-resolution seismic reflection,magnetotelluric,gravity,and magnetic investigations,and constructed the 3 D geological structure of the uppermost crust in a depth range of 0-5 km using a comprehensive inversion of the new data constrained by previous deep-drilling data.We hence proposed some new insights to understand the mineralization processes of this district.A system of alternating ridges and valleys is suggested as the major structure pattern,composed of“two-layer structure”of the basins and“three-layer structure”of anticlines.Moreover,a conjugated fault system and its distribution features are revealed in our models,including the Jiangnan fault,Zhouwang fault,and Kunshan thrust nappe.The Jiangnan and Kunshan faults are suggested to have controlled the diagenesis and metallogenesis.Two deep concealed plutons located in Chating and Magushan are found,forming the Mesozoic diorite-felsic intrusions.These intrusions are believed to be the causes of hydrothermal deposits such as the Chating deposit and the Magushan deposit.

关 键 词：geophysical exploration 3D structure metallogenic mechanism Nanling-Xuancheng ore region Middle-Lower Yangtze River metallogenic belt ore deposits 

分 类 号：P618.2[天文地球—矿床学]