Mineral Deposit Model of Cu-Fe-Au Skarn System in the Edongnan Region, Eastern China  

作　　者：XIE Guiqing MAO Jingwen ZHU Qiaoqiao HAN Yingxiao LI Wei DUAN Chao YE Hui 

机构地区：[1]Institute of Earth Sciences,China University of Geosciences,Beijing 100083,China [2]MLR Key Laboratory of Metallogeny and Mineral Assessment,Institute of Mineral Resources,CAGS,Beijing 100037,China [3]Faculty of Geosciences and Resources,China University of Geosciences,Beijing 100083,China [4]Hubei Sanxin Gold Copper Limited Company,Daye,Hubei 435102,China

出　　处：《Acta Geologica Sinica(English Edition)》2020年第6期1797-1807,共11页地质学报（英文版）

基　　金：supported by the National Science Foundation of China(41925011);the National Key Research and Development Program of China(2016YFC0600206);China University of Geosciences(3-8-2020-002);China Geological Survey(DD20201173);Hubei Sanxin Gold Copper Limited Company(CG-2019-HX-S004)。

摘　　要：Cu and Fe skarns are the world's most abundant and largest skarn type deposits,especially in China,and Au-rich skarn deposits have received much attention in the past two decades and yet there are few papers focused on schematic mineral deposit models of Cu-Fe-Au skarn systems.Three types of Au-rich deposits are recognized in the Edongnan region,Middle-Lower Yangtze River metallogenic belt:~140 Ma Cu-Au and Au-Cu skarn deposits and distal Au-Tl deposits.137-148 Ma Cu-Fe and 130-133 Ma Fe skarn deposits are recognized in the Edongnan region.The Cu-Fe skarn deposits have a greater contribution of mantle components than the Fe skarn deposits,and the hydrothermal fluids responsible for formation of the Fe skarn deposits involved a greater contribution from evaporitic sedimentary rocks compared to Cu-Fe skarn deposits.The carbonate-hosted Au-Tl deposits in the Edongnan region are interpreted as distal products of Cu-Au skarn mineralization.A new schematic mineral deposit model of the Cu-Fe-Au skarn system is proposed to illustrate the relationship between the Cu-Fe-Au skarn mineralization,the evaporitic sedimentary rocks,and distal Au-Tl deposits.This model has important implications for the exploration for carbonate-hosted Au-Tl deposits in the more distal parts of Cu-Au skarn systems,and Fe skarn deposits with the occurrence of gypsum-bearing host sedimentary rocks in the MLYRB,and possibly elsewhere.

关 键 词：mineral deposit model exploration Cu-Fe-Au skarn system Middle-Lower Yangtze River metallogenic belt 

分 类 号：P612[天文地球—矿床学]