The multistage genesis of the giant Dongshengmiao Zn-Pb-Cu deposit in western Inner Mongolia,China:Syngenetic stratabound mineralization and metamorphic remobilization

作     者：Richen Zhong Wenbo Li 

作者机构：Civil and Environmental Engineering SchoolUniversity of Science and Technology Beijing Key Laboratory of Orogenic Belts and Crustal EvolutionSchool of Earth and Space SciencesPeking University 

出 版 物：《Geoscience Frontiers》 (地学前缘（英文版）)

年 卷 期：2016年第7卷第3期

页      面：529-542页

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：financially supported by the National Basic Research Program of the People's Republic of China(Nos.2013CB429801,2006CB403500) the National Natural Science Foundation of China(Nos.40972057,41502069) the Postdoctoral Science Foundation of China(No.2015M570033) 

主　　题：SEDEX Zn-Pb-Cu Metamorphism Remobilization Orogenic-type deposit 

摘      要：The genesis of the giant Dongshengmiao in the northern margin of the North China Block has been debated since its discovery in the 1950 s,because it shows geological and geochemical characteristics with both syngenetic and epigenetic *** has geological settings and sulfur and lead isotopic compositions that are similar with typical SEDEX（sedimentary exhalative） deposit,while the Zn-Pb-Cu mineralization was controlled by shear deformation and metamorphism,showing similarities with orogenic-type *** this contribution,both the syngenetic and epigenetic features of the Dongshengmiao are envisaged,and accounted for in the context of a genetic model with two metallogenic *** pyrite at the Dongshengmiao was mostly recrystallized during metamorphism,but finegrained texture was locally preserved,indicating its syngenetic *** the contrary,all the Zn-Pb-Cu ores observed in this study show characteristics of epigenetic hydrothermal mineralization that controlled by metamorphism and accompanying shear *** sulfur and lead isotopic compositions of sphalerite and galena indicate that they were in situ remobilized from a syngenetic stratabound source,and the oxygen and hydrogen isotopic ratios of ore-fluid indicate that the large-scale remobilization was assisted by metamorphic *** thermodynamic modeling indicates that the orefluid during remobilization has a great potential of transporting *** may account for the abnormally enriched Cu in the remobilized SEDEX *** metamorphic fluid might strip Cu from the fluid source during devolatilization,and overprint it on the Zn-Pb orebodies during remobilization.A secondary flowthrough modeling reveals that Zn- and Cu-sulfides would be preferentially redistributed in Fe-rich carbonates during remobilization,as a result of fluid-rock ***,a multistage genetic model is *** the development of the Proterozoic rift,stratabound Zn-Pb mineralization to