Multiple-Stage Mineralization in the Huayangchuan U-REE-Mo-Cu-Fe Ore Belt of the Qinling Orogen,Central China:Geological and Re-Os Geochronological Constraints  

作　　者：Hongjun Jiang Chunsi Yang Dequan Wang Hui Zheng Jie Li Huayong Chen 

机构地区：[1]Key Laboratory of Mineralogy and Metallogeny,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China [2]CAS Center for Excellence in Deep Earth Science,Guangzhou 510640,China [3]University of Chinese Academy of Sciences,Beijing 100049,China [4]Guangdong Provincial Key Laboratory of Mineral Physics and Materials,Guangzhou 510640,China [5]State Key Laboratory of Isotope Geochemistry,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China [6]Geological Party No.214,Sino Shaanxi Nuclear Industry Group,Xi'an 710100,China [7]Sino Shaanxi Nuclear Industry Group,Xi'an 710100,China

出　　处：《Journal of Earth Science》2022年第1期193-204,共12页地球科学学刊（英文版）

基　　金：financially supported by the Academician Workstation of Sino Shaanxi Nuclear Industry Group(Nos.ZSH-YS190101 and ZSH-YS180101);Major Project of Basic and Applied Basic Research in Guangdong Province(No.2019B030302013)。

摘　　要：The Huayangchuan ore belt is located in the western segment of Xiaoqinling Orogen in the southern margin of the North China Craton(NCC),and hosts voluminous magmatism and significant U-REE-Mo-Cu-Fe polymetallic mineralization.However,geochronological framework of the various mineralization phases in this region is poorly understood.Here,we present new Re-Os isochron ages on magnetite from the Caotan Fe deposit(2 675 ± 410 Ma,MSWD = 0.55),and on pyrite from the Jialu REE deposit(2 127 ± 280 Ma,MSWD = 1.9) and Yuejiawa Cu deposit(418 ± 23 Ma,MSWD =11.5),and Re-Os weighted average model age on pyrite from the Taoyuan Mo-U deposit(235 ± 14 Ma,MSWD = 0.17).These ages,combined with regional geology and mineralization ages from other deposits,suggest that mineralization in the Huayangchuan ore belt lasted from the Neoarchean to the Late Mesozoic.The mineralization corresponds to regional tectono-magmatic events,including the Neoarchean alkali magmatism(REE mineralization),Paleoproterozoic plagioclase-amphibolite emplacement(Fe mineralization),Paleoproterozoic pegmatite magmatism(U mineralization),Paleozoic Shangdan oceanic slab subduction-related arc magmatism(Cu mineralization),Early Mesozoic Paleo-Tethys Ocean subduction-related arc magmatism(Mo-U mineralization),and Late Mesozoic Paleo-Pacific oceanic plate subduction direction change-related Mo(-Pb) mineralization.We proposed that the Huayangchuan ore belt has undergone prolonged metallogenic evolution,and the magmatism and associated mineralization were controlled by regional geodynamic events.

关 键 词：Re-Os dating U-REE-Mo-Cu-Fe mineralization Huayangchuan ore belt extra-long metallogenic history Qinling Orogen geochemistry 

分 类 号：P618.2[天文地球—矿床学]