Zircon U–Pb dating of Pubei granite and strontium isotope from sphalerite of the Xinhua Pb–Zn–(Ag) deposit,Yunkai Area of Guangxi Province,South China

作     者：Minfang Wang Xubo Zhang Daohui Pi Xiaonan Guo 

作者机构：Faculty of Earth Resources China University of GeosciencesWuhan 430074 China State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Wuhan 430074China The Second Geological Survey of Henan ProvinceXuchang 461000China 

出 版 物：《Acta Geochimica》 (地球化学学报（英文）)

年 卷 期：2016年第35卷第2期

页      面：156-171页

核心收录：

学科分类：070902[理学-地球化学] 081803[工学-地质工程] 0709[理学-地质学] 07[理学] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：supported by grants by the National Natural Science Foundation of China (No.41272097) the China Geological Survey Project (No.12120114016601) the Special Fund for Basic Scientific Research of Central Colleges, China University of Geosciences (Wuhan) (No.CUG120702) the Teaching Laboratory Foundation of China University of Geosciences (Wuhan) (No.SKJ2013085,SKJ2014010) 

主　　题：Zircon U-Pb Strontium isotope XinhuaPb-Zn-(Ag) deposit Yunkai Area - South China 

摘      要：The Yunkai Area is located at the southern South China Block and is part of the Qinzhou Bay-Hangzhou Bay Metallogenic Belt, which is a famous polymetallic mineralization belt. The Xinhua Pb–Zn–(Ag)deposit is located in the western part of Yunkai Area, with an abundance of Pubei batholiths. Zircon U–Pb geochronology of Pubei batholiths shows that crystallization age ranges from 251.9 ± 2.2 to 244.3 ± 1.8 Ma, thus belonging to Indosinian orogeny. Geochemistry and Sr isotopic compositions of the Pubei batholiths show that it is derived from the partial melting of large scale crustal melting during the stage of exhumation and uplifting of the lower-middle crust. In addition, strontium isotope of sphalerite from the Xinhua Pb–Zn–(Ag) deposit, has limited ranges in ^(87)Rb/^(86)Sr and ^(87)Sr/^(86)Sr, ranging from 0.4077 to 1.0449, and 0.718720 to 0.725245, respectively. The initial ^(87)Sr/^(86)Sr ratios of sphalerite ranges between 0.718720 and 0.725245, which is higher than that of upper continental crust and lower than that of the Pubei batholiths, illustrating the fluid might be derived from the mixing of Pubei pluton and upper continental crust.