Early Silurian Wuchuan–Sihui–Shaoguan exhalative sedimentary pyrite belt, South China: constraints from zircon dating for K-bentonite of the giant Dajiangping deposit

作     者：Yingying Zhang Taiyi Luo Tian Gan Mingzhong Zhou Xinqiao Han Yingying Zhang;Taiyi Luo;Tian Gan;Mingzhong Zhou;Xinqiao Han

作者机构：The State Key Laboratory of Ore Deposit GeochemistryInstitute of GeochemistryChinese Academy of SciencesGuiyang 550081China College of Earth and Planetary SciencesUniversity of Chinese Academy of SciencesBeijing 101407China International Center for Planetary SciencesCollege of GeosciencesChengdu University of TechnologyChengdu 610059China School of Geographical and Environmental SciencesGuizhou Normal UniversityGuiyang 550001China 'Guangdong Guangye Yunliu Pyrite Mining Co.LTDYunfu 527300China 

出 版 物：《Acta Geochimica》 (地球化学学报（英文）)

年 卷 期：2021年第40卷第1期

页      面：1-12页

核心收录：

学科分类：0709[理学-地质学] 070901[理学-矿物学、岩石学、矿床学] 07[理学] 

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.41873058 and 41462001) the Natural Science and Technology Foundation of Guizhou Province,China(Grant No.JZ2009) 

主　　题：Wuchuan–Sihui–Shaoguan exhalative sedimentary pyrite belt Dajiangping pyrite deposit Lowgrade metamorphic K-bentonite Zircon U–Pb dating 

摘      要：The Wuchuan-Sihui-Shaoguan(WSS)exhalative sedimentary pyrite belt in the southwestern part of the Qinzhou-Hangzhou(Qin-Hang)belt is the most important sulfur industry base in ***,a wide range of metallogenetic ages spanning from Ediacaran to Devonian has been reported in the *** age range does not support the idea that the typical character ofcoeval mineralizationin an exhalative sedimentary mineralization belt in China and ***,the precise determination of mineralization ages of representative deposits is necessary to provide guides for exploration and metallogenetic *** Dajiangping pyrite deposit is a typical example of this kind of deposits and is also the largest deposit with a proven reserve of 210 *** deposit was thought to have formed in Ediacaran or *** this study,2-3 layers of 10-25 cm thick 2M1-type microcrystalline muscovite slate abruptly embedded in the No.Ⅳmassive orebody of the deposit has been identified to be low-grade metamorphic K-bentonite.A Concordia zircon LA-ICP-MS U-Pb age of 432.5±1.3 Ma(mean standard weighted deviation of concordance and equivalence=1.2;N=11)has been yielded for the low-grade metamorphic *** age is distinctly different from the Rb-Sr isochron age of630.1±7.3 Ma for siliceous rock at the top of the No.Ⅲbanded orebody and the Re-Os isochron age of 389±62 Ma for pyrites from a laminated ***,it is close to the intercept age(429 Ma)of the youngest detrital zircons from sandstone interlayers of the No.Ⅲbanded *** Concordia age is also coincident with those of the Late Caledonian(400-460 Ma)magmatism-metamorphism events which are widely distributed in Cathaysia ***,it agrees well with that of the Early Silurian extensional volcanism(434-444 Ma)which have been revealed in the Dabaoshan,Siqian-Hekou,and Nanjing volcanic basins in northern Guangdong Province and southern Jiangxi ***,the dating result in this study conf