Structural Control of the Getang Carlin-Type Gold Deposit in Southwest China

作     者：Guoping Zeng Xinlu Hu Diwei Luo Jianzhong Liu Shuzhen Yao Yongjie Jin Guoping Zeng;Xinlu Hu;Diwei Luo;Jianzhong Liu;Shuzhen Yao;Yongjie Jin

作者机构：Wuhan CenterChina Geological SurveyWuhan430205China Central South China Innovation Center for GeosciencesWuhan430205China Faculty of Earth ResourcesChina University of GeosciencesWuhan430074China Geological Party 105Guizhou Bureau of Geology and Mineral Exploration&DevelopmentGuiyang550018China 

出 版 物：《Journal of Earth Science》 (地球科学学刊（英文版）)

年 卷 期：2024年第35卷第2期

页      面：536-552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：supported by the National Natural Science Foundation of China(Nos.42072091,41972206) the Hubei Provincial Natural Science Foundation Joint Project(No.2023AFD210) the China Geological Survey(Nos.12120115036201,DD20190443) 

主　　题：Carlin-type gold deposit structural features finite strain Getang Southwest China economy geology geochemistry 

摘      要：The Getang is a representative Carlin-type gold deposit in Southwest *** has a proven reserve of about 30 tonnes at an average grade of 5.1 g/t *** orebodies occur as strat-abound lenses,and are structurally controlled by shallow NWW-and NE-trending fold-fault systems and the unconformity between the Upper and Middle *** this study,the regional-and deposit-scale structural investigations,joints and finite strain measurements,and stress and dynamic analysis were conducted with an aim to reveal the structural process of the Getang gold deposit and clarify the relationship between the gold mineralization and *** phases of deformation were identified in the deposit:(1)paleokarst was generated by a crustal uplift when the Youjiang Basin experienced extension at the end of the Middle Permian,laying the foundation for the unconformity;(2)the NW-trending structures were formed under a NNE-SSW compression during the Indochina-South China collision(Indosinian orogeny)in Triassic;(3)the NE-trending structures were generated or reactivated under a NW-SE-oriented compression during the Yanshanian intracontinental *** unconformity recorded two episodes of tectonic evolution in the NNE-SSW and NW-SE *** analyses and geochronology data suggest that the Getang gold deposit was formed as a result of tectonic transition from compression to extension during the Yanshanian intracontinental orogeny.