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

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

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The Getang is a representative Carlin-type gold deposit in Southwest China.It has a proven reserve of about 30 tonnes at an average grade of 5.1 g/t Au.The 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 Permian.In 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 structures.Three phases of deformation were identi-fied in the deposit:(1)paleokarst was generated by a crustal uplift when the Youjiang Basin experi-enced 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 Chi-na collision(Indosinian orogeny)in Triassic;(3)the NE-trending structures were generated or reacti-vated under a NW-SE-oriented compression during the Yanshanian intracontinental orogeny.The un-conformity recorded two episodes of tectonic evolution in the NNE-SSW and NW-SE directions.Struc-tural 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.

Carlin-type gold depositstructural featuresfinite strainGetangSouthwest Chinaeconomy geologygeochemistry

Guoping Zeng、Xinlu Hu、Diwei Luo、Jianzhong Liu、Shuzhen Yao、Yongjie Jin

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Wuhan Center,China Geological Survey,Wuhan 430205,China

Central South China Innovation Center for Geosciences,Wuhan 430205,China

Faculty of Earth Resources,China University of Geosciences,Wuhan 430074,China

Geological Party 105,Guizhou Bureau of Geology and Mineral Exploration&Development,Guiyang 550018,China

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国家自然科学基金国家自然科学基金湖北省自然科学基金联合项目China Geological SurveyChina Geological SurveyGeological Party 105,Guizhou Bureau of Geology and Mineral Exploration&Development

42072091419722062023AFD21012120115036201DD20190443

2024

10.1007/s12583-021-1461-8

地球科学学刊(英文版)
中国地质大学

地球科学学刊(英文版)

CSTPCD
影响因子：0.724
ISSN：1674-487X
年,卷(期)：2024.35(2)
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