Late Paleozoic base and precious metal deposits,East Tianshan, Xinjiang, China： Characteristics and geodynamic setting

作     者：JingwenMao RichardJ.Goldfarb YitianWang CraigJ.Hart ZhiliangWang JianminYang 

作者机构：FacultyofGeosciencesandResourcesChinaUniversityofGeosciencesBeijing100083China／／InstituteofMineralResourcesChineseAcademyofGeologicalSciencesBeijing100037China U.S.GeologicalSurveyBox25046MS964DenverFederalCenterDenverCO80225-0046USA InstituteofMineralResourcesChineseAcademyofGeologicalSciencesBeijing100037China YukonGeologyProgramBox2703（K-10）WhitehorseYukonY1A2C6CanadaCorrespondingauthors：JingwenMao 

出 版 物：《Episodes》 (地质幕（英文版）)

年 卷 期：2005年第28卷第1期

页      面：23-36页

核心收录：

学科分类：070903[理学-古生物学与地层学(含：古人类学)] 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] 

主　　题：天山中部地区 古生代 贵金属矿床 地质力学 新疆自治区 

摘      要：The East Tianshan is a remote Gobi area located in eastern Xinjiang, northwestern China. In the past several years, a number of gold, porphyry copper, and Fe(-Cu) and Cu-Ag-Pb-Zn skarn deposits have been discovered there and are attracting exploration *** East Tianshan is located between the Junggar block to the north and early Paleozoic terranes of the Middle Tianshan to the south. It is part of a Hercynian orogen with three distinct E-W-trending tectonic belts: the Devonian-Early Carboniferous Tousuquan-Dananhu island arc on the north and the Carboniferous Aqishan -Yamansu rift basin to the south, which are separated by rocks of the Kanggurtag shear zone. The porphyry deposits, dated at 322 Ma, are related to the late evolutionary stages of a subduction-related oceanic or continental margin arc. In contrast, the skarn, gold, and magmatic Ni-Cu deposits are associated with post-colli-sional tectonics at ca. 290-270 Ma. These Late Carboniferous - Early Permian deposits are associated with large-scale emplacement and eruption of magmas possibly caused by lithosphere delamination and rifting within the East Tianshan.