Metallogenetic epoch and mechanism of the tungsten ore in Yushan, Beishan orogenic belt, Gansu  

作　　者：ZHANG XinHu SU Li CUI XueJun DING ShuHong ZHANG JianGuo CHEN Li 

机构地区：[1]School of Resources and Environment, Lanzhou University, Lanzhou 730000, China [2]The Geological Lab Center and State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China [3]Gansu Bureau of Geology and Mineral Exploration and Development, Lanzhou 730000, China [4]No.4 Geological Exploration Institute, Gansu Bureau of Geology and Mineral Exploration and Development, Jiuquan 735000, China [5]Gansu Institute of Geological Survey, Lanzhou 730000, China [6]Laboratory of Electron Microscopy, School of Physics, Peking University, Beijing 100871, China

出　　处：《Chinese Science Bulletin》2008年第8期1222-1230,共9页

基　　金：the National Natural Science Foundation of China (Grant No. 40572045);the State Key Laboratory of Geological Processes and Mineral Re-sources in China University of Geosciences (GPMR0543);the research project ‘The study of metallization of ore deposits in Gansu Province’ in Gansu Geology and Mineral Resources Bureau

摘　　要：Using SHRIMP zircon U-Pb dating methods and cathodoluminescence (CL) technique, we have pre- cisely dated ore samples from tungsten ore deposit, ore-bearing volcanic-sedimentary strata and granite in the Yushan region within the east Tianshan-Beishan W-bearing zone. This study reveals Yu- shan tungsten ore deposit zone formed in 250 ± 9 Ma, and it is closely associated with the Permian granites and felsic volcanic rocks. This new type of tungsten ore deposit in the east Tianshan-Beishang multiple-metallogenetic province may probably be associated with the regionally right-literal shearing after the main Carboniferous collisional orogeny, and the formation of pull-apart basin and the felsic magmatism.Using SHRIMP zircon U-Pb dating methods and cathodoluminescence （CL） technique, we have precisely dated ore samples from tungsten ore deposit, ore-bearing volcanic-sedimentary strata and granite in the Yushan region within the east Tianshan-Beishan W-bearing zone. This study reveals Yushan tungsten ore deposit zone formed in 250 ± 9 Ma, and it is closely associated with the Permian granites and felsic volcanic rocks. This new type of tungsten ore deposit in the east Tianshan-Beishang multiple-metallogenetic province may probably be associated with the regionally right-literal shearing after the main Carboniferous collisional orogeny, and the formation of pull-apart basin and the felsic magmatism.

关 键 词：甘肃 钨矿石 锆石 二叠纪 

分 类 号：P57[天文地球—矿物学]