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Mineralizing age of the Rushan lode gold deposit in the Jiaodong Peninsula:SHRIMP U-Pb dating on hydrothermal zircon
作者姓名:HU Fangfang  FAN Hongrui  YANG Jinhui  WAN Yusheng  LIU Dunyi  ZHAI Mingguo & JIN Chengwei .Key Laboratory of Mineral Resources  Institute of Geology and Geo- physics  Chinese Academy of Sciences  Beijing  China  .Beijing SHRIMP Centre  Institute of Geology  Chinese Academy of Geological Sciences  Beijing  China Correspondence should be addressed to Fan Hongrui
摘    要:Knowledge of the mineralizing timing is fundamen-tal to understand the genesis of mineral deposits, and ex-act time spectrum of mineralization is essential to com-prehending the relationship among the genesis of en-dogenic hydrothermal deposits, regional tectonic-magma-tism event and the geodynamics of mineral deposits. The Jiaodong or eastern Shandong gold province islocated in the southeastern margin of the North Chinacraton, and belongs to the Mesozoic circum-Pacific oro-genic gold system…

关 键 词:热液锆石  SHRIMP  U-Pb定年  地质年代学  含金石英岩脉  胶东半岛  金矿沉积  矿化年代
收稿时间:2004-03-09
修稿时间:2004-04-19

Mineralizing age of the Rushan lode gold deposit in the Jiaodong Peninsula: SHRIMP U-Pb dating on hydrothermal zircon
HU Fangfang,FAN Hongrui,YANG Jinhui,WAN Yusheng,LIU Dunyi,ZHAI Mingguo & JIN Chengwei .Key Laboratory of Mineral Resources,Institute of Geology and Geo- physics,Chinese Academy of Sciences,Beijing ,China,.Beijing SHRIMP Centre,Institute of Geology,Chinese Academy of Geological Sciences,Beijing ,China Correspondence should be addressed to Fan Hongrui.Mineralizing age of the Rushan lode gold deposit in the Jiaodong Peninsula: SHRIMP U-Pb dating on hydrothermal zircon[J].Chinese Science Bulletin,2004,49(15):1629-1636.
Authors:Hu  Fangfang  Fan  Hongrui  Yang  Jinhui  Wan  Yusheng  Liu  Dunyi  Zhai  Mingguo  Jin  Chengwei
Institution:e-mail: fanhr@mail.igcas.ac.cn
Abstract:Zircons from the auriferous quartz vein in the Rushan gold deposit, Jiaodong Peninsula, have high common Pb contents (206Pb6 = 2.00%–15.88%) and Th/U ratios (0.31–1.35), and trap primary CO2-H2O fluid inclusion similar to ore-forming fluids, indicating that they grew from high Th/U ratio ore-forming fluids responsible for gold mineralization. SHRIMP U-Pb analyses of these zircons gave an age of 117±3 Ma comparable with the ages reported by the former researches in the other areas in the Jiaodong Peninsula, which is interpreted as the age of gold mineralization at Rushan. The age of SHRIMP zircon U-Pb dating with 160±3 Ma from host rock Kunyushan monzogranite is different from that of the gold mineralization, indicating that there is no genetic relationship between gold mineralization and the granitic magmatism. SHRIMP U-Pb dating on hydrothermal zircons from auriferous quartz veins could be used to constrain the timing of lode gold mineralization and the relationship to relevant hydrothermal event.
Keywords:hydrothermal zircon  SHRIMP U-Pb dating  geochro- nology  auriferous quartz vein  Rushan gold deposit  Jiaodong Pen- insula  
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