U-Pb and Re-Os Geochronology of the Tongcun Molybdenum Deposit and Zhilingtou Gold-Silver Deposit in Zhejiang Province,Southeast China,and Its Geological Implications
作者单位：Key Laboratory of Mineral ResourcesInstitute of Geology and GeophysicsChinese Academy of Sciences Key Laboratory of Isotope Geochronology and GeochemistryChinese Academy of Sciences Re-Os Laboratory of National Research Center of GeoanalysisChinese Academy of Geological Sciences
会议名称：《中国科学院地质与地球物理研究所2013年度（第13届）学术年会》
会议日期：2014年
学科分类：070902[理学-地球化学] 0709[理学-地质学] 07[理学]
关 键 词：Mesozoic Re-Os dating U-Pb dating Zhejiang Province
摘 要：Mesozoic ore deposits in Zhejiang Province,Southeast China,are divided into the northwestern and southeastern Zhejiang metallogenic belts along the Jiangshan-Shaoxing *** metal ore depos- its found in these belts are epithermal Au-Ag deposits,hydrothermal-vein Ag-Pb-Zn deposits, porphyry-skarn Mo(Fe)deposits,and vein-type Mo *** is a close spatial-temporal relationship between the Mesozoic ore deposits and Mesozoic volcanic intrusive *** U-Pb dating of the ore-related intrusive rocks and molybdenite Re-Os dating from two typical deposits(Tongcun Mo deposit and Zhilingtou Au-Ag deposit)in the two metallogenic belts show the early and late Yanshanian ages for *** U-Pb data of zircons from the Tongcun Mo deposit and Zhilingtou Au-Ag deposit indicate that the host granitoids crystallized at 169.7±9.7 Ma(2σ)and 113.6±1 Ma(2σ),***-Os analysis of six molybdenite samples from the Tongcun Mo deposit yields an isochron age of 163.9±1.9 Ma(2σ).Re-Os analyses of five molybdenite samples from the porphyry Mo orebodies of the Zhilingtou Au-Ag deposit yield an isochron age of 110.1±1.8 Ma(2σ).Our results suggest that the metal mineralization in the Zhejiang Province,southeast China formed during at least two stages,i.e.,Middle Jurassic and Early Cretaceous,coeval with the granitic magmatism.