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河北寿王坟铜矿黄铜矿铷锶同位素年龄测定及其
成矿意义
张瑞斌 刘建明 叶杰 陈福坤
ZHANG RuiBin LIU JianMing YE Jie and CHEN FuKun
1.中国科学院地质与地球物理研究所中国科学院矿产资源研究重点实验室,北京 100029
2.中国科学院研究生院,北京100049
1.Key Laboratory ofMineral Resources,Chinese Academy of Sciences;Institute of Geology and Geophysics,Chinese Academy ofSciences,
Bc ng 100029。China
2.Graduate School of Chi~se Academy of Sciences,Be ng 100049,China
2007-07.30收稿.2008-02.28改回.
Zhang RB。Liu JM ,Ye J and Chen FK.2O08.Chalcopyrite Rb-Sr Bochron age dating and its’ore-forming significance in
Shouwangfen copper deposit。Hebei province.Acta Petrologica Sinica,24(6):1353—1358
Abstract In this paper, the sub—sample ehalcopyrite Rb—Sr isochron age,1 1 1.0Ma,had been successfully measured,which
illustrated the skarn ore-forming age in Shouwangfen copper deposit. Contrasting with chalcopyrite pyrite assemblage age
(113.6Ma)and chalcopyrite+skam age(112.3Ma)and chalcopyrite+pyrite+skam age(115.0Ma)obtained by the same
means,convinced US that directly dating the sub—sample metal minerals’age could be a routine metal deposit chronological method.
Key words Chaleopyrite Rb—Sr isotope Dating;Sub—sample;Ore-form ing age;Shouwangfen copper deposit
摘要 本文以黄铜矿及其共生矿物为定年对象,采用亚样品取样和铷锶等时线定年方法测定了寿王坟铜矿的成矿时代。
分析测试获得黄铜矿+黄铁矿单矿物组合的等时线年龄113.6Ma,黄铜矿+夕卡岩组合的等时线年龄112.3Ma和黄铜矿+
黄铁矿+夕卡岩组合的等时线年龄115.0Ma。对比同一矿石亚样品,认为河北寿王坟夕卡岩型铜矿成矿时代为1l1.0Ma。
实验表明,采用矿石亚样品取样方法和直接测定金属硫化物单矿物铷-锶同位素年龄可以有效地确定矿床成矿时代。
关键词 寿王坟铜矿;黄铜矿;铷锶定年;亚样品;成矿时代 |
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