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冈底斯斑岩铜矿带冲江及驱龙含矿斑岩体锆石ELA-ICP-MS及SHRIMP定年对比研究

, PP. 504-509

Keywords: 冈底斯斑岩铜矿带,含矿斑岩,ELA-ICP-MS,锆石年龄,西藏

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Abstract:

利用ELA?ICP?MS分析技术对冈底斯斑岩铜矿带冲江及驱龙含矿斑岩体进行锆石U?Pb年龄测定,所得到的年龄分别为14.0±0.2Ma和17.0±0.2Ma。两个含矿岩体锆石ELA?ICP?MSU?Pb年龄和SHRIMP年龄在误差范围内基本一致。冲江含矿斑岩体成岩成矿可分为两期,每期成岩成矿时间跨度约1Ma;驱龙含矿斑岩体成岩成矿时间跨度约为1Ma。

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