小秦岭变质岩及脉体锆石SHRIMP U-Pb年龄及其地质意义

李厚民 陈毓川 王登红 叶会寿 王彦斌 张长青 代军治. 小秦岭变质岩及脉体锆石SHRIMP U-Pb年龄及其地质意义[J]. 岩石学报, 2007, 23(10): 2504-2512.
引用本文: 李厚民 陈毓川 王登红 叶会寿 王彦斌 张长青 代军治. 小秦岭变质岩及脉体锆石SHRIMP U-Pb年龄及其地质意义[J]. 岩石学报, 2007, 23(10): 2504-2512.
SHRIMP U-Pb zircon ages of metamorphic rocks and veins in the Xiaoqinling area, Henan, and their geological significance[J]. Acta Petrologica Sinica, 2007, 23(10): 2504-2512.
Citation: SHRIMP U-Pb zircon ages of metamorphic rocks and veins in the Xiaoqinling area, Henan, and their geological significance[J]. Acta Petrologica Sinica, 2007, 23(10): 2504-2512.

小秦岭变质岩及脉体锆石SHRIMP U-Pb年龄及其地质意义

  • 基金项目:

    中国地质调查局《我国西部重要成矿区带矿产资源潜力评估》(1212010535804)、《中国成矿体系综合研究》(1212010634002)、《我国重要矿产和区域成矿规律研究》(1212010633903)等项目的资助.

SHRIMP U-Pb zircon ages of metamorphic rocks and veins in the Xiaoqinling area, Henan, and their geological significance

  • 本文对小秦岭地区花岗伟晶岩、花岗片麻岩及含金石英脉中的锆石进行了SHRIMP U-Pb年龄测定.花岗伟晶岩中的锆石为岩浆锆石,其207Pb/206Pb平均年龄为1955±30Ma,MSWD=1.4;花岗片麻岩中的锆石复杂,其变质成因"幔"的207Pb/206Ph平均年龄为2462±20Ma,MSWD=2.0,铅丢失不谐和直线的上交点年龄为2400~2600Ma;含金石英脉中的锆石为残余锆石,其207Ph/206Pb平均年龄为1995±86Ma,MSWD=0.092.这些年龄数据为小秦岭地区的构造演化提供了更精确的年龄依据,2400~2600Ma和1900~2000Ma分别代表了小秦岭地区第一期和第二期变质作用的年龄.含金石英脉形成于2000Ma之后,石英脉中没有热液锆石.
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出版历程
修回日期:  2007-07-06
刊出日期:  2007-10-31

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