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新疆卡拉麦里清水东斜长花岗岩的锆石U-Pb年龄及地质意义

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聂晓勇, 刘家军, 苏大勇, 章享云. 新疆卡拉麦里清水东斜长花岗岩的锆石U-Pb年龄及地质意义[J]. 中国地质, 2016, (5): 1729-1736. doi: 10.12029/gc20160521
引用本文: 聂晓勇, 刘家军, 苏大勇, 章享云. 新疆卡拉麦里清水东斜长花岗岩的锆石U-Pb年龄及地质意义[J]. 中国地质, 2016, (5): 1729-1736. doi: 10.12029/gc20160521
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NIE Xiao-yong, LIU Jia-jun, SU Da-yong, ZHANG Xiang-yun. Zircon U-Pb age of the east Qingshui plagiogranite in Kalamaili belt of Xinjiang and its geological implications[J]. Geology in China, 2016, (5): 1729-1736. doi: 10.12029/gc20160521
Citation: NIE Xiao-yong, LIU Jia-jun, SU Da-yong, ZHANG Xiang-yun. Zircon U-Pb age of the east Qingshui plagiogranite in Kalamaili belt of Xinjiang and its geological implications[J]. Geology in China, 2016, (5): 1729-1736. doi: 10.12029/gc20160521
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新疆卡拉麦里清水东斜长花岗岩的锆石U-Pb年龄及地质意义

  • 1.

    中国地质大学地质过程与矿产资源国家重点实验室, 北京 100083;武警黄金第八支队, 新疆 乌鲁木齐 830057

  • 2.

    中国地质大学地质过程与矿产资源国家重点实验室, 北京 100083

Zircon U-Pb age of the east Qingshui plagiogranite in Kalamaili belt of Xinjiang and its geological implications

  • 1.

    State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China;No.8 Gold Branch of CAPF, Urumqi 830057, Xinjiang, China

  • 2.

    State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China

    摘要
  • 新疆卡拉麦里蛇绿混杂岩带中广泛存在斜长花岗岩，对其形成时代及成因还存在较大争议。在研究卡拉麦里地区岩石地球化学特征和测定LA-ICP-MS锆石U-Pb年龄时发现，清水东斜长花岗岩与蛇绿岩中斜长花岗岩、堆晶辉长岩在稀土、微量元素成分特征上存在较大差异，但与其中块状辉长岩具有相似的稀土、微量元素配分模式，并且两者符合部分熔融趋势，清水东斜长花岗岩的成岩年龄为（342.0±3.8）Ma，表明它是处于早石炭世后碰撞背景下的一次构造-热事件的产物，而不可能是蛇绿岩中的浅色岩。
    The age and genesis of plagiogranite in Karamaili ophiolitic melange of Xinjiang are still in controversy. In this study, the geochemical characteristics and LA-ICP-MS zircon U-Pb ages of the plagiogranite were determined. It is found that the rare earth and trace element characteristics of plagiogranite in east Qingshui are different from those of plagiogranite and cumulate gabbro in ophiolite, but are similar to those of massive gabbro. The geochemical characteristics of plagiogranite in east Qingshui and massive gabbro also show partial melting trend. The age of plagiogranite in east Qingshui is(342.0±3.8)Ma, suggesting that it was probably the product of post-collisional tectono-thermal event in early Carboniferous rather than the leucocrate in ophiolite.
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出版历程
收稿日期:  2016-02-17
修回日期:  2016-04-22
刊出日期:  2016-10-24

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