刘松柏, 窦虎, 李海波, 温志刚. 新疆东天山博格达地区晚侏罗世中酸性侵入岩的发现、锆石U-Pb年龄及其地质意义[J]. 地质通报, 2019, 38(2-3): 288-294.
    引用本文: 刘松柏, 窦虎, 李海波, 温志刚. 新疆东天山博格达地区晚侏罗世中酸性侵入岩的发现、锆石U-Pb年龄及其地质意义[J]. 地质通报, 2019, 38(2-3): 288-294.
    LIU Songbai, DOU Hu, LI Haibo, WEN Zhigang. Geological significance of the discovery of Late Jurassic intermediate-acidic intrusive rock in Bogeda area of East Tianshan, Xinjiang, and its U-Pb zircon age[J]. Geological Bulletin of China, 2019, 38(2-3): 288-294.
    Citation: LIU Songbai, DOU Hu, LI Haibo, WEN Zhigang. Geological significance of the discovery of Late Jurassic intermediate-acidic intrusive rock in Bogeda area of East Tianshan, Xinjiang, and its U-Pb zircon age[J]. Geological Bulletin of China, 2019, 38(2-3): 288-294.

    新疆东天山博格达地区晚侏罗世中酸性侵入岩的发现、锆石U-Pb年龄及其地质意义

    Geological significance of the discovery of Late Jurassic intermediate-acidic intrusive rock in Bogeda area of East Tianshan, Xinjiang, and its U-Pb zircon age

    • 摘要: 在1:5万区域地质调查的基础上,在东天山博格达石结子、菜籽沟地区,新发现了二长花岗岩、闪长岩。采用LA-ICPMS技术测得二长花岗岩和闪长岩中锆石的206Pb/238U年龄分别为154.9±1.9Ma和152.7±1.8Ma,表明岩体侵入时间为晚侏罗世。该发现证实了东天山地区存在晚侏罗世岩浆活动,为准噶尔-东天山中生代岩浆活动事件积累新的资料,对于研究东天山乃至北疆中生代构造岩浆演化具有重要意义。

       

      Abstract: On the basis of 1:50000 regional geological survey in the Bogurda region of eastern Tianshan, the authors found monzonitic granite and diorite for the first time in Shijiezi and Caizigou area. Though U-Pb dating of monzonitic granite and diorite zircon by LA-ICP-MS technology, the authors obtained the fairly exact age data of 154.9±1.9 Ma and 152.7±1.8Ma, which suggest that the intrusion occurred in Late Jurassic. These are the first dating data for Mesozoic intermediate-acid intrusive rocks in Bogurda region. These data confirmed that the eastern part of Tianshan experienced magmatic activity in Late Jurassic. The results obtained by the authors provide new data for the event of the Mesozoic magmatism in the Junggar-Eastern Tianshan region, thus having great significance for studying tectonic magmatic evolution of the Eastern Tianshan region even the whole North Xinjiang.

       

    /

    返回文章
    返回