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XU Xue-yi, MA Zhong-ping, XIA Zu-chun, et al. TIMS U-Pb Isotopic Dating and Geochemical Characteristics of Paleozoic Granitic Rocks from the Middle-Western Section of Tianshan[J]. Northwestern Geology, 2006, 39(1): 50-75.
Citation: XU Xue-yi, MA Zhong-ping, XIA Zu-chun, et al. TIMS U-Pb Isotopic Dating and Geochemical Characteristics of Paleozoic Granitic Rocks from the Middle-Western Section of Tianshan[J]. Northwestern Geology, 2006, 39(1): 50-75.
shu

TIMS U-Pb Isotopic Dating and Geochemical Characteristics of Paleozoic Granitic Rocks from the Middle-Western Section of Tianshan

  • 1.

    Xi'an Institute of Geology and Mineral Resources, Xi'an 710054, China

  • 2.

    Xi'an Institute of Geology and Mineral Resources, Xi'an 710054, China;Department of Geology, Northwest University, Xi'an 710069, China

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  • Received Date: October 17, 2005
  • Revised Date: January 08, 2006
  • Published Date: March 04, 2006
    Graphical Abstract
    • Abstract
  • The results of TIMS U-Pbisotopic dating for the Paleozoic granitic rocks from the middle-western section of Tianshan show that,the ages of four granitic rock bodies,plagiogranite,alkali feldspar granite,granodiorite and quartz diorite,intruded into Ordovician Kekenaike Group distributing between Tuokeshun and Kumishi,Central Tianshan,are 424.1±1.1 Ma,395.1±0.9 Ma,393.2±1.4 Ma and 327.3±0.9 Ma,respectively,which reveal three stages of structure-magma events in middle section of Central Tianshan,occurred in Early Silurian,Middle Devonian and Early Carbon iferous,respectively;the biotite granite from Hax legendaban,Central Tiang shan,formed in 286.8±0.8 Ma;the granodio rite from Guozigou,Huocheng County,granodiorite from Zhao shu coalmine,and bojite from Zheketai,Xinyuan County,all of which distribute in the Carbon iferous to Permian riftbelt of Yili,formed in 351.9±1.6Ma,348.4±0.8 Ma and 308.3±1.2 Ma,resp ectivel.The hornblende-plagiog ranite and biotite granitefrom the southern section of Du-ku Road,Kuergan,formed in 426.3±1.9 Ma and 425.1±1.8 Ma,respectively.
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