Volume 24 Issue 4
Aug.  2018
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Article Navigation >  Journal of Geomechanics  > 2018  >  24(4): 533-543
LIU Gaofeng, WANG Bin, CHEN Shihai, et al., 2018. ZIRCON U-PB DATING AND GEOCHEMICAL FEATURES OF CHAHANCHAHA GRANITE FROM WESTERN TIANSHAN, XINJIANG: IMPLICATIONS FOR TECTONIC EVOLUTION. Journal of Geomechanics, 24 (4): 533-543. DOI: 10.12090/j.issn.1006-6616.2018.24.04.056
Citation: LIU Gaofeng, WANG Bin, CHEN Shihai, et al., 2018. ZIRCON U-PB DATING AND GEOCHEMICAL FEATURES OF CHAHANCHAHA GRANITE FROM WESTERN TIANSHAN, XINJIANG: IMPLICATIONS FOR TECTONIC EVOLUTION. Journal of Geomechanics, 24 (4): 533-543. DOI: 10.12090/j.issn.1006-6616.2018.24.04.056
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ZIRCON U-PB DATING AND GEOCHEMICAL FEATURES OF CHAHANCHAHA GRANITE FROM WESTERN TIANSHAN, XINJIANG: IMPLICATIONS FOR TECTONIC EVOLUTION

doi: 10.12090/j.issn.1006-6616.2018.24.04.056
  • 1.

    School of Earth Sciences and Engineering, Nanjing University, Nanjing 210093, Jiangsu, China

  • 2.

    Geological Survery of Jiangxi province, Nanchang 330030, Jiangxi, China

More Information
  • Received: 2017-12-13
  • Revised: 2018-05-22
  • Published: 2018-08-28
    Abstract
  • The Chahanchaha granitic body outcrops in the southeast part of the western Tianshan Mountains, Xinjiang, and it is located in the Nalati-Central Tianshan intrusive rock belt at the northern edge of the fault, south margin of the Central Tianshan. The rock type is dominated by granodiorite and monzonitic granite with weak gneissic foliation. The zircon U-Pb dating results indicate that the Chahanchaha granitic rocks formed at 421±6.2 Ma. The geochemical characteristics suggest that the granitic rocks are grouped in metaluminouscalc-alkaline Ⅰ-type granite, which exhibits typical characteristics of intrusive rocks in the continental arc. These data demonstrate that the paleo-south Tianshan ocean crust has started northward subduction at late Silurian, resulting in a continental arc upon the overriding plate.

     

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