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2018 Vol. 24, No. 2
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Jinchao LI, Huilei KONG, Yazhi LI, Xianzheng GUO, Norbu NAMKHA, Xianxiao WANG, Qunzi JIA, Bin ZHANG, Xuegang YAO. ZIRCON U-PB DATING, GEOCHEMICAL CHARACTERISTICS AND METALLOGENIC SIGNIFICANCE OF GRONODIORITE PORPHYRY FROM THE XIZANGDAGOU GOLD DEPOSIT IN EAST KUNLUN, QINGHAI PROVINCE[J]. Journal of Geomechanics, 2018, 24(2): 188-198. doi: 10.12090/j.issn.1006-6616.2018.24.02.020
Citation: Jinchao LI, Huilei KONG, Yazhi LI, Xianzheng GUO, Norbu NAMKHA, Xianxiao WANG, Qunzi JIA, Bin ZHANG, Xuegang YAO. ZIRCON U-PB DATING, GEOCHEMICAL CHARACTERISTICS AND METALLOGENIC SIGNIFICANCE OF GRONODIORITE PORPHYRY FROM THE XIZANGDAGOU GOLD DEPOSIT IN EAST KUNLUN, QINGHAI PROVINCE[J]. Journal of Geomechanics, 2018, 24(2): 188-198. doi: 10.12090/j.issn.1006-6616.2018.24.02.020
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ZIRCON U-PB DATING, GEOCHEMICAL CHARACTERISTICS AND METALLOGENIC SIGNIFICANCE OF GRONODIORITE PORPHYRY FROM THE XIZANGDAGOU GOLD DEPOSIT IN EAST KUNLUN, QINGHAI PROVINCE

  • 1.

    Xi'an Center of China Geological Survey, Xi'an 710054, Shannxi, China

  • 2.

    Key Laboratory for the Study of Focused Magmatism and Giant Ore Deposits, MLR, Xi'an 710054, Shannxi China

  • 3.

    School of Earth Science and Resources, Chang'an University, Xi'an 710054, Shannxi, China

  • 4.

    Shannxi Provincial Land Engineering Construction Group, Xi'an 710075, Shannxi, China

  • 5.

    Qaidam Integrated Geological Exploration Institute of Qinghai Province, Golmud 816000, Qinghai, China

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Received Date:  05 December 2017
Revised Date:  05 February 2018
    Abstract
  • The Xizangdagou gold deposit lies in the Bayan Har tectonic belt of East Kunlun. LA-ICP-MS zircon U-Pb dating shows that the weighted mean age of granodiorite porphyry, which is closely related with the mineralization of the Xizangdagou gold deposit, is (225.0±1.2)Ma, in the Late Triassic. This suite of rocks are enriched in LILE (such as Rb, Sr, Ba, K), LREE and Pb, relatively depleting in HFSE (such as Nb, Ta, P, Ti), with rich LREE and low HREE. Based on the study of evolutionary characteristics of regional structures and chronologic data of gold deposits in East Kunlun, the authors suggest that the granodiorite porphyry in the Xizangdagou gold deposit was formed under a conversion tectonic setting from compressional to extensional, and the Xizangdagou gold deposit formed at 225.0~218.6 Ma, in the Late Triassic.
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