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GAO Yong-juan, LIN Shi-liang, CONG Feng, ZOU Guang-fu, XIE Tao, TANG Fa-wei, LI Zai-hui, LIANG Ting. LA-LCP-MS zircon U-Pb dating and geological implications for the Early Cretaceous volcanic rocks on the southeastern margin of the Tengchong block, western Yunnan[J]. Sedimentary Geology and Tethyan Geology, 2012, 32(4): 59-64.
Citation: GAO Yong-juan, LIN Shi-liang, CONG Feng, ZOU Guang-fu, XIE Tao, TANG Fa-wei, LI Zai-hui, LIANG Ting. LA-LCP-MS zircon U-Pb dating and geological implications for the Early Cretaceous volcanic rocks on the southeastern margin of the Tengchong block, western Yunnan[J]. Sedimentary Geology and Tethyan Geology, 2012, 32(4): 59-64.
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LA-LCP-MS zircon U-Pb dating and geological implications for the Early Cretaceous volcanic rocks on the southeastern margin of the Tengchong block, western Yunnan

  • 1. Chengdu Institute of Geology and Mineral Resources, Chengdu 610081, Sichuan, China;

  • 2. State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, Hubei, China

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  • Received Date: August 19, 2012
  • Published Date: December 29, 2012
    Graphical Abstract
    • Abstract
  • A succession of undated epimetamorphic sedimentary strata occurs in the Gaoligong metamorphic rock zone east of the Tengchong block, western Yunnan. The acidic volcanic rocks in these strata were identified during the 1:50 000 regional geological survey in the stratigraphic sequences of the Tuanpo section, Xuangang, Luxi, and give a zircon U-Pb age of 121.4±1.4 Ma. This age has revealed that the stratigraphic sequences cited above should be dated back to the Early Cretaceous during which the volcanic activities once took place in the study area. The Early Cretaceous felsic volcanic rocks in the study area may owe their origin to the closure of the Nujiang oceanic basin.
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