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Gold Science and Technology ›› 2017, Vol. 25 ›› Issue (6): 9-20.doi: 10.11872/j.issn.1005-2518.2017.06.009

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Paleozoic Terrane Was Found in the Middle Part of the Ganzi-Litang Suture Zone,West Sichuan: Evidences from the Detrital Zircon Geochronology

GUO Yuncheng 1,3,LIU Jiajun 1,2,MAO Shidong 3,LI Hu 1,3   

  1. 1.School of Earth Sciences and Resources,China University of Geosciences,Beijing   100083,China;
    2.State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Beijing 100083,China;
    3.No.12 Gold Geological Party of CAPF, Chengdu   611732,Sichuan,China
  • Received:2017-04-14 Revised:2017-08-31 Online:2017-12-30 Published:2018-05-18

Abstract:

 The metamorphic quartz sandstones in the Ganzi-Litang suture zone experience low grade of metamorphism,no fossil samples were found during the field work.The sedimentary succession was deposited on the coastal and shallow sea environments.Ages of detrital zircons from the metamorphic quartz sandstones have a population ranging mainly from 3 264 to 495 Ma,yield five U-Pb age clusters of 544~495 Ma,1 000~730 Ma,1 220~1 050 Ma,1 563~1 367 Ma and 1 761~1 648 Ma,beside three old Archean zircon grains,therefore,the rocks have maximum depositional ages of 495 Ma.Compared with the detrital zircons histogram feature and stratigraphic assemblage characteristics from adjacent regions,the data suggests that the zircon grains have very complicated sources,but mainly from the western margin of the Yangtze Block.

Key words: Key words, detrial zircon, U-Pb geochronology, sedimentary succession, structural cause, Ganzi-Litang suture zone, tectonic evolution

CLC Number: 

  • P597

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