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Article Navigation >  PETROLEUM GEOLOGY & EXPERIMENT  > 2019  >  41(3): 311-318
GAO Shunli, ZHAO Hong, WANG Jianqiang, XU Xi, HOU Kaiwen, LI Xuanyue. Zircon U-Pb dating and its significance in Jiaojiang Sag, East China Sea Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2019, 41(3): 311-318. doi: 10.11781/sysydz201903311
Citation: GAO Shunli, ZHAO Hong, WANG Jianqiang, XU Xi, HOU Kaiwen, LI Xuanyue. Zircon U-Pb dating and its significance in Jiaojiang Sag, East China Sea Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2019, 41(3): 311-318. doi: 10.11781/sysydz201903311
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Zircon U-Pb dating and its significance in Jiaojiang Sag, East China Sea Basin

doi: 10.11781/sysydz201903311

  • 1. CNOOC China Limited-Shanghai, Shanghai 300451, China;

  • 2. State Key Laboratory of Continental Dynamics, Northwest University, Xi'an, Shaanxi 710069, China;

  • 3. China Aero Geophysical Survey and Remote Sensing Center for Land and Resource, Beijing 100083, China

  • Received Date: 2018-08-09
  • Rev Recd Date: 2019-04-15
  • Publish Date: 2019-05-28
    Abstract
  • Using zircon U-Pb dating as the main analysis method, the age of the pre-Cenozoic sedimentary basement was determined and the sediment source in the sag during the fault depression was traced in the Jiaojiang Sag, East China Sea Shelf Basin. The pre-Cenozoic basement of Jiaojiang Sag is dominated by magmatic rocks. The age distribution of detrital zircons is complex, with the main peak age of 227 Ma, mainly formed in the late Indosinian period. The formation environment belongs to the oceanic island arc environment, which is consistent with the existing magmatic records of Lishui East Sub-Sag and Yushandang Low Uplift. The clastic zircons of the Paleocene Mingyuefeng Formation have typical magmatic characteristics, with the main zircon peak ages ranging from 140 Ma to 90 Ma. The formation environment belongs to a continental margin environment. The Paleocene provenance of Jiaojiang Sag is relatively single, which is comparable to Lishui Eastern Sub-Sag. The Yandang Low Uplift in the east of Jiaojiang Sag provides a continuous provenance supply during the Paleocene fault depression.

     

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