Journal of Jilin University(Earth Science Edition) ›› 2019, Vol. 49 ›› Issue (1): 53-64.doi: 10.13278/j.cnki.jjuese.20180105

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Silurian-Carboniferous Petrographic Features and Depositional Facies in the Well CSDP-2 in the Central Uplift of the South Yellow Sea Basin

Gao Xiaohui1,2,3, Zhang Xunhua3,4, Cai Laixing2,3, Guo Xingwei2,3, Li Wenqiang2,3   

  1. 1. College of Marine Geosciences, Ocean University of China, Qingdao 266100, Shandong, China;
    2. Qingdao Institute of Marine Geology, China Geological Survey, Qingdao 266071, Shandong, China;
    3. Laboratory for Marine Mineral Resources, Pilot National Laboratory for Marine Science and Technology(Qingdao), Qingdao 266071, Shandong, China;
    4. Nanjing Center, China Geological Survey, Nanjing 210016, China
  • Received:2018-05-14 Published:2019-01-18
  • Supported by:
    Supported by National Natural Science Foundation of China (41776081,41210005),National Marine Geology Special Project of China (DD20160147) and Aoshan Science and Technology Innovation Project of Pilot National Laboratory for Marine Science and Technology (Qingdao)(2015ASKJ03)

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Abstract: The Well CSDP-2 of continental shelf drilling program is the only deep well in the central uplift of South Yellow Sea at present, so it has reference value for revealing the Mesozoic-Paleozoic marine stratigraphic epoch and restoring the depositional environment and tectonic movement. Based on the core description and thin-section examination of the rocks,combined with logs and fossils,the Silurian-Carboniferous strata are divided into Lower Silurian Gaojiabian,Houjiatang-and Fentou Forma-tions;Upper Devonian Wutong Formation;Lower Carboniferous Gaolishan-and Hezhou Formations;Upper Carboniferous Huanglong and Chuanshan Formations. Among them,a set of shallow-sea shelf facies with fine clastic rocks were deposited in Silurian. The Devonian Wutong is characterized by the coexistence of stable quartz sandstone and purple red mudstone,with lower tidal flat facies and upper delta facies. Carboniferous is dominated by bioclastic limestone and muddy limestone,mainly developed in platform,lagoon and grain-beach subfacies of carbonate platform. The regional stratigraphic correlation shows that the lithologic sequence of Silurian-Carboniferous is basically consistent with that of the Lower Yangtze land area,indicating that the Mesozoic-Paleozoic marine strata in the South Yellow Sea basin were the extension of the Lower Yangtze platform from land to sea.

Key words: continental shelf drilling program, South Yellow Sea basin, Silurian-Carboniferous, petrology, depositional environment

CLC Number: 

  • P736.2
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