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XU ZhengYu, JIANG Shu, XIONG ShaoYun, LIANG Xing, WANG GaoCheng, GUO YanLing, HE Yong, RAO DaQian. Characteristics and Depositional Model of the Lower Paleozoic Organic Rich Shale in the Yangtze Continental Block[J]. Acta Sedimentologica Sinica, 2015, 33(1): 21-35. doi: 10.14027/j.cnki.cjxb.2015.01.003
Citation: XU ZhengYu, JIANG Shu, XIONG ShaoYun, LIANG Xing, WANG GaoCheng, GUO YanLing, HE Yong, RAO DaQian. Characteristics and Depositional Model of the Lower Paleozoic Organic Rich Shale in the Yangtze Continental Block[J]. Acta Sedimentologica Sinica, 2015, 33(1): 21-35. doi: 10.14027/j.cnki.cjxb.2015.01.003

Characteristics and Depositional Model of the Lower Paleozoic Organic Rich Shale in the Yangtze Continental Block

doi: 10.14027/j.cnki.cjxb.2015.01.003
  • Received Date: 2014-02-24
  • Rev Recd Date: 2014-04-25
  • Publish Date: 2015-02-10
  • To further investigate the Paleozoic organic-rich shale development and distribution characteristics in the Yangtze Continental Block, and the depositional model, we systematically collected and compiled large data sets of organic-rich shales for the Lower Cambrian Niutitang equivalent Formation and Upper Ordovician Wufeng-Lower Silurian Longmaxi equivalent Formation. Outcrop in Zhalagou of Sandu county, Guizhou province and Zhao 104 wells Junlian Prefecture, Sichuan Province were selected for the systematic observation, sample tests, sedimentary facies, and so on. Regional reconstruction of paleogeography and correlation between different regions show that the Yangtze block was passive continental margin during the early Paleozoic and peripheral foreland during early Silurian. Niutitang equivalent shales were deposited in a passive continental margin environment, the upwelling nutrient flow and anoxic events in complex depositional model is interpreted for the depositional model of Lower Cambrian shale in Yangtze Block, organic-rich thick shale was mainly developed in the southeastern margin of the Yangtze block deep water shelf to slope facies; Ordovician Wufeng- Lower Silurian Longmaxi equivalent shales were deposited in the Caledonian orogenic front of the periphery foreland environment, organic-rich thick shale was mainly developed in in the anoxic intra-shelf low setting in southeastern margin of the Upper to middle Yangtze block.
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  • Received:  2014-02-24
  • Revised:  2014-04-25
  • Published:  2015-02-10

Characteristics and Depositional Model of the Lower Paleozoic Organic Rich Shale in the Yangtze Continental Block

doi: 10.14027/j.cnki.cjxb.2015.01.003

Abstract: To further investigate the Paleozoic organic-rich shale development and distribution characteristics in the Yangtze Continental Block, and the depositional model, we systematically collected and compiled large data sets of organic-rich shales for the Lower Cambrian Niutitang equivalent Formation and Upper Ordovician Wufeng-Lower Silurian Longmaxi equivalent Formation. Outcrop in Zhalagou of Sandu county, Guizhou province and Zhao 104 wells Junlian Prefecture, Sichuan Province were selected for the systematic observation, sample tests, sedimentary facies, and so on. Regional reconstruction of paleogeography and correlation between different regions show that the Yangtze block was passive continental margin during the early Paleozoic and peripheral foreland during early Silurian. Niutitang equivalent shales were deposited in a passive continental margin environment, the upwelling nutrient flow and anoxic events in complex depositional model is interpreted for the depositional model of Lower Cambrian shale in Yangtze Block, organic-rich thick shale was mainly developed in the southeastern margin of the Yangtze block deep water shelf to slope facies; Ordovician Wufeng- Lower Silurian Longmaxi equivalent shales were deposited in the Caledonian orogenic front of the periphery foreland environment, organic-rich thick shale was mainly developed in in the anoxic intra-shelf low setting in southeastern margin of the Upper to middle Yangtze block.

XU ZhengYu, JIANG Shu, XIONG ShaoYun, LIANG Xing, WANG GaoCheng, GUO YanLing, HE Yong, RAO DaQian. Characteristics and Depositional Model of the Lower Paleozoic Organic Rich Shale in the Yangtze Continental Block[J]. Acta Sedimentologica Sinica, 2015, 33(1): 21-35. doi: 10.14027/j.cnki.cjxb.2015.01.003
Citation: XU ZhengYu, JIANG Shu, XIONG ShaoYun, LIANG Xing, WANG GaoCheng, GUO YanLing, HE Yong, RAO DaQian. Characteristics and Depositional Model of the Lower Paleozoic Organic Rich Shale in the Yangtze Continental Block[J]. Acta Sedimentologica Sinica, 2015, 33(1): 21-35. doi: 10.14027/j.cnki.cjxb.2015.01.003
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