Depositional environment and organic matter accumulation of Upper Ordovician-Lower Silurian marine shale in the Upper Yangtze Platform, South China

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• 作者：Yanfang Li^a ; Tongwei Zhang^b ; ^{tongwei.zhang@beg.utexas.edu} ; Geoffrey S. Ellis^c ; Deyong Shao^a
• 关键词：Longmaxi Formation ; Palaeoenvironment ; Trace element ; Redox condition ; Primary productivity ; Shale gas
• 刊名：Palaeogeography, Palaeoclimatology, Palaeoecology
• 出版年：2017
• 出版时间：15 January 2017
• 年：2017
• 卷：466
• 期：Complete
• 页码：252-264
• 全文大小：2233 K
• 卷排序：466

文摘

Upper Ordovician Wufeng–Lower Silurian Formation shale was geochemically analyzed. Organic-rich shale intervals were deposited under anoxic to euxinic conditions. Elevated productivity at the lower Longmaxi Formation was induced by P recycling. Changes from strong to moderate restriction during the Late Ordovician to Early Silurian. OM accumulation model was established for the Wufeng and Longmaxi formations shale.