Depositional Environment and Organic Matter Enrichment in the Lower Paleozoic Shale from the Northeastern Margin of the Yangtze Platform, South China

In this study, twenty-six core shale samples were collected from the marine Lower Paleozoic in a well northeastern margin of Yangtze Platform. Analyses TOC content, mineral composition, major elements, along with trace and rare earth elements conducted on samples. The results used to investigate depositional conditions their effects organic matter accumulation preservation. Generally, sedimentation period Niutitang Formation was cold arid climate anoxic environments, while Wufeng-Longmaxi formed warm humid oxic environments. addition, formations are characterized by low paleo-productivity. enrichment for study could be simultaneously controlled paleo-redox state Organic is mainly driven preservation rather than productivity, dominant driving factor opposite shale. Additionally, palaeoclimate terrestrial influx intensity found significantly impact findings have implications understanding sedimentary processes, gas potential area.