Characteristics and implications of carbon and oxygen isotope of lacustrine carbonate rocks from Es4s in Dongying Sag
Journal: Scientific Reports
Year: 2026

This study investigates the characteristics and paleoenvironmental implications of carbon and oxygen isotopes in lacustrine carbonate rocks from the Es4s of the Paleogene Shahejie Formation in the Dongying Sag, Bohai Bay Basin, China. Although lacustrine carbonate reservoirs account for a small proportion globally, they are an important and underexplored reservoir type in continental rift basins like the Dongying Sag. Meanwhile, a systematic study of carbon and oxygen isotope geochemistry and pa