oa INFLUENCE OF MARINE INCURSIONS ON SOURCE ROCKS IN A SALINIZED LACUSTRINE BASIN IN THE PALEOGENE EASTERN CHINA

Marine incursion is one of the possible mechanisms for the salinization of lacustrine basins, especially in the Paleogene eastern China. However, the influence of marine incursions on source rocks in salinized lacustrine basins is challenging and controversial. Here, we examine this issue using a case of the Paleogene Biyang Depression (BD) eastern China, addressing organic matter (OM) accumulation and unconventional hydrocarbon potential. Our data suggests that marine incursions have positive influence on both OM accumulation and unconventional hydrocarbon potential of source rocks in salinized lacustrine basin. However, further study on influence of different degrees (e.g., landward distance, overall water depth, and seawater-freshwater mixing) of marine incursions on source rocks in salinized lacustrine basins are still needed, especially during sea-level fluctuations.