Organic matter accumulation on the Dalong Formation (Upper Permian) in western Hubei, South China: Constraints from multiple geochemical proxies and pyrite morphology

Organic-rich black shales in the Upper Permian Dalong Formation are considered excellent source rocks in the western Hubei Basin, South China. However, the mechanisms of organic matter (OM) accumulation remain controversial. Furthermore, the evolution of primary productivity and ocean hypoxia during the Late Permian in the western Hubei Basin is unclear. In this study, we discuss the paleoclimate, paleoceanography, paleoenvironment and the...