Paleoclimatic and Paleogeographic Reconstructions of Sedimentation Conditions in the Fushun Basin Using Methods of Mathematical Statistics

Abstract

The relationship between climate changes and sedimentation conditions for four accumulation stages of the Fuxing and Shahai coal-bearing formations of the Fushun coal basin in the Aptian–Albian has been established using mathematical statistical methods. As a result, it has been revealed that the increase in climate humidity coincided with the widespread anoxic oceanic Paquie event (Paquie, OAE1b) in the Early Albian. In addition, a significant effect of facies conditions on the intensity of accumulation of peat and coal of the Fuxing and Shahai coal-bearing formations has been revealed. The activation of peat accumulation and coal formation processes was promoted by an increase in climate humidity, an activation of input of clastic material, and a decrease in water level in freshwater reservoirs of the Fuxing basin.