Structure of the Lithosphere and Mesozoic Sedimentary Basins in Western Liaoning, Northern Liaoning, and Songliao, Northeast China

The western Liaoning, northern Liaoning, and Songliao areas represent three different tectonic units with different lithospheric thermal-mechanical properties in terms of composition, thickness of the thermal lithosphere, effective elastic thickness, depth of the detachment surface, and strength of the lithosphere. Western Liaoning is characterized by a thick lithosphere with high rigidity and strength, whereas Songliao and northern Liaoning are characterized by relatively thin lithosphere with low rigidity and strength. These differences controlled the development of distinct types of basins under an extensional regime during the Early Cretaceous. The basins in western Liaoning are controlled by faulting rather than by thermal subsidence. The Songliao basin is controlled both by faulting and by thermal subsidence, and thus both syn- and post-rift sequences developed with the same thickness in the center of the basin. In contrast, in northern Liaoning, the basins are mainly controlled by faulting, and to ...