Abstract:

Two independent but interrelated Cenozoic structural systems—extensional structure and strike-slip structure developed in the Liaodongwan-Xialiaohe Basin.The extensional structure was the main structure styled in half graben-half horst assemblage that con-trolled the formation and evolution of the basin.The strike-slip structure was distributed in the east margin of the basin,reconstructed the extentianal structure and consisted of ligh-angle or nearly vertical basement strike-slip faults and verious associated structures including linar graben and horst,echelon folds,volcanic and mudstone diapir structures.The strike-slip structure with a dextral character may be related with activity of Tanlu deep fault since Oligocene.