松辽盆地中、新生代构造特征及其演化

松辽盆地发育在大陆内部古生宙－元古宙基底之上，出现在中生代火山岩带的后缘，经历了晚侏罗世地幔上隆、陆壳坳陷，早白垩世大规模岩浆上涌、引张裂陷、晚白垩世盆地挤压、构造反转和新生代较小幅度伸展断陷多阶段的构造演化。研究表明，发生在松辽盆地的从岩石圈伸展减薄到挤压增厚再到拉伸的复杂动力学演化过程是中生代伊泽奈崎大洋岩石圈朝东亚陆缘俯冲－碰撞作用的结果，松辽盆地的形成演化与洋壳运动方向、俯冲角度、俯冲速率的变化、俯冲带位置的迁移、大陆内部对洋壳消减了作用的响应方式等因素密切相关。

Mesozoic-Cenozoic Tectonic Features and Evolution of the Song-Liao Basin, NE China

The Song_Liao Basin was developed on the Proterozoic_Paleozoic basement within the continental blocks of NE_China and distributes along the back_arc area of the western Pacific subduction zone. This basin was subject to a polyphase tectonic evolution, mainly including Late Jurassic depression of continental crust due to the upwell of asthenosphere, a large_scale Early Cretaceous intermediate_acid magmatism and back_arc extension, Late Cretaceous compression of basins and inversion tectonics, and Cenozoic extension and small_scale depression. The complex geodynamic evolution of the Song_Liao Basin from lithosphere extension and thinning through compression and thickening then to extension was caused and constrained by the Mesozoic subduction of the Izanagi oceanic plate toward the eastern Asian continental margin, and the formation and evolution of the Song_Liao Basin are closely related to the movement direction, subduction angle, subduction velocity, migration of subduction zone and response of inland area on oceanic subduction.