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新生代火山岩含有丰富的上地幔岩包休和高压巨晶，火山岩系列、岩石类型、痕量元素等特征以及空间分布特征和与俯冲作用有关的中生代火山岩截然不同，其岩石学特征及热力学研究等表明它们形成于大陆裂谷构造环境。根据出露地表的古老的变质岩系和新生代玄武岩中的上地幔岩包体的岩石学特征以及热力学计算，建立了陆壳一上地幔结构岩石学剖面，新生代岩石圈拉伸，软流圈上隆，为一减薄的陆壳结构，形成了下辽河等一些大陆裂谷型盆地。
The Cenozoic volcanic rocks are rich in features of the upper mantle peltate and high-pressure megacrysts, volcanic series, rock types, trace elements and their spatial distribution and are distinguished from the Mesozoic volcanic rocks related to the subduction. Their petrological characteristics and thermodynamics Indicating that they formed in the continental rift tectonic setting. According to the petrological characteristics and thermodynamic calculation of the upper mantle lithosphere in the Cenozoic metamorphic rocks and Cenozoic basalts exposed from the surface, the lithological profile of the continental crust-upper mantle structure was established. The Cenozoic lithosphere stretching, Ring Shanglong, a thinned continental crust structure, formed the Lower Liaohe and some continental rift basin.