中新生代辽河盆地区域应力场变化及其成因

中新生代辽河盆地的形成和发展受控于多期区域应力场变化。对构造现象、火山活动、层序充填型式等多种实际资料的分析表明：辽河盆地经历了侏罗纪末－白垩纪早期、古新世中后期、始新世中后期、中新世等右旋张扭应力场作用阶段，以及白垩纪晚期－古新世初期、始新世早中期、渐新世、上新世以来等左旋压扭应力场作用阶段。区域应力场变化可以用地球自转速度变化引起的岩石圈板块活动及触发的深部过程来解释，亦与先期构造形迹和盆地边界条件有关。不同区域应力场的转化不仅导致了盆地演化的旋回性，也为辽河盆地及其邻区中新生代多套含油气层系的形成奠定了物质基础。

VARIATION AND GENESIS OF REGIONAL STRESS FIELD OF LIAOHE BASIN IN MESO-CENOZOIC

The formation and evolution of Liaohe Meso Cenozoic Basin were controlled by the variation of different regional stress field. Based on the analyses of structural features, volcanic activities, sequence construction and so on, It is believed that Liaohe Basin has experienced the period of dextral transtensional stress field in Late Jurassic Early Cretaceous, Middle and Late Paleocene, Late Eocene, Miocene, and also the period of sinistral compresso shear stress field in Late Cretaceous, Early Paleocene, Early and Middle Eocene, Oligocene, Pliocene. The variation of regional stress field can be genetically interpreted by the rotation speed variation of the earth and its impact on the movement of lithosphere plate and deep processes of the earth, it is also related to the earlier structural feature and boundary of the basin. This variation not only results in the cyclicity of basin evolution, but also the formation of multiple oil bearing sequence of Meso Cenozoic in Liaohe Basin and adjacent its areas.