海拉尔盆地构造演化及对沉积的控制作用

Tectonic evolution and its controlling on sedimentation in Hailar Basin

中新生代海拉尔裂谷盆地发育于晚古生代华北板块和西伯利亚板块的碰撞造山带上,主要经历了三个构造幕,自下而上表现为下部伸展裂陷、中部拆离滑脱和上部拗陷。盆地演化过程中又受到由于中下地壳物质流动导致的局部隆升作用和后期强烈的挤压作用的影响,使得海拉尔盆地成为具有伸展、走滑、挤压等多种构造样式并存的复杂裂谷盆地。多期次的构造活动、多类型的构造样式对盆地内沉积体系的时空配置起着重要的控制作用。

Hailar Basin is a Late Mesozoic-Cenozoic continental rift basin,which is superimposed on the late Paleozoic collision orogenic belt that lied between the North China Plate and Siberia Plate.The basin underwent three episodes.From bottom to top,it was characterized by the expanding and rifting function,the detachment and strike-slip function,and the depression function.In the process of tectonic evolution,it was also affected by the uplifting that was caused by the middle-lower crustal materials flowing and strong tectonic compression latterly,which made it one of the most complex rift basins that has many kinds of structural style,such as extensional structure,strike-slip structure,compression structure and so on.Multi-stage of tectonic movement and multi-type tectonic style controlled the space-time configuration of basin sedimentary system.