鲁西隆起北缘帚状构造的厘定及成因机制

Brush structure and its genetic mechanism on the northern margin of the Luxi uplift

鲁西隆起北缘章丘—淄博一带，在古生界—中生界沉积盖层中，发育一系列规模不等的南北向—北北西向—北西向大型弧形脆性断裂构造带，它们均具有相似的变形特征和运动学机制，在平面上有规律地组合在一起，构成一个大型张扭性帚状断裂构造系统。其形成及演化受控于与其相毗邻的北北东向沂沭断裂带的活动，是沂沭断裂带在燕山晚期发生北北东向左行扭动所派生的低序次构造应力场的产物。

In the area of Zhangqiu Zibo on the northern edge of the Luxi uplift, there are a series of NS NNW NW trending large arcuate brittle fracture belts formed in the Paleozoic Mesozoic sedimentary covers, which have similar deformation features and kinematic mechanisms. In plan these fracture belts combine regularly to form a large scale tenso shear brush fracture structure system. Its formation and evolution were controled by the activity of the NNE trending Yishu fault belt. It is the result of deformation of the low sequence tectonic stress field induced by the NNE sinistral shear of the Yishu fault belt in the late Yanshanian.