永安复杂断裂带断裂特征及构造模式研究

Research of fault characteristics and tectonic model of Yong’an complex fault zone

本文在总结断裂带构造格局的基础上对断裂几何学及运动学进行深入分析,并通过断层生长指数、古落差的研究,证明了汉留断层的走滑性质及其既有持续生长的特点又有幕式活动的特点。理顺了该区的断层级别序次和组合样式并在此基础上提出了该区构造模式,即汉留断层和真武分支断层的几何形态以及两者的搭配关系产生的不同应力场,分为四个区域,每个区域具有不同的断层组合形式。

Based on analysis of fault geometry and kinematics,and combined with growth index and paleo fall of fault,it is demonstrated that strike-slip of Hanliu fault has not only characteristics of sustained growth but also characteristics of episodic migration.On the basis of the district-level fault sequence and style of combination,it was proposed to a structural model for this region,that is different stress fields created by collocation and geometric configuration of Hanliu fault and Zhenwu branch fault,which can be divided into four regions with different combinations of fault.