安丘莒县断裂北段构造特征研究

Study on Tectonic Characterisitcs of Northern AnqiuJuxian Fault

摘要:

郯庐断裂带是中国东部乃至亚洲大地构造演化中最重要的构造带，其山东段沂沭断裂带也一直是地学研究的热点，而安丘莒县断裂更是新构造活动频发的活断层。该文在野外实际调查的基础上，从安丘莒县断裂的控盆以及与地质体的切割关系入手，参考区域地质资料，结合物探、钻探研究成果，对安丘莒县断裂北段的几何学、运动学特征进行了综合研究，对其新构造活动进行了初步探讨，认为早白垩世以后的“主活动”具有多阶段性、多期次性，是对早期先存断裂的继承与发展，晚更新世晚期右行走滑兼具小角度逆冲阶段。

Abstract:

TanchengLujiang fault zone is an important tectonic zone in geotectonic evolution in eastern China and even in Asia. Yishu fault zone in Shandong secton is a hotspot, and AnqiuJuxian fault belongs to one of active faults of new tectonic movements. On the basis of field survey, through comprehensive study on the relation between control-basin and kinematics of north AnqiuJuxian fault, referring geological information, combining with geophysical and geochemical studying achievements, geometry and kinematics characteristics along the northern section of Anqiu-Juxian fault have been comprehensively studied, and the new tectonic activity has been preliminarily discussed. It is regarded that after the early Cretaceous, the main activity has the characteristics of multi-stage and multi period. It is the inheritance and development of the former fractures, and late Pleistocene is right walking slide and small angle thrust stage.