摘要
力资料处理的计算机化和处理结果的彩色化,导致重、磁力资料中的很多隐伏信息得以显示出来,其中的构造信息为研究大型断裂的运动学特征提供了有利的证据。本文以合肥盆地重、磁力资料显示出来隐伏信息为例,研究了合肥盆地东界郯—庐断裂的运动形式,认为至少存在一次左行走滑和一次右行压扭;西界吴集断裂向南延伸至大别山,而不是过去认为的终止于肥中断裂,同时首次指出该断裂燕山早期表现为右行走滑,燕山晚期北段表现为正断层,南段作为肥中断裂下降盘而停止活动或活动较弱。
The computerization of the gravity and magnetic data and the coloration of the processing result have made some of the subtle information of gravity and magnetic data be visible.The tectonic information from which has supplied some good evidence for the study of kinematics features of big fractures.The movement style of Tanlu fracture ,east boundary of Hefei basin,is studied in this paper based on the example of the subtle information shown in the gravity and magnetic data in Hefei basin.It is considered that at least two stages of tectonic movements appeared in this area,one was left-lateral strike-slip and the other was right-lateral strike-slip.The west boundary Wuji fracture went along to Mount Dabie instead of to the formerly considered Feizhong Fracture.And it is firstly pointed out that Wuji fracture was right-lateral strike-slip fault in the early Yanshan movement stage,while in the late stage,the north part of this fracture was a normal fault,and the south part stopped working or weakened being the downthrow block of Feizhong fracture.
出处
《安徽地质》
2004年第1期6-10,60,共6页
Geology of Anhui
