郯庐断裂带的最大左行走滑断距及其形成时期  

THE MAXIMUM SINISTRAL STRIKE-SLIP AND ITS FORMING AGE OF TANCHENG-LUJIANG FAULT ZONE

作　　者：万天丰[1] 朱鸿[1] 

机构地区：[1]中国地质大学

出　　处：《高校地质学报》1996年第1期14-27,共14页Geological Journal of China Universities

摘　　要：作者采用断裂带两盘地壳变形速度的估算方法，求得郯庐断裂带最大左行走滑断距为３９０ｋｍ；根据中朝地块南缘断裂被错断的现象来判断，最大左行走滑断距为４３０ｋｍ；采用古地磁学方法求得最大左行走滑断距约为３００～４００ｋｍ。最大左行走滑活动时期当在中晚三叠世。侏罗纪时期郯庐断裂带为逆断层，白垩纪时期的走滑活动量不大于１００ｋｍ，早第三纪的走滑断距不明显，晚第三纪一早更新世可能有５０ｋｍ左右的左行走滑断距，新构造期（０．７３Ｍａ以来）的有行走滑断距小于１００ｍ。Using the estimating method of earth crust deformation velocity from the displacement of the opposite walls of Tan-Lu fault zone, the maximum sinistral strike-slip of the fault zone is suggested as 390 km. According to the displacement of south marginal fault o f Sino-Korean block, the maximum sinistral strike-slip of Tan-Lu fault zone is estimated to be 430km. By the paleomagnetic method, the strike-slip is about 300-400km. The forming age of maximum sinistral strike-slip occurred in Middle-Late Triassic. In Jurassic, the TanLu fault was a reverse one. The strike-slip in Cretaceous was more than 100km, and that in Eogene was nuclear. In the Neogene-Early Pleistocene, about 50km of sinistral displacement occurred along the Tan-Lu fault zone. From. 0. 73Ma on (Neotectonic stage), the dextral strike-slip is less than 100m

关 键 词：郯庐断裂带 走滑断距 断层 形成时期 

分 类 号：P542.3[天文地球—构造地质学]