郯庐断裂带的最大左行走滑断距及其形成时期

郯庐断裂带的最大左行走滑断距及其形成时期

万天丰朱鸿

中国地质大学

收稿日期:1996-03-20 修回日期:1996-03-20 出版日期:1996-03-20 发布日期:1996-03-20

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

Wan Tianfeng, Zhu Hong

China University of Geosciences, Beijing 100083

Received:1996-03-20 Revised:1996-03-20 Online:1996-03-20 Published:1996-03-20

摘要/Abstract

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－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)的右行走滑断距小于lOOm。

Abstract: Using the estimating method of earth crust deformation velocity from the displacement of the opposite walls of Tan-Lu fault zone, the maxim um sinistral strike-slip of the fault zone is suggested as 390km. According to the displacement of south marginal fault of 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 Tan-Lu fault was a reverse one. The strike slip in Cretaceous was more than 100km, and that in Eogene was unclear. 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 100 m.

万天丰朱鸿. 郯庐断裂带的最大左行走滑断距及其形成时期[J]. J4.

Wan Tianfeng, Zhu Hong. THE MAXIMUM SINISTRAL STRIKE-SLIP AND ITS FORM ING AGE OF TANCHENG-LUJIANG FAULT ZONE[J]. J4.