淮南连锁逆冲断层体系变形分析

DEFORMATION ANALYSIS OF THE THRUST-TYPE LOCK-IN FAULT SYSTEM IN HUATNAN

淮南地区一系列走向近东西,南倾逆断层,断面均下延收敛于一个近水平的拆离滑脱面,构成连锁逆冲断层体系。断层体系压缩率与相对扩展速率、相对滑动速系和发育深度间,具有特定的函数关系。目前,虽难以求其数位特解,但可用图解法表示断块内应变状况;构造变形特点,计算盖层绝对缩短量和拆离滑脱面的最大埋深。研究席体收缩率变化规律,可揭示断面扩展形式与岩石力学性质的关系。从而阐明连锁逆冲断层体系在区域构造上的意义。

A seres of nearly EW trending, southward dipping thrusts in Huainan, Anhui, mingled downward to become one single nearly shallow detachment fault,forming thrust-type, lock-in fault systm. The rate of shortening of lock-in system has a specific fuction relation to relative slidind rate of each thrust-slice, relative spreading rate of fault and the extending of the fault planes though presently; it is difficult to get the numerical solution, it is possible to use diagrams to describle the strain; tectonic style and deformation ;the maximum depth of thedetachment fault,and the abslute shortening of cover. Through revealing of the regularity of the relative contruction rate of the system,it is possible to reflect the relation between the fault spreading rate and the rock mechanic property of the sheet. And explain the regional tectonic significance of the lock-in fault system.