淮南连锁逆冲断层体系变形分析

淮南一系列走向近东西、南倾逆掩的逆冲断层,断面均下延至一个近水平拆离滑脱面,构成连锁冲断体系。连锁冲断体系的拉伸率(或收缩率)与拆离面以上冲断层的相对扩展速率、相对滑动速率和切入深度间,存在特定的函数关系。虽然目前难以求得数值特解,但可用图解表示岩席应变状况、构造变形特点,估算拆离滑脱带最大埋深和计算盖层的绝对缩短量。研究拆离滑脱面以上岩席体收缩率变化,还可表示断面扩展形式与岩石力学性质的关系,从而阐明淮南连锁冲断体系的区域构造意义。 

ANALYSIS ON THE DEFORMATION OF THE LINKED THRUSTING SYSTEM IN THE HUAINAN REGION,ANHUI PROVINCE

The Huainan Linked Thrusting System consists of a series of south-dipping thrusts and overthrusts with near-EW strike. The certain functional relations exist between the shortening and the relative expanding rate of thrustings along the basement plane, the sliding rate and the depth of dissection. Although it is difficult to get numerical solution up to date, the sheet strain and the characters of the structural strain can be illustrated by graphic solutions. Consequently, the maximum depth of the basement and the shortening of sedimentary sequences could be estimated. In addition, the graphic solution can suggest the relationship between the style of thrusting expansion and the mechanic property of rocks. Forthermore, the explanations of the tectonic significance could be described for the Huainan Linked Thrusting System.