褶皱相关断层——以库车坳陷新生界盐上构造层为例  

FOLD-RELATED FAULTING:AN EXAMPLE FROM THE CENOZOIC SALT-OVERLYING BEDS IN THE KUQA DEPRESSION

作　　者：邬光辉[1] 罗春树[1] 胡太平[1] 黄广建[1] 席勤[1] 李文华[1] 

机构地区：[1]中国石油天然气股份有限公司塔里木油田分公司勘探开发研究院,新疆库尔勒841000

出　　处：《地质科学》2007年第3期496-505,共10页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：国家"十五"重点科技攻关项目(编号:2004BA616A02)的部分成果

摘　　要：以盐构造解析的方法,综合地震与地质资料,表明库车坳陷新生界中的盐上断层受控于褶皱作用。盐上地层首先发生褶皱变形,随着褶皱作用的加强,然后发生断裂作用,盐上构造层的变形方式为褶皱相关断层,其变形特征不同于断层相关褶皱。从断层成因机制可见:断层相关褶皱理论不适用于库车新生代坳陷盐构造发育区。库车坳陷膏盐层的发育造成盐上构造层与盐下构造层变形有差异,盐上构造层以褶皱作用为主,盐下构造层以冲断作用为主。库车坳陷盐上构造层主要为褶皱相关断层,发育张性断块、后翼突破断层、前翼突破断层及褶皱相关断层组合等构造样式,根据盐上构造层的变形特征总结了褶皱相关断层的演化。There were three structural layers in the Cenozoic Kuqa Depression, in ascending order, the salt-underlying beds, the salt （or gypsum） beds and the salt-overlying beds. The salt structures were well developed and resulted in the structural deformation of the salt-underlying and salt-overlying beds being obviously different. The thrusting dominated the salt-underlying beds, while in the salt-overlying beds the deformation was mainly folding. The surface geological survey and seismic profiles showed that the salt-overlying beds was folded first, then the faulting developed with the strengthen of folding action. The deformation characteristics of the salt-overlying beds might be fold-related faulting, instead of the fault-related folding which was not applicable in the salt structure-developing areas in the Kuqa Depression. The patterns of the fold-related faulting in the salt-overlying beds included the extensional block, back limb break-up fault, front limb break-up fault, and the combination of them. The mechanism and evolution of the fold-related faults was discussed according to the deformational features of the salt-overlying beds in the Kuqa Depression.

关 键 词：盐构造 褶皱相关断层 断层相关褶皱 盐上构造层变形 库车新生代坳陷 

分 类 号：P542[天文地球—构造地质学]