层间滑动褶皱新见  

New Ideas about Slip Folds between Layers

作　　者：易顺华[1] 张先进[1] 朱章显[2] 余君鹏[1] 李华亮[1] 

机构地区：[1]中国地质大学地球科学学院,湖北武汉430074 [2]中科院宜昌地质矿产研究所,湖北宜昌443003

出　　处：《地球科学（中国地质大学学报）》2007年第5期722-726,共5页Earth Science-Journal of China University of Geosciences

基　　金：西藏定结;陈塘幅1:25万区域地质调查项目(NO20013000147)

摘　　要：本文报道的是出现在许多沉积岩区,发育在厚薄相间岩层之中,并由于层间滑动作用形成的AB复合或过度型褶皱.它具有不止一个方位褶皱枢纽,表征非共轴叠加褶皱形态,经历了早期B形和晚期A形褶皱演化过程,最终形成迄今鲜有报道,但却实际广泛存在.文中首先介绍了这一褶皱在西藏、湖北黄石、湖北秭归,四川西昌等地区的野外产出状态,继而从横剖面、纵剖面、平面以及立体空间角度描叙了它的全方位几何形态特征,进而从变形介质结构和剪应变值(γ)的物性特征方面分析了它的变形控制条件,最后以"滑移褶皱极限"理论并部分借鉴鞘褶皱的形成机理探讨了它的形成演化过程.The AB compound type or transitional type fold appears in many sedimentary areas, between thick and thin layers, made by slipping between layers. The fold has more than one hinges, which is the result of uncoaxal superimposed fold, underwent B type fold in early time and A type fold in late time. There is little report about this fold, however it is ubiquitous. In this paper, the author introduced the output state on field of this fold in Tibet, Hubei Wuhan, Sichuan Xichang firstly, then described the geometry shape characters in all trend of this fold, analyzed the deformation control condition of this fold, finally discussed the form and evolvement mechanisms of this fold based on Slump Fold Limit and reference of the form mechanism of sheath fold.

关 键 词：层间滑动作用 AB复合或过度型褶皱 变形条件 形成机理 

分 类 号：P542[天文地球—构造地质学]