复式半背斜及其形成的动力学初探

作者于1980年提出了《复式半背斜》术语。根据近年来研究,可以断定,它是一个广泛存在的构造型。它具有一系列特征,如:1.连续发育的褶皱呈束状,褶皱束的中部略向前突出呈一弧形;2.物质水平运动具有明显定向性;3.复式半背斜为一巨型断裂限制,在此断裂的一侧离开限制性断裂的距离越大,复式半背斜所暴露的地层带的年龄就越年轻,在另一侧不存在与复式半背斜相应的地质构造,而出现花岗岩带、地槽褶皱带或古老的基岩,等等。笔者划分出复式半背斜的五种动力学类型:1.重力滑动型;2.深断裂挤压型;3.重力滑动与深断裂挤压复合型;4.早期重力滑动与晚期断裂深部挤压复合型;5.深断裂挤压与重力扩张复合型。

HEMIANTICLINORIUM AND THE DYNAMICS OF ITS FORMATION

The author of this paper put forward a term "Hemianticlinorium"in 1980. The study in recent years indicates that hemianticlinorium is a wide distributed structural style in the world. Hemianticlinorium has a series of characteristics, for example; 1. A group of folds extends as a zone and bends forword in the arc form in its middle part; 2. Lateral movement of rock materials is clearly orientated; 3. A great fault always limits the hemianticlinorium, In one side of the fault, the further the distance from the limit. fault,the younger is the age of strata zone exposed in the hemianticlinorium. In its other side, no geological structure corresponding to the hemianticlinorium occurs, but granit body, geosynclinal folded zone or old basement rocks, etc. are found. Hemianticlinorium is divided into five dynamics types: 1. The gravity sliding; 2. The deep fault compression; 3. The gravity sliding with the fault compression in epidermic; 4. The early gravity sliding with the late fault compression 5. The deep fault compression with the gravity spreading.