摘要
伸展构造按其在同一构造旋回中出现的次序可划分为同沉积期的伸展构造和沉积后挤压前的伸展构造两个类型。它们在构造特征、可见性、与变质作用关系、在褶皱时的表现四个方面有着较显著的差别。沉积后挤压前伸展构造具有多发性、局限性和旋回性三个特点。这对于研究区域变质作用、构造和山脉形成有鉴知与启迪的意义。
According to the occurring time in a structural cycle,the extensional structures have divided into syn-sedimentary and post-sedimentary pre-compressional types, which are obviously different in the following aspects: structural features, visibility, relationship withmetamorphism, and their behaviour during faulting. After-sedimentary precompressional extensional structures are multiple,limited and cyclical. These characteristics are helpful to researching regional metamorphism, structures and the forming of mountains.
关键词
伸展构造
构造旋回
地质意义
历史特点
Extensional structure
Tectonic cycle
Multiple
LindtationsCyclicity
Geological significance
