大陆伸展构造是指陆块受水平拉伸运动的影响,而形成的一种区域构造作用,当某区域遭到拉张后,在伸展最大的地方断面变得非常平缓。这种低高度拉张断层称为剥离断层。伸展构造对岩石的形成和变形都具有重要的意义。近年来,有人发现伸展构造不仅与煤、石油和天然气等非金属矿产有密切的关系,而且还与很多贵金属矿床的成矿和控矿构造有关。过去被认为的“层控”矿床,现在有人认为是受伸展构造产生的低角度剥离断层控制的。因而对“层控”理论提出了挑 The extensional structure of the mainland refers to the influence of horizontal extensional movement of the land mass, and the formation of a regional tectonic effect. When a certain area is stretched, the cross-section becomes very gentle at the place of maximum extension. This low-height tensile fault is called a detachment fault. The extensional structure is of great significance to the formation and deformation of rocks. In recent years, it has been found that the extensional structure is not only closely related to non-metallic minerals such as coal, oil and natural gas, but also related to the mineralization and ore-controlling structures of many precious metal deposits. The “stratiform” deposits previously thought to be presently thought to be dominated by low-angle detachment faults caused by the extension of the structure. Therefore, the theory of “layer control” is put forward