【摘要】 正断层的分段构造型式及其扩展演化机制的核心内容可以归结为正断层的中继构造模式。本文从正断层的断块变形、断裂扩展以及断裂力学特征等角度,总结了正断层中继构造的扩展演化机制。正断层的断块变形是指分段断层位移转换形成的中继斜坡,可分为内倾和外倾两种斜坡类型,位移曲线揭示了中继带变形的特征。正断层的断裂扩展有多种扩展方式,可分为断层内、断层间和断层系扩展,且可以形成不同型式的中继构造。正断层中继构造是在三维空间扩展的,将断层边缘的断裂力学性质和断层面的放射状扩展方向相结合,可完整描述中继构造的空间分布规律。正断层形成于伸展构造环境,是控制油气和金属矿产资源的重要构造型式,结合SEDEX型矿床同生断层和岩体侵位控制的正断层控矿研究实例,初步讨论了正断层中继构造扩展演化在SEDEX型矿床和正断层相关控矿断裂成矿构造研究中的作用。更多还原

【Abstract】 The normal fault segmentation and its propagation and evolution mechanism can be summarized as relay structure model in normal fault. In this paper, the propagation and development mechanism of normal fault relay structure are summarized from three aspects, fault block deformation, fault propagation and fracture mechanics. The relay ramp can be divided into outward-dip relay ramp and inward-dip relay ramp, and deformation of relay ramp is following the fault displacement transfer, the surveyed distance-displacement graphs reveal the deformation characteristics of relay zone. There are many ways of normal fault propagation, including tip-to-parent connection, isolated-to-isolated fault linkage and normal fault arrays propagation; and the relay structures can be formed by one or several different processes. Relay structure in normal fault developing in 3D space can fully describe the space distribution of relay structure and the fracture mechanics of fault border with radiation propagation direction of fault surface. In extension tectonic setting, the relay structure in normal fault is a significant structure form which generally controls the hydrocarbon and metallic resources. The role of the evolution of normal fault relay structure in SEDEX-type deposit and the related ore-controlling fracture was preliminarily discussed, especially in terms of metallotectonics.更多还原