论文部分内容阅读
边界断裂控制断陷盆地的形成和构造格局,不同边界断裂联接模式对不同类型盆地演化具有差异性.基于井控高精度3D地震资料,通过对边界断裂几何学特征描述和“四级小层”刻画,结合裂陷I幕边界断裂不同区段的活动差异性以及与沉积中心迁移的空间匹配关系,剖析珠江口盆地惠州凹陷北部边界断裂的形成和演化.惠州凹陷北部边界断裂始新世早期分段孤立发育,逐渐以纵向和横向双向联接的模式发展.纵向联接为断层软联接和硬联接复合联接和转换,形成转换斜坡和横向背斜,控制凹(洼)陷的结构与演化,制约沉积中心及层序的迁移.横向联接表现为转换斜坡内横向断层的多阶段联接,联接过程可划分为孤立正断层、同向叠置及硬联接3个阶段,控制转换斜坡带内沉积体系的发育和展布.研究给出了一个裂陷盆地边界断裂时空演化、复合联接和转换模式的独特案例,对丰富裂陷盆地边界断裂及其与沉积层序、凹陷演化和区域动力学机制的响应关系的研究具有积极的意义和价值.
Boundary fault control faulted basin formation and tectonic pattern, different boundary faulting modes have different evolvement on different types of basins.Based on high precision 3D seismic data of well control, through the analysis of boundary fault geometry and “ ”, Combined with the spatial variability of activities in different sections of the boundary rupture of rift I and its spatial distribution with the depositional center, analyzed the formation and evolution of the boundary faults in the northern Huizhou Sag of the Pearl River Mouth Basin. Early stages developed in isolation and gradually developed in both vertical and horizontal directions. Longitudinal joints are composite joints and transitions between soft and hard faults, which form transition slopes and lateral anticlines and control the structure and evolution of the depression. Which restricts the migration of sedimentary centers and sequences.Transverse jointing is manifested as multi-stage jointing of transversal faults in conversion ramp. The jointing process can be divided into three stages: isolated normal fault, same direction stacking and hard jointing, The paper presents a unique case of a spatiotemporal evolution of boundary faults in a rifted basin, a composite join and a transformation model, Boundary fracture and the rift basin rich sedimentary sequence, Response Relationship recessed region kinetic mechanism of evolution and has positive significance and value.