【摘要】 花岗岩是大陆地壳的重要组成部分 ,是地球动力学演化的示踪剂。花岗岩体侵位构造的研究对于揭示花岗岩体的变形历史和侵位机制具有重要的科学价值。本文研究了海洋山花岗岩体的内部构造、与岩浆侵位应力有关的围岩构造及热接触变质带特征 ,探讨了岩体和围岩的应变状态。研究发现 ,从岩浆侵位到冷凝固结 ,海洋山花岗岩体经历了液态流动、塑性变形和“半固态”冷凝阶段的演化。岩体各单元的应变类型分别是单轴压扁、平面应变、单轴压缩 ,早期单元的平面应变大于晚期单元的平面应变。围岩奥陶系遭受了一定的变形和变质作用 ,靠近岩体的围岩发育边缘向斜和裂隙构造 ;从靠近岩体到远离岩体 ,岩体与围岩的热接触变质带依次可分为红柱石带、黑云母带、绿泥石带。本文认为 ,海洋山花岗岩体具有低的应变结构 ,它是岩浆在区域应力和浮力的联合作用下主动侵位的结果更多还原

【Abstract】 Granitoids are the main component of the continental crust and the tracers of geodynamic evolution. The research for granitic structure that related to emplacement has significance for the deformation history and the emplacement mechanism of granite plutons. The internal structure of Haiyangshan granite plutons, wall rock structure related to emplacement, the thermal contact metamorphic aureole, and the state of strain of the granite plutons and its wall rock studies are carried out. The research indicates that Haiyangshan granite plutons have experienced a series of evolution from liquid to solid state. The rock has low strain fabric. The strain of the earlier unit is bigger than that of the later,the strain of the fringe is bigger than that of the middle part in the same unit. Its wall rock has lower deformation and metamorphism. The metamorphism is mainly of abbiteepidate amphibolite facies. The expansive force resulted from the emplacement of the granite made fringesyncline appearance and thermal metamorphic mineral growth in thermal contact metamorphism aureole. The authors suggest that all structure traces indicate that Haiyangshan granite pluton was an active emplacement mechanism dominated by simultaneous tectonic dome and shared with balloon expansion to some extent.更多还原