论文部分内容阅读
达肯大坂岩群是欧龙布鲁克地块结晶基底的重要组成部分,在形成过程中保存了丰富的物质记录和演化信息,是研究欧龙布鲁克地块乃至我国西部古老地壳及构造演化的窗口。通过对达肯大坂岩群详细的物质组成及构造剖面研究,根据岩石组合及变质-变形特征,将其进一步细化为混合片麻岩岩段、(混合岩化)流变片麻岩岩段、条带状片麻岩岩段、片岩岩段和大理岩岩段;野外调查表明,达肯大坂岩群中发育多期构造变形作用,根据野外变形特征及各期变形的叠加改造关系,初步建立了达肯大坂岩群相对变形序列,为区域构造过程的探讨与对比提供了新的基础资料。
The Darcan Daban Rock Group is an important part of the crystalline basement of the Oulongbuluke massif and has abundant material records and evolutionary information during its formation. It is a window for studying the ancient crustal and tectonic evolution in the Oulongbuluke Block and even in western China. Based on the detailed study on the composition and tectonic section of the Dakan rock group in Dakan, it is further refined into the mixed gneiss rock and the (mixed rock) rheological gneiss rock according to the rock assemblage and metamorphism and deformation characteristics. , Gneissic gneissic rocks, schist rocks and dykes; the field investigation shows that multi-period tectonic deformation is developed in the Dakan-Daban rock group. According to the field deformation characteristics and the superposition and remodeling relationship of each stage of deformation, The relative deformation sequence of Dakan Daban rock group was established, which provided new basic data for the exploration and comparison of regional tectonic processes.