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岩石组构是指组成岩石的矿物在岩石中分布的各向异性 ,X光岩组分析就是运用 X光衍射技术测定岩石结构要素——岩石中矿物分布的规律性。通过对北京崎峰茶金矿区含矿韧性—韧脆性变形岩石的 X光岩组分析 ,认为该区岩石变形比较明显 ,石英变形机制是以中低温底面或近底面滑移为特征 ,而作为斜长角闪质岩石和长英质岩石的退变质矿物绿泥石和绢云母等片状矿物则平行变形面理定向排列。从岩石组构特点结合宏观构造分析可以推断 ,该区属于中浅层次 (深度为 8～ 10 km,温度为 30 0～40 0°C,围压为 0 .2 0～ 0 .2 5 GPa)的韧脆性变形 ,变形运动学和动力学特征是近南北向断裂为正断右行、近东西向断裂为正断左行 ,最大拉应力 (σ3)为北西—南东向 ,与该区处于云蒙山变质核杂岩北西侧外围的构造部位相吻合。
Rock texture refers to the anisotropy of the rocks that make up the rock. X-ray rock group analysis is the use of X-ray diffraction to determine the regularity of the mineral composition in rocks. Based on the X-ray lithofacies analysis of the ore-bearing ductile-ductile-brittle deformed rocks in the Qifengcha gold-gold mining area in Beijing, it is considered that the deformation of the rock is quite obvious. The deformation mechanism of the quartz is characterized by slipping at the bottom or near bottom of mid-low temperature, Plagioclase amphibolite and feldspathic rocks of degenerated minerals such as chlorite and sericite flake minerals are oriented parallel to the deformation of texture orientation. According to the characteristics of rock structure combined with macro-structure analysis, it can be inferred that the area belongs to medium-shallow level (depth of 8 ~ 10 km, temperature of 30 0 ~ 40 0 ° C, confining pressure of 0 0 ~ 0 25 GPa ), The deformation kinematics and dynamics are characterized by near-north-north fault normal fault and right fault, near east-west fault is normal fault left fault, and maximum tensile stress (σ3) is northwest-south east, The tectonic parts that lie in the outer periphery of northwest side of the Yunmengshan metamorphic core complex are consistent.