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通过光学显微镜和高压电子显微镜对带内的变形石英进行显微构造超微构造观测和估算变形参数(σ_1-σ_3=85.0MPa,ε_s=10~(-9)～10~(-10)/S),认为该区变质岩形成于深层环境,是长期缓慢变形的结果。变形石英位错构造为变形阶段和恢复阶段的混合体,其变形机制为塑性形变。采用石英光轴干涉图法,在偏光显微镜下对水平定向薄片进行岩组测量,绘制成该区的石英光轴方位图,探讨其构造变形的演化历史。首次划分出S(或S+S)和B+S构造岩岩组类型及Ⅰ型、Ⅳ型和Ⅴ型石英定向类型。应力场随着构造变形的演化作逆时针旋转。山南北挤压应力场逐渐变为单向推挤的应力场,从而认为构造变形是多期次的叠加。
The deformed microstructure of the deformed quartz in the band was observed and estimated by optical microscopy and high-pressure electron microscopy (σ_1 -σ_3 = 85.0MPa, ε_s = 10 -9 ~ 10 -10 / S) ), That the metamorphic rocks formed in the deep environment, is the result of long-term slow deformation. Deformation Quartz dislocation structure for the deformation phase and the recovery phase of the mixture, the deformation mechanism of plastic deformation. The quartz optical axis interferogram method was used to measure the rock orientation of the horizontally oriented sheet under a polarizing microscope and the azimuth of quartz optical axis in the area was plotted to discuss the evolution history of the tectonic deformation. For the first time, the types of S (or S + S) and B + S tectonic rocks and the types I, IV, and V of quartz were classified. The stress field rotates anticlockwise as the tectonic deformation evolves. The compressive stress field in the north and south of the mountain gradually becomes the stress field of unidirectional pushing, so that the tectonic deformation is multi-period superposition.