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本文根据镜下有限应变测量成果,经富林图解分析后提出:工作区韧性断层的形成,并非是单一的简单剪切变形机制,而是区域压扁加剪切应力背景下的产物。经构造岩薄片统计后得出:从韧性断层带边缘到中心,石英的塑性变形特征由波形消光→变形条带→变形纹→锯齿状边→多边形化→亚晶→重结晶的序列变化,是与宏观变形特征对应的,都反映变形由弱至强的规律变化。文章还定量计算了该区韧性断层形成的应力值为23—34×10~6Pa,并指出工作区古增温方向由东向西。
Based on the results of finite strain measurement under microscopy, the results of the Fulin diagram analysis show that the formation of the ductile fault in the working area is not a simple simple shear deformation mechanism, but a product of the regional crusting and shear stress. The statistics of tectonic rocks shows that the sequence of the plastic deformation of quartz from extinction of waveform to deformable strip to deform pattern to jagged edge to polygonization to subgrain to recrystallization from the edge of ductile fault zone to the center is Corresponding to the characteristics of macroscopic deformation, all reflect the law of deformation from weak to strong. The article also quantitatively calculates the stress value of ductile fault formation in this area is 23-34 × 10 ~ 6Pa, and points out that the ancient warming direction of the working area is from east to west.