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构造岩的构造和组构是变形运动亦即岩石流动的直接记录。作者对滇西羊拉铜矿区的石英构造岩进行了微观分析,认为矿区内的南北向、北西向构造活动较强,北东向构造活动近岩体增强,北西西向构造活动在矿区北部有较强的显示。动力学分析表明,矿区最大主应力方向晚期为北西—南东向和北东向,东西向主压应力断续作用,导致岩石的脆性和韧性变形,石英光轴优选方位形式及弗林指数k值的测算均说明变形方式以压扁为主。
The structure and structure of tectonic rocks are the direct records of deformation movements, ie rock flows. Based on the microscopic analysis of the quartz tectonic rocks in the Yangla copper deposit in western Yunnan, the author thinks that the north-south and northwest tectonism in the mining area is strong, the tectonic activity in the NE direction is enhanced, and that in the north part of the mining area Strong display. Kinetic analysis shows that the direction of maximum principal stress in the mining area is intermittent in the northwest-south east and northeast, east-west main compressive stress, resulting in brittle and ductile deformation of rock, the preferred orientation of quartz optical axis and the Flynn index k The calculation of the value indicates that the deformation mode is mainly squashed.