重庆北碚鹰耳岩节理的构造特征解析

Related Issues on Joints of Ying’eryan in Beibei,Chongqing Province

基于对重庆北碚鹰耳岩节理的研究,建立该地区节理的认识和理解;对该地区的节理特征进行描述。运用构造解析方法,遵循共轭节理配套原则对重庆北碚鹰耳岩地区发育的次生节理进行分析,该区共发育5套共轭节理,分别是北东向和北西向节理、近南北向和近东西向节理、北北东向和南西西向的平面共轭节理。北东向和南西向节理、北西向和南东向的剖面共轭节理,分属为南北向、北东向、北西向3个构造期次。结合地质背景,推出该区节理的形成和发育受到南北向、北东向、北西向构造应力场的作用。

The research on the joints of Ying’eryan in Beibei,Chongqing province,was applied to set up the comprehension and understanding of the joints in this area.Besides,the characteristics of the joints were described.The principle of determination of conjugate joints and the method of structural analysis were applied to the study of secondary joints developed in Ying’eryan area.Five sets of conjugate joints,composed of plane conjugate joints of northeast and northwest striking,north-south and east-west striking,north northeast and southwest west striking,and of profile conjugate joints of northeast and southwest striking,northwest and southeast striking,were determined and analyzed.The formation and development of the secondary joints in the area were affected by 3 structural stress fields of north-south structure,northeast structure and northwest structure.