歪石砬子变粒岩构造演化序列  

THE TECTONIC EVOLUTIONARY SERIES OF WAISHILAZI METACONGLOMERATE

作　　者：纪春华[1] 

机构地区：[1]吉林地勘局区域地质矿产调查所

出　　处：《吉林地质》1998年第4期45-48,共4页Jilin Geology

摘　　要：歪石砬子变粒岩为早元古代变质岩，因经历了多期变形的叠加与改造，岩石构造非常复杂。可划分为四期变形，由区域变质变形、层间韧性剪切带、开阔褶皱和单向膝折带组成构造演化序列。前两期变形属中浅部构造层次变形，后两期变形属表浅部构造层次变形；构造应力场由近南北向挤压转为近东西向挤压。The Waishilazi metaconglomerate is early Proterozoic metamorphic rock,because of the super-position and transformation as the multiple phases of deformation,rock structures are very complicated;it could be divided into 4 stage deformations,the tectonic evolutionary series was formed by the regional geologic deformation,interlayer ductile shear belt,broad fold and unilateral kink band.Two former deformations belong to mid-shallow structural deformation,and the later ones belong to surface-shallow structural deformation;the compression deformation of tectonic stress field is from NS to nearly WE trending.

关 键 词：歪石砬子变粒岩 构造演化序列 构造层次 变质岩 

分 类 号：P588.3[天文地球—岩石学]