构造岩中变形机制与变形结构

DEFORMATION MECHANISMS AND TEXTURES IN TECTONITES

构造岩中的变形机制有三种类型：物质扩散迁移、晶体塑性变形和粒间摩擦滑移作用和破裂作用。它们形成的变形结构有：磨蚀边结构、山羊须结构、雪球结构、显微石香肠、残斑旋转、压力影、分结条带、拨丝结构、变形纹，变形条带、机械双晶、显微膝折、亚晶粒、核幔结构、剪切阶步、云母鱼和矩形边等。它们对研究变形作用与变质作用的关系，对揭示构造变形的演化历史和确定变形环境具有重要意义。

There are three types of deformation mechanisms in tectonites-mass diffusion andtransmission,crystal plastic deformation and intergranular friction g116ing andcracking。These个formation mechanisms can form a variety of deformation textures,i.e.Plucked-boundary,Goatee,Snow-ball,Micro-boudinage,Rotational porphyroclasts,Pressure shadow,Segregation banding,Filiform,Deformational vein,Deformational band,Mechanic twin,Mi-crokink,Subgrain,Core-mantle,Shear step,Mica fish and Rectangular band etc..Thesedeformation textures are of special important for studying the relationship between deforma-tion and metamorphism, for bringing to light the history of deformation and for determiningenvironment of deformation.