沱沱河地区宁多岩群变质岩的特征及意义  

Characteristics and Significance of Metamorphic Rock of Ningdou Rock Group in Tuo-tuo River Area

作　　者：杨超[1] 

机构地区：[1]四川省核工业地质局二八二大队,四川德阳618000

出　　处：《资源环境与工程》2015年第2期146-149,共4页Resources Environment & Engineering

摘　　要：宁多岩群变质岩主要以区域变质岩为主,包括有区域动力热流变质作用形成的低绿片岩相、高绿片岩相和低角闪岩相变质岩系。动力变质岩仅在宁多岩群边界断裂分布,它们多数经韧性变形改造形成糜棱岩,部分岩石后又经脆性变形产生碎裂。通过对本区变质岩的变质、变形特征及叠加关系研究,确定了本区变质岩至少经历了四期变质变形作用。Metamorphic rock in Ningduo rock group consists mainly of regional metamorphic rocks which include low and high green schist facie metamorphic rocks and low amphibolites facie metamorphic rock series due to regional dynamo thermal metamorphism. Dynamic metamorphic rocks only distribute on edge fracture of Ninduo rock group. Most of them become mylonite after ductile deformation,the others break into pieces with brittle deformation. After researching the metamorphism and deformation characteristics of the rocks and relative effect of the characteristics,it can be sure that the rocks of the research area have at least going through four phase of metamorphism deformation.

关 键 词：区域变质岩 动力变质岩 变质相 变质变形 

分 类 号：P588.3[天文地球—岩石学]