浙西南八都群的应变特征及有限应变分析  

Strain features and finite strain analysis of badu group in the southwest Zhejiang province

作　　者：沈晓华 董士尤 

出　　处：《浙江大学学报（自然科学版）》1995年第2期250-257,共8页

摘　　要：本文对浙西南八都群的叠加褶皱，构造置换及韧性剪切带的应变特征进行了详细的构造解析，反映了八都群在主变形期以构造推覆作用，挤压变形及韧性剪切作用为主要变形方式，进而进行了有限应变分析，八都群的有限应变特征与其所具有的构造样式基本一致．文章还对八都群早期构造运动方式进行了运动学分析．The Badu Group is situated near the city of Longquan in the southweSt Zhejiang province. TheStrain feature of Badu Group metamorphic rock is the debating focus of basic geological problem ofsome times. Throughtout the area of an investigation,structural deformation is obvious and ischaracterized by well-developed superposed folds,structure transposition,and ductile shearing of therock. Stress contrast between rocks of different structural environment during major deformationPeriod led to different deformations of rooks as well as structure style variation in different straintypeS and places. During major deformation Period of Badu Group the napping,the flattening and theductile shearint are main deformation types. Strain indicators enable a better understanding of thegeometry, kinematic and amounts of ductile strain within the area,for which two methods of ductilestrain within the area,for which two methods such as Rf/ and Flinn diagram are invoked. By afinite strains analysis of Badu Group metamorphic rock,the strain features and kinematicscharacteristics during the major deformation periiod are provided.

关 键 词：有限应变分析 运动学 构造运动 褶皱运动 

分 类 号：P542.2[天文地球—构造地质学]