Microstructures of co-axially folded vein segments and crenulation cleavage： Evidence for dissolution phenomena in the Chamba Thrust Sheet, western Himalayas

作     者：B.K.Sharma A.M.Bhola 

作者机构：DepartmentofGeologyUniversityofDelhiDelhi-110007India. 

出 版 物：《Episodes》 (地质幕（英文版）)

年 卷 期：2004年第27卷第2期

页      面：119-124页

核心收录：

学科分类：0709[理学-地质学] 07[理学] 070901[理学-矿物学、岩石学、矿床学] 0708[理学-地球物理学] 0704[理学-天文学] 

主　　题：显微结构 变质沉积物 地质学 石英纹理 

摘      要：The metasediments in the Chamba region experienced three phases of deformation: DF1, DF2 and DF3.Folded quartz veins are co-folded with the F2 crenulation folds. Their geometric and tectonic significance is studied by microstructures and shortening adjacent to the discrete crenulation cleavage, S2. Microstructures of folded vein segments, their geometric changes and truncation to cleavage (S2) are mainly due to pressure-solution phenomena and the estimated volume loss from reconstructed vein segments range from 16 to 25.5%,which is closely related to volume decrease (26%) calculated from the polydeformed slates of North Wales areas.