西藏吉隆—康马变质带地质特征初探  

A TENTATIVE PROBE INTO THE GEOLOGICAL FEATURE OF JILONG-KANGMA METAMORPHIC ZONE,TIBET

作　　者：李朝辉[1] 毛晓冬[1] 刘志鹏[1] 

机构地区：[1]成都理工大学地球科学院,四川成都610059

出　　处：《云南地质》2015年第3期346-351,共6页Yunnan Geology

摘　　要：西藏吉隆—康马变质带主要由串珠状分布的变质核杂岩穹窿体组成,其由内至外依次为内核滑脱层及盖层。内核,形成于地壳较深部位或下部构造层次,变质程度为低角闪岩相—高角闪岩相。滑脱层自内至外具糜棱岩—碎裂岩的过渡分带,为高绿片岩相—低角闪岩相。盖层形成于上部构造层次;其紧邻穹隆体的古生界变质较强,为低绿片岩相—高绿片岩相;外围中新生界变质较浅或未变质。Jilong-Kangma metamorphic zone in Tibet mainly consists of metamorphic complex dome cores like lement bed with the transitional zonation of mylonite-cataclastite outwards from inner is metamorphosed to high greenschist facies-low amphibolitic facies. The cover rock is formed in the upper level. The Palaeozoic part close to the dome is metamorphosed intensely, to low-high greenschist facies, whereas the outer Mesozoic-Cenozoic part metamorphosed light even without metamorphism.

关 键 词：变质核杂岩 变质带划分 构造层次 西藏吉隆—康马 

分 类 号：P588.3[天文地球—岩石学]