西藏东部南迦巴瓦地区变质作用特征  

CHARACTERISTICS OF THE METAMORPHISM IN NANJIABAWA REGION,TIBET

作　　者：王天武[1] 马瑞[1] 

机构地区：[1]长春地质学院地球科学系

出　　处：《长春地质学院学报》1996年第2期152-158,共7页

摘　　要：西藏东部的南迦巴瓦地区包括喜马拉雅地体、中缅地块和印度河－雅鲁藏布江缝合带的一部分。根据区内构造特点、变质岩共生组合、时空分布、矿物共生组合及其反应关系的研究，揭示了本区变质作用特征。南迦巴瓦群发育了一套较完整的递增变质带，经历了先升压后升温的演化过程；雅鲁藏布江变质岩带经历了一次高压低温变质作用；帕隆群变质作用为一个先升温后升压，温压同时达到高峰的演化过程。Nanjiabawa region includes Ximalaya terrain, Zhong-Mian block and a part of Yaluzangbujiang suture belt.The study is about the characteristics of structure,assemblage of metamorphic rocks and relationship among distribution,assemblage and reaction of minerals.There is a perfpct progressive metamorphic belt in Nanjiabawa group which indicates an evolution pattern characterized by a trend of increasing pressure followed by increasing temperature. The Yaluzangbu metamorphic belt indicates high pressure and low temperature metamorphism,The Palong group exhibits an evolution pattern of increasing temperature followed by lately rising pressure with both temperature and pressure reaching their peaks at some time.

关 键 词：变质作用 南迦巴瓦地区 西藏 变质岩 

分 类 号：P588.3[天文地球—岩石学]