藏北亭贡地区变质作用分析

Analysis of Metamorphism in Tinggong Area,Northern Tibet

本文针对藏北亭贡地区广泛分布的变质岩,对其不同类型时空分布规律、变质相特征、变质作用类型等进行研究。发现测区内变质作用及其演化是个复杂的过程,区域变质、接触变质以及动力变质等多种变质作用类型共存。重点对变质作用相互叠加关系及地质事件对变质作用的影响进行探讨,从而建立本区变质作用序列,为藏北亭贡地区基础地质研究提供进一步的资料。

In this paper, the metamorphic rocks widely distributed in the Tinggong area of northern Tibet arestudied for different types of temporal and spatial distribution, metamorphic phase characteristics andmetamorphism types. It is found that the metamorphism and its evolution in the survey area is a complex process,and various metamorphism types such as regional metamorphism, contact metamorphism and dynamicmetamorphism coexist. The focus is on the superposition of metamorphism and the influence of geological eventson metamorphism, so as to establish the metamorphism sequence in this area, and provide further information forthe basic geological research in the Tinggong area of northern Tibet.