西藏晚二叠世妥坝地区煤变质作用研究  

Anlyse the Coal metamorphism of Toba Field in Late Permian of Tibet

作　　者：刘成[1] 卿德林[1] 毛晓冬[2] 

机构地区：[1]成都理工大学工程技术学院资源勘查与土木工程系,四川乐山614000 [2]成都理工大学地球科学学院,四川成都610059

出　　处：《四川有色金属》2017年第1期44-46,50,共4页Sichuan Nonferrous Metals

摘　　要：西藏蕴藏着丰富的矿产资源,是研究地球形成与演化的重要场所,本文在了解西藏区域煤系特征的基础上,系统搜集整理各种地质资料和研究成果,对西藏晚二叠世妥坝煤系特征与煤变质作用进行了初步分析,妥坝含煤岩系为上二叠统妥坝煤系,煤层属极不稳定煤层,煤岩以亮煤、镜煤为主属光亮~半亮型,通过分析煤系含煤性变化,可以得出含煤性与煤系地层中粉砂岩含量成正性相关关系,区内煤变质作用主要以深成变质为主,其次为动力变质和岩浆热变质作用。Tibet is rich in mineral resources, is the important place to study formation and evolution of the earth,based on the understanding of Tibet regional coal characteristics on the basis of the system to collect all kinds of geological data and research results, characteristics of Tibet completed dam of late Permian coal measures and coal metamorphism has carried on the preliminary analysis, completed the Toba on the coal-bearing rock series of Permian series Toba coal measures, coal seam belongs to the unstable coal seam, coal and rock is given priority to with light coal, vitrinite is shining - half light type, by analyzing the coal coal bearing sex change, can draw with siltstone content in coal and coal measures strata into positive correlation, the coal metamorphism in the area are mainly composed of plutonic metamorphism, followed by dynamic metamorphism and magmatic thermal metamorphism.

关 键 词：西藏 妥坝煤系 煤质特征 煤变质作用 

分 类 号：P618[天文地球—矿床学]