华南湘桂粤地区煤中热液脉体的岩石学研究

A PETROLOGICAL STUDY ON HYDROTHERMAL VEINS IN COAL IN HUNAN-GUANGXI-GUANGDONG AREA

煤中高含脉率脉体的出现，是煤热液变质作用的重要依据之一。本文详细讨论了湘桂粤地区早奥陶世、早石炭世、晚二叠世和晚三叠世煤中热液脉体的种类、岩石学特征及其与煤变质程度的关系。无论什么时代的无烟煤，随着其变质程度升高，煤中脉体的种类增多，矿物成分变得复杂，较高温热水矿物出现。

It is an important evidence of coal hydrothermal metamorphism that hydrothermal veins with highly vein-bearing content are found in coals. Hydrothermal veins have been discussed on their types,petrological characters and the relations to coal ranks in Early Ordovician,Early Carboniferous , Upper Permian and Upper Triassic coals in Hunan-GuangxiGuangdong Area.The types of veins will increase,the mineral components will get more comPheated and higher temperature gydrothermal minerals will evolve as anthracite ranks,whenever they are,get higher.