罗城煤田早石炭世热液变质煤的地球化学研究

A Geochemical Study on Hydrothermal Matamorphic Coals of Early Carboniferous Epoch in Luocheng Coalfield

关键词:  热液变质煤  地球化学  化学结构  广西

Key words:  Hydrothermal metamorphic coal  geochemistry  chemical construction  Guangxi

摘要:

热液变质煤与其围岩相比,具有高得多的含脉率。古植物生长具"喜基性成分"的特征。随生物地球化学作用增强,大多数微量金属元素含量升高。随煤变质程度升高,|δ¹³c|、(002)和(10l)X射线衍射峰的半高宽、红外光谱吸收峰和喇曼光谱散射峰的数目降低,活泼元素的含量、煤结构单元的L_c值和L_a值增大。

Abstract:

The vein-bearing content of hydrothermal metamorphic coal is much greater than that of its wall rock. Paleo-plants possess characteristic of "basicphilic" compone during their growth. The contents of most trace metal elements in coals, such as rare-earth element, indium, copper, molybdenum and nickel,will increase with biogeochemical processes. As the rank of metamorphosed coal is high, the absolute value of σ¹³c, the widths of halfheight of (002) and (10l) X-ray diffraction peaks, the numbers of ultrared spectral absorption peak and Raman spectral scattered peak will decrease, and the content of active elements, L_a and L_o of coal texture units will increase.