煤层中粘土岩类夹矸的结构

作者根据对我国主要含煤地层500余件煤层夹矸标本和薄片的观察研究,较系统地提出了煤层中粘土岩类夹矸的结构分类和命名。主要依据煤层夹矸中粘土矿物的形态、大小和混入物的成分,将粘土岩类夹矸的宏观和中观结构划分为六大类,30余种结构类型,其中数种是作者新提出的。这一分类不仅丰富了粘土岩类的结构类型,而且也为煤田地质工作者提供了一种认识手段。煤层中粘土岩类夹矸的结构是地质历史的产物,反映了物源、沉积环境和成岩后生作用的特点,因而地质成因是结构研究的基础。依据煤层夹矸中粘土矿物的形态、产状、石英,长石、锆石等矿物、火山玻璃碎屑的组合和标型特征以及地球化学特征的综合分析,简要论述了各种结构类型的成因,试图通过结构—成因的分析方法,为恢复地质历史提供有价值的资料。

THE TEXTURE OF CLAY ROCKS BAND IN COALBED

Authors have more genealogically posed the classification and naming on the texture of clay rocks band in coalbed,based on observation study to five hundred pieces of samples and thin sections from main coal-bearing strata in our country.The macrotexture and mediotexture of clay rocks band are divided into six main categories,more thah thirty species of texture,types,mainly based on the morphological,properties,sizes of clay minerals and compositions of mingled materials in coalbed,many species of them is named by authors.This classification not only richens the texture types of the clay rocks,but also provides an understanding means for coal field geologists.The texture of clay rocks band in coalbed is a product of geological history.It reflects the material origins,sedi- mentary environments,properties of diagenetic and deuterogenic process, thus,the geological genesis is a basis texture study.According to the morphological properties and guide properties and occurrences of clay minerals,the assemblages and guide properties of puartz,feldspar,zircon and shard and the general analysis of geochemical properties,authors have summarily discussed the geneses of texture types to make an attempt with analyzing method of texture-genesis to provide valuable data for resuing geological history.