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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 authors systematically proposed the structural classification and naming of the clay rock maggots in the coal seam based on the observation and study of the specimens and lamellas of more than 500 coal seams in China’s main coal-bearing strata. Based on the shape, size and composition of clay minerals in the clay layer of the coal seam, the macroscopic and mesoscopic structures of the clay rocks are divided into six categories and more than 30 types of structures, several of which are newly proposed by the author. . This classification not only enriched the structural types of clay rocks, but also provided a means of understanding for coal field geologists. The structure of the clay rocks in the coal seam is a product of geological history and reflects the characteristics of source, depositional environment, and diagenesis epigenetic effects. Therefore, the geological origin is the basis of structural research. Based on the analysis of clay minerals in coal seams, their morphology, occurrence, the combination of quartz, feldspar, zircon and other minerals, volcanic glass fragments, typomorphic features, and geochemical characteristics, the causes of various structural types were briefly discussed. It tries to provide valuable information for the restoration of geological history through structure-cause analysis methods.