华北聚煤区火山灰蚀变粘土岩夹矸的研究

Study of synsedimentary volcanic-ash-derived clayrock bands in Carboniferous-permian coal-bearing formation of north China

本文论述了火山灰蚀变粘土岩夹矸的层位和分布，对结构构造作了系统分类及命名。首次在我国粘土岩夹矸中发现了较广泛分布的铵云母，还有伊利石和钠云母。

The horizon and distribution of the clavrock bands(tonsteins)of the synsedimen-tarh volcanic ash fall origen are described on the basis of regional geological surveying andoffice analysis.The textual types of the bands are systematically differentiated and named. The clayrocks are mainly made up of kaolinetes and kaolinete-dickites,I/S minerals are sec-ondary,tobelite is first discovered and more extensivey distributed in the clavrock bands ofnorth China and there are yet illite and pargonite. The researches made on the typomorphiccharacteristics of quatz,feldspar,zircon and apatite and so on supply the reliable evidencesto the resumption of the orignal materials. The geochmical properties suggest that they areintermediate-acid ashs.