关于茶棚石炭系本溪组红色粘土岩的研究

红色粘土岩产于焦作地区茶棚附近的石炭系本溪组内,厚度7～8m,分布面积大约1km~2。从下向上红色粘土岩的颜色由浅紫红色到浅黄褐色。下部浅紫红色者、页理发育、呈薄片状;上部浅黄褐色者页理不发育,贝壳状断口:粘土结构,主要由粘土矿物组成。红色粘土岩经镜下鉴定、差热分析,X—射线衍射分析,扫描电镜分析,它的主要矿物成份为叶腊石、高岭石、伊利石,还有少量的一水硬铝石、绿泥石、褐铁矿等,而且褐铁矿在红色粘土岩中分布比较均匀。该红色粘土岩灼烧后呈暗紫红色、无裂隙,是制作彩色陶瓷的好材料。

A PRELIMINARY STUDY OF THE RED CLAY BED IN CHAPENG OF JIAOZUO CITY,WEST HENAN

In this paper the author describes the methods Used in de termining the mineral ingredients in the red clay bed of middle carboniferous period in Chapeng near Jiaozuo city,Henan and sug- gests its sedimentary origine for the first time.The object is to provide a new source of non—metallic building material. The red clay rocks are determined by polarimetric microscopy, differential thermol analysis and X—ray powder diffraction.The chief ingrediants are pyrophyllite,kiolinite,illite and a small quantity of diaspore,chlorite and limonite which distributed un iformly in even size grains.Under burning its colour changes from light yellow to deep red and presents medium plasticity. The red clay deposit is thickly beded with simple structure and ample resources so to afford cheap mining cost.As the mar ket requirement of coloured building materials is going high,the red clay may be served as a good dyestaff for high grade porce lain.