泌阳凹陷东南缘下第三系杂砾岩的沉积学特征

摘要：本文首次对区内杂砾岩（又称红层）的沉积学特征进行研究。据成因之不同，把杂砾岩区分为６类：泥石流、颗粒流、泥流、冲刷砾石层、河道及片流沉积。讨论了各类沉积之特点，尤其是砾石的粒度分布特征。结果表明，不同成因的杂砾岩砾石的粒度分布曲线形态，尤其是量化粒度参数存在明显差异。

SEDIMENTOLOGY OF DIAMICTITES OF LOWER TERTIARY IN SOUTHEASTERN BIYANG DEPRESSION,HENAN PROVINCE

he sedimentary characteristics of diamictites(so-called red beds) in the study area are fully studied for the first time.According to different origin, six genetic types of diamictites may be distinguished:debris flow deposits, grain flow deposits, mud-flow deposits, washed gravel layers,channel and sheetflood flow deposits. The sedimentary characteristics of all sorts of diamictites, especially grain-size distribution characteristics of clasts are mainly disscussed. The result indicates that the shapes of grain-size distribution curves of clasts in different genetic diamictites and quantitative grain-size parameter Mdf/Rgs are entirelly different from one to another.