摘要
本文以沉积学的方法,对武都晚更新世泥石流堆积体的地层剖面进行了划分对比,并建立了该期泥石流堆积体的综合地质柱状图,并较详细地研究了它们的沉积相特征。认为武都本期泥石流堆积体,是由与泥石流作用有关的泥流型洪积相、水流型洪积相以及与泥石流作用无关的冲积沉积相和黄土状土沉积相所组成。由此推断了它们的形成环境,探讨了泥石流发生、停歇与新构造作用及气候的关系,从而进一步划分了本次泥石流作用期的4次作用阶段。
By stratigraphic means, the paper makes division and comparison tothe geological sections from sedimentary bodies of debris flow in thelate pleistocene in Wudu, establishing synthetic geological columna sec-tions of the debris flow of this period,it also analyses the characteristicsof sedimentary facies in detail. The sedimentary bodies of debris flow inthe period are composed of mud flow facies, sheet flow facies, whichbear relationship on the action of debris flow, and alluvial facies andloess soil facies which have nothing to do with the action of the debrisflow.From this the paper deduces the forming environment of them, ex-plores the relationship among the occurence, ceasing, new tectonism andclimate of the debris flow, and then the action period of debris flow isdivided into four action phases.
出处
《水土保持通报》
CSCD
北大核心
1989年第6期36-44,共9页
Bulletin of Soil and Water Conservation
