摘要
位于中扬子地台东南缘的大沙坪剖面下奥陶统留咀桥组下段重力流沉积非常发育，重力流沉积类型以富基质的Ａ型碎屑流沉积为主。经区域资料横向对比，这种发育是局部性的。对这种局部性的重力流沉积，本文应用自发振动原理进行了阐述，分析了沉积迁移常数Ｋ、沉积物滑移的最大坡度角αｍａｘ、最小坡度角αｍｉｎ、沉积物输入速率η等参数。αｍａｘ、αｍｉｎ控制了一个自发振动系统，△α（αｍａｘ－αｍｉｎ）、Ｋ。
Gravity flow sediment is well developed in lower member of Liuzuiqiao group of lower Ordivician which lies in Dashaping section of south eastern margin of Yangtze Platform. Regional lateral contrast shows that the development is locally distributed.The gravity flow sediment majors in type A rich matrix debris flow.Based on the self vibration principle, the paper has made some interpretation of local gravity flow sediment, and some analysis of parameters such as constant K of sediment migration, rate η of sediment input,maximum slope angle α max and minimum slope angle α min of sediment slope.Accordingly, a conclusion can be made as follows: a) The self vibration system is controlled by α max and α min ; b)The cycle of gravity flow is controlled by △ α ( α max - α min )、 K 、 η .
出处
《岩石学报》
SCIE
EI
CAS
CSCD
北大核心
1997年第2期245-253,共9页
Acta Petrologica Sinica
关键词
碳酸盐
矿物
重力流
振动
成因机理
Gravity flow
Type A of debris flow
Self vibration system
Constant of sediment migraiton
Sslope angle
