摘要
众所周知,碳酸盐质碎屑流是一种含有大量粗碎屑物的重力流。其物质来源于碳酸盐台地,沉积岩石表现为无分选,不具层理的特征。甘肃龙首山地区广布的一套砾状白云岩,作者认为是碎屑流成因的岩石,其碳酸盐质碎屑流形成于震旦纪早期,是华北地台西南缘大陆边缘裂谷的产物。沉积于裂谷盆地。从侧面反映了龙首山地区震旦纪早期非稳定的区域构造演化背景。
It is common knowledge that the carbonate fragmental flow is one of the gravity flow, which contains a number of coarse fragmental materials. Its material are provided by the carbonate platform. Its sedimentary rocks show a character that is unsorted and unstratified.In Gansu Longshou mountain where distributes a lot of rudace-ous dolostones, the writer realizes that it is formed by fragmental flow.This carbonate fragmental flow is created for the evolution of collapsing accumulation materials inlongshou mountain, which is the products of continental rift for the southwestern edge of North China platform in Early Sinian period. Then, it deposes in the rift basin. The purpose of this report is to emphasize the geolo-gical significance of the carbonate fragmental flow deposition in a continental rift, but to require further study.
出处
《甘肃地质》
1991年第12期81-88,共8页
Gansu Geology
