摘要
青石垭组风暴岩沉积序列与R.D.Kreisa等建立的理想沉积序列很相似,由下到上出现侵蚀突变的底面、贝壳滞积层和粒序层、纹理层(包括平行纹理、沙纹交错层理、浪成上叠沙纹层理、丘状交错层理及包卷层理等)和板岩层,并可分为近源和远源两种风暴岩,其中以后者为主。青石垭组风暴岩形成于扬子板块北侧相对稳定的古被动大陆边缘之上。
The sectional sequence of the tempestites in the Qingshiya formation is very similar to the R.D.Kreisa's model of the storm sedimentary sequence.In the ascending order, it can be divided into three members: A.mussel bed and graded bed; B.lamination; C.slate.The tempestites of this region can be divided into twe kinds. They are the proximal and distal tempestites.The latter is the main kind.The sediments of the Devonian in the south of the Shanyang--Fengxian fault, and the tempestites in the Qingshiya Formation all belong to the northern ancient passive continental margin of the Yangtse plate.
基金
国家自然科学基金资助项目
关键词
风暴岩
形成
构造背景
青石垭组
Tempestite, Tectonic setting, Qingshiya Formation
