摘要
通过对中上扬子地区五峰期海平面变化、沉积特征、生态特征和沉积速率等的分析，认为五峰组页岩段形成于海平面上升时期，属深海沉积。首次提出观音桥段形成于深海环境中，并属深海等深流沉积。并识别出三种等深岩相类型，即砂质等深岩相、泥质等深岩相和生物局等深岩相，它们均呈巨型条带状分布于中上扬子地区。
Based on the sea level change,sedimentary and ecologic features and sedimentary rate of the Wufeng Formation,it is believed that the Shale Memberof the Wufeng Formation is deep-sea sediments which were formed in rising period of sea level. This paper puts forward that the Guanyingqiao Member of the Wufeng Formation is deep-sea contourite sediments.Finally, three types of contourites factes i. e. sandy, muddy and bioclastic contourites factes are recognized. They occur in the form of gigantic belts within mid-upper Yangtze Area.
出处
《四川地质学报》
1996年第4期294-298,共5页
Acta Geologica Sichuan
关键词
海平面变化
沉积速率
深海环境
五峰组
sea level change
sedimentary rate
deep-sea environment
Wufeng Formation
