摘要
通过对南京栖霞山大洼中二叠统栖霞组上升流沉积岩相的观察,将其划分为燧石条带、硅质岩、硅质页岩和泥晶灰岩4种上升流岩相类型;并在剖面上呈有规律组合,共有3种组合形式。该3种岩相组合均属陆棚缓坡相,按水体深度,由浅至深,依次发育,构成了研究区陆棚斜坡沉积体系。缓斜坡带以含燧石条带泥晶生屑灰岩为特征,夹有暗色中薄层石灰岩、泥岩、页岩和硅质岩。
By obeserving upwelling of sedimentary facies in Qixia formation of Middle Permian at Xixia moun- tain Dawa in NanJing, it can be divided into four kinds of upwelling facies types ,which include chert belt,siliceous rock,siliceous shale,micrite. The rock facies can combine with each other regularly and has tatal of three kinds of combination forms. Three kinds of lithofacies belong to gentle slope shelf facies. According to the water depth which is from shallow to deep and successively development, it forms the system of continental shelf facies of gentle slope in investigated area. The gentle slope in the zone is characterized by chert belt bearing-micrite with some intercala- ted rock, such as limestone and mudstone,shale and siliceous rock ,which are dark color and mediate to thin layer.
出处
《科学技术与工程》
北大核心
2014年第8期126-130,共5页
Science Technology and Engineering
关键词
中二叠统
上升流
岩相组合
the middle Permian upwelling rock facies
