摘要
松滋刘家场地区下奥陶统包括南津关组、分乡组和红花园组,其岩性主要由砂屑灰岩、生物屑灰岩、泥晶灰岩、页岩和礁灰岩组成。根据岩性及其组合特征,将含礁地层划分为流水成因的颗粒岩岩相、复成因的泥晶灰岩岩相、生物成因的礁灰岩岩相、生物化学成因的叠层石灰岩岩相和复合成因的粉晶白云岩和页岩岩相5大类型,共计15小种。它们构成了局限台地相、开阔台地相和台地生物礁相共3种岩相组合,并由下而上有规律地形成碳酸盐台地相序列。
Lower Ordovician strata in Songzi Liujiachang Area included Nanjinguan Formation,Fenxiang Formation and Honghuayuan Formation.The main lithology was composed of calcarenite,biological crumbs limestone,micritic limestone,shale and reef limestone.According to the characteristics of lithologies and rock associations,early Ordovician reef-bearing strata could be classified into 5 lithofacies including water current genetic grain-stone,polygenetic micritic limestone,biogenic reef limestone,biochemical genetic stromatolithic limestone polygenetic crystal powder dolostone and shale and 15 lithofacies.These lithofacies are made up of three kinds lithofacies associations,such as restricted platform,open platform and platform reef,which regularly form a kind of major lithofacies sequence from the bottom to top.that is the carbonate platform lithofacies sequences.
出处
《石油天然气学报》
CAS
CSCD
北大核心
2011年第11期19-23,29,共6页
Journal of Oil and Gas Technology
基金
荆州市科技发展项目(20101P031-5)
关键词
生物礁
岩相
岩相组合
下奥陶统
reef
lithofacies
lithofacies association
lower Ordovician
