摘要
湖北省兴山大峡口地区,中-上二叠统出露良好,特征明显,详细的野外剖面测量和室内微相分析表明,此剖面岩相主要由生物碎屑颗粒灰岩、泥晶灰岩、砂屑灰岩、砾屑灰岩、硅质岩等组成,文章就岩相与沉积相的关系做了详细论述。沉积相分析表明,中二叠统主要为碳酸盐斜坡沉积,上二叠统主要为台地沉积,其次为滨岸和盆地沉积,中二叠世和晚二叠世分别构成2个大的海侵海退旋回,呈现出持续稳定沉降的局面。
Middle and Upper Permian in Daxiakou section of Xingshan County,Hubei Province is well exposed and has obvious characteristics.According to the strata study of the field outcrops and the laboratory microfacies study of marine carbonate,five kinds of lithofacies can be recognized including bioclastic grainstone,mudstone,micrite calcisiltite,bcalcirud and silica.The relationship between lithofacies and sedimentary facies is also studied.The results of sedimentary facies analysis show that Middle Permian mainly deposits on the carbonate slope,and Upper Permian mainly on the carbonate platform.The coastal and basin sediments are in the second place.The sedimentary evolution indicates that two sedimentary cycles of transgression and regression occur in the Middle Permian and Upper Permian respectively,and the subsidence is continued,widespread and stable.
出处
《合肥工业大学学报(自然科学版)》
CAS
CSCD
北大核心
2011年第6期893-898,904,共7页
Journal of Hefei University of Technology:Natural Science
基金
国家自然科学基金资助项目(070415205)
安徽省自然科学基金资助项目(9075507)
关键词
岩相
沉积相分析
碳酸盐岩斜坡
湖北兴山
lithofacies
sedimentary facies analysis
carbonate slope
Xingshan County in Hubei Province