苏皖地区船山组核形石灰岩特征及沉积环境  

Characteristics and depositional environment of the oncolite limestone of Chuanshan Formation in Jiangsu-Anhui area

作　　者：宋德朋 Song Depeng(Nanjing Engineering Vocational College,Nanjing 211135,Jiangsu,China)

机构地区：[1]江苏省南京工程高等职业学校,江苏南京211135

出　　处：《地质学刊》2024年第2期155-162,共8页Journal of Geology

基　　金：2022年度江苏省教育科学规划重点课题“岗课赛证融合视域下多元主体协同育人机制研究”(B/2022/02/29)。

摘　　要：通过野外剖面调查以及岩石镜下薄片的观察分析,研究了船山组灰岩的各种微相标志,确定了岩石的成因机理和沉积环境。结果显示,苏皖地区船山组岩石的主要类型为核形石灰岩和生物屑灰岩,其次为微晶灰岩;船山组形成时期研究区处于一个水动力较强的浅水环境,沉积了一套以核形石灰岩为特色的碳酸盐岩地层。晚石炭世气候的变异和海平面的下降等因素改变了海水深度、温度、扰动程度等,促进了藻类的生长发育,为核形石的形成提供了有利条件。Based on the investigation of field section and the observation and analysis of thin section under microscope,various microfacies markers of the Chuanshan Formation limestone have been studied,and the genetic mechanism and sedimentary environment information of the rock have been determined.The study shows that the main rock types of the Chuanshan Formation in Jiangsu-Anhui area are oncolite limestones and bioclastic limestones,followed by micritic limestones.During the formation of the Chuanshan Formation,the study area was in a shallow water environment with strong hydrodynamic force,and a set of carbonate strata with oncolitic limestones was formed.The variation of Late Carboniferous climate and the decrease of sea level made the depth,temperature and disturbance degree of sea water suitable for the growth and development of algae,which provides favorable conditions for the formation of oncolites.

关 键 词：核形石灰岩 沉积环境 船山组 苏皖地区 

分 类 号：P588.245[天文地球—岩石学]