Characteristics and depositional environment of the oncolite limestone of Chuanshan Formation in Jiangsu-Anhui area
Based on the investigation of field section and the observation and analysis of thin section under microscope,various mi-crofacies 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 Forma-tion,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 dis-turbance degree of sea water suitable for the growth and development of algae,which provides favorable conditions for the formation of oncolites.
oncolitic limestonesedimentary environmentChuanshan FormationJiangsu-Anhui area
万方数据
维普
