The Early Carboniferous sequence stratigraphy on the eastern margin of the Guizhong depression, Guangxi

Abstract: Based on the study of the slope facies along the Yajiao and Yunjiang sections in Xiangzhou on the eastern margin of the Guizhong depression,the authors carried out the classification and correlation of Carboniferous sequence stratigraphy on the slope facies. According to the development characteristics of 3rd grade sequence in slope facies,the Baping Formation of the Early Carboniferous is divided into five 3rd grade sequences (CSQ1-5),which constitute a 2nd grade sequence of the Early Carboniferous. The Lower Carboniferous sequence stratigraphic classification frameworks between the platform and the slope facies are consistent approximately,and hence the correlation could be carried out directly. On the basis of regional sedimentary sequence correlation,the Lower Carboniferous sequence stratigraphic framework is established. Sea-level changes in Early Carboniferous in this region is also discussed.