Characteristics of Lithofacies Paleogeography During Datangian Age Early Carboniferous) in Xifeng and Zunyi, Guizhou

Key words: 
• Early Carboniferous /
• Datangian age /
• aluminum bearing formation /
• lithofacies paleogeography /
• Xifeng and Zunyi

Abstract: Based on the data of petrology, mineralogy and paleontology, this paper uses the theory and ways of modern sedimentology, analyzes the test result of microelement, paleosalinity and isotope to research lithofacies paleogeography of Datangian age. The result shows that the clay stone is marine facies deposit in the lower part of aluminum bearing formation; in the upper part, aluminous rock is transitional facies deposit, and the top is continent lakes and marshes facies deposit. It suggests that sedimentary environment of Datangian Age be the base of epicontinental sea which occur during early transgression period and work up to the lagoon and form clay stone deposit, with the aggrandizement of desalination, the lagoon become small, the salinity is reduced to form aluminous rock, at last, it is end with lakes and marshes deposit. Therefore, tracing deposit sequence of aluminum bearing formation, the author believes that aluminum ore is the sediment of marine regression. 