DIAGENESIS OF CARBONATE ROCKS ON PLATFORM MARGIN AND DEEP WATER SLOPE IN THE UPPER SINIAN ORDOVICIAN IN THE MIDDLE TO UPPER YANGTZE AREA

Based on the study of petrology,using microprobe analysis,stable isotope of carbon and oxygen,inclusion analysis and geochemical analysis,the diagenesis of carbonates,such as cementation,dolomitization,on platform margin and deep water slope in the middle Yangtze platform were studied in detail.And the diagenetic environment was divided and the model of porosity evolution was proposed.