Abstract：The Upper Carboniferous carbonate rocks,with 100meters thickness and abundant fossils,were well developed in Susong area of Anhui Province. These rocks belonged to the typical shallow carbonate platform deposits. The grains quantitative analysis showed that the lithofacies mainly included grainstones and packstones with the content of 81.2％ and 69.6％ respectively; and shallow marine bioclasts predominated. Moreover,there were wackstones and lime mudstones with the grains content of 26.4％ and 4.1％ respectively. The open-marine platform facies and tidal flat facies were mainly developed in study area,which could be divided into five types of subfacies including intra-platform shoal,intra-platform basin,intra-platform flat and inter-tidal flat and supra-tidal flat. Combining the above characteristics,three long-term transgressive-regressive cycles could be recognized from the Upper Carboniferous. The sea-level changes were characterized by the high frequency short-term sea-level fluctuations superimposing on a long-term sea-level fall. These three cycles were roughly corresponding to the long-term transgressive-regressive cycles in other areas of Yangtze Plate and the same-time strata in Euramerican Plate. It also indicated that the sea-level changes were influenced by alternation of the glacial period and non-glacial period in Gondwana.
Lu Yanlin,Li Shuangying,Zhao Daqian et al. Quantitative analysis of carbonate platform sediments and sea-level changes of the Upper Carboniferous in Susong area, Anhui Province[J]. JOPC, 2014, 16(5): 735-746.
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