Abstract：Huangxian Basin in Shandong Province is an important basin rich in coal and oil shale in eastern China. The Paleogene Lijiaya Formation is the main strata of coal-bearing rock series in the basin. According to the theory of sequence stratigraphy,the sequence stratigraphic framework of the Paleogene was established. Based on drilling,logging and core data,the sedimentary facies of the Lijiaya Formation were classified,and sedimentary facies maps of different system tracts of the Lijiaya Formation were compiled. Main conclusions are as follows: (1)Sedimentary facies of lake,braided fluvial delta and fan delta were developed in the Lijiaya Formation. (2)In sequence Ⅰ,the lowstand system tract mainly developed braided fluvial delta facies,the lake extension system tract mainly developed fan delta facies and lacustrine facies,and the highstand system tract mainly developed fan delta facies. In sequence Ⅱ,the lowstand system tract mainly developed braided fluvial delta facies,the lake extension system tract mainly developed fan delta facies and lacustrine facies,the hightstand system tract mainly developed lacustrine facies. (3)During the depositional stage of the sequence Ⅰ,the basin experienced the formation period in the lowstand system tract,the expansion period in the lake extension system tract and the shrink period in the highstand system tract. During the depositional stage of the sequence Ⅱ,the basin experienced slow expansion period in the lowstand system tract,the expansion period in the lake extension system tract and the shrink period in the hightstand system tract.
. Sedimentary facies characteristis and evolution of coal-bearing rock series of the Paleogene Lijiaya Formation in Huangxian Basin, Shandong Province[J]. JOPC, 2019, 21(3): 469-478.
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