COAL ACCUMULATION CHARACTERISTICS OF TIDAL-FLAT SEDIMENTARY SYSTEM IN JUYE COALFIELD

Based on the data of cores and well logs,the characteristics of sedimentary facies in Permo-Carboniferous epicontinental basin,Juye coal field are analyzed.The sedimentary system is divided into 3 supersequences and 12 third order sequences.The framwork of the stratigraphy sequence is established,based on that the sequence stratigraphy and its internal composition have been recognized through drawing up the sections and planimetric maps.The study shows that the tidal-flat sedimentary system has close relation with the coal accumulation under the epicontinental conditions.And the thickness of the sand body has the positive correlation with the coal seam.