THE ACTIVE STAGES OF THE BOUNDARY FAULTING AND THE DEPOSITION-FILLING PATTERN IN HUANGXIAN FAULTED BASIN

The sequence stratigraphic division of basin filling succession in Huangxian faulted basin is conducted,and combined with the analysis of tectonic evolution stages of basin.It is indicated that the tectonic evolution in Huangxian faulted basin was generally gone through two rifting stages in Paleogene.The first stage is characterized by the intermittent rapid subsidence and the second one is dominated by the comtinuously slow subsidence.Due to the control of synsedimentary activity of the boundary faults on the basin filling,The sequences development in different stage have different depositional features,but the internal units of sequences,the depositional systems and the package patterns of the facies show the ordered property.The filling pattern in Huangxian faulted basin is presented,and it is indicated that the coal accumulation is stronger in both low-stand period and water progression period.