Abstract:

Continental faulted basins formed in specific depositional environment. No matter they are dust pan,half graben and complex types, they have distinct general characters in section configuration and the distribution of sediments.In section configuration, the depressions are either triangle or reversed trapezoid-fenestral structure.Every type of faulted basin possesses clear deep depressed center with fine grained sediments and the sediments around the center get coarse. In a complete ingression regression cycle,the boundary lines between fine grain sediments and coarse grain sediments are two polygons appeared as a rhomb,that is the "rhombic centre". The rhombic centres may occure in bunches,and their shapes may be variety.The rhombic centres are the main source rock areas of the faulted basins.

Key words: faulted basin, fenestral structure, rhombic centre, sedimentary regularity, source rock area