The characteristics and evolvement of the tectonic in Tangyuan rift in northern Heilongjiang

Using the two dimension seism survey,this paper deals with the tectonic characteristics and analysis the history of tectonic evolvement to the chosen classic seism surveys to meet the need of hydrocarbon exploration.The result of research shows that Tangyuan rift developed NW and NE two dimension rifts and the NE dimension rift controlled the dimension of Tangyuan rift and its sub-tectonic belts.The NW and NE dimension rifts cut each other and caused Tangyuan rift to exist in several blocks from north to south.The characteristics of tectonic in Tangyuan rift is that the west part is higher than the east part and the south higher than the north today.This rift had undergone three periods of development and six phases of evolvement.