Heavy Mineral Features and Source of Sediments of Jurassic in Bohu Depression

Based on study of the features of heavy mineral assemblage and the variation characteristics of stability factor of Jurassic in Bohu depression,this area was di-vided into several sedimentary zones and the parent rock properties and the rock types in each sedimentary zone were recovered,thus the sources of sediment s of each sedimentary zone were determined.There existed two main sediment source systems and two correspondingpalaeo-current systems in the original basin and the o-riginal basin was in an extensional environment of north-south trend.