The Songshugou ultramafic pluton north of the Shangdan fault is the largest ultramafic body in the East Qinling Orogen and assumes the emplacement contract with the Qinling complex. The pluton is composed mainly of finegrained as well as medium and coarsegrained dunite and plagioclasepyroxene peridotite. Debates exist concerning whether ultramafic rocks and adjacent mafic rocks were formed in the same tectonic cycle and whether they experienced a common metamorphismdeformation event or not. This paper presents new data on the inclusions and trace element concentrations of zircons from garnet amphibolites that occur in a metamorphic contact zone. Studies indicate that the ultramafic intrusion and adjacent amphibolites experienced different tectonic events, and the ultramafic pluton was emplaced in amphibolites formed before. Geochemical data suggest that amphibolites have characteristics of MORB and IAT and likely belong to the Qinling Group.