The Danfeng meta-volcanic rocks in Shangzhou area, Shaanxi province are composed chiefly of basic meta-volcanics with minor andesitic volcanics which were metamorphosed to higher greenschist t6 lower amphibolite factes and underwent intense deformation. Geochemical data from these rocks indicate that they are a complex of metavolcanics containing both cafe-alkalic and tholeiitic series volcanics, of which cafe-alkaline series rocks are a cogenetic volcanics developed from primary magma by fractional crystallization and the contents of their major and trace elements (especially for the compatible elements such as Ni, Cr) were controlled by lowpressure fractiollal crystallization. The tholeiitic basalts have relatively high Ti/V, Ti/Y,Ti/Zr, low Ti/Sc, V/Sc, Th/Yb and Zr/Y ratios than cafe-alkaline basalts. Theformer has low REE contents and slightly flat REE pattern. On the contrary, the latter has relatively high REE contents and light REE enrichment patterns. These geochemical features suggest that the two series volcanics were derived from different sources.In summary, the two series volcanics are characterized by high SiO2, K2O, A2O3,and low TiO2, P2O5, as well as high incompatible elements such as Th, Ba, Rb,low Nb, Ta,Ti,Y,Yb and high Th/Ta, La/Nb and Ba/Zr ratios, showing geochemical characteristics of supra subduction Zone basalts. All these geochemical features mentioned above strongly indicate that these volcanics were possibly formed initially in an island arc setting of an oceanic supra-subduction zone.