Zhulumute quartz syenite porphyry occurs in the northern part of West Junggar. Geochemical results show that the quartz syenite porphyries are characterized by high K2O (460%～558%), total alkalies (K2O+Na2O) (814%～961%), high K2O/Na2O (1.25～1.38) ratio with A/CNK values of 1.04～1.18, belong to peraluminous and highK calcalkaline series. The quartz syenite porphyries have high total REE (176 ppm～205 ppm) contents. They are enriched in light rare earth elements (LREE) \[(La/Yb)N=6.0～10.4\], nearly flat heavy rare earth elements (HREE) \[(Gd/Yb)N=0.96～1.12\], as well as pronounced negative Eu anomalies (Eu/Eu*= 0.23～0.26). On a primitive mantle normalized diagram, they show the relative enrichment of LILE (i.e. Rb, K, U and Th) and La, Nd and Zr and relative depletion of Nb, Ta, P and Ti. Their magma sources have likely experienced fractional crystallization of plagioclase, apatite and FeTi oxides. The quartz syenite porphyries have positive εNd (t) and εHf(t) values, with young t2DM(Nd) (474～572 Ma) and t2DM(Hf) (357~931 Ma) ages, suggesting that their sources are mainly derived from the juvenile material of Paleozoic formation. They show high zircon saturation temperatures (Tzr) of 834～865℃ and are almost simultaneous with the early Permian Atype granites indicating that the northern West Junggar was a high temperature, extensional setting during early Permian.