The post-collisional magmatism of the Junggar Terrane is characterized by intrusion of large amounts of granitoids and minor basic/ultrabasic rocks. The granitoids comprise two magmatic suites: calc-alkaline and alkaline, which were emplaced contemporaneously at about 294Ma. The calc-alkaline rocks are typically sodium-rich (Na2O/K2O=1.1-3.5) and metaluminous (A/NK.1.0, A/CNK=0.78-1.04). They show mildly fractionated REE patterns ((La/Yb)N, 15) and spidergrams with strong depletion of Nb, Ti and, to a lesser extent, Sr. The alkaline granites have high contents of SiO2 (75-78%), alkalis, Nb, HREE, Y, Sn, F and high FeO/MgO ratios and huge Sr and Eu depletion in the spidergrams. Moreover, they display characteristic tetrad REE patterns and non-CHARAC trace element behaviour. The two rock suites have similar initial Nd and Sr isotopic compositions, with 1Nd