Petrological, geochemical and Nd isotopic data are reported for the Ne oproterozoic Wasigou complex in the Kangdian rift on the western margin of the Yangtze block. This complex is an I-type granite, and its geochemical and Nd isotopic characteristics suggest that it was generated by partial melting of the pre-existing Late Mesoproterozoic-Early Neoproterozoic island arc crust. The early granite was produced by the tectonic transition from compression to intraplate extension on the western margin of the Yangtze block, whereas the late granodiorite was formed in an intraplate setting and might be related to the Neoproterozoic plume event. Their arc-like geochemical features such as Nb-Ta depletion must have been inherited from the protoliths rather than from their tectonic setting during the formation of the complex.