The genesis of adakites and associated MoCu mineralization in nonarc settings in China is poorly constrained. Here, we present geochronology, geochemistry and SrNdPb isotopes for the Tongcun intrusive complex, and report Pb isotopes and 40 Ar 39 Ar age for the Tongcun MoCu deposit. The Tongcun intrusive complex is composed mainly by granodiorite and monzogranite (phase 1 and phase 2), with emplacement age of 160Ma to 148Ma. The Tongcun complex can be classified as typical highK calcalkaline Itype granitoid and also shows adakitic geochemical features. Moreover, the negative Nb, Ta, Ti, and P anomalies and enriched initial 87 Sr/ 86 Sr ratios of 0.70830.7092 of the Tongcun intrusive complex are consistent with those of the subductionrelated magmatism. The 40 Ar 39 Ar dating of sericite, which is intergrown with chalcopyrite, indicates that the late Cu mineralization event occurred at ~155.5Ma. The early Mo (Cu) and the late Cu mineralization events in this deposit were temporally, spatially and genetically associated with the emplacement of monzogranite (phase 1). There are no obvious linear correlation between SiO 2 and most of the major and trace elements, and all rock samples fall within the fields of unfractional crystallization felsic granites in Zr+Nb+Ce+Y versus FeO T /MgO and (K 2 O+Na 2 O)/CaO diagrams, indicating that partial melting rather than fractional crystallization has played an important role for the formation of the Tongcun intrusive complex. Magmatic inherited zircons from the Tongcun granitoids with the age peaked at 780812Ma, imply that the Neoproterozoic igneous rocks in the lower crust have been incorporated into the magma source. The uniform ε Nd ( t ) (−6.3 to −7.3), initial 87 Sr/ 86 Sr, 207 Pb/ 204 Pb (15.59615.621), and 208 Pb/ 204 Pb (38.37438.650), as well as high K 2 O contents (3.364.10wt.%) and relatively high Mg# values (35.40 to 40.30) suggest the Tongcun intrusive complex was derived from partial melting of the thickened lower continental crust triggered by basaltic magma underplating plus additional input from the EM II mantle-derived basaltic melts. The Tongcun area was controlled by a compression setting related to the subduction of the PaleoPacific Plate in Mesozoic period.