PAN style="FONT-FAMILY: ’Times New Roman’,’serif’" lang=EN-US>///The Cida complex is located in the Panxi rift, the western margin of Yangtze Craton, SW China. The SiO2 contents for mafic rocks to felsic rocks range from 40.06% to 68.54% smoothly. The mafic rocks and felsic rocks are the dominant rock types, whilst the intermediate rocks are rare, mineralogical heterogeneous, and usually have mottled structure. The field and petrographic observations suggest that intermediate rocks were likely formed by magma mixing. The felsic rocks characterized by metaluminous affinities and low SiO2 contents, imply that they are possibly resulted from partial melting of basaltic lower crust. In contrast, the mafic rocks with OIB geochemistry and high temperature signature indicate that the mafic magma was derived from a mantle plume source. The LA-MC-ICP-MS U-Pb zircon dating yields an average of age is (243±0.77) Ma for the mafic rocks, and (240.5±0.76) Ma for the felsic rocks, possibly representing the end age of the Emeishan large igneous province magmatism.
