Abstract:Two Cretaceous volcano-sedimentary sequences were identified in the Jianning-Taining region of Mts Wuyi in west Fujian, each one consisting of volcanic rocks below and clastic sedimentary deposits above. Zircon U-Pb dating results and geochemistry analysis show that the lower volcanic rock series erupted in Early Cretaceous at 141 to 135Ma, with the affinity of volcanic arc in a continental margin, and rich in Hf isotope (-20.2~1.9). While the upper volcanic rock series erupted at 105-97 Ma in the latest Early Cretaceous and earliest Late Cretaceous, with the affinity of back-arc extensional setting and relatively depleted in Hf isotope (-16.1~10.2). These two Cretaceous volcano-sedimentary sequences can be correlated with those in other regions of SE China.It is found that the magmatism lull between these two volcanisms displays a tendence of vanishing in an array from SW to NE, and it all ceased nearly at 125 Ma. During this magmatic quiescent period, infilled, in SE China, a package of fluvial-lacustrine facies deposits that were subsequently deformed by a compressional event. The upper Late Cretaceous volcano-sedimentary series seems to be controlled by extensional faulted basins, in which accumulated a thick, gypsum-bearing red beds. These two Cretaceous volcano-sedimentary sequences recorded two tectonic stages in SE China with distinct features that marks the change from Early Cretaceous volcanic arc and associated compressional deformationto Late Cretaceous back-arc extension and the generation of faulted basins.