Minerals are the main components of sediments, whose terrigenous parts are carried into the ocean by rivers or winds and deposit directly or indirectly. The amount of the terrigenous minerals in marine sediments in directly indicates the source area of supply and the strength of the transport agent. Minerals in sediment are strongly affected by tectonic movement and geomorphic evolution in long time scale. Therefore, large tectonic movement must lead to change of mineral components and fluxes. The South China Sea (SCS) basin experienced two tectonic expansions in Cenozoic; the second expansion occurred between 32～15.5Ma, formed the central basin. The Palaw an block moved far away from the northern continent. The Tibet Plateau experienced three accelerated uplifts a t 25～17Ma.B.P, 10～8Ma.B.P and～4Ma.B.P～present. In order to determine the effective tectonic movement proxy indexes and find more evidence for the two large tectonic events in marginal sea sedimentary mineral composition and their fluxes w ere studied.