中晚全新世冲绳海槽沉积物物源组成特征及其控制因素OA

The Okinawa Trough has received large amounts of detrital materials from surrounding continentals and islands.However,the characteristics and governing mechanisms of spatiotemporal evolution of provenance during mid-to-late Holocene remain inadequately constrained.Based on AMS14C dating,rare earth elements,and clay-sized Sr-Nd-Pb isotopes of Core N029-13 were studied to clarify the composition of materials from the provenance in the Northern Okinawa Trough during mid-to-late Holocene.Results indicate that fine-grained de-trital materials in the Northern Okinawa mainly came from the Yellow River,and coarse-grained detrital materi-als came probably from the Kyushu Island.Furthermore,comprehensive comparison with other published data re-vealed that sediments in the central and southern Okinawa Trough are dominated by detrital material from the Yangtze River and the Taiwan Island.With the influence of the East Asian winter monsoon,the Yangtze-River-derived detrital materials were transported into the Okinawa Trough via the East China Sea shelf,the con-tinental slope,and the submarine canyons,whereas the detrital materials from Taiwan Island were transported northward by the Kuroshio Current.