Sediment provenance evolution of the central Okinawa Trough since late Pleistocene recorded by major elements

XU Xueyuan; JIANG Shenghui; ZHAO Kexin; HUANG Yu; ZHAO Chunjuan; SHAO Zhinan; LI Deyong

doi:10.13984/j.cnki.cn37-1141.2025.06.002

Abstract：Based on major element analysis,combined with correlation analysis and R factor analysis,paleoenvironment evolution records of Core S01-10 in the central Okinawa Trough since late Pleistocene had been obtained.Major elements data indicated that the content of major element oxides showed ob-vious three depositional units on the Millennium scale:Unit A1(400～143 cm)was formed from Late Deglaciation to Early Holocene,during which the terrigenous sediments mainly came from the Yellow River and a small admixture from the Yangtze River,while the contribution of Taiwan materials could be ignored.Unit A2(143～105 cm)was formed in Early Holocene,and the dominant provenance was still the Yellow River.The contribution of Taiwan materials was relatively increased while the influ-ence of the Yangtze River decreased.Unit A3(105～0 cm)was formed from Early Holocene to Middle Holocene.The dominant provenance was the mixture of the Yellow River and Taiwan,and the contri-bution of the Yangtze River material could be ignored.The results of correlation analysis and R factor analysis of major elements showed that the content of typical element oxides was mainly affected by the input of terrigenous sediments,while the effects of marine biologic deposition,hydrothermal activity and volcanic events were minor.Sea level fluctuation and intensity variation of the East Asian monsoon were the main controlling factors of material provenance in the central Okinawa Trough.Based on the test and analysis of Core S01-10 in the central Okinawa Trough,this paper provides a valuable reference for studying the evolution history of terrigenous sediment input in the region since the late Pleistocene.