中文摘要：

The contents of biogenic elements in China marginal sea sediments are related to their grain sizes, river transport, et al. In general, the finer the grain size is, the higher the contents of organic matter and OC, N, P are, the lower the contents of S and Si are. The biogeochemical environments of sediments are related to Eh, pH, temperature content of OC,Fe3+/Fe2+ radio, water dynamics condition, grain size of sediment, S system in sediment interstitial waters, et al., and they influence the early diageneses and cycle of biogenic elements in sediments. In most regions of China marginal sea, the flux directions of S2-, HS-,3- NH4+H4SiO4, PO4 , across the sediment-water interface are from sediment to the overlying seawater, the flux directions of SO42-, HCO3-, NO3-, NO2- across the sediment-water interface are from the overlying seawater to sediment. The irrigation of living things is important in the cycle of the biogenic elements across sediment-water interfaces.

英文摘要：

The contents of biogenic elements in China marginal sea sediments are relatedto their grain sizes, river transport, et al. In general, the finer the grain size is, the higherthe contents of organic matter and OC, N, P are, the lower the contents of S and Si are. Thebiogeochemical environments of sediments are related to Eh, pH, temperature content of OC,Fe~(3+)/Fe~(2+) radio, water dynamics condition, grain size of sediment, S system in sedimentinterstitial waters, et al., and they influence the early diageneses and cycle of biogenic elementsin sediments. In most regions of China marginal sea, the flux directions of S~(2-), HS~-, H_4SiO_4,PO_4~(3-), NH~(4+) across the sediment-water interface are from sediment to the overlying seawater,the flux directions of SO_4~(2-), HCO_3~-, NO_3~-, NO_2~- across the sediment-water interface arefrom the overlying seawater to sediment. The irrigation of living things is important in the cycleof the biogenic elements across sediment-water interfaces.