The Functions of China Marginal Sea Sediments in the Cycle of Biogenic Elements |
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| Authors: | Sun Yunming SONG Jinming |
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| Institution: | 1. Institute of Oceanology, ChineseAcademy of Sciences, Qingdao 266071; Qingdao University, Qingdao 266071
2. Institute of Oceanology, ChineseAcademy of Sciences, Qingdao 266071 |
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| Abstract: | 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. |
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| Keywords: | China marginal sea sediment cycle ofbiogenic element |
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