Articles | Volume 22, issue 14
https://doi.org/10.5194/bg-22-3533-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-22-3533-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Faithful transfer of radiolarian silicon isotope signatures from water column to sediments in the South China Sea
Qiang Zhang
CORRESPONDING AUTHOR
Key Laboratory of Ocean and Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
School of Geography, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
George E. A. Swann
School of Geography, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
Vanessa Pashley
National Environmental Isotope Facility, British Geological Survey, Keyworth, Nottingham, NG12 5GG, UK
Matthew S. A. Horstwood
National Environmental Isotope Facility, British Geological Survey, Keyworth, Nottingham, NG12 5GG, UK
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Short summary
We present the first coupled record of radiolarian silicon isotopes (δ30Sirad) from paired water column and surface sediment samples, along with the fractionation factor for δ30Sirad in the South China Sea. No significant discrepancies in δ30Sirad values were observed between plankton and sediment samples, implying minimal dissolution impact on δ30Sirad during sinking. This indicates faithful preservation of the δ30Sirad signature and its potential for studying past marine silicon cycle changes.
We present the first coupled record of radiolarian silicon isotopes (δ30Sirad) from paired water...
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