| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
Bias in the paleoceanographic time series: Tests with a numerical model of U, C-org, and Al burial
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| Autores: |
Donnadieu, Y
Lecroart, P
Anschutz, P
Bertrand, P
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| Data: |
2002-07
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| Ano: |
2002
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| Palavras-chave: |
Time lag
Sedimentary system
High-resolution record
Modeling
Bioturbation
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| Resumo: |
We have constructed a nonsteady state numerical model of organic carbon, aluminum, and uranium burial to examine the dynamic response of sediments to variations on thousand years scale. The three components are defined by distinct behaviors in the sedimentary system. The aluminum is a conservative component, the organic carbon is a nonconservative component degraded in superficial sediment, and the uranium is a component affected by redox conditions. By introducing a simultaneous variation of incoming fluxes of C-org and Al, geochemical profiles of Al, Corg, and U clearly show separate distributions after burial. Each component record the synchronous variation of the incoming fluxes, but the position in the sedimentary pile of the recording differs from a component to another. We show that a minimum of U could be linked to a rapid ascent of the oxic front during an increase in Corg flux.
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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
https://archimer.ifremer.fr/doc/00223/33390/31872.pdf
DOI:10.1029/2001PA000638
https://archimer.ifremer.fr/doc/00223/33390/
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| Editor: |
Amer Geophysical Union
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| Formato: |
application/pdf
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| Fonte: |
Paleoceanography (0883-8305) (Amer Geophysical Union), 2002-07 , Vol. 17 , N. 3 , P. 6.1-6.11
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| Direitos: |
Copyright 2002 by the American Geophysical Union.
info:eu-repo/semantics/openAccess
restricted use
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