Data/hora: 05/06/2024 17:27:40

Provedor de dados: | 5
País: | France
Título: | Influence of orbital forcing and sea level changes on sedimentation patterns in the Timor Sea during the last 260 ka
Autores: | Moreno, Eva; Bassinot, Franck; Baudin, Francois; Venec-peyre, Marie-therese.
Data: | 2008-01
Ano: | 2008
Resumo: | [1] A multiproxy study of core MD98-2166 makes it possible to investigate the influence of orbital forcing and sea level changes on Timor Sea sedimentation during the last 260 ka. Spectral analysis reveals a strong imprint of obliquity in all proxies. This is particularly puzzling for the CaCO(3) and total organic carbon (TOC) records since recent data obtained on nearby core MD01-2378, collected at a shallower water depth, showed a concentration of spectral power in the eccentricity and precession bands. Our results suggest that while sedimentary record in shallower core MD01-2378 shows a clear low-latitude response, that of core MD98-2166 reflects a stronger influence of high-latitude forcing through deepwater changes. In addition, Rock-Eval analyses show that part of the organic carbon could be of terrestrial origin, especially during glacial periods. This suggests that glacial/interglacial TOC fluctuations not only reflect changes of marine productivity and/or preservation at the seafloor but also reflect enhanced input of terrestrial material during periods of low sea level.
Tipo: | Text
Idioma: | Inglês

Identificador:

https://archimer.ifremer.fr/doc/00238/34885/33152.pdf

https://archimer.ifremer.fr/doc/00238/34885/33153.pdf

DOI:10.1029/2007PA001423

https://archimer.ifremer.fr/doc/00238/34885/

Editor: | Amer Geophysical Union
Formato: | application/pdf
Fonte: | Paleoceanography (0883-8305) (Amer Geophysical Union), 2008-01 , Vol. 23 , N. 1 / PA1207 , P. 1-13

Fonte:

Copyright 2008 by the American Geophysical Union.

info:eu-repo/semantics/openAccess

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