Data/hora: 07/06/2024 00:53:46

Provedor de dados: | 5
País: | France
Título: | Turbidite deposition in the southern South China Sea during the last glacial: Evidence from grain-size and major elements records
Autores: | Zhao, Yulong; Liu, Zhifei; Colin, Christophe; Xie, Xin; Wu, Qiong.
Data: | 2011-11
Ano: | 2011
Palavras-chave: | Southern South China Sea; Last glacial; Turbidite; Grain-size analyses; XRF Core Scanner.
Resumo: | High-resolution grain size and major element geochemical measurements were performed on the marine sediments of Core MD05-2895 to help understand the formation of turbidite sequences. Grain-size results show that these turbidite sediments contain more coarse sediment grains than normal marls. The coarse sediment grains are mostly derived from relict sediments on the Sunda Shelf. Relict sediments are composed mainly of quartz, feldspar, tephra and a few titaniferous or ferruginous heavy minerals. Corresponding to the concentration of these minerals, increases in Si/Al, K/Al, Ti/Al and Fe/Al ratios are observed in the turbidite layers. As all the observed turbidite sequences were deposited during the last glacial, the occurrence of these turbidity events is implied to be closely related to instabilities in sea-level-induced sediment supply. We suggest that deposition of sediment particles from a single turbidity current is usually controlled by a counterbalance between gravity and buoyancy, with the interaction of individual grains being of minor importance.
Tipo: | Text
Idioma: | Inglês

Identificador:

https://archimer.ifremer.fr/doc/00213/32464/30929.pdf

DOI:10.1007/s11434-011-4685-7

https://archimer.ifremer.fr/doc/00213/32464/

Editor: | Science Press
Formato: | application/pdf
Fonte: | Chinese Science Bulletin (1001-6538) (Science Press), 2011-11 , Vol. 56 , N. 33 , P. 3558-3565

Fonte:

The Author(s) 2011. This article is published with open access at Springerlink.com

info:eu-repo/semantics/openAccess

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