Data/hora: 11/06/2024 02:26:37

Provedor de dados: 	5	
País: 	France	
Título: 	Etude isotopique (Sr-Nd) de l'origine des depots fins holocenes du littoral atlantique (S-O France)	
Autores: 	Parra, M; Trouky, H; Jouanneau, Jm; Grousset, F; Latouche, C; Castaing, P.	
Data: 	1998-09	
Ano: 	1998	
Palavras-chave: 	Isotope Sr-Nd; Origine; Sédiment fin holocène; Vasière littorale atlantique; Sr-Nd isotope; Origin; Holocene fine-grained deposit; Atlantic littoral mudflat.	
Resumo: 	The fine-grained sediments of the West Gironde mud patch derive mainly from materials supplied via the Gironde estuary. Between 1500 and 1200/1300 years BP and 300/400 years BP and the present day, the Sr isotopic and chemical compositions of the estuarine silty clay inputs are the same. In contrast, these compositions were different during the period 1200/1300 to 300/400 years BP These variations probably reflect anthropogenic activities including cultivation and agriculture, in the Garonne and Dordogne drainage basins during the medieval period. Modern silty clay sedimentation in the mud flats of the Marennes-Oleron basin and Perthuis Breton is characterised by the occurrence of important quantities (between 40 and 90 % of the total) of detritus that issues from the Gironde estuary. The autochthonous silty clays derived from outcrops of Jurassic green marls and Flandrian deposits are mixed with estuarine allochthonous clays delivered by coastal surface currents. In the Anse de l'Aiguillon, the muds are mainly composed of these autochthonous silty clays. The silty clay infilling of these mud flats has been highly influenced by the development of the oyster and shellfish aquaculture.	
Tipo: 	Text	
Idioma: 	Francês	
Identificador: 	http://archimer.ifremer.fr/doc/00325/43648/43244.pdf

DOI:10.1016/S0399-1784(99)80022-X

http://archimer.ifremer.fr/doc/00325/43648/	
Editor: 	Gauthier-villars/editions Elsevier	
Formato: 	application/pdf	
Fonte: 	Oceanologica Acta (0399-1784) (Gauthier-villars/editions Elsevier), 1998-09 , Vol. 21 , N. 5 , P. 631-644	
Fonte: 	Elsevier, Paris

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