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	Provedor de dados Anais da ABC (AABC) (1) ArchiMer (1) Autor Abassi, A (1) Baptista Neto,José A. (1) Buscail, R (1) Charriere, B (1) Fonseca,Estefan M. (1) Giresse, P (1) Masque, P (1) Mcalister,John J. (1) Patchineelam,Sambasiva R. (1) Patchineelam,Soraya M. (1) Peixoto,Tomás C.S. (1) Sanchez-cabeza, Ja (1) Smith,Bernard J. (1) Mais... Palavra-chave 210Pb (2) Carbone organique (1) Flux of heavy metal (1) Geochronology (1) Gravity-induced process (1) Guanabara Bay (1) Méditerranée nord-occidentale (1) North-western Mediterranean (1) Organic carbon (1) Pb-210 (1) Processus gravitaires (1) Sedimentation rate (1) Vitesse de sédimentation (1) Mais... Tipo do documento Info:eu-repo/semantics/article (1) Text (1) Ano 2013 (1) 2001 (1) País Brazil (1) France (1) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Geochronology and heavy metal flux to Guanabara bay, Rio de Janeiro state: a preliminary study Anais da ABC (AABC) Baptista Neto,José A.; Peixoto,Tomás C.S.; Smith,Bernard J.; Mcalister,John J.; Patchineelam,Soraya M.; Patchineelam,Sambasiva R.; Fonseca,Estefan M.. Guanabara Bay, located in Rio de Janeiro state. It is surrounded by the second most important metropolitan area of the country. Over recent decades, land disturbance and urbanization in the surrounding area has significantly increased sediment input to the bay and had a negative effect on its overall environmental. This is especially related to high volumes of untreated sewage and industrial effluents. This study evaluates the history of this human impact through detailed examination of a sediment core taken from the northern portion of Guanabara Bay. A geochronology is established using 210Pb dating and related to organic carbon and heavy metal fluxes to the sediments. This gave a calculated net average sedimentation rate for the core of 0.67 cm.year-1.... Tipo: Info:eu-repo/semantics/article Palavras-chave: 210Pb; Geochronology; Flux of heavy metal; Guanabara Bay. Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000401317 Biotracers and geotracers of depositional events in NW Mediterranean margin over the past two centuries ArchiMer Giresse, P; Buscail, R; Charriere, B; Abassi, A; Masque, P; Sanchez-cabeza, Ja. A detailed sedimentological and geochemical investigation was performed on slope sediments collected from the Gulf of Lions and Catalonian margins and from the northern Balearic margin. The study was based on cores, about 50 cm long. Various physiographic sites (canyons, open slopes) were selected according to the available sediment accumulation rates obtained with the Pb-210 geochronological method. At a short time scale, various parts of the slope were characterized by muddy hemipelagic sediment. Sedimentological data suggested that deposition was continuous. Total organic carbon and its hydrolysable fraction decreased downcore. Significant increase of C/N ratio downcore resulted from an early diagenetic process in response to the burial effect. However... Tipo: Text Palavras-chave: Méditerranée nord-occidentale; Vitesse de sédimentation; Processus gravitaires; Carbone organique; 210Pb; North-western Mediterranean; Sedimentation rate; Gravity-induced process; Organic carbon; Pb-210. Ano: 2001 URL: http://archimer.ifremer.fr/doc/00322/43335/42892.pdf Registros recuperados: 2 Primeira ... 1 ... Última

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