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	Provedor de dados ArchiMer (1) Autor De Lange, Gert J. (1) Hensen, Christian (1) Reitz, Anja (1) Thomson, John (1) Palavra-chave Eastern Mediterranean (1) Lithium (1) Manganese (1) Molybdenum (1) Sapropel S1 (1) Tipo do documento Text (1) Ano 2006 (1) País France (1) Idioma Inglês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 1 Primeira ... 1 ... Última Source and development of large manganese enrichments above eastern Mediterranean sapropel S1 ArchiMer Reitz, Anja; Thomson, John; De Lange, Gert J.; Hensen, Christian. [ 1] The residual dark unit of the most recent eastern Mediterranean sapropel (S1) is usually overlain by sediments with enhanced concentrations of MnO(x) in two separated layers. The variability and magnitude of the Mn enrichment at different locations and water depths indicate that Mn must have been added preferentially to sediments at intermediate ( 1 - 2 km) water depths. We propose a two-stage mechanism for the Mn enrichment that involves decreasing oxygenation with increasing water depth. This mechanism involves the loss of reduced Mn(2+) from the deepest sediments (> 2 km water depth) into overlying anoxic waters and a variable gain of MnOx in sediments in contact with oxygenated waters at shallower depth. In the S1 unit that receives the extra... Tipo: Text Palavras-chave: Manganese; Sapropel S1; Eastern Mediterranean; Molybdenum; Lithium. Ano: 2006 URL: https://archimer.ifremer.fr/doc/00234/34529/33426.pdf Registros recuperados: 1 Primeira ... 1 ... Última

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