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	Provedor de dados ArchiMer (1) Autor Cannat, M (1) Mevel, C (1) Seyler, M (1) Palavra-chave And petrology (1) Geochemistry (1) Peridotite midocean ridge Indian Ocean petrology mantle heterogeneity geochemistry : composition of the mantle marine geology and geophysics : midocean ridge processes information related to geographic region : Indian Ocean history of geophysics : volcanology (1) Tipo do documento Text (1) Ano 2003 (1) País France (1) Idioma Inglês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 1 Primeira ... 1 ... Última Evidence for major-element heterogeneity in the mantle source of abyssal peridotites from the Southwest Indian Ridge (52 degrees to 68 degrees E) ArchiMer Seyler, M; Cannat, M; Mevel, C. A suite of 53 samples of mantle spinel lherzolites and harzburgites dredged at 13 sites between 52degreesE and 68degreesE along the Southwest Indian Ridge has been studied for petrography and mineral major element chemistry. Results show that the residual mantle beneath this very slow-spreading/cold ridge is strongly heterogeneous in modal and mineral compositions at local and regional scales and underwent greater extents of melting than predicted by melting model and by compositions of the basalts dredged with the peridotites. Along-axis, the peridotite compositional variability defines a concave pattern with increasing depletion at both ends of the studied section (e. g., approaching Rodrigues Triple Junction to the East and Gallieni fracture zone to the... Tipo: Text Palavras-chave: Peridotite midocean ridge Indian Ocean petrology mantle heterogeneity geochemistry : composition of the mantle marine geology and geophysics : midocean ridge processes information related to geographic region : Indian Ocean history of geophysics : volcanology; Geochemistry; And petrology. Ano: 2003 URL: https://archimer.ifremer.fr/doc/00224/33506/31941.pdf Registros recuperados: 1 Primeira ... 1 ... Última

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