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	Provedor de dados ArchiMer (1) Autor Cannat, Mathilde (1) Fouquet, Yves (1) Normand, Alain (1) Ondreas, Helene (1) Palavra-chave Ashadze (1) Hydrothermal activity (1) Hydrothermal explosion crater (1) Mid-Atlantic Ridge (1) Ultramafic rocks (1) Tipo do documento Text (1) Ano 2012 (1) País France (1) Idioma Inglês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 1 Primeira ... 1 ... Última Geological context and vents morphology of the ultramafic-hosted Ashadze hydrothermal areas (Mid-Atlantic Ridge 13 degrees N) ArchiMer Ondreas, Helene; Cannat, Mathilde; Fouquet, Yves; Normand, Alain. Recent ROV dives and high-resolution bathymetric data acquired over the Ashadze fields on the Mid-Atlantic Ridge (13 degrees N) allow us to derive constraints on the regional and local geological setting of ultramafic-hosted hydrothermal fields. The active vent fields of Ashadze hydrothermal fields are located in the western axial valley wall, downslope from the termination of a prominent corrugated surface and in a transitional domain with respect to ridge segmentation. The study of the shipboard and ROV bathymetry shows that decameter (100 m by 60 m) to kilometer-scaled rockslides shape the axial valley wall slopes in this region. The Ashadze 1 vent field occurs on a coherent granular landslide rock mass that is elongated in an E-W direction. The Ashadze... Tipo: Text Palavras-chave: Ashadze; Mid-Atlantic Ridge; Hydrothermal activity; Hydrothermal explosion crater; Ultramafic rocks. Ano: 2012 URL: http://archimer.ifremer.fr/doc/00111/22223/19895.pdf Registros recuperados: 1 Primeira ... 1 ... Última

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