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| HAL : hal-00720895, version 1 |
| DOI : 10.1016/j.chemgeo.2012.04.009 |
| Fiche détaillée |  Récupérer au format |
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| Chemical Geology 312 (2012) 93-117 |
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| Behavior of fluid-mobile elements in serpentines from abyssal to subduction environments: Examples from Cuba and Dominican Republic |
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Fabien Deschamps 1, 2M. Godard 2 |
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| (06/2012) |
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| Serpentinites from subduction environments represent an important sink for fluid-mobile elements. In order to constrain geochemical behavior of fluid-mobile elements hosted by serpentine phases during subduction processes, we carried out a geochemical study (trace elements and Pb isotopes) of a series of serpentinites and cumulates from the accretionary wedge of Greater Caribbean (Cuba and Dominican Republic). The trace element compositions of the primary and alteration-related phases were analyzed in situ using LA-HR-ICP-MS techniques. The studied samples represent parts of the subducted proto-Atlantic oceanic lithosphere, which has experienced low to high grade metamorphism (greenschist to eclogite facies), before being exhumed; a subset of these samples were derived from the mantle wedge. This sampling provides the opportunity to trace the chemical mobility of fluid-mobile elements during prograde metamorphism along a cold geotherm in an oceanic subduction setting. |
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| 1 : | Institut des sciences de la Terre (ISTerre) |
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CNRS : UMR5275 – IFSTTAR – Université de Savoie – Université Joseph Fourier - Grenoble I – INSU – OSUG – Institut de recherche pour le développement [IRD] : UR219 |
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| 2 : | Géosciences Montpellier (GM) |
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CNRS : UMR5243 – Université Montpellier II - Sciences et techniques |
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| 3 : | Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement (LGL-TPE) |
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CNRS : UMR5276 – INSU – Université Claude Bernard - Lyon I – École Normale Supérieure - Lyon |
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| 4 : | Department of Earth Science |
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University of Ottawa |
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| 5 : | GeoForschungsZentrum Potsdam (GFZ) |
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GFZ |
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| 6 : | Centre de recherches petrographiques et géochimiques (CRPG) |
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CNRS : UPR2300 – INSU |
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| Tectonique reliefs et bassins Géochimie 4D Vie Primitive |
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| Domaine | : | Planète et Univers/Sciences de la Terre |
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| Serpentinites – Subduction zones – Mantle wedge – Abyssal peridotites – Fluid-mobile elements |
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| hal-00720895, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00720895 | |
| oai:hal.archives-ouvertes.fr:hal-00720895 | |
| Contributeur : Marie Chebance | |
| Soumis le : Jeudi 26 Juillet 2012, 10:04:36 | |
| Dernière modification le : Jeudi 26 Juillet 2012, 10:04:36 | |
