Interaction entre fluides de différents réservoirs lors de l'évolution d'un prisme orogénique en contexte de déformation partitionnée : les Cordillères bétiques internes (Espagne). Implications sur le transfert de métaux dans la croute

Abstract : This thesis aim at characterizing the types of fluids concerned structural levels and style of deformation. Results from Sierra Bedar point out the role played by metal-rich brines during late stages of fluid flows within the ductile crust within a domain was still isolated from surficial fluids. Brine concentration drop in the eastern Sierra Almagrera which was progressively more impacted by the major transcurrent system with volcanism and metal ore deposits. At reaching the brittle domain, quartz veins trapped surficial fluids. Soon after, quartz veins indicating the return of metamorphic fluids. Following siderite-pyrite-galena-barite veins display higher salinities and Cl/Br ratios indicate the contribution of another secondary brine coming from early Messinian evaporites. This major transcurrent tectonics clearly modified the partitioning on both sides of the brittle-ductile transition
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Vanessa Dyja. Interaction entre fluides de différents réservoirs lors de l'évolution d'un prisme orogénique en contexte de déformation partitionnée : les Cordillères bétiques internes (Espagne). Implications sur le transfert de métaux dans la croute. Sciences de la Terre. Université de Lorraine, 2014. Français. ⟨NNT : 2014LORR0029⟩. ⟨tel-01750686⟩

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