The Role of Peridotite and Serpentinite in the Deep Carbon Cycle: Constraints from Ophiolites and Exhumed Metamorphic Terranes Navegación de entradas Mechanisms of Serpentinite Dehydration in Subduction Zones – Constraints from the Almirez Exhumed Metamorphic Terrane (Betic Cordillera, SE Spain)Magnesium and calcium carbonate and hydroxide precipitation in serpentine-hosted alkaline hydrothermal vents: Experimental and natural constraints