Exhumation history of two high-pressure belts, northern Venezuela, based on fluid inclusions in quartz and calcite veins
Published:January 01, 2005
Virginia B. Sisson, Rebecca Kessler Cardoso, Caren Chaika Harris, Saijin Huang, Layla M. Unger, 2005. "Exhumation history of two high-pressure belts, northern Venezuela, based on fluid inclusions in quartz and calcite veins", Caribbean-South American plate interactions, Venezuela, Hans G. Avé Lallemant, Virginia B. Sisson
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Two metamorphic belts in northern Venezuela were metamorphosed at high pressure–low-temperature conditions in a Cretaceous subduction zone. Both belts, the Cordillera de la Costa and Villa de Cura, contain several generations of quartz ± calcite veins that formed during two stages of orogenic development. The first stage encompasses five generations of ductile deformation structures. This was followed by at least two generations of brittle deformation. Quartz veins related to the different deformations contain several types of fluid inclusions. Most are two-phase with an aqueous NaCl-H2O solution. Texturally early fluid inclusions show a wide range of homogenization temperatures with...