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Mineralogical and geochemical study of clay and calcite veins in a shear zone r...

In the Terras de Bouro area, in Northwest Portugal, the role of water-rock interaction, either by the mineralization of the sulphur spring, or by the nature of the granite secondary minerals, was studied as a complement to exploration for mineral water. This approach is justified by the peculiar mineral paragenesis found, which is very different from those of the regional weathering products. Calcite and montmo...