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Geochemical processes affecting the composition of mineral waters in the South Portuguese Zone, Portugal

机译：影响葡萄牙南葡萄牙区矿泉水组成的地球化学过程

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摘要

The Iberian Pyrite Belt is an important sector of the southernmost geostructural domain of the Iberian Peninsula Palaeozoic Massif, the South Portuguese Zone (SPZ). It is composed of metamorphic rocks of volcano-sedimentary origin, overlain by metasediments of the mertola Formation, both formed in a submarine environment. In this sector, several highly mineralised sulphide water occurs, having all a Na-Cl matrix. In order to evaluate the geochemical processes affecting the composition of these waters, forward and inverse geochemical modelling were used. The results show that the final composition could be the result of water/rock interaction of meteoric water with the following phases: calcite, dolomite, pyrite, goethite, NaCl, CO_2 gas and cationic exchange. Minerals like calcite, dolomite, pyrite and NaCl are dissolving in an open system, as indicated by the large amounts of O_2 consumed during the evolution, accompanied by the precipitation of goethite.
机译：伊比利亚黄铁矿带是南葡萄牙区（SPZ）的伊比利亚半岛古生代古生代宫中最南端地球岩域的重要部门。它由火山沉积原产地的变质岩组成，覆盖在潜艇环境中的Mertola形成的偏离。在该部门中，发生几种高度矿化的硫化物水，具有所有Na-Cl基质。为了评估影响这些水的组成的地球化学过程，使用前进和逆地球化学建模。结果表明，最终组合物可以是流水与以下阶段的水/岩石相互作用的结果：方解石，白云岩，黄铁矿，霉矿，NaCl，CO_2气体和阳离子交换。如方解石，白云石，黄铁矿和NaCl等矿物质在开放系统中溶解，如在进化期间消耗的大量O_2所示，伴随着粘散的沉淀。

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