Water-rock Interaction Ascribed to Hyperalkaline Mineral Waters in the Cabeço de Vide Serpentinized Ultramafic Intrusive Massif (Central Portugal)
| Autor: | Carla Sofia Almeida Rocha, Steve Vance, Giuseppe Etiope, Paula M. Carreira, Maria O. Neves, José M. Marques, Ana Z. Miller, Lance E. Christensen, Shino Suzuki |
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| Rok vydání: | 2017 |
| Předmět: |
geography
Mineral geography.geographical_feature_category 010504 meteorology & atmospheric sciences Pluton Geochemistry Earth and Planetary Sciences(all) Metamorphism General Medicine Massif 010502 geochemistry & geophysics 01 natural sciences Residuum Mineral water Ultramafic rock Mafic Geology 0105 earth and related environmental sciences |
| Zdroj: | Procedia Earth and Planetary Science. 17:646-649 |
| ISSN: | 1878-5220 |
| DOI: | 10.1016/j.proeps.2016.12.173 |
| Popis: | The conceptual model of Cabeco de Vide mineral waters, issuing at the contact metamorphism zone developed by the local mafic/ultramafic pluton, is described. These mineral waters discharge with a temperature between 17 and 20°C, show a very alkaline pH (up to 11.8), and have: Na-Cl/Ca-OH facies; dry residuum ≈ 200mg/L; Ctotal < 3.0mg/L; and extremely low Mg2+ and silica concentrations (< 0.3 and 6.5mg/L, respectively). CH4 isotopic composition (-24.4 o/oo < δ13C-CH4 < -14.0 o/oo and -285 o/oo < δ2H-CH4 < -218 o/oo) falls in the range of typical abiotic gas. In the case of Cabeco de Vide mineral waters, the understanding of the resource will help to preserve the mineral water quality, creating public interest. |
| Databáze: | OpenAIRE |
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