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Geochemical survey on the phreatic waters of Vulcano (Aeolian Islands, Italy)

  • A Collection Of Papers On The Geochemistry Of Volcanic Gases
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Abstract

In the frame of a geochemical surveillance survey of Vulcano, the phreatic waters, mainly from wells located at the Northern basis of the active volcanic centre, were studied over a time span of sixteen months.

On the basis of fundamental chemical composition, contamination by a shallow aquifer of brackish water and hydrothermal alteration of rocks seem the main processes to which the observed chemical picture can be attributed.

An R-mode factor analysis procedure allowed to distinguish a principal factor associated to sodium, magnesium, chloride, possibly representing the contribution of the brackish aquifer, and three minor but distinct factors. These are respectively associated to calcium and sulfate, hydrogencarbonate, boric acid, and are considered as reflecting the influence of gaseous compounds from volcanic emanations.

The variation in time of this influence appears in correlation with the variation of the observed temperature at the hottest fumaroies of the crater.

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References

  • Campagni, F., andMartini, M., 1978,Sorveglianza geochimica dei vulcani attivi. 4. Le acque freatiche di Vulcano: caratteri geochici fondamentali. C.N.R., Progetto Finalizzato Geodinamica, Pubbl. n. 108.

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Authors and Affiliations

  1. Istituto di Mineralogia, Petrografia e Geochimica, University of Florence, Italy

    M. Martini

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  1. M. Martini
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Progetto Finalizzato Geodinamica, Publ. no. 110, CNR Centro di Studio per la Mineralogia e la Geochimica dei sedimenti.

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Martini, M. Geochemical survey on the phreatic waters of Vulcano (Aeolian Islands, Italy). Bull Volcanol 43, 265–274 (1980). https://doi.org/10.1007/BF02597628

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  • DOI: https://doi.org/10.1007/BF02597628

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