The aim of this work is to study the interactions processes between the flu
ids of deep origin and the shallow groundwaters of the Vulcano Porto area.
During 1995, 13 well waters were sampled three times (May, July and Novembe
r) and analysed for major and some minor elements (B, Br and NH4) and for d
issolved gases. The close relationship of these waters with the deep magmat
ic source is highlighted by the composition of the dissolved gases. Further
more, the areal distribution of dissolved species is controlled mainly by t
he gas fluxes from depth and by the presence of a deeper thermal aquifer. T
he distribution of major anomalies in the parameters measured in the ground
waters, in fact, overlaps the soil gas fluxes distribution that are related
to the existence of preferential upflow routes of fumarolic fluids through
weak structural lines in the volcanic edifice. (C) 2001 Elsevier Science B
.V. All rights reserved.