Please use this identifier to cite or link to this item:
Authors: Aiuppa, A.* 
D'Alessandro, W.* 
Gurrieri, S.* 
Madonia, P.* 
Parello, F.* 
Title: Hydrologic and geochemical survey of the lake “Specchio di Venere” (Pantelleria island, Southern Italy)
Issue Date: 2007
Series/Report no.: / (2007)
DOI: 10.1007/s00254-007-0702-1
Keywords: Pantelleria island
volcanic lake
gas hazard
Subject Classification03. Hydrosphere::03.02. Hydrology::03.02.02. Hydrological processes: interaction, transport, dynamics 
03. Hydrosphere::03.04. Chemical and biological::03.04.03. Chemistry of waters 
04. Solid Earth::04.04. Geology::04.04.12. Fluid Geochemistry 
04. Solid Earth::04.08. Volcanology::04.08.08. Volcanic risk 
Abstract: Hydrological and geochemical studies performed on Lake Specchio di Venere on Pantelleria island (Italy) indicate that this endorheic basin has been formed through upwelling of the water table, and that it is continuously fed by the thermal springs situated on its shores. The lake is periodically stratified both thermally and in salinity, albeit this stratification is rather unstable over time since meteorological events such as strong rain or wind can determine the mixing of its waters. Periodical analyses of the lake water chemistry show large variations of the salt content due to the yearly evaporation-rain dilution cycle. These processes are also responsible for the saline stratification during steady meteorological conditions. The mineralogical characterisation of the bottom sediments shows the almost exclusive presence of neoformation minerals, mainly carbonates, formed in response to the pH gradient between spring- (pH≈6) and lake-waters (pH≈9). Finally, the CO2 partial pressures in the lake water slightly exceeding the atmospheric one, are due to the large amounts of CO2 brought to the lake through the bubbling free gas phase of the thermal springs. Nevertheless the high pH value of the lake water, its small volume and its periodical mixing prevent dangerous built up of this gas.
Appears in Collections:Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
EnvGeol.Aiuppa&al.pdfmain article639.02 kBAdobe PDFView/Open
Show full item record

Page view(s)

Last Week
Last month
checked on Jul 18, 2018


checked on Jul 18, 2018

Google ScholarTM