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Gas hazard assessment at the Monticchio crater lakes of Mt. Vulture, a volcano in Southern Italy
Author(s) -
Caracausi Antonio,
Nuccio P. Mario,
Favara Rocco,
Nicolosi Marco,
Paternoster Michele
Publication year - 2009
Publication title -
terra nova
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.353
H-Index - 89
eISSN - 1365-3121
pISSN - 0954-4879
DOI - 10.1111/j.1365-3121.2008.00858.x
Subject(s) - impact crater , ejecta , geology , volcano , maar , vulture , crater lake , geochemistry , diatreme , volcanic gases , paleontology , astrobiology , physics , quantum mechanics , supernova , kimberlite , mantle (geology)
Abstract Geochemical investigations have shown that there is a considerable inflow of gas into both crater lakes of Monticchio, Southern Italy. These lakes are located in two maars that formed 140 000 years ago during Mt. Vulture volcano’s last eruptive activity. Isotopic analyses suggest that CO 2 and helium are of magmatic origin; the latter displays 3 He/ 4 He isotope ratios similar to those measured in olivines of the maar ejecta. In spite of the fact that the amount of dissolved gases in the water is less than that found in Lake Nyos (Cameroon), both the results obtained and the historical reports studied indicate that these crater lakes could be highly hazardous sites, even though they are located in a region currently considered inactive. This could be of special significance in very popular tourist areas such as the Monticchio lakes, which are visited by about 30 000 people throughout the summer, for the most part on Sundays.