Open AccessTrace elements mobility in soils from the hydrothermal area of Nisyros (Greece)
Author(s) -
Kyriaki Daskalopoulou,
Stefano Calabrese,
Silvia Milazzo,
L. Brusca,
S. Bellomo,
W. D’Alessandro,
K. Kyriakopoulos,
Franco Tassi,
Francesco Parello
Publication year - 2015
Publication title -
annals of geophysics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 60
eISSN - 2037-416X
pISSN - 1593-5213
DOI - 10.4401/ag-6623
Subject(s) - geology , paragenesis , soil water , hydrothermal circulation , geochemistry , impact crater , caldera , crater lake , trace element , biogeochemical cycle , mineralogy , volcano , soil science , environmental chemistry , chemistry , paleontology , physics , astronomy , metamorphic rock
Nisyros Island, Greece, is a stratovolcano known for its intense hydrothermal activity. On June 2013, during amultidisciplinary field campaign, soil samples were collected in the caldera area to determinate the mainmineralogical assemblages and to investigate the distribution of trace element concentrations and the possiblerelationship to the contribution of fluids of deep origin. Soil samples were analysed with XRD and for the chemicalcomposition of their leachable (deionized water) and pseudo total (microwave digestion) fraction both for major andtrace elements. The results allow to divide the samples in 2 groups: Lakki Plain and Stefanos Crater. The latter,where a fumarolic area is located, shows a mineralogical assemblage dominated by phases typical of hydrothermalalteration. Their very low pH values (1.9 – 3.4) show the strong impact of fumarolic gases which are probably alsothe cause of strong enrichments in these soils of highly volatile elements like S, As, Se, Bi, Sb, Tl and Te