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Trace elements mobility in soils from the hydrothermal area of Nisyros (Greece)
Author(s)
Language
English
Obiettivo Specifico
Status
Published
JCR Journal
JCR Journal
Peer review journal
Yes
Title of the book
Issue/vol(year)
fast track 2/ 57 (2014)
ISSN
2037-416X
Issued date
2014
Alternative Location
Abstract
Nisyros Island, Greece, is a stratovolcano known for its intense hydrothermal activity. On June 2013, during a
multidisciplinary field campaign, soil samples were collected in the caldera area to determinate the main
mineralogical assemblages and to investigate the distribution of trace element concentrations and the possible
relationship to the contribution of fluids of deep origin. Soil samples were analysed with XRD and for the chemical
composition of their leachable (deionized water) and pseudo total (microwave digestion) fraction both for major and
trace 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 hydrothermal
alteration. Their very low pH values (1.9 – 3.4) show the strong impact of fumarolic gases which are probably also
the cause of strong enrichments in these soils of highly volatile elements like S, As, Se, Bi, Sb, Tl and Te.
multidisciplinary field campaign, soil samples were collected in the caldera area to determinate the main
mineralogical assemblages and to investigate the distribution of trace element concentrations and the possible
relationship to the contribution of fluids of deep origin. Soil samples were analysed with XRD and for the chemical
composition of their leachable (deionized water) and pseudo total (microwave digestion) fraction both for major and
trace 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 hydrothermal
alteration. Their very low pH values (1.9 – 3.4) show the strong impact of fumarolic gases which are probably also
the cause of strong enrichments in these soils of highly volatile elements like S, As, Se, Bi, Sb, Tl and Te.
Type
article
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