Publication Date:
2019-01-09
Description:
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.
Description:
Published
Description:
2SR. VULCANI - Servizi e ricerca per la Società
Description:
JCR Journal
Description:
open
Keywords:
Trace elements
;
Hydrothermal alteration
;
01. Atmosphere::01.01. Atmosphere::01.01.07. Volcanic effects
;
03. Hydrosphere::03.04. Chemical and biological::03.04.06. Hydrothermal systems
;
04. Solid Earth::04.02. Exploration geophysics::04.02.01. Geochemical exploration
;
04. Solid Earth::04.04. Geology::04.04.12. Fluid Geochemistry
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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