Publication Date:
2017-04-04
Description:
Marked increases of CO2, H2 and He dissolved in
thermal waters and changes in the dissolved carbon
isotopic composition, were observed at Stromboli before the 28 December 2002 eruption and before a violent explosive paroxysm occurred on 5 April 2003. High anomalous CO2 flux values were recorded at the crater rim since a week before the eruption onset. The first anomalies
in the thermal waters (dissolved CO2 amount) appeared some months before the eruption, when magma column rose at a very high level in the conduit. High peaks of dissolved H2 and He were recorded a few days before the paroxysm. Carbon isotopic composition indicates a magmatic origin of the dissolved CO2 whose increase, together with those of H2 and He, is attributed to an
increasing output of deep gases likely produced by
depressurization of a rising batch of a deep gas-rich magma, whose fragments have been emitted during the explosion.
Description:
Italian Civil Protection
Description:
Published
Description:
L07620
Description:
partially_open
Keywords:
Stromboli
;
geochemical precursors
;
CO2 flux
;
pH
;
03. Hydrosphere::03.04. Chemical and biological::03.04.03. Chemistry of waters
;
03. Hydrosphere::03.04. Chemical and biological::03.04.05. Gases
;
04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring
;
05. General::05.02. Data dissemination::05.02.01. Geochemical data
;
05. General::05.02. Data dissemination::05.02.03. Volcanic eruptions
;
04. Solid Earth::04.08. Volcanology::04.08.08. Volcanic risk
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
Format:
190819 bytes
Format:
503 bytes
Format:
application/pdf
Format:
text/html
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