Publication Date:
2020-02-24
Description:
Measurements of 220Rn and 222Rn activity and of CO2 flux in soil and fumaroles were carried out on
Mount Etna volcano in 2005–2006, both in its summit area and along active faults on its flanks. We
observe an empirical relationship between (220Rn/222Rn) and CO2 efflux. The higher the flux of CO2, the
lower the ratio between 220Rn and 222Rn. Deep sources of gas are characterized by high 222Rn activity and
high CO2 efflux, whereas shallow sources are indicated by high 220Rn activity and relatively low CO2
efflux. Excess 220Rn highlights sites of ongoing shallow rock fracturing that could be affected by collapse,
as in the case of the rim of an active vent. Depletion both in 220Rn and in CO2 seems to be representative of
residual degassing along recently active eruptive vents.
Description:
This work was funded by the Istituto Nazionale di
Geofisica e Vulcanologia (S.G., M.N.) and by the Dipartimento
per la Protezione Civile (Italy), projects V3_6/28-Etna
(M.N.) and V5/08-Diffuse degassing in Italy (S.G.), and NSF
EAR 063824101 (K.W.W.S.).
Description:
Published
Description:
Q10001
Description:
1.2. TTC - Sorveglianza geochimica delle aree vulcaniche attive
Description:
4.5. Degassamento naturale
Description:
JCR Journal
Description:
reserved
Keywords:
radon
;
thoron
;
carbon dioxide
;
rock stress
;
gas transport
;
Mount Etna
;
04. Solid Earth::04.08. Volcanology::04.08.99. General or miscellaneous
;
04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring
;
05. General::05.02. Data dissemination::05.02.01. Geochemical data
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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