Publication Date:
2017-04-04
Description:
On 2nd/3rd November 2002, a huge amount of gas,
mainly composed of CO2, was suddenly released from the sea bottom off the coast of Panarea, producing a ‘‘crater’’20 by 10 meters wide and 7 meters deep. The gas output was estimated to be 109 l/d, two orders of magnitude higher than
that measured in the 1980s. The anomalous degassing rate lasted for some weeks, slowly decreasing to an almost constant rate of about 4 x 107 l/d after two months. The geothermo-
barometric estimations revealed an increase of both the temperature and pressure in the geothermal system feeding the sampled vents. The 3He/4He ratios were similar to those measured in nearby Stromboli. We have monitored the area for the last two decades, and based on our intensive and extensive geochemical measurements, have
ascertained that the geothermal reservoir has lost its steady state. We maintain that a new magmatic input caused these phenomena.
Description:
- Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Vesuviano,
Naples, Italy.
- Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Palermo,
Palermo, Italy.
- Dipartimento Chimica e Fisica della Terra ed Applicazioni, Palermo,
Italy.
Description:
Published
Description:
L07619
Description:
partially_open
Keywords:
Submarine degassing
;
magmatic fluids
;
04. Solid Earth::04.08. Volcanology::04.08.01. Gases
;
04. Solid Earth::04.08. Volcanology::04.08.04. Thermodynamics
;
04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring
;
05. General::05.02. Data dissemination::05.02.01. Geochemical data
;
04. Solid Earth::04.08. Volcanology::04.08.08. Volcanic risk
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
Format:
3123251 bytes
Format:
503 bytes
Format:
application/pdf
Format:
text/html
