Publikationsdatum:
2021-06-25
Beschreibung:
We provide the first high-resolution CO2 flux data for the Neogene to Quaternary volcanic regions of the entire
Carpathian-Pannonian Region, Eastern-Central Europe, and estimate the CO2 emission of the seemingly inactive
Ciomadul volcanic complex, the youngest volcano of this area. Our estimate includes data from focused and diffuse
CO2 emissions from soil. The CO2 fluxes of focused emissions range between 277 and 8172 g d−1, corresponding
to a CO2 output into the atmosphere between 0.1 and 2.98 t per year. The investigated areas for
diffuse soil gas emissions were characterized by wide range of CO2 flux values, at Apor Baths, ranging from 1.7
× 101 to 8.2 × 104 g m−2 d−1, while at Lăzărești ranging between 1.43 and 3.8 × 104 g m−2 d−1. The highest
CO2 focused gas fluxes at Ciomadul were found at the periphery of the youngest volcanic complex, which
could be explained either by tectonic control across the brittle older volcanic edifices or by degassing from a
deeper crustal zone resulting in CO2 flux at the periphery of the supposed melt-bearing magma body beneath
Ciomadul. The estimate of the total CO2 output in the area is 8.70 × 103 t y−1, and it is consistent with other
long (N10 kyr) dormant volcanoes with similar age worldwide, such as in Italy and USA. Taking into account
the isotopic composition of the gases that indicate deep origin of the CO2 emissions, this yields further support
that Ciomadul may be considered indeed a dormant, or PAMS volcano (volcano with potentially active magma
storage) rather than an inactive one. Furthermore, hazard of CO2 outpourings has to be taken into account and
it has to be communicated to the visitors. Finally, we suggest that CO2 output of dormant volcanic systems has
to be also accounted in the estimation of the global volcanic CO2 budget.
Beschreibung:
Published
Beschreibung:
6V. Pericolosità vulcanica e contributi alla stima del rischio
Beschreibung:
JCR Journal
Schlagwort(e):
dormant volcano
;
CO2 flux Total emission
Repository-Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Materialart:
article
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