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| Titel |
Preliminary results of systematic sampling of gas manifestations in geodynamically active areas of Greece |
| VerfasserIn |
Kyriaki Daskalopoulou, Walter D'Alessandro, Sergio Calabrese, Konstantinos Kyriakopoulos |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250131488
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| Publikation (Nr.) |
 EGU/EGU2016-11906.pdf |
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| Zusammenfassung |
| Greece is located on a convergent plate boundary comprising the subduction of the African
Plate beneath the Eurasian, while the Arabian plate approaches the Eurasian in a
northwestward motion. It is considered to be one of the most tectonically active regions of
Earth with a complex geodynamic setting, deriving from a long and complicated
geological history. Due to this specific geological background, conditions for the
formation of many thermal springs are favoured. In the past years, almost all the already
known sites of degassing (fumaroles, soil gases, mofettes, gas bubbling in cold and
thermal waters) located in the Hellenic area were sampled at least one time. Collected
samples were analysed for their chemical (He, Ne, Ar, O2, N2, H2, H2S, CO, CH4
and CO2) and isotopic composition (He, C and N). Some of these sites have been
selected for systematic sampling. Four of them have records longer than 10 years
with tens of samplings also considering some literature data. Two of the sites are
located in active volcanic areas (Santorini and Nisyros) while the other two are
close to actively spreading graben structures with intense seismic activity (Gulf of
Korinth and Sperchios basin). Results allowed to define long term background
values and also some interesting variation related to seismic or volcanic activity. |
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