NissirosV1, Main, Exploration, bibRecord, 000262

Isotope and chemical assessment of geothermal potential of Kos Island, Greece

Identifieur interne : 000262 ( Main/Exploration ); précédent : 000261; suivant : 000263

Isotope and chemical assessment of geothermal potential of Kos Island, Greece

Auteurs : Giorgia La Ruffa [Italie] ; Costanzo Panichi [Italie] ; Teodoro Kavouridis [Grèce] ; Vera Liberopoulou [Grèce] ; Joannis Leontiadis [Grèce] ; Antonio Caprai [Italie]

Source :

Geothermics [ 0375-6505 ] ; 1998.

RBID : ISTEX:844E2E052AC7883798BC9AEC16195004A5C58134

English descriptors

Abstract

Abstract: The island of Kos is located in the southern part of the Aegean volcanic arc. Between 1991 and 1993, water and gas samples were collected from cold and thermal springs and from several water drill-holes. The maximum surface temperature of 45°C is associated with Fokas spring water, which consists of a seawater modified by interaction with sedimentary rocks in the NW part of the island. Two distinct groundwater circulations develop in the sedimentary and volcanic rocks; these are meteoric waters dominated by HCO3 ions that have ions formed by interaction with the calcite present in the rocks as primary or secondary mineral. Addition of CO2 from an external source to the groundwaters locally leads to the formation of aggressive waters and a water rock interaction characterised by the leaching of CaSO4 and partial attain- ment of mineral:fluid equilibrium. The gas compositions suggest the presence, at depth, of a CO2 -producing high-temperature system in its waning stage. On the basis of chemical solute geothermometry, temperatures higher than 110°C appear unlikely at relatively shallow depths.

Url:

https://api.istex.fr/document/844E2E052AC7883798BC9AEC16195004A5C58134/fulltext/pdf

DOI: 10.1016/S0375-6505(99)00004-8

Affiliations:

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Le document en format XML

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<term>Aggressive waters</term>
<term>Aghia fokas</term>
<term>Bicarbonate waters</term>
<term>Calcite</term>
<term>Chemical assessment</term>
<term>Chemical composition</term>
<term>Convergent plate boundaries</term>
<term>Eastern part</term>
<term>Elsevier science</term>
<term>External source</term>
<term>Fokas</term>
<term>Geothermal</term>
<term>Geothermal activity</term>
<term>Geothermal exploration</term>
<term>Geothermics</term>
<term>Giggenbach</term>
<term>Gypsum</term>
<term>Hco2</term>
<term>Hco2 ions</term>
<term>Heavy isotopes</term>
<term>Igme</term>
<term>International symposium</term>
<term>Isotope</term>
<term>Isotopic</term>
<term>Isotopic composition</term>
<term>Isotopic compositions</term>
<term>Isotopic concentration</term>
<term>Local seawater composition</term>
<term>Maximum surface temperature</term>
<term>Meteoric</term>
<term>Meteoric waters</term>
<term>October</term>
<term>Original seawater</term>
<term>Other hand</term>
<term>Other samples</term>
<term>Quartz solubility</term>
<term>Relative concentrations</term>
<term>Ruffa</term>
<term>Seawater</term>
<term>Sedimentary</term>
<term>Sedimentary rocks</term>
<term>Spring water</term>
<term>Spring waters</term>
<term>Sulfur</term>
<term>Thermal springs</term>
<term>Thermal water</term>
<term>Thermal waters</term>
<term>Underground circulation</term>
<term>Underground waters</term>
<term>Volcania</term>
<term>Volcania area</term>
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<term>Isotopic composition</term>
<term>Isotopic compositions</term>
<term>Isotopic concentration</term>
<term>Local seawater composition</term>
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<front><div type="abstract" xml:lang="en">Abstract: The island of Kos is located in the southern part of the Aegean volcanic arc. Between 1991 and 1993, water and gas samples were collected from cold and thermal springs and from several water drill-holes. The maximum surface temperature of 45°C is associated with Fokas spring water, which consists of a seawater modified by interaction with sedimentary rocks in the NW part of the island. Two distinct groundwater circulations develop in the sedimentary and volcanic rocks; these are meteoric waters dominated by HCO3 ions that have ions formed by interaction with the calcite present in the rocks as primary or secondary mineral. Addition of CO2 from an external source to the groundwaters locally leads to the formation of aggressive waters and a water rock interaction characterised by the leaching of CaSO4 and partial attain- ment of mineral:fluid equilibrium. The gas compositions suggest the presence, at depth, of a CO2 -producing high-temperature system in its waning stage. On the basis of chemical solute geothermometry, temperatures higher than 110°C appear unlikely at relatively shallow depths.</div>
</front>
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Isotope and chemical assessment of geothermal potential of Kos Island, Greece

Isotope and chemical assessment of geothermal potential of Kos Island, Greece

Source :

English descriptors

Abstract

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