http://www.cnr.it/ontology/cnr/individuo/prodotto/ID29580
Fluid geochemistry of the Chios geothermal area, Chios island, Greece. (Articolo in rivista)
- Type
- Label
- Fluid geochemistry of the Chios geothermal area, Chios island, Greece. (Articolo in rivista) (literal)
- Anno
- 2006-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1016/j.jvolgeores.2006.02.013 (literal)
- Alternative label
Dotsika E., Leonteadis I., Poutoukis D. Cioni R., Raco B. (2006)
Fluid geochemistry of the Chios geothermal area, Chios island, Greece.
in Journal of volcanology and geothermal research
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- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Dotsika E., Leonteadis I., Poutoukis D. Cioni R., Raco B. (literal)
- Pagina inizio
- Pagina fine
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
- http://www.journals.elsevier.com/journal-of-volcanology-and-geothermal-research/ (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
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- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- National Center for Scientific Research \"Demokritos\", I.M.S., 15310 Aghia Paraskevi Attikis, Greece
Efessou 41, 17121, Nea Smyrni, Greece
General Secretariat for Research and Technology, Mesogion 14-18, 11510 Athens, Greece
Instituto di Geoscienze e Georisorse, C.N.R., 56124 Pisa, Italy (literal)
- Titolo
- Fluid geochemistry of the Chios geothermal area, Chios island, Greece. (literal)
- Abstract
- Two separate aquifers have been identified in Chios Island. The first one, Nenita, is found in the southern part of the island and
the other one, Aghiasmata and Aghia Markela, in the northern part, which is characterized by high salinity waters. Chemical and
isotopic contents were used for the investigation of the origin and evolution of thermal water in sedimentary and volcanic rocks, for
the estimation of the mixing process between meteoric and seawater involved in the deep geothermal systems and for the
evaluation of the deep aquifer temperature.
The hot borehole and spring waters discharging in Chios Island, Greece, change in composition from earth-alkaline-
bicarbonate-type to alkaline-type chloride. The chemical and physical characteristics of bicarbonate well waters show interaction
between meteoric waters and Neocene rocks. In general, for these waters as their mineralization increases the Mg2+ contents
increase. The deuterium and oxygen contents of these water samples indicate a meteoric origin.
The Na+ and Cl- ions dominate the chemistry of the thermal waters of Aghia Eleni spring. This thermal water appears to be a
mixture of seawater and ground water. The marine contribution for this sample is 80-89%. The chemical and isotopic data of the
thermal Cl-rich water springs of the northern part of the island, Aghiasmata and Aghia Markela, suggest that they are fed by
thermal water mixed with local groundwater and seawater respectively. The parent geothermal liquid is either a mixture mad up of
local groundwater (~40%) and arc-type magmatic water (~60%), that did not exchange oxygen isotopes, or a mixture constituted
by local groundwater (~70%) and seawater (~30%), which experienced a significant oxygen isotope exchange. Assessments from
chemical and isotopic geothermometer applied on the thermal waters springs suggest the probable existence of a deep geothermal
reservoir of middle-high enthalpy (220 °C) in the northern (Aghiasmata and Aghia Markela) part of the island and low enthalpy
(80 °C) in the southern part (Nenita-Patrika-Thimiana) of the island. (literal)
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