Hydrogeological and geochemical assessments of the Gediz Graben geothermal areas, western Anatolia, Turkey

TARCAN G., GEMİCİ Ü., Aksoy N.

ENVIRONMENTAL GEOLOGY, cilt.47, sa.4, ss.523-534, 2005 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 47 Sayı: 4
  • Basım Tarihi: 2005
  • Doi Numarası: 10.1007/s00254-004-1174-1
  • Dergi Adı: ENVIRONMENTAL GEOLOGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.523-534
  • Anahtar Kelimeler: Gediz Graben, thermomineral waters, geothermal systems, water geochemistry, mineral saturation, boron problem, WATERS
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

Gediz Graben is an important area for geothermal activity in Turkey. Menderes Massif rocks consisting of gneisses, schists, marbles and granodiorite, comprise the aquifers of the geothermal systems. Neogene terrestrial sediments made up mainly of sandy and clayey conglomerates cap the systems. Gediz Graben geothermal areas are physically divided into seven main groups: Turgutlu-Urganli, Sart-Camur, Caferbeyli, Ufuruk, Kurs unlu, Kavaklidere-Sazdere and Alas ehir geothermal areas. The third highest aquifer in Turkey temperature (182 degreesC) after Kizildere (242 degreesC) and Germencik (232 degreesC) was discovered in the Kavaklidere-Sazdere area. The thermomineral waters of the Gediz Graben geothermal areas have outlet temperatures of 25 95 degreesC and an electrical conductivity of 874-6020 muS/cm. Mineralization is mostly dominated by Na+ (188-2027 ppm) and HCO3- (544-2950 ppm). Kavaklidere-Sazdere area shows the highest boron content among the entire geothermal aquifers of Turkey. Major geochemical processes for thermomineral waters are carbonate and silicate dissolution and mixing.