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Published January 1, 2014 | Version v1
Journal article Open

Origin and interactions of fluids circulating over the Amik Basin (Hatay, Turkey) and relationships with the hydrologic, geologic and tectonic settings

Creators

  • 1. Hacettepe Univ, Dept Geol Engn, Hydrogeol Div, TR-06800 Ankara, Turkey
  • 2. Ist Nazl Geofis & Vulcanol, Sez Palermo, I-90146 Palermo, Italy
  • 3. Istanbul Tech Univ, Fac Min, Dept Geol Engn, TR-34469 Istanbul, Turkey
  • 4. Eskisehir Osmangazi Univ, Dept Geol Engn, TR-26480 Eskisehir, Turkey
  • 5. Middle E Tech Univ, Dept Geol Engn, TR-06531 Ankara, Turkey
  • 6. Natl Taiwan Univ, Dept Geosci, Taipei 106, Taiwan
  • 7. Acad Sinica, Inst Earth Sci, Taipei, Taiwan
  • 8. Natl Ctr Res Earthquake Engn, Taipei 106, Taiwan

Description

We investigated the geochemical features of the fluids circulating over the Amik Basin (SE Turkey-Syria border), which is crossed by the Northern extension of the DSF (Dead Sea Fault) and represents the boundary area of three tectonic plates (Anatolian, Arabian and African plates). We collected 34 water samples (thermal and cold from natural springs and boreholes) as well as 8 gas samples (bubbling and gas seepage) besides the gases dissolved in the sampled waters. The results show that the dissolved gas phase is a mixture of shallow (atmospheric) and deep components either of mantle and crustal origin. Coherently the sampled waters are variable mixtures of shallow and deep ground waters, the latter being characterised by higher salinity and longer residence times. The deep groundwaters (from boreholes deeper than 1000 m) have a CH4-dominated dissolved gas phase related to the presence of hydrocarbon reservoirs. The very unique tectonic setting of the area includes the presence of an ophiolitic block outcropping in the westernmost area on the African Plate, as well as basalts located to the North and East on the Arabic Plate.

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