Geochemical monitoring of the seismic activities and noble gas characterization of the geothermal fields along the eastern segment of the büyük menderes graben

Süer, Selin
This study aims the real-time monitoring of gases (CO2, N2, O2, H2, H2S, CH4, He, Ar) discharging from natural pools in the Tekke Hamam geothermal field (Denizli) in addition to the geochemical characterization of the field along with the Kızıldere geothermal field, both located at the eastern segment of the Büyük Menderes Graben. The continuous gas monitoring experiment (November 2007-October 2008) conducted in the Tekke Hamam geothermal field has revealed temporal variations in the gas compositions, gas flow rate and pool temperature. Different variation components, such as daily variation profiles and peak/Multi-day signals, are detected in the monitored data, which are mainly correlated with shallow and deep processes involving mainly meteorological factors and seismicity induced variations, respectively. Particularly, the coupled variations in the gas compositions and flow rate seem to correlate with seismicity induced permeability modifications within the subsurface during the absence of significant meteorological factors, such as high rainfall and varying atmospheric pressure. The noble gas characterization of the fields have revealed both high 3He/4He and 4He/20Ne isotopic ratios, suggesting a mantle contribution of about 18% for Kızıldere and 34% for Tekke Hamam, whereas the other noble gases (Ar, Ne, Kr, Xe) are of atmospheric nature. The different mantle contributions observed in both fields can suggest a different mantle-He flux variably contaminated by crustal helium. The chemical (cation-trace element-anion) and stable isotopic (δ18O-δD) contents of the thermal waters reveal high temperature water-rock interaction accompanied by the effects of deep origined gases (mainly CO2 and H2S) discharging from the fields.


Büyük Menderes Grabeninin doğu kesiminde sismik etkinliklerin jeokimyasal olarak işlenmesi ve jeotermal sahaların asal gaz karakterizasyonu
Erzınger, Joerg; Güleç, Nilgün Türkan; Parlaktuna, Mahmut; Pıpke, Lippmann Johanna; Bozkurt, Erdin; Wıersberg, Thomas; Süer, Selin(2009)
Proje çalışması, Büyük Menderes Grabeninin doğu kesiminde konumlanan Tekke Hamam ve Kızıldere jeotermal sahalarının asal gaz karakterizasyonu ile Tekke Hamam sahasındaki gaz çıkışlarının gerçek-zamanlı izlenmesine odaklı bir araştırmadır. Jeotermal sahalardaki akışkanların hidrojeokimyasal özellikleri ve duraylı izotop (δ18O, δD) bileşimleri de, diğer araştırma bulgularını bütünleyici olarak, proje kapsamında ele alınmıştır. Sahaların asal gaz karakterizasyonu, yüksek 3He/4He ve 4He/20Ne i...
Hydrogeochemical outline of thermal waters and geothermometry applications in Anatolia (Turkey)
Mutlu, Halim; Güleç, Nilgün Türkan (Elsevier BV, 1998-10-01)
The chemical compositions of a total of 120 thermal water samples from four different tectonically distinct regions (Central, North, East and West Anatolia) of Turkey are presented and assessed in terms of geothermal energy potential of each region through the use of chemical geothermometers. Na-Ca-HCO3, type waters are the dominant water types in all the regions except that Na-Cl type waters are typical for the coastal areas of West Anatolia and for a few inland areas of West and Central Anatolia where dee...
Investigation of the recharge and discharge mechanisms of a complex aquifer system by using environmental isotopes and noble gases
Arslan, Şebnem; Yazıcıgil, Hasan; Department of Geological Engineering (2008)
This study aims to determine the recharge, discharge and the mixing mechanisms of a complex aquifer system located above the Kazan trona ore field using the environmental isotopes of deuterium, oxygen-18, carbon-13 and carbon-14, chlorofluorocarbons (CFC- 11, CFC-12 and CFC-113) and the noble gas isotopes (He, Ne, Ar, Kr and Xe). The groundwater system consists of three different aquifers: shallow, middle and deep. The Akpınar formation lying between deep and middle systems acts as an aquitard. Oxygen-18 an...
Mineralogical, petrographical and geochemical properties of zeolite bearing tuffs in nw Anatolia (Turkey)
Özen, Sevgi; Göncüoğlu, Mehmet Cemal; Department of Geological Engineering (2008)
The purpose of this study is to understand the geological, petrographical, mineralogical and geochemical characteristics of analcime-bearing tuffs in the Biga Peninsula and to determine formation process of these tuffs. The study area lies between Ayvacık and Küçükkuyu. The rock units are pre-Eocene basement rocks, Miocene Behram Volcanics (Arıklı Tuff, andesite, andesitic agglomerate), Pliocene volcanics, Miocene lacustrine sediments (Küçükkuyu Formation) and Quaternary alluvium. Analcimes which are found ...
Hydrogeochemical characterization and conceptual modeling of the Edremit geothermal field (NW Turkey)
Avşar, Özgür; Güleç, Nilgün Türkan; Parlaktuna, Mahmut (Elsevier BV, 2013-07-15)
The Edremit geothermal field, with 42-62 degrees C discharge temperatures, is utilized for space heating. Alternation of permeable and impermeable units created two superimposed aquifers in the area: an upper unconfined and a lower confined. Water samples from 21 (hot-cold) wells were taken in this study. 8 of these wells penetrate the deeper confined aquifer, while 13 penetrate the shallower unconfined aquifer. Geochemical analyses revealed that Na + K - SO4 (>40 degrees C), Ca - HCO3 (<30 degrees C) and C...
Citation Formats
S. Süer, “Geochemical monitoring of the seismic activities and noble gas characterization of the geothermal fields along the eastern segment of the büyük menderes graben,” Ph.D. - Doctoral Program, Middle East Technical University, 2010.