| Title | Stable Isotope and Elemental Chemistry of Mt. Sabalan Geothermal Field, Ardebil Province of North West Iran |
|---|---|
| Authors | S. Porkhial, M.M. Ghomshei, Parisa Yousefi |
| Year | 2010 |
| Conference | World Geothermal Congress |
| Keywords | Sabalan, Iran, stable Isotope, geochemistry |
| Abstract | Sabalan Geothermal Project is located in North West of Iran in the Province of Ardebil. Hot springs in the area have been used by local population from ancient times, and are considered as sacred, giving the region the name “Dashe Moghan (Magi’s Plane). Three deep exploratory holes were drilled in 2003 and 2004 by the Renewable Energy Organization of Iran (SUNA) to a maximum depth 3200m, where temperatures higher than 240°C were encountered. Two of the wells did show sustained flow with a total power capacity of 6 MW. Connection of deep geothermal fluids and local hot springs are investigated in this paper through analysis of major ions and stable isotopes in hot springs and deep thermal waters. Constant elemental ratios show that local hot springs are chemically linked to the deep reservoir waters through concentration-dilution processes (such as steam loss and mixing with surface waters). δ18O values of Sabalan thermal waters are between -8 to 12 and δD values range between -60 and -80. Isotopically thermal waters appear are connected to local meteoric waters by a relatively small oxygen-shift. |