ISOTOPIC AND HYDROCHEMICAL PROPERTIES OF HOT AND MINERALIZED WATERS IN SW KONYA GEOTHERMAL FIELD (TURKEY)

摘要

The study area is located at southwest part of Konya (Central Anatolia). The basement formation of the area is ?altepe, deposited from Early Cambrian through Middle Cambrian. Seydi ? ehir Formation which is composed of alternating slate, sandstone and metasandstone overlies conformably the overthrown ?altepe Formation and is Upper Cambrian-Lower Ordovician in age. Seydi?ehir Formation is conformably underlined by Neocene in age Taras?i Limestone. Alluvium is Quaternary-Present in age. The hot and mineralized waters located in the study area around Il?catepe and Kavakk?y villages have a temperature range between 31°C and 46°C, fl ow rate between 1.42 and 5 L/s and a total dissolved mineral between 2218–3500 mg/L. Aquifer of these waters are the porous limestone and dolomitic limestone of the ?altepe formation. The travertine cones occur as a result of water activity. The waters classifi ed according to the AIH standards are Ca, Na, HCO3 , and B bearing hot and mineralized water. The oxygen and hydrogen isotope compositions of geothermal waters reveal meteoric origin. They have more negative δ18O and δ2H values, and lower 3H contents compared to cold waters. The geothermal water aquifers are recharged from higher altitudes and are hardly affected by recent precipitations.