HYDROGEOLOGY AND GEOPHYSICAL INVESTIGATION OF GANAU LAKE, RANYA AREA, IRAQI KURDISTAN REGION | ||
| Iraqi Bulletin of Geology and Mining | ||
| Article 1, Volume 8, Issue 1, April 2012, Pages 1-16 | ||
| Authors | ||
| Salahalddin S. Ali; Bakhtiar Q. Aziz; Diary A.M. Al-Manmi | ||
| Abstract | ||
| The geological and hydrogeological features, which are responsible for the relatively unusual existence of a hydrogen sulphide rich lake in the broad Ranya Plain is the main endeavor of this study. The lake is located 131 Km northwest of Sulaimaniyah city on the northwestern periphery of Dokan reservoir. To investigate the basin configuration and the subsurface setting of the lake and its surrounding area, two GPR profiles were laidout using a band width (Centre Frequency) 100-MHz unshielded antenna. For penetrating more depths; as well as mapping structural and stratigraphic situations of the subsurface that couldn't be achieved by GPR survey, one dimensional resistivity sounding was carried out. Hydrochemical analysis of the water samples collected from the major lake and the surrounding smaller ones revealed that the water is of CaSO4 type, with domination of Ca and SO4 over Na and Cl. Values of δ18O and δ2H in water samples of Ganau lake, when plotted along the global meteoric water line shows that the two collected water samples from both the major and minor lakes have similar isotopic composition indicating that both of them are receiving water from the same flow zones, with diffuse recharge type. The tritium value indicates that the spring water is modern. | ||
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