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Tuesday, 02 February 2010 12:26 |
Impact of Structural Deformation on Uranium in Groundwater of Kamlial Formaton, Southern Potwar, Pakistan.
A total of 390 groundwater samples were collected from wells, hand pumps, bore holes, springs and seepages associated with sandstones of Kamlial Formation of Miocene age of southern Potwar covering 900 km2 of the area. The physiochemical parameters such as pH, Eh, TDS and temperature were recorded at the sampling sites. The samples were chemically analyzed for uranium, principal cations, anions and trace elements. The hydrochemical data was statistically treated with DAS and SPSS softwares.
The sandstones of the Kamlial Formation are uniformly well to very well cemented by calcite, argillaceous and iron cement. The groundwater circulation in the Formation is associated with secondary porosity and permeability, which is created by structural deformations. Diljaba, Kallar Kahar and Vasnal faults have played a key role to create secondary porosity and permeability and local change in water chemistry. Due to thrusting, the salt, marl and gypsum have enhanced the TDS concentration in the groundwater. Based on statistical treatment of hydrogeochemical data, Dhariala-Khokh Bala, Chhumbi-Kallarar Kahar, Phadial-Choa Ganj Ali Shah, Dhaeri Jabba, Sakhrah-Tandal and Dhok Awan areas contain hydrogeochemical anomalies. These hydrogeochemical anomalies are associated with secondary porosity and permeability induced by structural deformations, which enhanced water circulation and water rock interaction in Kamlial Formation.
Author(s):
Zafar Iqbal, Khursheed Alam Butt, Naseer Ali Qamar, Farrukh Mahmood and Ahmad Nabi, AEMC Lahore.
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