Natural radioactivity levels in granitic plutons and groundwaters in Southeast part of Eskisehir, Turkey

Y. Örgün*, N. Altinsoy, A. H. Gültekin, G. Karahan, N. Çelebi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

109 Citations (Scopus)


The present work investigated the radioactivity level of the granitoid plutons and its effect on the groundwaters in the southeast part of Eskisehir. Fourteen granitic samples from the Kaymaz and Sivrihisar plutons and 11 groundwater samples from the near vicinity of the pluton were analyzed. The activity concentrations measured for 238U and 232Th ranged from 43.59±2 to 651.80±24 Bq/kg, and 51.16±3 to 351.94±13 Bq/kg, respectively. The activity concentrations obtained for 40K varied from 418.50±17 to 1618.03±66 Bq/kg. The absorbed dose rates in air outdoors ranged from 87.14 to 531.81 nGy/h. All the results obtained from the Kaymaz pluton are higher than those from the Sivrihisar. The U (ave. 16.6 ppm) and Th (ave. 49.9 ppm) values of the Kaymaz pluton are higher than the average concentrations of the magmatic rocks of granitic composition. These results are consistent with high dose rates of the pluton. The gross-α activities in the groundwater samples ranged from 0.009 to 1.64 Bq/l and the gross-β activities from 0.006 to 0.89 Bq/l. The highest gross-α value was found in the sample taken from near the Kaymaz pluton. The concentrations of 222Rn varied from 0.060 to 0.557 Bq/l.

Original languageEnglish
Pages (from-to)267-275
Number of pages9
JournalApplied Radiation and Isotopes
Issue number2
Publication statusPublished - Aug 2005


Scientific Research Projects Unite of Istanbul Technical University (ITU) supported this study.

FundersFunder number
Istanbul Teknik Üniversitesi


    • Eskisehir
    • Gamma dose
    • Granitic pluton
    • Gross alfa and gross beta
    • Groundwaters
    • Natural radioactivity
    • Radium equivalent activity
    • U and Th content


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