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The distribution of 226Ra, 232Th, and 40K in 70 granite samples obtained from 13 Western Anatolian plutons (Turkey) was measured by using γ-ray spectroscopy. The activities of the measured radionuclides varied up to 259 Bq kg–1 for 226Ra, up to 241 Bq kg–1 for 232Th, and up to 2518 Bq kg–1 for 40K, with mean values of 66 (±44), 90 (±47), and 1097 (±410) Bq kg–1, respectively, which are smaller than the mean values given for granites worldwide.
Turkish Journal of Earth Sciences Turkish J Earth Sci (2016) 25: 434-455 © TÜBİTAK doi:10.3906/yer-1605-4 http://journals.tubitak.gov.tr/earth/ Research Article Distribution of natural radioactivity and assessment of radioactive dose of Western Anatolian plutons, Turkey 1, 2 Argyrios PAPADOPOULOS *, Şafak ALTUNKAYNAK , Antonios KORONEOS , Alp ÜNAL , Ömer KAMACI Department of Mineralogy, Petrology and Economic Geology, School of Geology, Aristotle University of Thessaloniki, Thessaloniki, Greece Department of Geological Engineering, Faculty of Mines, İstanbul Technical University, Maslak, İstanbul, Turkey Received: 10.05.2016 Accepted/Published Online: 28.06.2016 Final Version: 24.10.2016 Abstract: The distribution of 226Ra, 232Th, and 40K in 70 granite samples obtained from 13 Western Anatolian plutons (Turkey) was measured by using γ-ray spectroscopy. The activities of the measured radionuclides varied up to 259 Bq kg–1 for 226Ra, up to 241 Bq kg–1 for 232Th, and up to 2518 Bq kg–1 for 40K, with mean values of 66 (±44), 90 (±47), and 1097 (±410) Bq kg–1, respectively, which are smaller than the mean values given for granites worldwide The mean value of the increase on the external γ-radiation effective dose rate is 0.21 (±0.09) mSv year–1, varying by