Natural radioactivity distribution and gamma radiation exposure of beach sands close to Maronia and Samothraki plutons, NE Greece

Pages: 
pp. 99-107
Department of Mineralogy, Petrology and Economic Geology, School of Geology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
Department of Mineralogy, Petrology and Economic Geology, School of Geology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
Department of Mineralogy, Petrology and Economic Geology, School of Geology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
Laboratory of Nuclear Physics, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
Abstract: 

This study aims to evaluate the activity concentrations of 238U, 226Ra, 232Th, 228Th and 40K along the beaches of Maronia and Samothraki being adjacent to the local granitoids. These range from 14-75, 17.5-114.8, 23.7-71.9, 24.5-71.6 and 262-1319 Bq/kg, respectively. The (wt.%) of heavy magnetic (HM) (amphibole, epidote, clinopyroxene, chlorite, magnetite and ilmenite) fraction, the heavy non-magnetic (HNM) (zircon and titanite) fraction, and the total heavy fraction (TH), were correlated with the concentrations of the measured radionuclides in the bulk samples. The measured radionuclides in the beach sands were normalized to the respective values measured in the granitic rocks, which are their most probable parental rocks, so as to provide data upon their enrichment or depletion. The annual effective dose varies between 0.004 and 0.013 mSv y-1 for tourists and from 0.016 to 0.056 mSv y-1 for local people working on the beach.

Keywords: 

natural radioactivity, beach sands, granitic rocks, heavy magnetic and non-magnetic fractions, annual effective dose equivalent, NE Greece

VOLUME 43 (1-3)/December 2014

Sofia University “St. Kliment Ohridski”, 15 Tsar Osvoboditel Blvd., 1504 Sofia
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Sofia University “St. Kliment Ohridski”, 15 Tsar Osvoboditel Blvd., 1504 Sofia

Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, Bl. 24, 1113 Sofia; Bulgaria
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Geological Institute, Bulgarian Academy of Sciences, Sofia, Bulgaria
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Geological Institute, Bulgarian Academy of Sciences, Sofia, Bulgaria
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Saint-Petersburg State University, Saint Petersburg, Russia

National Institute of Marine Geology and Geoecology, 23-25 Dimitrie Onciul St., sector 2, Bucharest, Romania
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National Institute of Marine Geology and Geoecology, 23-25 Dimitrie Onciul St., sector 2, Bucharest, Romania

Department of Mineralogy, Petrology and Economic Geology, School of Geology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
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Department of Mineralogy, Petrology and Economic Geology, School of Geology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
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Department of Mineralogy, Petrology and Economic Geology, School of Geology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
|
Laboratory of Nuclear Physics, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece