Sicily, the largest Mediterranean island (with an extension of about 25 000 km2), exhibits a very wide variety of lithologies,ranging from sedimentary to metamorphic and volcanic rocks.Principal component analysis (PCA) and hierarchical cluster analysis (HCA) have been applied to air kerma values measuredby thermoluminescent dosimetry in several sites and to data of radionuclide concentrations, geochemical and mineralogicalfeatures of rocks and soils sampled in 29 sites of Sicily to point out similarities among different lithologies. The study wasdevoted to find multiple correlations and allow a better classification of Sicilian lithotypes.Samples of rocks and soils have been analyzed by X-ray fluorescence (XRF), X-ray diffractometry (XRD), and gammarayspectrometry. Major element concentrations, mineralogical data, along with specific activities of 40K, 238U, and 232Thnatural radionuclides, have been determined in several samples. Geochemical, mineralogical and petrographic features arein good agreement with radiometric data. A survey was also performed to measure air kerma in outdoor environment usingthermoluminescent dosimeters. The measured values were compared with the predicted levels computed from the radioisotopeconcentrations present in rock and soil samples.Moreover, collected data can be used to evaluate the health impact of the natural radioactivity on the population.
|Numero di pagine||10|
|Stato di pubblicazione||Published - 2006|
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