Cancer Risk Assessment and Geochemical Features of Granitoids at Nikeiba, Southeastern Desert, Egypt

Different rock types (syenogranite, alkali feldspar granite and quartz syenite intruded by microgranite dikes veins) were investigated in the Nikeiba region Egypt. The main components of studied intrusive rocks, comprised granites syenite, are plagioclase, amphibole, biotite, K-feldspar different proportions. Ground gamma ray measurements show that syenogranite, have highest radioactivity (K, eU, eTh their ratios) comparison with granite. Geochemically, enriched large-ion lithophile elements (LILE; Ba, Rb, Sr) high field-strength (HFSE; Y, Zr Nb), but decreased Ce, reflecting alkaline affinity. These rocks reveal calc–alkaline affinity, metaluminous characteristics, A-type post-collision geochemical signatures, which indicates emplacement within-plate environments under an extensional regime. U Th increased syenogranite whereas shows a marked decrease Th. average values AU (131 ± 49 Bq·kg−1), ATh (164 35) AK (1402 239) samples higher than recommended worldwide average. levels found result alteration radioactive carrying minerals inside faults. public’s risk from radionuclides granitoid is estimated calculating radiological risks. excess lifetime cancer (ELCR) exceed permissible limit. Therefore, granitoids unsuitable for use as infrastructure materials.