Abstract
The petrography and geochemical characteristics of three granitic intrusion bodies in Ramsar area are investigated. The concentration of radioactive elements in Arud is higher than Noosha and Akapol. Arud is a within plate and volcanic arc I-type granite. High 226Ra, U, Th, Rb/Sr, and LREE/HREE (LaN/YbN) values and low K/Rb, Zr, and Hf values indicate that Arud is more differentiated. Natural radioactivity of Arud is probably the result of abundant apatite, allanite, sphene, and zircon minerals. Chondrite-normalized REEs spider diagrams showed that 226Ra-rich carbonate deposits of soil and sediment samples are probably geochemically related to Arud subsurface magmatic system.
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