Abstract

• The study area is situated in Mogok Township, Mandalay Region. It is bounded by latitude 22°42'00"N to 22°54'00"N and longitude 96°19'00"E to 96°27'00"E. The igneous rocks exposed in the study area consist of pegmatite and granite. The 16 granitoid samples were analyzed for major and trace elements by XRF method. Most of the peraluminous granitoids are plotted in felsic peraluminous field, one biotite microgranite falls in high-peraluminous field, one biotite microgranite and one tourmaline granite fall in moderate-peraluminous field and one hornblende granite fall in low-peraluminous field. According to the major and trace elements composition granitoids of the study area are both of S-type granite and I-type granite. Major elements analysis indicates that most of granitoids belong to the field of IAG, CAG and CCG and they correspond to syn-collision and late orogenic zone. Moreover, trace elements composition shows these granitoids belong to the field of VAG and syn-collision granite and they are tectonically located in the active continental margin. Economically important rare earth elements are discovered in the study area in granitoids and pegmatites.