Abstract

• The study area is situated about 8 km north of Kyaing Tong. It covers a part of UTM map sheet No.2199/11. Areal coverage is about 130 square kilometers. Regionally, the study area comprises the Eastern High Lands Province, located in the western part of the Shan-Thai Block. The present area lies within the Eastern Granitoid belt of Myanmar, comprise in mostlyigneous units in the area. Representative samples from the study area were used to analyze the geochemical study of the granitoid rocks. Although Kyaing Tong batholith mainly consists of biotite granite, porphyritic biotite granite, foliated granite, hornblende granite, granodiorite and leucogranite, this study will focus on geochemistry and tectonic setting of Kyaing Tong S-type granite. A total of 7 representative samples have been selected and analysed for this study. The whole rock major oxides and trace element compositions were analyzed by XRF (X-ray fluorescence) spectrometer using standard calibration method at Economic Geology Lab., Department of Earth Resources Engineering, Kyushu University, Japan. Fresh rock specimens of about 0.5-1kg were crushed for XRF sample preparation method. Major oxides analysis was carried out on fusion discs and trace elements were pressed powered pills. Aims of this research which are: to study geochemical characteristics and to interpret the tectonic setting of the study area, tectonic discrimination diagrams were illustrated by using PetroGraph 2Beta software and GCD kits software. All analyzed samples fall in in acid group, recognized in subalkaline/tholeiitic series. Kyaing Tong granitoid rocks are the high abundance of Cr, Rb Ba, S, Zr and Sr. Based on the geochemical data, most granitoid rocks belong to the peraluminous field. Kyaing Tong S-type Granitoids of subduction related rocks due to the collision effects of Sibumasu and Indochina Block during Late Triassic closure of paleotethys, later Indosinian orogeny event.