Abstract

• The research area, granodiorite-hosted gold deposit, is situated within the Pinlebu Township, Sagaing Region, Northern Myanmar. It is bounded by latitude 24° 3' 30"to 24° 12' 30"N and longitude 95° 32' 00"to 95° 40' 00"E and falls in UTM map 2495-12. The research area consists chiefly of the various igneous rock types which form a batholith and sedimentary units. Ore deposits of gold are hosted in the Kanzachaung batholith (Wuntho massif) especially as granodiorite and diorite body. Five gold deposits were observed at Magyibin and Kaba area, productive gold deposits are MG-1, MG-2, KB-1, KB-2 and KB-3. Most of mineralized quartz veins, fracture filling, are recognized in the fracture zone of granodiorite body and diorite body. Quartz veins in the research area contain gold (Au), lead (PbS) and copper (CuSO4). The mineralized quartz veins show lenticular and banded nature. In some places, pinch and swell structures are noted. Economically the main ore mineral is gold. The mineralogy of the vein is relatively simple and can be recognized into three paragenetic stages. Stage-1 and stage-2 are main mineralization stages and stage-3 is post- ore forming stage. Ore deposit of the research area is hydrothermal origin source of hydrothermal ore fluid is considered to be meteoric water and magmatic water. It is reasonable to conclude that mineralization in the present area might have been formed at the late stage of or after the intrusion.