Abstract

• Taung Ni gold prospect area is situated in Madaya Township, Mandalay Region, Myanmar. The host rocks, quartzite and phyllite were metamorphosed under greenschist facies conditions. Gold mineralization is mainly hosted by quartzite of Chaungmagyi Group which is deformed, jointed, brecciated and interbedded with phyllite. In its area, gold-bearing sulphide quartz veins and auriferous deformed/ remobilized quartz veins are found. In these two types of veins systems, Pearson statistical analyses confirm a significant correlation between SiO2 and other major oxides as most strongly negative correlation indicates that the both quartz veins bearing gold are of hydrothermal origin. The Co and Ni contents in pyrite show Co>Ni and the average ratio for Co/Ni is 2.698. The gold fineness shows two ranges: (1) high fineness (826.2 - 881.3) and (2) low fineness (771 - 795). In sulphide bearing quartz vein (Early Stage), homogenization temperature can be measured and it ranges from 340°C to 403°C and melting temperature ranging from -1.7 to -2.0, salinity NaCl equiv. wt.% range from 3.01 to 3.53. In deformed quartz vein (Later Stage), the range of melting temperature is from -1.3 °C to -1.6 °C and salinity NaCl equiv. wt. % is from 2.31 to 2.83. Homogenization temperature is 320°C to 396°C.