Mining activities in Bangka Island are being conducted since Dutch colonial era. The wastes of tin mining produced many abandoned tailings which could cause negative impact for environment. However, there are accessory minerals in tailings which could be the new potential source of critical mineral. The purpose of this study is to identify accessory minerals and content percentage of monazite in tailings of ex – tin mine in Bangka Island. The methods used in this study is determining the composite minerals based on grain counting analysis of 30 pan concentrate samples from several locations in Bangka Island before estimating the monazite content based on comparison between monazite percentage, pan concentrate mass, and tailing bulk mass. Based on mineral identification it is shown that the tailings consist of several minerals such as cassiterite, monazite, zircon, ilmenite, magnetite, hematite, anatase, rutile, tourmaline, fluorite, garnet, and pyrite with average monazite content in concentrate sample is 10.24%. Based on the calculation it is shown that the average value of monazite grade in tin mine tailing is 16.41 kg/ m3. The result of this study is expected to be some input for stakeholders to implement mineral conservation for achieving sustainable mining in the future.
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