Rare earth element content based on geology in Muntok and Jebus subdistricts, Bangka Belitung islands province

Abstract Kolong, a former tin mine, is a potential location for associated minerals such as monazite and xenotime. Granite in Muntok-Jebus is known to contain thorium, yttrium, cerium, and other LTJ elements. Research was conducted to identify the types of rare earth metal elements based on the geological conditions in the kolong. The method was carried out by identifying samples geochemically using XRF and water content using a pH meter. The results of the study were found to have a geological structure of joints in the rocks of the research location in Muntok District, while the Jebus area was not found. The highest elements of Cerium and lanthanum were found in Kolong Air Putih Village with levels of 6069 ppm and 3232 ppm, the highest Yttrium levels were in Kolong Terabek, Belo Laut Village with levels of 3846 ppm, and the highest neodymium levels were in Kolong Mayang Village with levels of 1454 ppm. The mine pits in Muntok District are young, ranging from 1 to 5 years old, with water pH values tending to be acidic, ranging from 4.0 to 4.9, except in Terabek, which shows a neutral pH of 7.0. The dominant lithology in this area is sand and clay, accompanied by gravel and coral in several locations. The mine pits in Jebus District are between 21 and 35 years old, with a relatively more stable water pH, ranging from 5.6 to 6.3. The lithology of the Jebus area is dominated by clay, sand, and muddy soil.