IDENTIFIKASI POTENSIAL UNSUR LOGAM TANAH JARANG PADA KOLONG PENAMBANGAN TIMAH DAERAH MUNTOK KABUPATEN BANGKA BARAT

Abstract

This research examines the potential identification of rare earth metal elements from kolong tin mining in the Muntok area of West Bangka Regency. The problem behind this research is that the world market demand for soil metals is increasing, which encourages many parties to find reserves of rare earth metals themselves. In Indonesia, especially on kolong tin mining, it is considered to have a potential level of rare earth metals because rare earth metal mineral minerals are a tin mineral which is usually found also in tin mining activities. The method used in this study is quantitative and qualitative methods, namely by identifying the elements and minerals contained in the sample and analyzing the distribution. The XRF test results of 19 surface sediment samples taken at 6 different bases stated that rare earth metal elements detected in the study area only consisted of 4 types of elements. These elements are Cerium (Ce), Lanthanum (La), Yttrium (Y), and Neodymium (Nd). The concentration of each element in each place is different, where the highest element concentration is owned by the cerium element which is between 564 ppm – 3,555 ppm, the second most is owned by the yttrium element which is between 366.75 ppm – 2,040.5 ppm, the third most is owned by the lanthanum element which is between 310 ppm – 1,531.67 ppm, while the lowest is owned by the neodymium element which is between 0 - 799.67 ppm. From the analysis using the GCA method, it is known that monazite is found in each of the research sites with varying levels, while zircon is only found in three locations, namely under Belo Laut Village, Mayang Village, and Terabek Village where the abundance of each mineral in each location is under different in each type, the highest concentration of monasite minerals is in the range of 0.225-2.94% by weight and the lowest concentration is owned by zircon minerals, which range from 0-0.69% by weight.