ENRICHMENT POTENTIAL OF TIN AND RARE EARTH ELEMENTS IN PLACER DEPOSIT IN BADAU, BELITUNG REGENCY

• Main Author: Dewanto, Salman
• Format: Final Project
• Language: Indonesia
• Subjects: Geologi, hidrologi & meteorologi
• Online Access: https://digilib.itb.ac.id/gdl/view/69855
• Institution: Institut Teknologi Bandung

The research location is located at Badau District, Belitung Regency, Bangka Belitung Islands. This research aims to map the distribution and enrichment area of tin and rare earth elements in placer deposits. In addition, this research also aims to recommend further exploration areas. The methods conducted in this research were geological mapping, rock sampling, and placer sediment sampling. Analysis of placer sediment samples was carried out on three-grain size fractions, the +48-mesh fraction (297 – 354 ?m), the +100-mesh fraction (149 ?m), and the - 100-mesh fraction (<149 ?m). Mineral content in placer sediment samples can be identified from the results of Grain Counting Analysis (GCA). The results of this analysis indicate cassiterite as a mineral with an angular-subangular grain appearance that contains the Sn element. The geochemical data analyzed in this research were the content value of Sn, Ce, La, and Y elements from placer sediment samples. The element content data was obtained from X-Ray Fluorescence (XRF) which was then performed a univariate analysis with the aim of determining the anomaly value of the element. In the research area, Sn element has a content value in the range from 9.67 ppm to 82652 ppm; Ce element has a content value in the range from 113.33 ppm to 3570 ppm; La element has a content value in the range from 72.67 ppm to 1404.33 ppm; Y element has a content value in the range from 6 ppm to 784.67 ppm. The results of the univariate analysis are then related to the geological conditions of the study area so that tin and rare earth elements enrichment areas can be determined in the middle of the research area.