STUDY OF ALTERATION AND MINERALIZATION AROUND PT TIMAH IUP, SOUTH BANGKA BASED ON MICROSCOPIC OBSERVATIONS

• Main Author: Sorrenio Ambrosius, Saul
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/62422
• Institution: Institut Teknologi Bandung

The main mineral resource in the South Bangka area is cassiterite, with associated minerals such as monazite, zircon, xenotime, ilmenite, magnetite and pyrite. Although the ore deposits in the area are dominated by placer sedimentary deposits, there are also indications of the presence of primary tin ore deposits. A practical guide in finding primary tin ore minerals that are part of a hydrothermal deposit is to identify the alteration zone. The purpose of this study was to identify the presence of alteration minerals based on macroscopic and microscopic observations and to determine the characterization of alterations in several samples taken from the Paku area, South Bangka, Bangka Belitung Islands Province. Six samples were taken for observation from the area around the IUP PT Timah (2°35'–2°33' south latitude and 106°10'–106°18' east longitude) located in the Klabat Granite (TRJkg) and Tanjung Formation areas. Genting (TRt). Observing and shooting picture samples using a Dino-lite digital camera and a polarizing microscope. The determination of the alteration characterization of each sample in this study was carried out by identifying the main characteristics for each alteration zone. Observation results show that not all samples have undergone alteration. From the observation of thin and polished section on the six samples (TA-13, TA-30, TA-32, TA-34, TA-35, TA-36) there were four samples had argillic alteration (TA-13, TA-30, TA-34, TA-36), one sample had phyllic alteration (TA-32), and one sample had no alteration (TA-35). The results of this study are expected to be a guideline for identifying areas that have the potential for further investigation.