APPLICATION OF REMOTE SENSING OPTICAL SENSOR FOR TINASSOCIATED MINERAL MAPPING IN THE AREA OF THE TANJUNGPANDAN BELITUNG GRANITE FORMATION

• Main Author: Ilham Muyasar, Dzaky
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/54439
• Institution: Institut Teknologi Bandung

Theoretically, reflectance spectroscopy and imaging with remote sensing technology are non-destructive methods to identify surface materials including rocks and minerals. (Hede et al., 2019). In Indonesia, the presence of REE-carrying minerals such as monazite, xenotime, and zircon, is usually associated with granite as a tin-associated mineral (MIT) along with cassiterite, ilmenite, rutile, iron oxide, and others. This study aims to apply the principle of reflectance spectroscopy at a wavelength of 0.35-2.5 ?m and map the distribution of MIT on the surface by utilizing optical sensor imaging technology in the distribution area of the Tanjungpandan Belitung Granite Formation. The data used are hyperspectral-Hyperion and multispectral-Sentinel-2 satellite imagery data and 38 field sample data whose reflectance is measured using a spectroradiometer. Mineral mapping with remote sensing data uses two methods, namely spectral angle mapper (SAM) and the linear spectral unmixing (LSU). Both SAM and LSU use two endmember input data. The presence of tin-associated minerals such as hematite, magnetite, monazite, xenotime, and zircon, as well as secondary minerals such as dickite, gibbsite, halloysite, illite, and kaolinite, is indicated by the results of this study's field sample data analysis. The results of sensory mapping obtained several potential target locations in the IUP area of PT Timah Tbk which can be used for supporting data in survey exploration related to the mineral conservation program on Belitung Island. Finally, from the analysis of the differences in the mapping results, it can be concluded that the hyperspectral image data is better than the multispectral image data in identifying spectral of the surface materials.