MINERALOGICAL STUDY AND TRACE ELEMENT CHARACTERIZATION OF SULFIDE MINERALS IN OROGENIC GOLD DEPOSITS IN MERATUS, SOUTH KALIMANTAN

• Main Author: Febriyani, Ageng
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/86465
• Institution: Institut Teknologi Bandung

The Meratus Mountains in South Kalimantan are known for their orogenic gold deposits, associated with sulfide mineralization. This study aims to identify the relationship between mineralogy, particularly sulfide minerals, and the distribution of visually undetectable precious metals. Samples were taken from drill cores at depths of 90 to 140 meters and analyzed using petrography, ore microscopy, SEM, and LA-ICPMS methods. The main minerals identified were pirit and kalkopirit, observed in petrography and ore microscopy. Precious metals and trace elements, including Co, Ni, Cu, As, Se, Mo, Ag, Sb, Te, Au, Pb, and Bi, were found in associations and inclusions detected through SEM and LA-ICPMS. The analysis suggests that the deposition of precious metals, including gold, is influenced by hydrothermal activity altering Fe in pirit. The combination of these analytical methods provides insights into the mineralogy and trace element characteristics associated with orogenic gold deposits in the Meratus Mountains.