STUDY OF GEOCHEMICAL ROCK CHARACTERISTICS OF MASSIVE SILICA ALTERATION IN EPITHERMAL HIGH SULPHIDATION DEPOSITS

• Main Author: JUSTINA (NIM : 12114045), JULIA
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/28347
• Institution: Institut Teknologi Bandung

Mining activities at high epithermal sulphidation deposits with massive silica alteration have the potential to generate acid mine water because the rocks contain sulphide minerals. The initial step to control the acid mine water is by characterize the geochemical properties of the rocks. Geochemical characterization is done by static test and kinetic test. XRD (X-Ray Diffraction) and XRF (X-Ray Fluorescence) tests were performed to confirm the element or mineral in the rocks that potentially form the acid. In addition, it is also necessary to test the water quality of leachate to be compared with the quality standard as stated in the Keputusan Menteri Lingkungan Hidup No. 202 Tahun 2004. <br /> <br /> As a results, 1 sample classified as potentially acid forming high capacity (PAF-HC) rock and 5 samples classified as potentially acid form low capacity (PAF-LC) rocks. If the rock is ore, then for mine water treatment can be done after the mining process because the potential acidic source of water comes from tailings ore processing by water cover or from spent ore if ore extraction using heap leach method by encapsulation. If the rock is waste, then acid mine acid formation can be prevented by encapsulation method.