Karakteristik Endapan Bijih Besi Daerah Pakke Desa Langi, Kecamatan Bontocani, Kabupaten Bone, Provinsi Sulawesi

Abstract

Iron ore in the Pakke area was found in the form of chunks of magnetite and hematite iron ore associated with granodiorite intrusion and granodiorite pegmatite (Utoyo, 2008). This study aims to determine the geological conditions, types of rocks and minerals carrying iron ore, as well as the characteristics of the iron ore deposits in the study area. The data collection stage was in the form of outcrop observation. The lithology sample was taken using the Rock Sampling method. The analytical methods used to determine the characteristics of iron ore deposits are petrographic analysis to determine the type of lithology, mineral analysis to determine ore carrier minerals and XRD (X-Ray Diffraction) analysis to determine alteration minerals and ore minerals. Based on the type of alteration and mineralization, it is known that the type of iron ore deposits in the study area is skarn deposits. Where this skarn deposit is formed a high temperature contact metamorphism process. Magma rich in silica extrudes carbonate-rich sedimentary rocks such as limestone. The type of rock in the research area is igneous rock in the form of basalt which is indicated as source rock and carbonate rock in the form of wackstone which is indicated as host rock or iron ore storage rock where the carrying minerals of iron ore are magnetite, hematite and goethite.