Genetic Analysis of Iron Ore Deposits in Pakke Region Bontocani District Bone Regency South Sulawesi
DOI:
https://doi.org/10.33096/2d79b650Keywords:
Alteration, Petrography, Mineragraphy, XRD, SkarnAbstract
Characteristics of iron ore deposits vary significantly from the physical properties of the ore carrier rock, the physical and chemical properties of the ore carrier minerals, and the geological conditions of an area, causing variations or types of iron ore deposits. Based on this, the research will focus on the characteristics of alteration or mineral alteration in iron ore deposits in the Pakke area, Bontocani District, and Bone Regency. This study aims to determine the type of alteration in iron ore deposits. The sampling process used chip sampling and grab sampling, where five samples were taken in the form of ore samples. The data analysis process from the samples obtained was analyzed using petrographic analysis, micrography, and XRD (X-ray diffraction). Petrographic analysis is used on altered rock samples to determine alteration mineral assemblages and rock names. Mineragraphic analysis was carried out on iron ore samples to determine the assemblage of iron ore carrier minerals and alteration characterizing ore minerals. XRD (X-ray diffraction) was conducted to determine the set of alteration minerals, iron ore carrier minerals, and alteration-characterizing ore minerals. The characteristic of skarn-type alteration is the type of alteration formed in the research area. Skarn alteration is characterized by the presence of the main characterizing minerals, namely garnet, epidote, diopsid, and wollastonite. The sequence of formation of the alteration of the curvature includes three stages, namely the first isochemical (600ºC), the second stage is metasomatism (600-400ºC), and the third stage is retrograde (400-200ºC).
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