Analisis Pengaruh Morfologi Terhadap Ketebalan dan Zona Pengkayaan Endapan Nikel Laterit PT. X Provinsi Sulawesi Tengah
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Abstract
Indonesia is one of the countries with the largest nickel reserves in the world. Nickel is a metal element that has a high selling value in the global market. This study aims to determine the influence of morphology on the thickness and enrichment zone of laterite nickel deposits. Research methods include literature studies; Observing morphology and collecting samples under the surface; laboratory analysis using X-ray fluorescence (XRF); and data analysis. The results of the study explained that the morphology at the research location including low hills/hills has a slightly sloping slope with a relatively thick ore layer thickness of 8.62-13 meters and a rather steep slope with a relatively thin ore layer thickness of 5-12 meters. The distribution of Fe and Ni content increased in the morphology of low hills/hills with a slightly sloping-slightly steep slope with an average of 41.1-31.1% Fe and 1.4-1.3% Ni on average while a steep slope with low Ni with an average of 1.1% where morphology has a role/influence on weathering and supergene enrichment enrichmentso that groundwater containing nickel enters through rock cracks/crevices and brings the nickel element down to the saprolite layer, because the element Ni is mobile/easily soluble carried by water. Meanwhile, the element Fe has an enrichment process in the limonite layer because the element Fe is immobile or cannot be carried or dissolved by water.
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