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PEDOGENESIS OF LATERITIC SOILS AND THE ENRICHMENT OF CRITICAL METALS: A STUDY FROM SOUTHEAST SULAWESI, INDONESIA
- Source :
- Rudarsko-geološko-naftni zbornik, Volume 38, Issue 2
- Publication Year :
- 2023
- Publisher :
- Faculty of Mining, Geology and Petroleum Engineering University of Zagreb, 2023.
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Abstract
- Lateritic soil is a prospective source of metals termed critical or strategic metals due to their use in high-technology industries. Critical metals include rare earth elements (REEs). In this study, two profiles of lateritic outcrops from the Ni-producing area of Southeast Sulawesi in Indonesia were sampled for magnetic susceptibility as well µ-XRF analyses to identify how the concentration of critical metals changed during pedogenesis. The results show that there are three different patterns from the bottom layer up. The first pattern is enrichment experienced by Sc, La, Cr, and Ti. The second pattern is depletion experienced by Ni, Nd, and Ho. The third pattern is the localization of high concentration at a certain depth, as experienced by Co, Ce, and V. The concentration of certain critical metals correlates either positively or negatively with magnetic susceptibility, inferring that magnetic susceptibility might be used as a proxy indicator for critical metal concentration in lateritic soil.<br />Lateritno tlo je potencijalni izvor metala koji se nazivaju kritični ili strateški metali zbog njihove upotrebe u industrijama visoke tehnologije. Kritični metali uključuju elemente rijetkih zemalja (REE). U ovom istraživanju uzorkovana su dva profila lateritnih izdanaka iz područja proizvodnje nikla u jugoistočnom Sulawesi u Indoneziji, s ciljem definiranja promjene koncentracija kritičnih metala tijekom pedogeneze korištenjem magnetne susceptibilnosti i μ-XRF analiza. Rezultati su ukazali na postojanje tri različita obrasca od donjeg sloja prema gore. Prvi obrazac predstavlja obogaćivanje Sc, La, Cr i Ti. Drugi obrazac predstavljen je sniženjem koncentracija Ni, Nd i Ho. Treći obrazac predstavlja lokalizaciju visokih koncentracija određenih metala na određenoj dubini, kao što su Co, Ce i V. Koncentracija nekih kritičnih metala korelira bilo pozitivno ili negativno s magnetnom susceptibilnosti, što upućuje na to da bi se magnetna susceptibilnost mogla koristiti kao indikator kritičnih koncentracija metala u lateritnom tlu.
Details
- Language :
- English
- ISSN :
- 18490409 and 03534529
- Volume :
- 38
- Issue :
- 2
- Database :
- OpenAIRE
- Journal :
- Rudarsko-geološko-naftni zbornik
- Accession number :
- edsair.od.......951..a3d211acdda08422e811b66b81931976