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Ni-Co Bearing Laterites from Halmahera Island (Indonesia)

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cris.lastimport.scopus2024-02-12T20:57:20Z
dc.abstract.enEastern Indonesia, including the island of Halmahera, is a region with a high mineral potential, particularly Ni-Co, Au-Cu, and Ag ores, which are a globally important and critical source of raw materials (CRMs). The research was conducted within the framework of scientific cooperation between the Faculty of Geology, University of Warsaw (Poland), and PT Halmahera Resources Percasa Ltd. (Jakarta, Indonesia) Between the years of 2009 and 2011, 42 boreholes were drilled using an impact system (up to 15 m below surface) and 3 test pits (up to 8 m below surface). The presence of a laterite deposit containing Ni-Co mineralization was identified on the license area. The resources estimated in accordance with JORC Code, with a cut-off grade Ni ≥ 0.5%, equaling 185,510 t Ni and 17,747 t Co, with the stock of raw material amounting to 14.8 million t and with an average content of 1.00% Ni and 0.13% Co. The ore in the deposit has mixed character. To date, studies have shown the dominance of oxide ore, but saprolite composed of magnesium silicates was also identified in significant amount. The Ni mineralization in oxide ore (limonite) is bound to goethite and manganese minerals, while in the case of silicate (saprolite) ore, it occurs locally in the form of veins as well as zonally in the weathered serpentinites. Cobalt mineralization is almost entirely related to the Mn minerals that occur in the lower oxide zone. It has been found that both serpentinites and harzburgites (and possibly locally lherzolite) are the parent rocks for laterite deposit.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorZglinicki, Karol
dc.contributor.authorSzamałek, Krzysztof
dc.contributor.authorKonopka, Gustaw
dc.date.accessioned2024-01-25T13:49:17Z
dc.date.available2024-01-25T13:49:17Z
dc.date.copyright2022-07-28
dc.date.issued2022
dc.description.accesstimeAT_PUBLICATION
dc.description.financeŚrodki finansowe przyznane na realizację projektu w zakresie badań naukowych lub prac rozwojowych
dc.description.number15
dc.description.versionFINAL_PUBLISHED
dc.description.volume12
dc.identifier.doi10.3390/APP12157586
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/113653
dc.identifier.weblinkhttps://www.mdpi.com/2076-3417/12/15/7586/pdf
dc.languageeng
dc.pbn.affiliationearth and related environmental sciences
dc.relation.ispartofApplied Sciences (Switzerland)
dc.relation.pages7586
dc.rightsCC-BY
dc.sciencecloudnosend
dc.titleNi-Co Bearing Laterites from Halmahera Island (Indonesia)
dc.typeJournalArticle
dspace.entity.typePublication