Origin of Podiform Chromitites in the Sebuku Island Ophiolite (South Kalimantan, Indonesia): Constraints from Chromite Composition and PGE Mineralogy

Idrus, Arifudin; Zaccarini, Federica; Garuti, Giorgio; Wijaya, I Gusti Ngurah Kusuma; Swamidharma, Yoseph Calasanctius Amita; Bauer, Christoph

doi:10.3390/min12080974

Cited by 3 publications

(1 citation statement)

References 73 publications

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“…Meratus ultramafic spreads from the eastern Borneo and Sebuku Island. Nickel mining in the Meratus ultramafic region is only situated on Sebuku Island (Idrus et al, 2022), which means that the outcrop in Borneo and Laut Island is a high potential for CO 2 storage. 2021); ( 6) Irzon ( 2018); ( 7) Irzon (2019); ( 8) Irzon and Abdullah (2018); ( 9) White et al (2017); ( 10) Maulana et al (2015); ( 11) Zakharova et al (2012).…”

Section: Prospecting Mineral Carbonation In Indonesiamentioning

confidence: 99%

Prospecting CCS Project in Indonesia: A Case Study in Meratus Mountains, South Borneo

Irzon,

Hanang Samodra,

Sam Permanadewi

2024

jgsm.geologi

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Long-term extensive carbon dioxide exposure inflicts diseases for humans and endangers the ecosystem. Carbon Capture and Storage (CCS) is a breakthrough to reduce CO2 in the atmosphere. The purpose of this study is to describe the CCS principles and suitability of this work in Indonesia, especially in the Meratus Mountains. The studied region is the major area of the Meratus Geopark. Selected ultramafic rocks from the Meratus Geopark were analyzed using X-Ray Fluorescence in the University of Tasmania. CCS project should consider the minimum implication for conservation strategy of geopark. Geologically, CCS is adapted through direct sequestration and carbon mineralization. Mafic-ultramafic lithologies are the best option for mineral carbonation. Most of the basaltic rocks in Indonesia are situated near active volcanoes that are heavily risky for CCS works. Ultramafic in the range of Meratus Geopark is clearly suitable for CCS because of its large expanse, far away from active volcanoes, without significant nickel mining activity. The project would promote geohazards and climate change issues of Meratus Geopark. In-situ CSS mineral carbonation should be located avoiding the Sultan Adam Mandiangin Serpentinite Geosite to nourish the geoconservation of Meratus Geopark. A successful CCS adaptation would be good evidence for the Indonesian government implementing the Paris Agreement. Keywords: Carbon Capture and Storage, In-situ mineral carbonation, ultramafic, Meratus Geopark.

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Section: Prospecting Mineral Carbonation In Indonesiamentioning

confidence: 99%

Prospecting CCS Project in Indonesia: A Case Study in Meratus Mountains, South Borneo

Irzon,

Hanang Samodra,

Sam Permanadewi

2024

jgsm.geologi

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Finding Argoland: Reconstructing a microcontinental archipelago from the SE Asian accretionary orogen

Advokaat,

van Hinsbergen

2024

Gondwana Research

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Platinum Group Elements (PGE) Geochemistry and Mineralogy of Low Economic Potential (Rh-Pt-Pd)-Rich Chromitites from Ophiolite Complexes

et al. 2022

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This contribution provides an overview of platinum group elements (PGE) distribution and mineralogy in ophiolitic chromitites, which are unusually enriched in the low melting-point Rh, Pt and Pd (PPGE) compared with most chromite deposits associated with ophiolites, which are dominated by the refractory Os, Ir and Ru (IPGE). The PPGE-rich chromitites examined in this paper have a PPGE/IPGE ratio equal to or higher than 1 and represent about 7% of the ophiolitic chromitite population. These chromitites occur in the mantle unit, in the mantle-transition zone (MTZ), as well as in the supra-Moho cumulate sequence of ophiolite complexes. The age of their host ophiolites varies from Proterozoic to Eocene and, based on their composition, the chromitites can be classified into Cr-rich and Al-rich categories. Mineralogical assemblages observed in this investigation suggest that the PPGE enrichment was achieved in the magmatic stage thanks to the formation of an immiscible sulfide liquid segregating during or immediately after chromite precipitation. The sulfide liquid collected the available chalcophile PPGE that precipitated as specific phases together with Ni-Cu-Fe sulfides in the host chromitite and the silicate matrix. After their magmatic precipitation, the PPGM and associated sulfides were altered during low-temperature serpentinization and hydrothermal processes. Therefore, the original high-temperature assemblage underwent desulfurization, generating awaruite and alloys characterized by variable Pt-Pd-Rh-Cu-Ni-Fe assemblages. The occurrence of secondary PPGM containing Sb, As, Bi, Te, Sn, Hg, Pb and Au suggests that these elements might have been originally present in the differentiating magmatic sulfide liquid or, alternatively, they were introduced by an external source transported by hydrothermal and hydrous fluids during the low-temperature evolution of the host ophiolite. Although the PGE content may be as high as 81,867 ppb, as was found in one sample from Shetland chromite deposits, the ophiolitic chromitites are presently considered as a potential resource because of the following circumstances: (1) enrichment of PPGE in podiform chromitites is a local event that occurs randomly in ophiolite sequences, (2) ore deposits are small and characterized by uneven distribution and high discontinuity, (3) physical characters of the mineralization only allow poor recovery of the precious metals mainly due to the minute grain size, and (4) for these reasons, the PPGE reserves in ophiolitic chromitites cannot compete, at the moment, with those in chromite deposits of the Bushveld type that will supply world demands for centuries using current mining techniques.

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Origin of Podiform Chromitites in the Sebuku Island Ophiolite (South Kalimantan, Indonesia): Constraints from Chromite Composition and PGE Mineralogy

Cited by 3 publications

References 73 publications

Prospecting CCS Project in Indonesia: A Case Study in Meratus Mountains, South Borneo

Prospecting CCS Project in Indonesia: A Case Study in Meratus Mountains, South Borneo

Finding Argoland: Reconstructing a microcontinental archipelago from the SE Asian accretionary orogen

Platinum Group Elements (PGE) Geochemistry and Mineralogy of Low Economic Potential (Rh-Pt-Pd)-Rich Chromitites from Ophiolite Complexes

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