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All Journal Journal of Degraded and Mining Lands Management Journal of Geoscience, Engineering, Environment, and Technology Jurnal Geosains dan Teknologi Jurnal GEOSAPTA Prosiding Temu Profesi Tahunan PERHAPI Journal of Community Development Ophiolite : Jurnal Geologi Terapan Mining Science and Technology Journal Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources) OPHIOLITE : Jurnal Geologi Terapan Karya Nyata: Jurnal Pengabdian Kepada Masyarakat Mekongga: Jurnal Pengabdian Masyarakat
Jaya, Rio Irhan Mais Cendra
Universitas Halu Oleo
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Mechanical Engineering Nursing Physics Public Health Social Sciences Other

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Journal : Journal of Geoscience, Engineering, Environment, and Technology

 1 
Petrochemistry of Ultramafic Rock in Baula - Pomalaa Ophiolite Complex, Southeast Sulawesi, Indonesia Cendrajaya, Rio Irhan Mais; Juarsan, Laode Ihksan; Masri; Rubaiyn, Al; Syahrul; Neni; Ramadani, Suci; Hasria
Journal of Geoscience, Engineering, Environment, and Technology Vol. 9 No. 1 (2024): JGEET Vol 09 No 01 : March (2024)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2024.9.1.14491

Abstract

Baula and Pomalaa Ophiolitic Complexes are part of East Sulawesi Ophiolite (ESO). The ultramafic rocks in the Baula and Pomalaa Ophiolite Complex mainly is peridotite and consist of harzburgite, lherzolite and olivine websterite, mostly serpentinized. Chemical and petrological research has focused on minerals, such as olivine, pyroxene, and spinel. This study examines the tectonic setting and temperature of ultramafic rock formation. Twelve ultramafic rock samples were examined using geothermometers made of pyroxene, petrographic examination, and coexisting olivine and spinel analyses. SEM and petrographic analysis of pyroxene lamellae and mylonite-ultramylonite structures allowed for the measurement of the geothermometer of ultramafic rocks. Using SEM-EDS, the coexistence of olivine and spinel was analyzed to determine the type of ultramafic tectonic setting. In the coexistence of olivine and spinel, olivine and spinel oxide compounds as tectonic setting markers in the form of Fo and Cr# values. Ultramafic rocks have different temperature levels, based on pyroxene thermometer, and the first one starts at a high temperature of 1000-1200ºC. It is characterized by thin, elongated augite lamellae. Instead, large lamellae characterize augite at medium temperatures (800–1000ºC). Irregular, anhedral, and broader forms of enstatite lamellae are typical of low temperatures (500–800ºC). Different generations of exsolution lamellae indicate that magma cooling was gradual. The distribution of #Fo ranged from 0.87 to 0.92, and Cr# values ranged from 0.13-0.19. According to coexisting olivine and spinel analysis. On the Olivine-Spinel Mantle Array (OSMA), the Fo and Cr# plot indicates that the peridotites tectonic setting was from the ocean floor and the magmatism was from MORB (Mid Oceanic Ridge Basalt). The Al2O3 vs. TiO2 pattern in spinel lherzolite also similar with Ampana and Kabaena peridotites magmatism.
Assessing the Carbon Sequestration Potential of Ultramafic Rocks in the Kolaka Ophiolite Complex, Southheastern Sulawesi: A Petrographic, Geochemical, and Mineralogical Study Syahrul; La Ode Dzakir; Riska; Rio Irhan Mais Cendra jaya; Masri
Journal of Geoscience, Engineering, Environment, and Technology Vol. 10 No. 1 (2025): Article In Press JGEET Vol 10 No 01 : March (2025)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Climate change has prompted significant global interest in carbon sequestration technologies, particularly using geological formations. This study investigates the potential of ultramafic rocks from the Kolaka Ophiolite Complex in Southeast Sulawesi for carbon sequestration, focusing on the mineralogical, petrographic, and geochemical characteristics that enhance their reactivity with CO₂. The research involved petrographic and mineragraphic analyses of 15 peridotite samples, geochemical measurements via X-ray fluorescence (XRF), and mineral characterization using scanning electron microscopy (SEM). The results revealed that Kolaka's ultramafic rocks, particularly harzburgite and lherzolite, exhibit moderate to high serpentinization, which enhances their reactivity with CO₂. Key minerals such as olivine, pyroxene, and serpentine, rich in magnesium, calcium, and iron oxides, demonstrate significant potential for mineral carbonation. Secondary minerals like magnesite and brucite were identified as products of carbonation, reinforcing the rocks' ability to act as carbon sinks. The discussion highlights that serpentinized peridotites are more effective for carbon sequestration than unaltered ones due to increased mineral reactivity. The presence of magnesite and Cr-Fe-rich carbonates, alongside serpentine veins, indicates that fluid-rock interactions have promoted ongoing carbonation processes. The Kolaka ultramafic rocks, therefore, hold strong potential for long-term carbon storage, offering a promising solution for reducing atmospheric CO₂ levels
Co-Authors Al Firman, Al Firman Ali Okto Amritzal Nur Firdaus Arisona Arisona Arisona Arisona Asri Arifin Atodding, Wa Ode Sitti Jumrana Bahdad Bahdad Deniyatno Deniyatno, Deniyatno Erwin Anshari Harisma Buburanda, Harisma Harisma, Harisma Hasria Hasria Hasria Hasria Hasria, Hasria Ihksan Juarsan, Laode Isman Saleh Juarsan, Laode Ihksan Kumalasari, Rizki La Ode Dzakir La Ode Ngkoimani Masri Masri Masri Masri Masri Masri Muliddin NENI Nopri Asharun Nur Syamsiah, Nur Okto, Ali Pramadana, Reza Putri, Ulfhi Aliyandha Ramadani, Suci Razak Haraty, Syamsul Resmin, Masrandi Risal Sepdiansar Riska Rubaiyn, Al Sabaria, Sabaria Sahiddin, La Ode Salihin, La Ode M. Iradat Sara Septiana Sawaludin, Sawaludin Suryawan Asfar Suwardi, Wa Ode Syahrul Syahrul Syahrul Wahab Wahab