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Pengaruh Kemiringan Lereng Terhadap Ketebalan Endapan Nikel Laterit Daerah Tobimeita, Kecamatan Langgikima, Kabupaten Konawe Utara, Provinsi Sulawesi Tenggara Hasria, Hasria; Resmin, Masrandi; Okto, Ali; Masri, Masri; Arisona, Arisona; Al Firman, Al Firman; Harisma, Harisma; Jaya, Rio Irham Mais Cendra; Septiana, Sara; Sawaludin, Sawaludin; Salihin, La Ode M. Iradat
Jurnal Geosains dan Teknologi Vol 6, No 3 (2023): November 2023
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jgt.6.3.2023.174-185

Penelitian ini terletak di wilayah Tobimeita, Kabupaten Konawe Utara, Provinsi Sulawesi Tenggara yang secara litologi tersusun atas batuan ultramafik yang menjadi host endapan nikel laterit. Tujuan penelitian ini untuk mengidentifikasi ketebalan endapan nikel laterit berdasarkan kondisi morfologi pada daerah penelitian. Ketebalan endapan nikel laterit dilakukan dengan menggunakan analisis geokimia XRF (X- Ray Flourescence sedangkan kemiringan lereng menggunakan analisis morfometri dan morfografi. Hasilnya, bahwa morfologi pada daerah penelitian terdiri dari morfologi perbukitan dengan kemiringan lereng datar, agak landai, landai, agak curam dan curam. Wilayah pada kemiringan lereng agak landai dan landai menghasilkan ketebalan endapan laterit relatif tebal disebabkan oleh air yang berada di atas permukaan yang bergerak perlahan sehingga air akan mempunyai kesempatan melakukan penetrasi lebih dalam hingga ke bawah permukaan sehingga menyebabkan pelapukan menjadi intensif. Adapun pada kemiringan lereng agak curam dan curam memiliki ketebalan endapan laterit yang tipis. Ketebalan endapan nikel laterit pada lereng agak landai dan landai pada zona limonit dan saprolit yaitu 10 – 13 m dengan kadar Ni pada zona limonit sebesar 1,99% dan zona saprolit 2,13%. Adapun ketebalan endapan nikel laterit pada kemiringan lereng agak curam dan curam yakni 0 – 2 m dengan kandungan Ni pada zona limonit 1,01 % dan 1,46 % pada zona saprolit.

Mineralogi dan Properti Keteknikan Endapan Nikel Laterit Daerah Tobimeita-Langgikima, Kabupaten Konawe Utara, Sulawesi Tenggara Masri, Masri; Mili, Marwan Zam; Awaliah, Waode Rizky; Tugo, Laode Jonas; Rifai, Laode Ahmad
Geosapta Vol 9, No 2 (2023): JULI 2023
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jg.v9i2.14860

Pembentukan profil nikel laterit merupakan fungsi pelapukan batuan ultramafik yang dapat menyebabkan perubahan nilai properti keteknikan pada setiap zona profil. Penelitian ini bertujuan untuk menentukan korelasi mineralogi, sifat fisik, dan sifat mekanik terhadap derajat pelapukan pada setiap zona laterit. Penyusunan profil laterit ditentukan melalui deskripsi singkapan dan analisis kimia unsur menggunakan XRF. Batuan dasar diidentifikasi menggunakan analisis petrografi sayatan tipis. Analisis X-Ray Diffraction (XRD) digunakan untuk menentukan komposisi mineral penyusun profil laterit. Pengujian properti keteknikan mencakup uji indeks plastisitas, bobot isi, uji kuat tekan, dan uji kuat geser. Hubungan antara derajat pelapukan dan properti keteknikan dianalisis menggunakan fungsi regresi dan koefisien determinasi (R2). Daerah penelitian tersusun oleh dunit terserpentinisasi dan werlit terserpentinisasi. Profil nikel laterit berupa zona limonit, zona saprolit, dan batuan dasar. Zona limonit dan saprolit tersusun oleh lanau inorganik dengan plastisitas sedang hingga tinggi. Peningkatan derajat pelapukan berkorelasi positif dengan nilai indeks plastisitas, diikuti penurunan nilai bobot isi, kohesi, dan sudut geser dalam yang dinyatakan dalam fungsi regresi linear.

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

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.

Geodiversity Inventory and Scientific Value Evaluation of Southern Binongko Island in Wakatobi Regency Masri, Masri; Asruddin, La Ode; Ngkoimani, La Ode
Jurnal Lingkungan dan Bencana Geologi Vol 15, No 1 (2024)
Publisher : Badan Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34126/jlbg.v15i1.466

Binongko Island is one of the largest islands in Wakatobi Regency, Southeast Sulawesi, with unspoiled and exotic natural tourism. Several tourism objects are karstification products from the Ambeua Formation (Tmpa) and Quaternary (Qpl) limestone. To determine the potential of geodiversity on the island, an inventory and scientific value assessment were conducted. This paper presents the results of the inventory and evaluation of geological diversity as a potential geological heritage on Southern Binongko Island. The methods involve field geological mapping and laboratory analysis.. Field geological mapping include geological trajectory planning, lithology data collection, cave geometry descriptions, and preparation of geological diversity inventory matrices. Laboratory analysis includes observing the thin section using microscope polarization. The geomorphological units of the study area can be divided into karst hills and karst plains. Petrographic analysis of nine thin sections showed crystalline limestone units, grainstone, packstone, wackestone, and mudstone—geological structures in limestone terraces with different lithological variations. The geological diversity of the study area is divided into groups of endokarst cave, karst hills, beaches, and limestone terraces which are divided into 11 (eleven) geological sites, i.e., Topa Raja Cave, Topa Lemali Cave, Topa Lembuko Cave, Wa Ode Goa Cave, Yoro Beach, Koncu Patua Wali Hill, Mbara-mbara Beach, La Sikori Cave, Rock Park, La Handu Hill, and Wa Cimbaumba Beach. Geological sites in the study area have medium to high values.The comparison is based on the criteria of geological heritage (geoheritage); the research area is ranked nationally,with a low, medium, and high scientific value. The highest scientific value is in the Taman Batu geosite and KoncuPatua Wali Hills. Three geotracks are recommended: cave geotrack, rock garden hill geotrack, and beach geotrack.

Studi paragenesis serpentin pada batuan utramafik Kompleks Ofiolit Daerah Baula dan Pomalaa, Sulawesi Tenggara Masri; Irhan Mais Cendra Jaya, Rio; Ihksan Juarsan, Laode; Razak Haraty, Syamsul; Pramadana, Reza; Hasria
Jurnal Geologi dan Sumberdaya Mineral Vol. 25 No. 2 (2024): JURNAL GEOLOGI DAN SUMBERDAYA MINERAL
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v25i2.761

Serpentinisasi merupakan proses hidrasi pada batuan ultramafik yang mengubah komposisi mineral primer. Pembentukan mineral serpentin pada batuan ultramafik dapat menunjukkan proses pengalihtempatan dan karakteristik profil nikel laterit yang dapat dihasilkan. Studi paragenesis mineral serpentin telah dilakukan pada batuan ultramafik kompleks ofiolit daerah baula – pomalaa. Studi paragenesis mencakup kebutuhan jenis mineral serpentin dan asosiasi mineral ubahan lain yang hadir. Tekstur dan struktur khas pada serpentin juga dianalisis menggunakan analisis petrografi pada 10 sampel sayatan tipis. Daerah penelitian tersusun atas harzburgite dan lherzolite terserpentinisasi dengan kandungan serpentin berkisar antara 22%-62%. Serpentin yang hadir berupa lizardit, antigorite, dan krisotil bersama mineral ubahan lain seperti talk, klorit, magnesit, dan hematit. Tekstur pseudomorph dan mesh rim pada olivine menunjukkan ciri serpentinisasi bertemperatur tinggi diikuti tekstur bastit pada ortopiroksen. Hadirnya berbagai tipe serpentin vena yang didominasi oleh krisotil dan magnesit disertai struktur tikungan ketegaran menunjukkan proses serpentinisasi terbentuk oleh pengaruh deformasi. Kehadiran hematit, magnesit, dan granular lizardit disertai kehadiran vein tipe 3 menunjukkan proses awal pelapukan ultramafik. Pada sayatan juga menunjukkan subproses hidrasi dan rekristalisasi serpentin yang menunjukkan tipe serpentinisasi retrograde. Kehadiran tipe mineral serpentin, tekstur, struktur, dan tipe berbagai vein serpentin dapat digunakan untuk interpretasi paragenesis dan derajat serpentinisasi pada batuan ultramafik di daerah penelitian. Tekstur pseudomorph dan mesh rim pada olivine menunjukkan ciri serpentinisasi bertemperatur tinggi diikuti tekstur bastit pada ortopiroksen. Hadirnya berbagai tipe serpentin vena yang didominasi oleh krisotil dan magnesit disertai struktur tikungan ketegaran menunjukkan proses serpentinisasi terbentuk oleh pengaruh deformasi. Kehadiran hematit, magnesit, dan granular lizardit disertai kehadiran vein tipe 3 menunjukkan proses awal pelapukan ultramafik. Pada sayatan juga menunjukkan subproses hidrasi dan rekristalisasi serpentin yang menunjukkan tipe serpentinisasi retrograde. Kehadiran tipe mineral serpentin, tekstur, struktur, dan tipe berbagai vein serpentin dapat digunakan untuk interpretasi paragenesis dan derajat serpentinisasi pada batuan ultramafik di daerah penelitian. Tekstur pseudomorph dan mesh rim pada olivine menunjukkan ciri serpentinisasi bertemperatur tinggi diikuti tekstur bastit pada ortopiroksen. Hadirnya berbagai tipe serpentin vena yang didominasi oleh krisotil dan magnesit disertai struktur tikungan ketegaran menunjukkan proses serpentinisasi terbentuk oleh pengaruh deformasi. Kehadiran hematit, magnesit, dan granular lizardit disertai kehadiran vein tipe 3 menunjukkan proses awal pelapukan ultramafik. Pada sayatan juga menunjukkan subproses hidrasi dan rekristalisasi serpentin yang menunjukkan tipe serpentinisasi retrograde. Kehadiran tipe mineral serpentin, tekstur, struktur, dan tipe berbagai vein serpentin dapat digunakan untuk interpretasi paragenesis dan derajat serpentinisasi pada batuan ultramafik di daerah penelitian. Hadirnya berbagai tipe serpentin vena yang didominasi oleh krisotil dan magnesit disertai struktur tikungan ketegaran menunjukkan proses serpentinisasi terbentuk oleh pengaruh deformasi. Kehadiran hematit, magnesit, dan granular lizardit disertai kehadiran vein tipe 3 menunjukkan proses awal pelapukan ultramafik. Pada sayatan juga menunjukkan subproses hidrasi dan rekristalisasi serpentin yang menunjukkan tipe serpentinisasi retrograde. Kehadiran tipe mineral serpentin, tekstur, struktur, dan tipe berbagai vein serpentin dapat digunakan untuk interpretasi paragenesis dan derajat serpentinisasi pada batuan ultramafik di daerah penelitian. Hadirnya berbagai tipe serpentin vena yang didominasi oleh krisotil dan magnesit disertai struktur tikungan ketegaran menunjukkan proses serpentinisasi terbentuk oleh pengaruh deformasi. Kehadiran hematit, magnesit, dan granular lizardit disertai kehadiran vein tipe 3 menunjukkan proses awal pelapukan ultramafik. Pada sayatan juga menunjukkan subproses hidrasi dan rekristalisasi serpentin yang menunjukkan tipe serpentinisasi retrograde. Kehadiran tipe mineral serpentin, tekstur, struktur, dan tipe berbagai vein serpentin dapat digunakan untuk interpretasi paragenesis dan derajat serpentinisasi pada batuan ultramafik di daerah penelitian. dan granular lizardit disertai kehadiran vein tipe 3 menunjukkan proses awal pelapukan ultramafik. Pada sayatan juga menunjukkan subproses hidrasi dan rekristalisasi serpentin yang menunjukkan tipe serpentinisasi retrograde. Kehadiran tipe mineral serpentin, tekstur, struktur, dan tipe berbagai vein serpentin dapat digunakan untuk interpretasi paragenesis dan derajat serpentinisasi pada batuan ultramafik di daerah penelitian. dan granular lizardit disertai kehadiran vein tipe 3 menunjukkan proses awal pelapukan ultramafik. Pada sayatan juga menunjukkan subproses hidrasi dan rekristalisasi serpentin yang menunjukkan tipe serpentinisasi retrograde. Kehadiran tipe mineral serpentin, tekstur, struktur, dan tipe berbagai vein serpentin dapat digunakan untuk interpretasi paragenesis dan derajat serpentinisasi pada batuan ultramafik di daerah penelitian. Kata Kunci : Serpentinisasi, lerzolit, granular lizardit, ultramafik, retrograde, Kolaka

POTENSI DAN PROBABILITAS KELONGSORAN LERENG TAMBANG KUARI BATUGAMPING DI DAERAH MORAMO UTARA, SULAWESI TENGGARA Masri, Masri; Mili, Marwan Zam; Nafiu, Waode Rizky Awaliah; Wahab, Wahab; Agriawan, Husran; Ngkoimani, La Ode
Jurnal Teknologi Mineral dan Batubara Vol 20 No 2 (2024): Jurnal Teknologi Mineral dan Batubara Edisi Mei 2024
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/jtmb.Vol20.No2.2024.1550

Demolition of limestone fragments in quarries can cause slope stability issues. This study aims to identify the potential for rock failures and determine the probability of failures on three quarry slopes. The type of rock failures was identified using kinematics analysis. Determining the probability of failures is also required to accommodate the uncertainty of input parameters in the factor of safety calculation. The probability of failure was determined using the limit equilibrium method and chi-square tests to fit shear strength curves on the discontinuities. The Barton-Bandis criterion was used to determine the shear strength of the discontinuities. On the slopes, the discontinuity types are bedding, joint, and shear fractures. Kinematics analysis of slope-1 and slope-2 revealed the possibility of wedge failures with an occurrence probability ranging from 19.80 to 20.81%. On slope 3, a planar failure possibility with a 69.49% of occurrence probability was identified. Even though the kinematics analysis suggested the possibility of rock failures, the factor of safety on all three slopes was above the threshold (7.28 – 30.58) with probability of failure ranging from 0 – 6.14%. Based on sensitivity analysis, factor of safety is most influenced by changes in the bedding cohesion. Variations in groundwater recharge at discontinuities also influence the factor of safety and the probability of failures, particularly in planar failures. It is recommended to evaluate other types of rock failures, such as the potential of rockfalls.

POTENSI DAN PROBABILITAS KELONGSORAN LERENG TAMBANG KUARI BATUGAMPING DI DAERAH MORAMO UTARA, SULAWESI TENGGARA Masri, Masri; Mili, Marwan Zam; Nafiu, Waode Rizky Awaliah; Wahab, Wahab; Agriawan, Husran; Ngkoimani, La Ode
Jurnal Teknologi Mineral dan Batubara Vol 20 No 2 (2024): Jurnal Teknologi Mineral dan Batubara Edisi Mei 2024
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/jtmb.Vol20.No2.2024.1550

Demolition of limestone fragments in quarries can cause slope stability issues. This study aims to identify the potential for rock failures and determine the probability of failures on three quarry slopes. The type of rock failures was identified using kinematics analysis. Determining the probability of failures is also required to accommodate the uncertainty of input parameters in the factor of safety calculation. The probability of failure was determined using the limit equilibrium method and chi-square tests to fit shear strength curves on the discontinuities. The Barton-Bandis criterion was used to determine the shear strength of the discontinuities. On the slopes, the discontinuity types are bedding, joint, and shear fractures. Kinematics analysis of slope-1 and slope-2 revealed the possibility of wedge failures with an occurrence probability ranging from 19.80 to 20.81%. On slope 3, a planar failure possibility with a 69.49% of occurrence probability was identified. Even though the kinematics analysis suggested the possibility of rock failures, the factor of safety on all three slopes was above the threshold (7.28 – 30.58) with probability of failure ranging from 0 – 6.14%. Based on sensitivity analysis, factor of safety is most influenced by changes in the bedding cohesion. Variations in groundwater recharge at discontinuities also influence the factor of safety and the probability of failures, particularly in planar failures. It is recommended to evaluate other types of rock failures, such as the potential of rockfalls.

Implementasi Pelatihan Petrologi Untuk Pengembangan Keterampilan Deskripsi Batuan Pada Siswa SMK Negeri 6 Kendari Masri, Masri; Okto, Ali; Jaya, Rio Irhan Mais Cendra; Hasria, Hasria; Muliddin, Muliddin; Sahiddin, La Ode; Suwardi, Wa Ode; Atodding, Wa Ode Sitti Jumrana
Journal of Community Development Vol. 6 No. 1 (2025): August
Publisher : Indonesian Journal Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47134/comdev.v6i1.1388

A rock description training has been conducted at SMK Negeri 6 Kendari to enhance fundamental petrology knowledge and descriptive skills among students in the Mining Geology program. This training involved 47 senior-level students and was implemented through several stages, including preparation, material presentation, rock description practicum, and outcome evaluation via written exam and analytical rubric assessment. The training comprised theoretical and practical sessions focused on the description of three rock groups (igneous, sedimentary, and metamorphic) using hand specimens and thin sections. The analysis demonstrates a significant enhancement in students' comprehension, as reflected in the increase in the average post-test score to 62.02, compared to the pre-test score of 45.74. An improvement in descriptive skills was also evident based on the evaluation rubric, with a greater number of students achieving the "Intermediate" proficiency level, characterized by scores exceeding 39, following the training. Statistical analysis using a paired t-test revealed a p-value <0.05, with the t-statistic substantially exceeding the critical threshold, affirming that the training had a significant impact on improving students’ knowledge and descriptive competencies in rock examination. It is recommended that future training programs focus on advanced modules, particularly those emphasizing rock interpretation, to further enhance students’ proficiency in rock description.

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): JGEET Vol 10 No 01 : March (2025)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2025.10.1.19484

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

Assessing the environmental impact of Kolaka peridotites from nickel mining waste for geological carbon storage: Mineralogy, carbonation potential, and rock property changes Deniyatno, Deniyatno; Masri, Masri; Jaya, Rio Irhan Mais Cendra; Wahab, Wahab; Syahrul, Syahrul
Journal of Degraded and Mining Lands Management Vol. 12 No. 5 (2025)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2025.125.8899

This study investigated the carbonation potential of peridotite from the Kolaka Ultramafic Complex in Sulawesi, Indonesia, for carbon capture and storage (CCS) applications. Peridotites, particularly those enriched in magnesium, are known for their high reactivity with CO?, forming stable mineral carbonates. However, the Kolaka region’s peridotites have not been thoroughly assessed for their carbonation prospects. This research addresses this gap by examining the petrology, geochemistry, and physical-magnetic properties of peridotite, focusing on its serpentinization and carbonation characteristics. An integrated approach applying petrographic analysis, X-ray fluorescence (XRF), X-ray diffraction (XRD), scanning electron microscopy (SEM), Schmidt hammer, and magnetic susceptibility tests, was used to determine the mineral composition, specifically the carbonation minerals, and the changes in the physical properties of the rocks during carbonation. The results showed that the peridotites, particularly serpentinized lherzolites, exhibit high carbonation potential characterized by the abundance of magnesium-rich olivine-pyroxene minerals. Carbonation reactions are characterized by the presence of magnesite and brucite, leading to significant changes in rock strength and magnetic susceptibility. Carbonation occurs by an advanced serpentinization process, which increased mineral reactivity and leads to reducing uniaxial compressive strength (UCS). Additionally, magnetic susceptibility exhibits positive correlation with serpentinization, accompanied by magnetite formation. These findings suggest that Kolaka's serpentinized peridotite, as mining waste, is a viable candidate for CO? storage. The ex-situ carbonation mechanism allows Kolaka's fine-grained peridotite to capture CO?, while also improving nickel ore recovery, minimizing dust, neutralizing acid mine drainage, and enhancing soil quality.

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