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Influence of Laterite Bedrock on Ni Content in Langgikima District, North Konawe Regency, Southeast Sulawesi, Indonesia Hasria; Okto, Ali; Rio Irhan Mais Cendra Jaya; Alamyah, Wa Ode Nur; Safar, Muhamad; Septiana, Sara; Syahrul
Journal of Geoscience, Engineering, Environment, and Technology Vol. 10 No. 4 (2025): JGEET Vol 10 No 04 : December (2025)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2025.10.4.24735

Abstract

This study investigates the influence of bedrock on nickel (Ni) content in laterite deposits in the Lameruru Region, Langgikima District, North Konawe Regency, Southeast Sulawesi Province, Indonesia. The research area is dominated by ultramafic rocks, which are potential sources of laterite nickel. The study employs literature review, field surveys for lithological data collection and representative sampling, petrographic analysis to determine mineral composition and rock types, and geochemical analysis using X-Ray Fluorescence (XRF) to determine nickel content in the rocks. The results show that the bedrock in the study area consists of harzburgite and olivine pyroxenite. Harzburgite, occupying approximately 72.72% of the area, is composed of 54-78% olivine, 15-45% orthopyroxene, 6% clinopyroxene, and accessory minerals, while olivine pyroxenite, occupying about 27.28% of the area, is composed of 27% olivine, 49% orthopyroxene, 17% serpentine, and 7% spinel. Geochemical analysis reveals that harzburgite has higher Ni content (0.10-0.16%) compared to olivine pyroxenite (0.03-0.10%). The distribution of Ni in the bedrock and saprolite is directly proportional, with higher Ni content in harzburgite in both zones. The study concludes that the type of bedrock greatly influences the nickel content in laterite deposits, with harzburgite having a higher Ni content due to its higher percentage of olivine minerals, which are the main hosts of nickel in ultramafic rocks.
Co-Authors Achmad Lutfi Fuadi Ahmad Rudiyansyah Al Firman Alamyah, Wa Ode Nur Ali Okto Arisona Arisona Arisona Astuti, Silfia Bahdad Chintya Mei Eldin Fiqriawan, M. Ridho G.M. Lucki Junursyah, G.M. Lucki Hafizh Agil Musyaffa Harisma Hasir, Muhammad Ihksan Juarsan, Laode Irwan Hardi Kusuma Isman Saleh Jaya, Rio Irhan Mais Cendra Juarsan, Laode Ihksan Juarzan, Laode Ihksan La Hamimu La Ode Ngkoimani, La Ode Lulu Kaoniah Masri Masri Masri Muhamad Safar Muliddin NENI Ngkoimani , La Ode Novariman Nur Firdaus, Amritzal Okto, Ali P. Ramba, Jeremy Patrio Praja, Nia Kurnia Pramadana, Reza Prawira, Andi Bhaskara Ramadani, Suci Razak Haraty, Syamsul Rubaiyn, Al Safani, Jamhir Sara Septiana Septiana, Sara Syahrul Tian Agustina Zhaki Apriyan Zhodik