The Delineation of Nickel Laterite Deposits Based on Geoelectric Method in Area “X”, Southeast Sulawesi, Indonesia
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Sustainable nickel exploration is urgently needed as the demand for nickel in Indonesia increases. Area “X” Southeast Sulawesi, Indonesia, is one of the nickel producer areas in Indonesia. A geophysical exploration method that can effectively and efficiently increase the discovery of laterite nickel potential is the Electrical Resistivity Tomography (ERT) or the resistivity geoelectric method. ERT measurements in the study area were carried out to see the potential of nickel laterite deposits that can be mined. ERT measurements were carried out as many as 6 lines, and there was drill data as many as 5 drill points in the study area. Data processing of resistivity values using Res2DInv software, then made resistivity cross-section, lithology cross-section, resistivity cross-section vs. drill data, correlation of paths, depth slicing map, and 3D modeling for each layer of nickel laterite. The results showed that the study area contained limonite, saprolite, saprock, and bedrock layers. The resistivity value in the limonite layer is (61 – 150) Ohm.m, the saprolite layer is (1 – 60) Ohm.m, the saprock layer is (61 – 150) Ohm.m, and the bedrock layer has a resistivity value of more than 150 Ohm.m. The distribution of nickel laterite deposits consisting of limonite, saprolite, and saprock in the study area is thicker to the east. Nickel laterite deposits in the eastern zone have a thickness of about 60 meters, while in the western zone, it has a thickness of about 10 meters. This is due to the indication of a southwest-northeast oriented fault, so the western zone has a higher morphology than the eastern zone.
Ahmad, Waheed. 2006. Laterites: Fundamentals of Chemistry, Mineralogy, Weathering Processes and Laterite Formation.
Elias, M. 2002. “Nickel Laterite Deposits-Geological Overview, Resources and Exploitation.”
Fitrian, Eltrit Bima. 2021. “Identifikasi Sebaran Nikel Laterit Dan Volume Bijih Nikel Menggunakan Korelasi Data Bor.” Paulus Civil Engineering Journal 3(1). http://ojs.ukipaulus.ac.id/index.php/pcej.
Hasria, Masrandi Resmin, Ali Okto, Masri Masri, Arisona, Al Al Firman, Harisma, et al. 2024. “Pengaruh Kemiringan Lereng Terhadap Ketebalan Endapan Nikel Laterit Daerah Tobimeita, Kecamatan Langgikima, Kabupaten Konawe Utara, Provinsi Sulawesi Tenggara.” Jurnal Geosains dan Teknologi 6(3): 174–85.
doi:10.14710/jgt.6.3.2023.174-185.
Isjudarto, A. 2013. “Pengaruh Morfologi Lokal Terhadap Pembentukan Nikel Laterit.” Seminar Nasional Ke-8 Rekayasa Teknologi Industri dan Informasi.
Nabila, Sitti, Pou Anda, and Syamsul Razak Haraty. 2020. “Identifikasi Profil Nikel Laterit Menggunakan Metode Geolistrik Tahanan Jenis Daerah Tambang Pt. Cash, Kecamatan Puriala, Kabupaten Konawe, Sulawesi.” Jurnal Rekayasa Geofisika Indoensia 02(03).
Okto, Ali, Bahdad Bahdad, Syamsul Razak, Sahiddin Sahiddin, and Jonas Tugo. 2023. “Pengkayaan Unsur Logam Tanah Jarang Kobalt (Co) Pada Profil Laterit Di Kecamatan Kolaka Utara.” Jurnal GEOSAPTA 9(2): 127. doi:10.20527/jg.v9i2.14861.
Ramadhani, Ayumi Hana Putri, Andi Cahyadi, and Tatik Handayani. 2023. “Makalah Ilmiah Karakteristik Endapan Bijih Besi Laterit Pada Blok Barat Dan Blok Timur PT. Silo, Kabupaten Kotabaru, Kalimantan Selatan Berdasarkan Analisis Geokimia Dan Minerologi.” Buletin Sumber Daya Geologi 18(3): 183–96.
doi:10.47599/bsdg.v18i3.425.
Reynolds, John M. 2011. An Introduction to Applied and Environmental Geophysics. 2nd ed. New York: John Wiley and Sons.
www.wiley.com/go/reynolds/introduction2e.
Salsabila, Firyal Hana. 2021. “Pemodelan 2D Endapan Nikel Laterit Di Daerah Pomalaa, Kolaka, Sulawesi Tenggara Menggunakan Metoda Geolistrik Resistivitas.” Universitas Islam Negeri Syarif Hidayatullah Jakarta.
Santoso, Budy, and Subagio. 2018. “Pemodelan Nikel Laterit Berdasarkan Data Resistivitas Di Daerah Kabaena Kabupaten Bombana, Provinsi Sulawesi.” Jurnal Geologi dan Sumberdaya Mineral 19(3): 148–61.
doi:10.33332/jgsm.geologi.19.3.148-158.
Santoso, Budy, Bambang Wijatmoko, and Eddy Supriyana. 2017. “Kajian Nikel Laterit Dengan Metode Electrical Resistivity Tomography Di Daerah Batu Putih, Kolaka Utara, Sulawesi Tenggara.” Jurnal Material dan Energi Indonesia 7(1): 24–30.
Surono. 2013. Geologi Lengan Tenggara Sulawesi. Bandung: Badan Geologi, Kementerian Energi dan Sumber Daya Mineral.
Telford, W.M, L.P Geldart, and R.E Sheriff. 1990. Applied Geophysics. 2nd ed. Cambridge: Press Syndicate of The University of Cambridge .
Umar, Emi Prasetyawati, Jamaluddin Jamaluddin, Muhardi Mustafa, Muhammad Adam Marnas, Intan Noviantari Manyoe, Aryadi Nurfalaq, and Ivan Taslim. 2019. “Kajian Mitigasi Bencana Tanah Longsor Ruas Jalan Meluhu-Lasolo, Sulawesi Tenggara.” Jurnal Geocelebes 3(2): 51. doi:10.20956/geocelebes.v3i2.6946.
USGS, Badan Survei Geologi Amerika Serikat. 2023. “Daftar Negara Produsen Nikel Terbesar Di Dunia (2022).”
