PEMODELAN DAN ESTIMASI CADANGAN NIKEL LATERIT PADA BLOK A5 PT. JAGAD RAYATAMA PROVINSI SULAWESI TENGGARA
Keywords:
Nickel Laterite, Reserve Estimation, Deposits ModellingAbstract
PT. Ja gad Rayatama is one of the companies engaged in the nickel mining industry with a mining business license (IUP) area of 1,661.89 Ha. Currently, the company plans to open a new mining area in block A5 to continue mining activities when other blocks have/will reach the mineout category. This study aims to determine the amount of reserves and the form of distribution of nickel laterite deposits contained in the A5 block. The research method is quantitative research that combines theory with data obtained in the field. As for the reserve estimation, the inverse distance weighted (IDW) method is used, which is determined based on geological conditions and the results of statistical analysis that has been carried out. This research uses data in the form of drill data as many as 42 points, topographic data, and pay attention to the morphology, structure, and lithology of the research area which are then processed in the modeling software. From the results of modeling and data analysis, it is known that the amount of laterite nickel reserves contained in Block A5 PT Jagad Rayatama is 296,343.75 tons. The reserves are spread into three ore classes whose details are 115,263.67 tons of Low Grade Ore (LGO) material with an average Ni grade is 1.53% which is spread fairly evenly in the A5 Block area, 55,507.81 tons of Medium Grade Ore (MGO) material with an average Ni grade is 1.79% with the direction of distribution to the east and north, and 125,572.27 tons of High Grade Ore (HGO) material with an average Ni grade is 2.24% which has a distribution direction to the east and north.
References
A. Isjudarto, “Pengaruh Morfologi Lokal Terhadap Pembentukan Nikel Laterit,” J. Kurvatek, vol. 8, pp. 10–14, 2013.
C. R. M. Butt and D. Cluzel, “Nickel Laterite Ore Deposits: Weathered Serpentinites,” Elements, vol. 9, no. 1811–5209, pp. 123–128, 2013.
N. Anbiyak and T. Cahyaningrum, “Identifikasi Zona Kaya Kobalt Pada Cebakan Nikel Laterit Di Indonesia,” Indones. Min. Prof. J., vol. 2, no. 2, pp. 75–84, 2021
F. Rinawan, H. Nugroho, and R. Wibawa, “Pemodelan Tiga Dimensi (3D) Potensi Laterit Nikel Studi Kasus: Pulau Pakal, Halmahera Timur, Maluku Utara,” J. Itenas Rekayasa, vol. 18, no. 1, 2014.
F. Rahmi and D. Yulhendra, “Optimalisasi Pit Limit Penambangan Mineral Nikel Laterit PT ANTAM Tbk . Unit Bisnis Penambangan Nikel Di Site Pomalaa Sulawesi Tenggara Di Front X,” J. Bina Tambang, vol. 4, no. 3, pp. 294–305, 2018.
R. M. Afif and A. Octova, “Estimasi Sumberdaya Bijih Besi Menggunakan Metode Ordinary Krigging di PT. Gamindra Mitra Kesuma, Kec. Sungai Beremas, Kab. Pasaman Barat, Sumatera Barat,” J. Bina Tambang, vol. 4, no. 3, 2019.
T. Hidayanti, I. Handayani, and I. H. Ikasari, Statistika Dasar Panduan Bagi Dosen dan Mahasiswa, vol. 53, no. 9. 2013.
P. Darling, SME Mining Engineering Handbook Third Edition. 2011.
J. M. Pasaribu and N. S. Haryani, “Perbandingan Teknik Interpolasi DEM SRTM dengan Metode Inverse Distance Weighted (IDW), Natural Neighbor dan Spline (Comparison of DEM SRTM Interpolation Techniques Using Inverse Distance Weighted (IDW), Natural Neighbor and Spline Method),” J. Penginderaan Jauh dan Pengolah. Data Citra Digit., vol. 9, no. 2, pp. 126–139, 2012.
T. J. Souza, J. A. C. C. Medeiros, A. C. Gonçalves, and A. S. Martinez, “A method to identify an accidental control rod drop with inverse distance weighted interpolation,” Ann. Nucl. Energy, vol. 145, 2020.
E. Respatti, R. Goejantoro, and S. Wahyuningsih, “Perbandingan Metode Ordinary Kriging dan Inverse Distance Weighted untuk Estimasi Elevasi Pada Data Topografi ( Studi Kasus : Topografi Wilayah FMIPA Universitas Mulawarman ),” J. EKSPONENSIAL, vol. 5, 2014.
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