Jahidin Jahidin
Teknik Geofisika, Universitas Halu Oleo

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Analisa Keterdapatan Batugamping Menggunakan Metode Resistivitas Pada Blok A Area Penambangan PT Graha Batu Perdana Kecamatan Bungku Pesisir Kabupaten Morowali Tesalonika Mangnga Tolan; Jahidin Jahidin; Erzam Salahudin Hasan
Jurnal Rekayasa Geofisika Indonesia Vol. 5 No. 03 (2023): Edisi Desember Jurnal Rekayasa Geofisika Indonesia (JRGI)
Publisher : Program Studi Teknik Geofisika FITK UHO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56099/jrgi.v5i03.18

Abstract

This research was conducted to determine the resistivity values and the presence of limestone in Block A of PT Graha Batu Perdana mining area, Bungku Pesisir Subdistrict, Morowali Regency, using the Wenner-Schlumberger resistivity method. This study utilized secondary data and falls under the category of data processing studies, with measurements conducted along 4 traverses, each with a length of 310 m. The data obtained consisted of potential difference values and current strength, which were then processed using Microsoft Excel to obtain resistivity values. Subsequently, a 2D processing was carried out using res2Dinv to generate a 2D cross-section, which was then interpreted to identify subsurface conditions based on resistivity values. The distribution of limestone in the research area along 4 traverses is as follows traverse 1 had a resistivity value of 694 Ωm with a thickness of 30,14 m, traverse 2 had resistivity values ranging from 1089 to 2350 Ωm with thinknesses between 28,15 and 43,14 m, traverse 3 had resistivity values ranging from 544 to 15108 Ωm with thinknesses between 1,25 and 39,4 m, traverse 4 had resistivity values ranging from 710 to 3325 Ωm with thinknesses between 38,15 m.
Estimasi Sumber Daya Lapisan Laterit Menggunakan Data Resistivitas di Desa Morombo Pantai Konawe Utara Juan Gilbert; Jahidin Jahidin; Al Rubaiyn
Jurnal Rekayasa Geofisika Indonesia Vol. 6 No. 01 (2024): Edisi Arpil JRGI (Jurnal Rekayasa Geofisika Indonesia)
Publisher : Program Studi Teknik Geofisika FITK UHO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56099/jrgi.v6i01.60

Abstract

This research was conducted in Morombo Pantai Village, Langgikima District, North Konawe Regency which aims to model nickel laterite deposits in 2D and 3D to describe the distribution of nickel laterite deposits in the subsurface based on resistivity values. The inversion process uses Res2DInv software to produce 2D ERT cross-sections and the distribution of resistivity values that provide an overview of the lithology in the subsurface. These results were then correlated with local coordinates and modeled in 3D using Rockworks17 software. The results show the distribution of laterite deposits with thicknesses ranging from 1.63 m to 59 m that spread from north to south. Based on the 3D modeling results, it is known that the resource of nickel laterite deposits at the research site reaches 2,931,836.0 m3 for the limonite layer and 3,820,284.0 m3 for the saprolite layer