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All Journal Jurnal Rekayasa Geofisika Indonesia
Erzam Salahudin Hasan
Teknik Geofisika, Universitas Halu Oleo
Computer Science & IT Earth & Planetary Sciences Engineering Physics

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Analisis Konsentrasi Logam Berat pada Permukaan Tanah Berdasarkan Nilai Suseptibilitas Magnetik di Pesisir Teluk Lasolo dan Sekitarnya Aziza Nur Aziza; Irawati Irawati; 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.v5i03.14

Abstract

This research is located in Lasolo Bay, that is at Tapuemea Village, Molawe District, North Konawe Regency. The purpose of the study was to determine the concentration of heavy metals based on magnetic susceptibility values using X-Ray Fluorescence (XRF) and determine sediment quality. The results of XRF measurements showed that the highest concentrations of heavy metals for mining zones, coastal zones and residential zones were Nickel (Ni), Iron (Fe) and Cobalt (Co), while heavy metals that did not exceed the maximum threshold were Copper (Cu) and Zinc (Zn). Sediment quality as seen from the Pollution Load Index (PLI) analysis is included in the polluted category with a geoaccumulation index value indicating that there has been pollution with moderate to extremely severe pollution categories.
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.
Co-Authors Aziza Nur Aziza Irawati Irawati Jahidin Jahidin Tesalonika Mangnga Tolan