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All Journal Jurnal Ilmiah Giga Journal of Geoscience, Engineering, Environment, and Technology Indonesia Berdampak: Jurnal Pengabdian Kepada Masyarakat
Munarfan, ZA
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Humanities Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Engineering Environmental Science Physics Social Sciences Other

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Identifikasi Lapisan Akuifer Air Tanah menggunakan Metode Resistivitas di Dusun Puaringan, Desa Pelangan, Lombok Barat Erintina, Melinda Dwi; Sismanto, Sismanto; Ubaidillah, Aji Syailendra; Hidayat, Syamsul; Faesal, Andi; Munarfan, ZA; Hermansyah, Wahyu; Syarbini, Khatib; Dermawan, Iwan; Anggraeni, Juraedah Dwi; Gunawan, Hendra
Jurnal Ilmiah Giga Vol. 28 No. 1 (2025): Volume 28 Edisi 1 Tahun 2025
Publisher : Universitas Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47313/jig.v28i1.4241

Abstract

The aim of this study is to identify the groundwater aquifer layer using the resistivity method in Puaringan, Pelangan Village, West Lombok. The aquifer layer is a layer of rock that has the ability to store groundwater well. This layer also tends to have high porosity so that fluid/water is trapped in the layer. The resistivity method used is vertical electric sounding (VES). This method is effective in detecting the subsurface vertically. Data acquisition was carried out using two sounding points (S1 and S2). Sounding points S1 and S2 were processed using IP2WIN software to produce a picture of the subsurface rock layer. The results of the S1 point study showed that the groundwater aquifer layer was at a depth of 113-126 meters identified as a sandstone layer. The results of the S2 point study showed that the groundwater aquifer layer was at a depth of 105-198 meters identified as a sandstone layer.
Sensitivity Analysis of Phase 5 Batu Hijau Pit Walls Khatib Syarbini; Faesal, Andi; Za Munarfan Putra; Syamsul Hidayat; Hermansyah, Wahyu; Erintina, Melinda Dwi; Ubaidillah, Aji Syailendra; Dermawan, Iwan; Azhari, Uraihan; Hakim, Muhammad Samsul
Journal of Geoscience, Engineering, Environment, and Technology Vol. 10 No. 02 (2025): JGEET Vol 10 No 02 : June (2025)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2025.10.02.21571

Abstract

The Batu Hijau mine, an extensive copper-gold operation in West Sumbawa, Indonesia, employs an open-pit mining method and is characterized by its significant pit dimensions, with planned slope heights reaching up to 1000 meters. Given the scale of the operation, maintaining slope stability is critical, influenced by stress on the pit slopes, geological structures, mine geometry, and rock mass strength. This study investigates the impact of groundwater on slope stability, emphasizing the role of groundwater pressure in reducing shear strength and consequently affecting slope stability. A comprehensive sensitivity analysis was conducted to evaluate the influence of groundwater pressures on the stability of the Batu Hijau pit walls. This analysis utilized the SLIDE® software from Rocsience, incorporating Rock Mass Rating parameters derived from geotechnical drill hole logs and mapping data, which were integrated into a 3D block model using Minesight™. The analysis focused on two groundwater conditions: Water Surface and Pore Pressure Grid. Groundwater model conditions were based on piezometer data and a new groundwater conceptual model of the Batu Hijau pit walls. Results from sensitivity assessments shows that high pore pressure will decease the slope stability. This findings highlight the need to manage groundwater pressures within the pit walls to mitigate slope instability effectively,therefore, the safety of mining operational could be increased. This study provides valuable insights into groundwater pressure management and its implications for slope stability in large-scale open-pit mining operations.
Pengenalan dan Sosialisasi Potensi Hotspring Oi Pana di Hu’u, Kabupaten Dompu Sebagai Manifestasi Geologi Permukaan Putra, ZA Munarfan; Faesal, Andi; Ubaidillah, Aji Syailendra; Erintina, Melinda Dwi; Felisa, Maritsha Safa
Indonesia Berdampak: Jurnal Pengabdian kepada Masyarakat Vol. 2 No. 1 (2026): 2026
Publisher : Indo Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63822/p7y4f121

Abstract

Hu’u hot spring is a natural resource that emerges as a surface geological manifestation related to subsurface geothermal activity and has scientific and educational value for the local community. However, local community understanding of the geological processes, characteristics, and potential utilization of the hot spring remains limited, resulting in underutilization that is not yet knowledge-based or sustainable. This community service program aimed to introduce the potential of the Hu’u hot spring as a surface geological manifestation and to improve community awareness and understanding of its geological significance. The program was conducted using an educative and participatory approach, consisting of preparation, socialization and education, limited field observation, and qualitative evaluation. Educational activities were delivered through counseling sessions, interactive discussions, and simple visual media to explain basic geological concepts related to hot spring formation, while field observations were conducted directly at the hot spring site to identify observable surface manifestations. The results showed a measurable improvement in community understanding, indicated by increased participant ability to explain the origin of the hot spring, recognize key surface geological features, and articulate the importance of environmental preservation around the site. Participant engagement during discussions increased significantly, with more than two-thirds of attendees actively participating in question-and-answer sessions. The program also resulted in increased community awareness regarding the sustainable use of the hot spring as a local natural resource. Overall, this community service activity successfully enhanced geoscience literacy and provided a foundation for future community-based and sustainable utilization of the Hu’u hot spring.        
The Karakteristik Mineralisasi dan Alterasi Transisi Porfiri-Epitermal pada Sistem Porfiri-Epitermal Prospek Onto, Dompu, Sumbawa, Indonesia: Karakteristik Mineralisasi dan Alterasi Transisi Porfiri-Epitermal pada Sistem Porfiri-Epitermal Prospek Onto, Dompu, Sumbawa, Indonesia Putra, Z A Munarfan; Hermansyah, Wahyu; Erintina, Melinda Dwi; Ubaidillah, Aji Syailendra; Syarbini, Khatib; Dermawan, Iwan; Farwati, Baiq Esti Mila; Faesal, Andi; Irawan, Baiq Brilliant Vani
Jurnal Ilmiah Giga Vol. 28 No. 2 (2025): Volume 28 Edisi 2 Tahun 2025
Publisher : Universitas Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47313/jig.v28i2.4293

Abstract

Penelitian ini mengkaji Prospek Onto pada Busur Sunda bagian timur, koridor prospektif pada sistem magmatisme Sunda–Banda yang kaya endapan emas–tembaga tipe porfiri dan epitermal, dengan tujuan mengkarakterisasi alterasi hidrotermal dan mineralisasi bijih melalui metode kualitatif mencakup studi lapangan, logging inti bor dari lubang VHD039, VHD055, dan VHD086, serta analisis petrografi dan mikroskopi bijih; hasil penelitian menunjukkan bahwa intrusi porfiri Onto mengalami tumpang-tindih argilik lanjut akibat pengaruh fluida epitermal sulfidasi tinggi, dengan urutan alterasi vertikal dari bawah ke atas meliputi kuarsa–piropilit ±diaspor, kuarsa–alunit–piropilit, kuarsa vuggy residual, kuarsa–alunit, kuarsa–dikit, kuarsa–kaolinit, dan ilit–smektit, sedangkan analisis petrografi memperlihatkan dominasi mineral alterasi temperatur tinggi seperti kuarsa–alunit dan kuarsa–alunit–piropilit ±diaspor; mineralisasi tembaga–emas didominasi oleh kovelit–pirit yang berasosiasi dengan alterasi kuarsa–alunit pada kedalaman ±300 meter, dan mineralisasi sulfida melimpah (kovelit–pirit) berkembang pada urat kuarsa tipe A–B di sistem porfiri, di mana kovelit muncul sebagai diseminasi halus, pengisi urat, maupun inklusi dalam pirit, serta proses pelindian mineral primer seperti feldspar dan plagioklas membentuk rongga vuggy yang kemudian terisi oleh kovelit–pirit–belerang alami; kehadiran alterasi argilik lanjut intens dan mineralisasi sulfida utama berupa kovelit–pirit–sulfur mengindikasikan bahwa Prospek Onto merupakan sistem porfiri yang terawetkan dan tertumpang-tindih oleh sistem epitermal sulfidasi tinggi (lithocap), mencerminkan lingkungan mineralisasi transisi yang kompleks
Co-Authors Anggraeni, Juraedah Dwi Azhari, Uraihan Dermawan, Iwan Faesal, Andi Farwati, Baiq Esti Mila Felisa, Maritsha Safa Hakim, Muhammad Samsul HENDRA GUNAWAN B11211055 Hermansyah, Wahyu Irawan, Baiq Brilliant Vani Melinda Dwi Erintina Sismanto Sismanto Syamsul Hidayat SYAMSUL HIDAYAT Syarbini, Khatib Ubaidillah, Aji Syailendra