Article Per Year (5 Year)
p-Index From 2021 - 2026
0.702
P-Index
This Author published in this journals
All Journal Jurnal Ilmiah Giga Journal of Geoscience, Engineering, Environment, and Technology
Dermawan, Iwan
Unknown Affiliation
Earth & Planetary Sciences Education Engineering Environmental Science Physics

Published : 4 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 4 Documents
Search

 1 
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.
ANALISIS PROFIL NIKEL LATERIT DENGAN MENGGUNAKAN DATA BOR PADA BLOK X DI PT MULIA PACIFIC RESOURCES Sadam, Muh; Erintina, Melinda Dwi; Ubaidillah, Aji Syailendra; Hidayat, Syamsul; Faesal, Andi; Syarbini, Khatib; Dermawan, Iwan; Anggara, Taufik Muja
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.v28i2.4221

Abstract

Penelitian ini bertujuan untuk menganalisis profil laterit di lokasi penelitian, mengidentifikasi komposisi mineral pada setiap lapisan, serta menentukan jenis batuan berdasarkan analisis petrografi. Endapan nikel laterit terbentuk sebagai hasil pelapukan residu batuan ultramafik melalui proses pelindian dan pemerkayaan supergen. Proses ini dipengaruhi oleh morfologi, struktur geologi, dan fluktuasi muka air tanah yang mengontrol distribusi unsur dalam profil laterit. Pendekatan penelitian kuantitatif diterapkan melalui observasi lapangan, pengambilan sampel, dan analisis bijih. Data bor pada Blok X ini belum pernah dipublikasikan sebelumnya. Hasil pengeboran menunjukkan variasi profil laterit pada setiap titik bor. Analisis mineralogi menunjukkan bahwa lapisan limonit didominasi oleh goethite, hematit, dan mangan, sementara lapisan saprolit mengandung serpentin, goethite, piroksen, olivin, dan silika. Lapisan batuan dasar didominasi oleh piroksen, serpentin, olivin, dan silika. Analisis petrografi mengonfirmasi bahwa sampel batuan dari MS-1 hingga MS-3 menunjukkan karakteristik peridotit dengan dominasi mineral piroksen, serpentin, olivin, dan kuarsa. Hasil penelitian ini memberikan wawasan mengenai karakteristik profil laterit serta distribusi mineral di daerah penelitian, yang dapat menjadi dasar eksplorasi lebih lanjut terkait potensi endapan nikel laterit.
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; Irawan, Baiq Brilliant Vani; Faesal, Andi
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 di busur Sunda bagian timur, koridor magmatis Sunda–Banda yang prospektif terhadap endapan emas–tembaga porfiri dan epitermal, dengan tujuan mengkarakterisasi alterasi hidrotermal dan mineralisasi bijih untuk memahami hubungan sistem porfiri dan epitermal sulfidasi tinggi. Metode kualitatif meliputi studi lapangan, logging inti bor VHD039, VHD055, dan VHD086, serta analisis petrografi dan mikroskopi bijih. Hasil menunjukkan intrusi porfiri Onto mengalami tumpang-tindih alterasi argilik lanjut akibat fluida epitermal sulfidasi tinggi, dengan zonasi vertikal dari bawah ke atas berupa kuarsa–piropilit ± diaspor, kuarsa–alunit–piropilit, kuarsa vuggy residual, kuarsa–alunit, kuarsa–dikit, kuarsa–kaolinit, hingga ilit–smektit, serta dominasi mineral alterasi temperatur tinggi seperti kuarsa–alunit dan kuarsa–alunit–piropilit ± diaspor. Mineralisasi tembaga–emas didominasi kovelit–pirit yang berasosiasi dengan alterasi kuarsa–alunit pada kedalaman ±300 m, berkembang sebagai diseminasi, pengisi urat kuarsa tipe A–B, dan inklusi dalam pirit, dengan tekstur vuggy terisi kovelit, pirit, dan sulfur alami; secara keseluruhan, alterasi argilik lanjut yang intens dan dominasi kovelit–pirit–sulfur mengindikasikan Prospek Onto sebagai sistem porfiri terawetkan yang tertumpang-tindih oleh sistem epitermal sulfidasi tinggi (lithocap), mencerminkan lingkungan mineralisasi transisi yang kompleks.
Co-Authors Anggara, Taufik Muja Anggraeni, Juraedah Dwi Azhari, Uraihan Faesal, Andi Farwati, Baiq Esti Mila Hakim, Muhammad Samsul HENDRA GUNAWAN B11211055 Hermansyah, Wahyu Irawan, Baiq Brilliant Vani Melinda Dwi Erintina Sadam, Muh Sismanto Sismanto SYAMSUL HIDAYAT Syamsul Hidayat Syarbini, Khatib Ubaidillah, Aji Syailendra ZA Munarfan Putra