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All Journal Journal of Geoscience, Engineering, Environment, and Technology Journal of Applied Geology Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources)
Fatimah, Dian Yesy
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Chemistry Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Energy Engineering Environmental Science Physics

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Nickel as A Strategic Mineral and Its Potential Resources in X-Field, North Konawe, Southeast Sulawesi, Indonesia Fatimah, Dian Yesy; Her Krissanto, Juvens Yuda; Pamunga, M. Nur Alif; Nugroho, Rio P.
Journal of Applied Geology Vol 8, No 2 (2023)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jag.78116

Abstract

Indonesia is the world's largest producer of Nickel laterite deposits. By the regulation of UU No. 3 2020, due to its utility as the main component of batteries on electric vehicles (EV), nickel is one of the metal minerals that play important role in energy transition issues. It will drive the increasing demand for Nickel and Indonesia needs a massive exploration and specific regulation, especially for this deposit. The focus of this research is to discuss how important Ni is as a strategic mineral and its potential resources in North Konawe, Southeast Sulawesi. The methods are based on field data analysis and references study.X-Field is located in Lasolo Island, North Konawe, Southeast Sulawesi. This area has potential resources of Ni-laterite deposit. The lithological condition consists of a massive ultramafic igneous rock complex. The host rock has already been enriched by the serpentinization process. The geochemical analysis shows various ranges of 0.87-2.43% Ni content from different soil zone. To this day, the government regulation of Ni in a specific way as a critical mineral is still not present. The lack of data transparency (supply chain) and policy synchronization urgently need to be solved. 
Characteristics of Ore-Bearing Vein in Banyuresmi, Cigudeg District, West Java Province: Constraints from Geological, Alteration, and Mineralization Aspects Alamudi, Ali Rifqi `; Rizkyafdhal, Mochamad Risyad; Firdaus, Muhammad Bintang; Fatimah, Dian Yesy; Wahjoedi, Dimas Setya Kusuma
Jurnal Geologi dan Sumberdaya Mineral Vol. 26 No. 2 (2025): JURNAL GEOLOGI DAN SUMBERDAYA MINERAL
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v26i2.902

Abstract

The study area of the ore-bearing vein system is located in Banyuresmi, Cigudeg District, ±13.6 km from the Gunung Pongkor deposits or ±45 km from Jakarta. The ore-bearing veins system is being operated by smallscale and traditional gold mines. Up to now, no peerreviewed papers have been published on the geological conditions and ore characteristics in this area. This study aims to determine the distribution of lithology, geological structure, alteration zonation, and the mineralization characteristics of ore-bearing veins in the Banyuresmi area. To achieve the objectives, several research methods were employed, grouped into fieldwork (rock/vein sampling and geological structures measurement) and laboratory analysis (6 rock samples for petrography and 6 vein samples for ore microscopy). The results of this study indicate that the stratigraphy of the study area consists of porphyritic andesite units, which are overlain by lapilli tuff units and then followed by the formation of colluvial units. The geological structures that develop in the area of study, represented by normal faults, strike-slip faults, and thrust faults, are produced from the average value of maximum stress (σ1) for all tectonic phases, which have trend values of N32°E and N210°E (NE-SW). Hydrothermal alteration in the Banyuresmi vein system is divided into three zones: propylitic (chl-sm±ser±cb), argillic (il±kao), and silicification (qz). Mineralization in the area of study is dominated by ore minerals such as galena, sphalerite, pyrite, chalcopyrite, digenite, covellite, bornite, hematite, and pyrrhotite. These ore minerals are found in veins with quartz and quartz-clay composition, which consist of various textures including crustiform-colloform, massive, comb, zoning, dogteeth, cockade, etc. The veins are estimated to have varying orientations, including NW-SE, E-W, and NE-SW. Based on the characteristics of this study, the Banyuresmi ore vein system shows a propensity to be a low sulfidation epithermal system deposit type. Keywords: Ore-bearing vein, low sulfidation epithermal, hydrothermal alteration, Banyuresmi, West Java   Abstrak Sistem urat pembawa bijih ini terletak ±13.6 km dari endapan Gunung Pongkor atau ±45 km dari Jakarta. Sistem urat pembawa bijih ini dioperasikan oleh tambang emas skala kecil dan tradisional. Hingga saat ini, belum ada publikasi makalah yang memuat kondisi geologi terkait karakteristik urat pembawa bijih di daerah tersebut. Studi ini bertujuan untuk mengetahui persebaran litologi, struktur geologi, dan zonasi alterasi, serta menentukan karakteristik mineralisasi dari urat pembawa bijih di daerah Banyuresmi. Untuk mencapai tujuan tersebut, digunakan beberapa metode penelitian yaitu pekerjaan lapangan (pengambilan sampel, dan pengukuran kedudukan struktur geologi) dan analisis laboratorium (analisis petrografi pada 6 sampel batuan serta analisis mineragrafi pada 6 sampel urat). Hasil dari penelitian ini menunjukkan bahwa stratigrafi daerah penelitian terdiri dari Satuan Andesit Porfiritik yang ditindih oleh Satuan Lapili Tuf dan kemudian disusul oleh terbentuknya Satuan Koluvial. Struktur geologi yang berkembang pada daerah penelitian berupa sesar normal, sesar geser, dan sesar naik dihasilkan dari harga rata-rata tegasan maksimum (σ1) seluruh fase tektonik yang memiliki nilai tren N32°E dan N210°E (NE-SW). Alterasi hidrotermal pada sistem urat Banyuresmi terbagi kedalam tiga zona yaitu propilitik (chl-sm±ser±cb), argilik (il±kao), dan silisifikasi (qz). Mineralisasi daerah penelitian didominasi oleh mineral bijih seperti galena, sfalerit, pirit, kalkopirit, digenit, kovelit, bornit hematit, dan pirhotit. Mineral bijih tersebut dijumpai pada urat kuarsa dan kuarsa-lempung yang terdiri dari berbagai macam tekstur mencakup crustiform-colloform, masif, comb, zoning, dogteeth, cockade, dll. Urat-urat tersebut diperkirakan memiliki orientasi yang bervariasi, yaitu NW-SE, E-W, dan NE-SW. Berdasarkan karakteristik pada penelitian ini, sistem urat bijih Banyuresmi menunjukkan adanya kecenderungan sebagai tipe endapan sistem epitermal sulfidasi rendah. Kata Kunci: Urat pembawa bijih, epitermal sulfidasi rendah, alterasi hidrotermal, Banyuresmi, Jawa Barat
Geochemical Properties and Critical Mineral Potential of Ni-Laterite Deposits in Advancing Clean Energy Technology Development Fatimah, Dian Yesy; Setiawan, Erwin; Prasojo, Adhen Salahudin Al Ayubi; Ulvah, Febria; Kurniawan, Rizki
Journal of Geoscience, Engineering, Environment, and Technology Special Issue from The 2nd International Conference on Upstream Energy Technology and Digitalization
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2025.10.1.1.24150

Abstract

Critical elements refer to a group of elements that possess strategic significance and play a vital role in the national economy, as well as in national defense and security. These minerals are at risk of supply disruptions and lack suitable substitutes. In clean energy industries, critical elements are particularly important, especially for electric vehicle components. Aligned with national commitments expressed in the G20 Leaders’ Declaration. Nickel laterite deposits are one of the key sources with high potential for critical elements. This research focuses on critical elements in nickel deposits, which are Ni, Co, Mn, Cr and Al, and their resource potential in Kolaka, Southeast Sulawesi. The methods used are geochemical data, field data, and reference studies. The methods used in the research include literature study, X-Ray Fluorescence (XRF) geochemical analysis of all samples using the Exploratory Data Analysis (EDA) method using Microsoft Excel, Data modelling using scatter plot and heatmap of spearman correlation. The findings indicate that the enrichment of critical elements such as cobalt (Co), manganese (Mn), aluminum (Al), and chromium (Cr) is concentrated in the limonite zone and associated with Fe with various ranges of 0.04-0.14% Co, 0.27-1.13% MnO, 1.03-4.60%Cr2O3, 2.82-9.94% Al2O3 content, whereas nickel (Ni) is enriched in the saprolite zone and associated with Mg with a various range 0.5-3.17%Ni. Overall, the concentration of critical elements other than Ni and Co is typically lower in nickel laterite deposits with high nickel content. With continuous advancements in extraction technologies through research, all zones of laterization in nickel laterite deposits, not just the nickel-rich saprolite zone, could be optimally utilized. This would enhance the potential of nickel laterite deposits as a valuable commodity, contributing significantly to the acceleration of the energy transition towards cleaner energy through clean energy-based technologies.
Co-Authors Alamudi, Ali Rifqi ` Erwin Setiawan, Erwin Firdaus, Muhammad Bintang Her Krissanto, Juvens Yuda Nugroho, Rio P. Pamunga, M. Nur Alif Prasojo, Adhen Salahudin Al Ayubi Rizki Kurniawan, Rizki Rizkyafdhal, Mochamad Risyad Ulvah, Febria Wahjoedi, Dimas Setya Kusuma