http://buletinsdg.geologi.esdm.go.id/index.php/bsdg <p>Buletin Sumber Daya Geologi is a scientific journal focusing on studies and research in the field of geological resources, particularly minerals, fossil energy, and geothermal energy. The journal aims to serve as a platform for publishing current and relevant research to support the advancement of science and technology in the geology sector.</p> <p>This journal is published three times a year, in May, August, and November, with a print ISSN of 1907-5367 and an electronic ISSN of 2580-1023. Buletin Sumber Daya Geologi has been accredited by the Ministry of Research, Technology, and Higher Education (Kemenristekdikti). In 2020, the journal achieved a Level 2 ranking as a Nationally Accredited Scientific Journal, valid for five years.</p> <p>Each article published in this journal is assigned a DOI with the prefix 10.47599, ensuring integrity and ease of citation. Through a rigorous peer-review process, Buletin Sumber Daya Geologi delivers high-quality articles that serve as valuable references for academics, practitioners, and policymakers in the field of geology.</p> <p>The journal invites authors to contribute research articles, particularly those relevant to the themes of minerals, fossil energy, and geothermal energy.</p> Pusat Sumber Daya Mineral Batubara dan Panas Bumi en-US Buletin Sumber Daya Geologi 1907-5367 <p class="" data-start="52" data-end="125"><strong data-start="52" data-end="125">Authors whose manuscripts are published agree to the following terms:</strong></p> <p class="" data-start="127" data-end="357">The publication rights of all journal manuscript materials published on the <em data-start="203" data-end="232">Buletin Sumber Daya Geologi</em> website are held by the editorial board with the knowledge of the author (moral rights remain with the manuscript’s author).</p> <p class="" data-start="359" data-end="811">The formal legal provisions for access to digital articles in this electronic journal are subject to the terms of the <strong data-start="477" data-end="531">Creative Commons Attribution-ShareAlike (CC BY-SA)</strong> license. This means that <em data-start="557" data-end="586">Buletin Sumber Daya Geologi</em> has the right to store, convert media/formats, manage in the form of a database, maintain, and publish the article without requesting permission from the author, as long as the author’s name is cited as the copyright holder.</p> <p class="" data-start="813" data-end="1054">Manuscripts published in both print and electronic formats are <strong data-start="876" data-end="891">open access</strong> for educational, research, investigative, and library purposes. Beyond these purposes, the editorial board is not responsible for any violations of copyright law.</p> http://buletinsdg.geologi.esdm.go.id/index.php/bsdg/article/view/BSDG_VOL_20_NO_1_2025_1 <p><em>The research area is located within the Mining Bussines Licence-Operation Production (IUP-OP) of PT Bumi Suksesindo in the Tumpangpitu area, Pesanggaran District, Banyuwangi Regency, East Java. The research area covers two areas, namely Pit A and Pit C. In Tumpangpitu, there are two types of ore deposits: porphyry copper and high-sulfidation epithermal gold. The aim of this research is to determine the types of lithology, alteration, mineralization, and ore deposit types in the research area. The research methods used include detailed core logging, analytical spectral devices (ASD) measurement, corescan, and mineragraphy analysis. The research was conducted using data from 10 drill holes: GTD-719, GTD-727, GTD-728, GTD-735, GTD-778, GTD-781, GTD-782, GTD-785, GTD-786, and GTD-792. The correlation results of the drill holes in the research area indicate that the lithology consists of andesite volcanic, preatomagmatic phase 1 breccia, dacite volcanic, diorite, preatomagmatic phase 2 breccia, and dacite intrusion dome. Based on the set of alteration minerals, pH, and temperature, there are 7 alteration zones: silica, silica ± alunite, pyrophyllite ± diaspore ± alunite, alunite ± pyrophyllite ± dickite ± kaolinite, alunite ± kaolin, kaolinite ± dickite ± montmorillonite-illite, chlorite ± montmorillonite-illite. The mineralization found includes pyrite (FeS</em><em>₂</em><em>), enargite (Cu</em><em>₃</em><em>AsS</em><em>₄</em><em>), and sphalerite ((ZnFe)S). The type of deposit in the research area is high-sulfidation epithermal deposit with a depth of 500-1</em><em>,</em><em>000 meters (intermediate).</em></p> Maftukha Alfiani Dadan Wildan Benny Bensalman M. Hafid Rahadi Trisna Suntara Lia Novalia Agung Copyright (c) 2025 Buletin Sumber Daya Geologi https://creativecommons.org/licenses/by-nc-sa/4.0 2025-05-02 2025-05-02 20 1 1 15 10.47599/bsdg.v20i1.487