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All Journal Jurnal Ilmiah Geomatika Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir
Pambudi, Setia
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Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Energy Engineering Materials Science & Nanotechnology

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Identifikasi Zona Mineralisasi Dan Struktur Pengontrol Skarn Cu Daerah Sulit Air, Kabupaten Solok, Provinsi Sumatera Barat Afrilita, Afrilita; Idrus, Arifudin; Pambudi, Setia; Pratomo, Septyo Uji
Jurnal Ilmiah Geomatika Vol. 2 No. 2 (2022): Oktober Jurnal Ilmiah Geomatika
Publisher : Program Studi Teknik Geomatika Fakultas Teknologi Mineral Universitas Pembangunan Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/imagi.v2i2.9421

Abstract

Endapan skarn merupakan salah satu dari beberapa endapanhidrotermal yang menghasilkan endapan bijih yang bernilai ekonomis. Mineralisasi skarn Cu pada daerah Sulit Air sudah diketahui sejak lama, namun belum banyak penelitian rinci yang membahas tentang kontrol struktur geologi terhadap penyebaran alterasi dan mineralisasi di daerah ini. Penelitian ini membahas tentang identifikasi zona mineralisasi dan kontrol struktur geologi terhadap pola penyebaran alterasi dan mineralisasi skarn Cu. Metodologi yang digunakan yaitu analisis citra DEM dan pemetaan geologi permukaan. Zona alterasi skarn Cu terbagi kedalam empat zonasi yaitu zona piroksen-K-feldspar-klorit-epidot, zona garnet-piroksen, zona piroksen-kuarsa, dan zona garnet-wollastonit-piroksen. Mineralisasi dominan hadir pada zona alterasi garnet-wollastonit-piroksen dan zona garnet-piroksen. Mineral utama pembawa Cu berupa bornit, kalkosit, malakit, azurit dan kalkopirit. Penyebaran alterasi mengikuti pola intrusi dan sesar-sesar mendatar lokal. Zona alterasi ini mengikuti sesar mendatar kiri yang berarah utara-selatan (N-S) sedangkan zona mineralisasi mengisi rekahan-rekahan pada zona sesar mendatar kiri yang berarah utara-selatan (N-S) dan barat laut-tenggara (NW-SE). Kekar pada zona sesar terisi oleh mineral-mineral kalsit, kuarsa dan azurit yang dominan berarah berarah barat laut-tenggara dan timur laut-barat daya.
Rare Earth Elements (REEs) Potential in Active Geothermal Systems: A Global Review and Regional Study at Mount Slamet, Indonesia Utama, Peter Pratistha; Pratomo, Septyo Uji; Haty, Intan Paramita; Yoni, Dian Rahma; Afrilita, Afrilita; Pambudi, Setia
EKSPLORIUM Vol. 46 No. 1 (2025): MAY 2025
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/eksplorium.2025.11407

Abstract

As global demand for REEs continues to rise due to their strategic role in clean energy technologies, geothermal systems offer an emerging unconventional source. Although data on Indonesian geothermal REEs remain limited, geochemical signals from Mount Slamet provide valuable insights when interpreted alongside global analogs. This study investigates the occurrence, mobility, and potential of rare earth elements (REEs) in the active geothermal system of Mount Slamet, Central Java, Indonesia, with a focus on the hot spring manifestations in Baturraden and Guci using a systematic literature review method based on published research. Baturraden exhibits neutral fluids (pH 6–7) with elevated chloride levels, suggesting enhanced REEs mobilization and strong positive europium (Eu) anomalies under deeper reducing conditions. In contrast, Guci displays more alkaline fluids (pH ~8) with lower chloride content, indicating possible meteoric water dilution and lower REEs transport efficiency. These contrasting hydrochemical profiles highlight diverse water-rock interaction mechanisms and fluid pathways. The findings highlight Mount Slamet as a promising candidate for REEs exploration in a volcanic-related geothermal system. This study underscores the urgent need for systematic research on REEs geochemistry in Indonesian geothermal fields to support mineral diversification and sustainable energy transitions.
Co-Authors Afrilita, Afrilita Arifudin Idrus Intan Paramita Haty Peter Pratistha Utama Pratomo, Septyo Uji Yoni, Dian Rahma