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All Journal IJOG : Indonesian Journal on Geoscience Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir Journal of Geoscience, Engineering, Environment, and Technology Jurnal GEOSAPTA Prosiding Temu Profesi Tahunan PERHAPI Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir
Arie Naftali Hawu Hede
Kelompok Keahlian Eksplorasi Sumberdaya Bumi, Fakultas Teknik Pertambangan Dan Perminyakan, Institut Teknologi Bandung, Jl. Ganesha No. 10, Bandung, 40132
Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Energy Engineering Environmental Science Materials Science & Nanotechnology Physics Social Sciences

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Hydrothermal Alteration and Geochemical Signatures of High-Sulfidation Epithermal Gold Mineralization in Petai Patah, West Kalimantan, Indonesia Hede, Arie Naftali Hawu; Azmi, Noprizan; Syafrizal
Journal of Geoscience, Engineering, Environment, and Technology Vol. 11 No. 02 (2026): JGEET Vol 11 No 02 : June (2026)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2026.11.02.24047

Abstract

High-sulfidation epithermal systems are an important source of precious metals in volcanic-arc settings, yet detailed studies of these systems in the Schwaner Mountains of western Borneo remain scarce. This study investigates the hydrothermal alteration and geochemical signatures of high-sulfidation epithermal gold mineralization in the Petai Patah area, Ketapang District, West Kalimantan, Indonesia, hosted within the Cretaceous Sukadana Granite and the Paleogene Kerabai Volcanic Complex. An integrated analytical approach was employed, combining reflectance spectroscopy, petrographic analysis, X-ray diffraction (XRD), and whole-rock geochemistry on 15 representative rock samples from surface outcrops and drill cores. Results reveal a well-defined hydrothermal alteration zonation, comprising an advanced argillic core (alunite, pyrophyllite, dickite) in Pit Lokma, surrounded by a phyllic zone (dominant muscovite/sericite–illite–pyrite assemblage) extending into Pit Limun. Gold mineralization (maximum 1.61 ppm Au in sample DC 347, Pit Limun) is spatially correlated with these alteration zones and occurs in association with sulfide minerals, suggesting a structurally controlled fluid pathway. Elevated As concentrations in gold-bearing samples from Pit Limun, together with the diagnostic mineralogical assemblage, support the interpretation of a high-sulfidation epithermal system. This study provides new insights into the spatial relationship between alteration zonation and gold enrichment within a high-sulfidation epithermal system, offering implications for mineral exploration in similar magmatic arc settings across Southeast Asia.
Co-Authors ., Syafrizal Al Hakim, Andy Yahya Amerthozi, Ahmad FauSatyogroho Dian Andika Satria Pradana Anggraini, Olga Padmasari Azmi, Noprizan Azward, Ichwan da Costa, J. C. Firdaus, Muhammad Anugrah Heri Syaeful Heri Syaeful Heriawan, Mohamad Nur Ichwan Azwardi Ichwan Azwardi Lubis Ichwan Azwardi Lubis Indriati, Teti Mohamad Nur Heriawan Muhammad Anugrah Firdaus Mutiara Indah Permatasari Nabilla, Amrita Oza Rivai, Tomy Alvin Rudy Fernando Sihite Satyogroho Dian Amertho Sihite, Rudy Fernando Steven, F. Suharjo, Enrico Gilrandy Wahyu syafrizal Syafrizal Syafrizal Syafrizal Syafrizal Syafrizal Syafrizal Syahwalid, K. Yogi La Ode Prianata