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All Journal Natural Science: Journal of Science and Technology JGE (Jurnal Geofisika Eksplorasi) Jurnal Fisika FLUX Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources) Jurnal Geomine Jurnal GEOSAPTA Jurnal Pengabdian Magister Pendidikan IPA Adimas : Jurnal Pengabdian Kepada Masyarakat Jambura Geoscience Review To Maega: Jurnal Pengabdian Masyarakat Bubungan Tinggi: Jurnal Pengabdian Masyarakat Lamahu: Jurnal Pengabdian Masyarakat Terintegrasi INFOTIKA: Jurnal Pendidikan Informatika Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources) Tadulako Science and Technology Journal Media Konstruksi : Jurnal Ilmiah Teknik Sipil Jurnal Geosaintek Jurnal Riset dan Pengabdian Interdisipliner Bomba: Jurnal Pembangunan Daerah
Asrafil Asrafil
Program Studi Teknik Geologi, Fakultas Teknik, Universitas Tadulako
Agriculture, Biological Sciences & Forestry Humanities Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Physics Public Health Social Sciences Transportation Veterinary Other

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Identification of Ore Mineral and Host Rocks in Balukang Area, Sojol District, Donggala Regency, Central Sulawesi Province Kacong, Nurhijah Awaludin; Asrafil, Asrafil; Puspita, Riska
Jambura Geoscience Review Vol 8, No 1 (2026): Jambura Geoscience Review (JGEOSREV)
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jgeosrev.v8i1.34381

Abstract

The Balukang area, Sojol District (Donggala Regency, Central Sulawesi), is characterized by dioritic intrusions and active artisanal mine workings that expose mineralized rocks. This study aims to identify the presence of ore minerals, determine their host rocks, and understand the relationship between geological conditions and ore mineral formation in the area. Sampling was carried out at several observation stations identified in the field. Limited exposure restricted the sampling process, so some samples were taken from man-made mining pits that were still accessible. From all the samples collected, four representative samples were selected for petrographic analysis and six representative samples for mineralographic analysis. Petrographic thin sections and polished sections were examined using transmitted- and reflected-light microscopy to characterize mineral assemblages and textures. The analysis results showed the presence of ore minerals such as silver, gold, pyrite, chalcopyrite, sphalerite, covellite, galena, and hematite, with observed textures including intergrowth, replacement, open space filling, and mutual boundary. These textural relationships indicate hydrothermal deposition and provide a basis for interpreting mineral paragenesis in the study area. The ore minerals are associated with quartz diorite and quartz porphyry diorite as host rocks, which are controlled by intrusion lithology and geological structures. Overall, the identified mineral assemblage and host-rock association offer an initial mineralogical baseline to guide exploration targeting along veins, fractures, and stockwork zones. This study is a preliminary study, so further research is needed through detailed geological mapping, geochemical analysis, and fluid inclusion studies.
Geochemical Characteristics of Basalt in the Northern Taopa Area, Parigi Moutong Regency, Central Sulawesi Magfira, Sri Wanda; Asrafil, Asrafil; Puspita, Riska
Jambura Geoscience Review Vol 8, No 1 (2026): Jambura Geoscience Review (JGEOSREV)
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jgeosrev.v8i1.34364

Abstract

This study analyzes the geochemical characteristics of basaltic rocks in the Northern Taopa (Taopa Utara) area, Parigi Moutong Regency, Central Sulawesi, to constrain magma affinity, magmatic series, and tectonomagmatic setting. Although Central Sulawesi records complex arc–oceanic interaction, the major-element geochemistry of basalts from Northern Taopa has remained poorly documented. Petrographic observations and X-ray fluorescence (XRF) major-oxide analyses were conducted on four representative samples (ST10, ST19, ST24, and ST36). Petrographic analysis shows that all samples have a hypocrystalline–porphyritic texture with plagioclase, clinopyroxene, olivine, and opaque minerals set in a microlitic groundmass. Major-oxide compositions are characterized by SiO2 48.85–50.65 wt% and total Fe2O3 12.89–13.11 wt%, consistent with mafic basalt. On the total alkali–silica diagram the samples plot in the basalt field and display low total alkalis (Na2O+K2O 1.11–2.11 wt%) and very low K2O (0.039–0.051 wt%), indicating a low-K subalkaline affinity. AFM relations show relative Fe enrichment and place the samples within the tholeiitic series. Tectonic discrimination using TiO2–P2O5–MnO (TiO2 0.98–1.06 wt%; P2O5 0.405–0.427 wt%; MnO 0.208–0.276 wt%) suggests an ocean-island tholeiite (OIT) signature. The low-K tholeiitic, OIT-like character implies an intraplate oceanic mantle source contribution to basalt generation and provides quantitative constraints for refining regional tectonic reconstructions of Central Sulawesi during emplacement of the Taopa volcanic unit.
Sosialisasi Mengenai Jalur Geotrek Tanjung Api Sebagai Salah Satu Situs Geowisata untuk Kelompok Sadar Wisata Desa Labuan Kabupaten Tojo Una-Una Nunik Rezkiarti Janat; Muslimin U. Botjing; Risqa P. Mu’min; Tati Fitriana; Asrafil Asrafil; Riska Puspita; Irianto Uno
Lamahu: Jurnal Pengabdian Masyarakat Terintegrasi Vol 5, No 1: February 2026
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/ljpmt.v5i1.34549

Abstract

The socialization program on the Tanjung Api Geotrek Route was carried out to enhance the understanding, awareness, and capacity of the Tourism Awareness Group (Pokdarwis) of Labuan Village in managing geotourism potential based on local geological heritage. The Tanjung Api area in Tojo Una-Una Regency, Central Sulawesi, is known for its natural fire phenomenon caused by the release of flammable natural gas, giving the site unique scientific, educational, and tourism value. Using a participatory approach, the program included material presentations, interactive discussions, the introduction of geotrek route design, and field observations at several potential geosites. The results show that participants’ knowledge increased by 80–90% regarding geotourism concepts, geological resource conservation, and strategies for developing interpretive educational geotreks. Participants also demonstrated strong enthusiasm to engage in destination management and benefit from the economic opportunities offered by tourism activities. This program serves as an initial step in strengthening collaboration between the community, academia, and local government to support sustainable geotourism development. The socialization provides a foundation for achieving independent, well-directed, community-based management of the Tanjung Api geosite as part of broader geotourism development in Tojo Una-Una Regency.
MIKROZONASI SEISMIK KOTA PALU MENGGUNAKAN INDEKS NAKAMURA DAN ESTIMASI PGA BERBASIS MIKROTREMOR Icha Meidji; Nia Ramadanti; Asrafil Asrafil; Harsano Jayadi
Jurnal Geosaintek Vol. 12 No. 2 (2026)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25023659.v12i2.9105

Abstract

Penelitian ini menyusun peta mikrozonasi kerentanan akibat gempa di Kecamatan Mantikulore, Kota Palu, menggunakan 83 titik data mikrotremor. Nilai frekuensi dominan (f₀) dan faktor penguatan (A₀) ditentukan dari hasil analisis HVSR, kemudian Indeks Kerentanan Seismik dihitung menggunakan metode Nakamura. Percepatan getaran tanah maksimum (PGA) ditentukan secara empiris melalui persamaan Kanai dengan menghitung parameter magnitudo, kedalaman (hiposenter), dan jarak dari sumber gempa, serta periode predominan tanah (T0 = 1/f0). Pemetaan spasial parameter dilakukan menggunakan interpolasi IDW, dan peta mikrozonasi Kg diklasifikasikan mengacu pada Refrizon, sedangkan peta mikrozonasi PGA mengacu pada klasifikasi BMKG. Hasil menunjukkan Kg berkisar 1,338–57,204 dan PGA berkisar 74,84–414,38 gal. Peta mikrozonasi Kg membagi wilayah menjadi dua zona (sedang dan tinggi), sementara peta mikrozonasi PGA menunjukkan dua tingkat potensi kerusakan (ringan dan sedang), dengan kecenderungan nilai PGA lebih tinggi pada bagian timur yang berasosiasi dengan perbukitan, sedangkan bagian barat yang mengarah ke pesisir didominasi PGA lebih rendah. Peta mikrozonasi ini dapat digunakan sebagai masukan mitigasi dan arahan pembangunan berbasis kondisi tapak di Kecamatan Mantikulore.
Co-Authors A. Nurul Novia Rahmaningrum Abdul Mukaddas Abdul Mukaddas Abdullah Abdullah Agung Nugraha Ahmad Imam Abdullah Arifudin Idrus Assidiqi, Muhammad Badaruddin Badaruddin bayu saputra Botjing, Muslimin U Djamal Adi Nugroho Uno Djoko Wintolo Djoko Wintolo, Djoko Eka Yuliastri Fitriana, Tati Halawa, George Cordias Mulyanto Harsano Jayadi I Gede Tunas I Ketut Nuarta Icha Meidji Irianto Uno Irianto Uno Jamil, Wisnu Prawiro Raharjo Kacong, Nurhijah Awaludin Kurniawan, Mauludin Lestari, Sari Puji Listianti, Ajeng Magfira, Sri Wanda Moh Dahlan Th Musa Muslimin U. Botjing Nia Ramadanti Nunik Rezkiarti Janat Nunik Rezkiarti Janat Nurhikmah Supardi Parwati, Ni Made Suwitri Puspita, Riska R. Rusli Rahmawan, Ardi Ramdhani, Lisda Riska Puspita Risqa P. Mu’min Sandra Kasim, Sandra Sitti Rugayya Sitti Rugayya Sri Mulyati Sri Mulyati Sukardan Tawil Tati Fitriana Teguh Hilmansyah