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All Journal Jurnal Ilmiah MTG Buletin Sumber Daya Geologi Jurnal Pengabdian Masyarakat AbdiMas Jurnal Lingkungan Almuslim Karya Nyata: Jurnal Pengabdian Kepada Masyarakat
Asri Arifin
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Agriculture, Biological Sciences & Forestry Humanities Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Law, Crime, Criminology & Criminal Justice

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GEOLOGI DAN KARAKTERISTIK BIJIH PIT RAMBA JORING DEPOSIT MARTABE, SUMATERA UTARA Arifin, Asri; Rosana, Mega Fatimah; Yuningsih, Euis Tintin; Yoseph, Boy
Buletin Sumber Daya Geologi Vol 14, No 2 (2019): Buletin Sumber Daya Geologi
Publisher : Buletin Sumber Daya Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1743.098 KB)

Abstract

Deposit Ramba Joring merupakan bagian dari wilayah Kontrak Karya (KK) pertambangan umum PT Agincourt Resources yang terletak di Kelurahan Aek Pining, Kecamatan Batangtoru, Kabupaten Tapanuli Selatan, Provinsi Sumatera Utara. Penelitian ini bertujuan untuk mengetahui kondisi geologi meliputi geomorfologi, stratigrafi dan struktur geologi serta karakteristik bijih yang mengandung emas-perak pada deposit Ramba Joring. Penelitian dilakukan pada 44 lubang bor dan 15 conto permukaan. Penelitian menggunakan metode analisis petrografi sayatan tipis dan poles, Analytical Spectral Devices (ASD), Scanning Electron Microscopy with Energy Dispersive (SEM EDS) serta pengolahan statistik data geokimia assay berupa nilai kadar kandungan Au, Ag, Cu, SxS (sulfide sulphur) yang didapatkan melalui analisis Atomic Absoption Spectrometry (AAS). Daerah penelitian tersusun oleh litologi, diurutkan dari tua ke muda, berupa satuan andesit hornblende dan breksi polimik-monomik. Satuan batuan andesit hornblende dan breksi polimik-monomik teralterasi kuat oleh empat jenis alterasi yaitu, silisifikasi (kuarsa-kalsedon-alunit-kaolinit±dikit), argilik lanjut (alunit±kuarsa-kaolinit±dikit-pirofilit), argilik (ilit±smektit-alunit-kaolinit-kuarsa) dan propilitik (klorit-epidot-kalsit). Terdapat enam jenis mineral sulfida pada daerah penelitian, paragenesa dimulai dari pirit, enargit, tennantit, tetrahedrit dan kovelit bersamaan dengan pengendapan emas-perak serta pirit dengan kristal berbentuk sempurna yang terbentuk paling akhir. Hasil uji pada data assay geokimia menunjukkan adanya korelasi antara kandungan unsur Au, Ag, Cu dan SxS (sulfide sulphur) terhadap jenis alterasi. Diketahui bahwa mineralisasi emas dan logam lainnya berasosiasiasi dengan mineral sulfida yang melimpah pada alterasi silisifikasi namun semakin berkurang pada jenis alterasi argilik hingga menghilang pada alterasi propilitik.
GEOLOGI DAN KARAKTERISTIK BIJIH PIT RAMBA JORING DEPOSIT MARTABE, SUMATERA UTARA Arifin, Asri; Rosana, Mega Fatimah; Yuningsih, Euis Tintin; Yoseph, Boy
Buletin Sumber Daya Geologi Vol. 14 No. 2 (2019): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1743.098 KB) | DOI: 10.47599/bsdg.v14i2.247

Abstract

Deposit Ramba Joring merupakan bagian dari wilayah Kontrak Karya (KK) pertambangan umum PT Agincourt Resources yang terletak di Kelurahan Aek Pining, Kecamatan Batangtoru, Kabupaten Tapanuli Selatan, Provinsi Sumatera Utara. Penelitian ini bertujuan untuk mengetahui kondisi geologi meliputi geomorfologi, stratigrafi dan struktur geologi serta karakteristik bijih yang mengandung emas-perak pada deposit Ramba Joring. Penelitian dilakukan pada 44 lubang bor dan 15 conto permukaan. Penelitian menggunakan metode analisis petrografi sayatan tipis dan poles, Analytical Spectral Devices (ASD), Scanning Electron Microscopy with Energy Dispersive (SEM EDS) serta pengolahan statistik data geokimia assay berupa nilai kadar kandungan Au, Ag, Cu, SxS (sulfide sulphur) yang didapatkan melalui analisis Atomic Absoption Spectrometry (AAS). Daerah penelitian tersusun oleh litologi, diurutkan dari tua ke muda, berupa satuan andesit hornblende dan breksi polimik-monomik. Satuan batuan andesit hornblende dan breksi polimik-monomik teralterasi kuat oleh empat jenis alterasi yaitu, silisifikasi (kuarsa-kalsedon-alunit-kaolinit±dikit), argilik lanjut (alunit±kuarsa-kaolinit±dikit-pirofilit), argilik (ilit±smektit-alunit-kaolinit-kuarsa) dan propilitik (klorit-epidot-kalsit). Terdapat enam jenis mineral sulfida pada daerah penelitian, paragenesa dimulai dari pirit, enargit, tennantit, tetrahedrit dan kovelit bersamaan dengan pengendapan emas-perak serta pirit dengan kristal berbentuk sempurna yang terbentuk paling akhir. Hasil uji pada data assay geokimia menunjukkan adanya korelasi antara kandungan unsur Au, Ag, Cu dan SxS (sulfide sulphur) terhadap jenis alterasi. Diketahui bahwa mineralisasi emas dan logam lainnya berasosiasiasi dengan mineral sulfida yang melimpah pada alterasi silisifikasi namun semakin berkurang pada jenis alterasi argilik hingga menghilang pada alterasi propilitik.
KARAKTERISTIK FLUIDA PEMBAWA MINERALISASI PIT RAMBA JORING DEPOSIT MARTABE, SUMATRA UTARA: MINERALIZATION BEARING FLUID CHARACTERISTIC OF RAMBA JORING PIT MARTABE DEPOSIT, NORTH SUMATRA Arifin, Asri; Rosana, Mega Fatimah; Yuningsih, Euis Tintin; Yoseph CSSSA, Boy
Buletin Sumber Daya Geologi Vol. 16 No. 2 (2021): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47599/bsdg.v16i2.314

Abstract

The research aims to determine hydrothermal evolution of the mineralisation bearing fluid contained in the Ramba Joring Pit, including temperature, pressure, density and depth of mineralisation deposition formation. This research uses the fluid inclusion analysis. Inclusion sampling was carried out on two main textures of ore namely vuggy silica texture formed at range Th 331ºC to 394ºC, Tm -15.19ºC to -12.94ºC with salinity of 14.42 wt% - 14.89 wt%. NaCl equivalent and brecciated texture formed at range Th 287.8ºC – 398.2ºC, Tm -14.89ºC to -11,76ºC and salinity 13.91 wt% – 14.87 wt%. NaCl equivalent. The positive correlation between the homogenization temperature of mineralization formation and salinity of the solution indicates that the leaching process that forms cavities in rocks occurs at the initial stage of the hydrothermal alteration process that begins with the leaching process forming cavities (silica vuggy) followed by the process of silicification with brecciated texture, the deposition of mineralization takes place at this stage. The origin of the solution forms a hydrothermal deposition is a type of basinal water-seawater solution in the form of connate water which is still influenced by surface water/meteoric water, also shows an indication of a relationship with magmatic water. The density of metal-forming fluids ranges from 0.8 gr/cm3 – 0.9 gr/cm3 while the process that takes place in the formation of ore in Ramba Joring Pit is isothermal mixing with a slight warming effect/boiling.
TIPE ENDAPAN EPITERMAL DAERAH PROSPEK BAKAN KECAMATAN LOLAYAN KABUPATEN BOLAANG MONGONDOW PROPINSI SULAWESI UTARA Asri Arifin
Jurnal Ilmiah MTG Vol 6, No 1 (2013)
Publisher : Jurusan Teknik Geologi Fakultas Teknologi Mineral UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (9.277 KB)

Abstract

Daerah penelitian terletak di Daerah Prospek Bakan, Kecamatan Lolayan Kabupaten Bolaang Mongondow Propinsi Sulawesi Utara. Daerah Penelitian didominasi oleh batuan yang telah mengalami alterasi/ubahan hidrotermal kuat.Alterasi hidrotermal yang berkembang di daerah penelitian ditandai dengan kehadiran kelompok mineral ubahan seperti kuarsa, alunit, kaolinit, dickit, smectit, illit, klorit, epidot, kalsit, serisit, halloysit, pyrophillit dan lempung membentuk tipe alterasi silisifikasi, advance argilik, intemedit argilik temperatur tinggi, intermedit argilik temperatur rendah dan alterasi propilitik.Mineralisasi bijih seperti pirit, kalkopirit, sphalerit, galena, arsenopirit dan kehadiran mineral oksida seperti hematit, magnetit dan limonit, yang disertai oleh pola dan tekstur mineralisasi berupa breksiasi, vuggy, silika masif, banded dan urat halus serta tekstur pengisian, colloform dan disseminated yang dominan mendukung bahwa lingkungan sistem mineralisasi daerah penelitian adalah tipe endapan epitermal sistem sulfidasi tinggi.
PENENTUAN JENIS LONGSORAN DI POROS JALAN INDUHA LATAMBAGA KOLAKA SULAWESI TENGGARA Muhammad Chaerul; Riza Rasmita; Erwin Anshari; Asri Arifin
Jurnal Lingkungan Almuslim Vol 2 No 2 (2023): Jurnal Lingkungan Almuslim
Publisher : Program Studi Magister Pengelolaan Sumberdaya Alam dan Lingkungan Universitas Almuslim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51179/jla.v2i2.2169

Abstract

The research location is located in Induha Village, Latambaga District, Kolaka Regency, Southeast Sulawesi Province. This study aims to determine the factors controlling landslides, and the types of landslides in the study area. The method used in this research is direct observation in the form of data collection and data collection that is found directly in the field including geological observations, taking rock samples, measuring slopes, and taking documentation of 3 points of landslides. Factors that control the occurrence of landslides in the study area are influenced by controlling factors, namely very steep slopes with a slope of around ± 62o – 67o. Lithological conditions are metamorphic rocks that have undergone changes due to pressure and temperature.
Edukasi Pertambangan Berwawasan Lingkungan pada Mahasiswa Teknik Geologi Universitas Sulawesi Tenggara Saleh, Isman; Arisona Arisona; Okto, Ali; Arifin, Asri; Bahdad Bahdad; Masri Masri; Jaya, Rio Irhan Mais Cendra; Firdaus, Amritzal Nur
Karya Nyata : Jurnal Pengabdian kepada Masyarakat Vol. 2 No. 3 (2025): September : Karya Nyata : Jurnal Pengabdian kepada Masyarakat
Publisher : Lembaga Pengembangan Kinerja Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62951/karyanyata.v2i3.2244

Abstract

This community service program aims to enhance the understanding of Geology Engineering students at Universitas Sulawesi Tenggara regarding environmentally sustainable mining practices. The education was delivered through lectures, interactive discussions, and local case studies relevant to mining activities in Southeast Sulawesi. These methods were chosen to encourage active participation and ensure the materials were contextually relevant to the students’ local environment and future professional field. The results indicate that students gained new insights into the implementation of good mining practice, post-mining reclamation, and mining and environmental regulations, which fostered greater awareness of the environmental and social impacts of mining. In addition, the program facilitated critical thinking and encouraged students to analyze real-world mining problems from a sustainability perspective. Consequently, this program not only improved students’ environmental literacy but also developed a sense of responsibility and commitment to supporting sustainable mining practices. It is expected that the knowledge gained will influence their future decisions as professionals in the mining sector, promoting a more sustainable and responsible industry.
PENENTUAN JENIS LONGSORAN DI POROS JALAN INDUHA LATAMBAGA KOLAKA SULAWESI TENGGARA Chaerul, Muhammad; Rasmita, Riza; Anshari, Erwin; Arifin, Asri
Jurnal Lingkungan Almuslim Vol 2 No 2 (2023): Jurnal Lingkungan Almuslim
Publisher : Program Studi Magister Pengelolaan Sumberdaya Alam dan Lingkungan Universitas Almuslim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51179/jla.v2i2.2169

Abstract

The research location is located in Induha Village, Latambaga District, Kolaka Regency, Southeast Sulawesi Province. This study aims to determine the factors controlling landslides, and the types of landslides in the study area. The method used in this research is direct observation in the form of data collection and data collection that is found directly in the field including geological observations, taking rock samples, measuring slopes, and taking documentation of 3 points of landslides. Factors that control the occurrence of landslides in the study area are influenced by controlling factors, namely very steep slopes with a slope of around ± 62o – 67o. Lithological conditions are metamorphic rocks that have undergone changes due to pressure and temperature.
Edukasi Pertambangan Berwawasan Lingkungan pada Mahasiswa Teknik Geologi Universitas Sulawesi Tenggara Saleh, Isman; Okto, Ali; Arifin, Asri; Bahdad, Bahdad; Jaya, Rio Irhan Mais Cendra; Firdaus, Amritzal Nur
Jurnal Pengabdian Masyarakat AbdiMas Vol 12, No 1 (2025): Jurnal Pengabdian Masyarakat Abdimas
Publisher : Universitas Esa Unggul

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47007/abd.v12i1.10174

Abstract

Kegiatan pengabdian kepada masyarakat ini bertujuan untuk meningkatkan pemahaman mahasiswa Teknik Geologi Universitas Sulawesi Tenggara mengenai pertambangan berwawasan lingkungan. Edukasi diberikan melalui penyuluhan, diskusi interaktif, dan studi kasus lokal yang relevan dengan kondisi pertambangan di Sulawesi Tenggara. Hasil kegiatan menunjukkan bahwa mahasiswa memperoleh wawasan baru terkait penerapan good mining practice, reklamasi pascatambang, serta regulasi pertambangan dan lingkungan, sehingga kesadaran kritis mereka terhadap dampak lingkungan dan sosial dari pertambangan semakin meningkat. Dengan demikian, kegiatan ini tidak hanya menambah literasi lingkungan mahasiswa, tetapi juga membentuk sikap peduli dan tanggung jawab dalam mendukung praktik pertambangan yang berkelanjutan.
Co-Authors Amritzal Nur Firdaus Anshari, Erwin Arisona Arisona Bahdad Bahdad Bahdad, Bahdad Boy Yoseph Cahya Sunan Sakti Syah Alam Erwin Anshari Euis Tintin Yuningsih Isman Saleh Jaya, Rio Irhan Mais Cendra Masri Masri Mega Fatimah Rosana Muhammad Chaerul Okto, Ali Rasmita, Riza Riza Rasmita