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All Journal Jurnal Pertambangan Bulletin of Scientific Contribution : Geology Jurnal IPTEK Journal of Geoscience, Engineering, Environment, and Technology Jurnal Penelitian Sains PROMINE Jurnal Mineral, Energi dan Lingkungan Jambura Geoscience Review Jurnal Mineral, Energi dan Lingkungan Jurnal Geosains dan Remote Sensing (JGRS) Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Journal of Earth and Marine Technology (JEMT) Teknika Sains : Jurnal Ilmu Teknik Jurnal Penelitian Inovatif Ophiolite : Jurnal Geologi Terapan Journal of Geoscience Engineering and Energy (JOGEE) JURNAL TEKNIK GEOLOGI : Jurnal Ilmu Pengetahuan dan Teknologi Innovative: Journal Of Social Science Research Journal of Geology Sriwijaya OPHIOLITE : Jurnal Geologi Terapan
Yogie Zulkurnia Rochmana
Teknik Geologi Universitas Sriwijaya
Agriculture, Biological Sciences & Forestry Humanities Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Public Health Social Sciences Transportation Other

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Analisis Fasies dan Lingkungan Pengendapan Formasi Halang, Studi Kasus: Daerah Jeruklegi, Kabupaten Cilacap, Jawa Tengah Alpino, Muhammad; Rochmana, Yogie Zulkurnia
TEKNIKA SAINS Vol 10, No 2 (2025): TEKNIKA SAINS
Publisher : Universitas Sang Bumi Ruwa Jurai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24967/teksis.v10i2.4440

Abstract

Daerah Jeruklegi pada Kabupaten Cilacap memiliki karakteristik sedimen yang cukup menarik salah satunya pada Formasi Halang. Namun kajian detail terkait fasies dan sedimentasi pada Formasi Halang ini masih terbatas. Tujuan dari penelitian ini untuk mengetahui karakteristik litofasies guna memahami lingkungan pengendapan pada daerah Jeruklegi. Metode yang digunakan dalam penelitian ini yaitu pengukuran penampang stratigrafi. Pengukuran penampang stratigrafi dilakukan pada dua lintasan. Pada lintasan I terdapat 5 litofasies yaitu batupasir laminasi (Ssl), batupasir perlapisan (Ssb), batupasir wavy (Ssw), batulanau laminas (Sl), dan batulempung perlapisan (Cb) dengan asosiasi fasies medial fan lobe deposits. Pada lintasan II ditemukan lima litofasies yaitu batupasir perlapisan (Ssb), batupasir graded bedding (Ssg), batupasir laminasi (Ssl), batulanau laminasi (Ssl), dan batulempung perlapisan (Cb) dengan asosiasi fasies proximal fan channel & levee deposits dan medial fan lobe deposits. Hasil dari asosiasi fasies yang ditemukan pada Formasi Halang ini menunjukkan lingkungan pengendapan kipas bawah laut dengan model fasies lingkungan pengendapannya yaitu kipas bawah laut.
Stratigraphic Synthesis of the Danau Rayo Geosite: Possible Impact Fragmentation Wijaya, Anton; Setiawan, Budhi; Rochmana, Yogie Zulkurnia
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.v8i1.35667

Abstract

Lake Rayo in West Sulawesi, Indonesia, has been proposed as a potential meteorite impact structure, yet direct evidence supporting this origin remains limited. This study aims to provide a preliminary stratigraphic and granulometric characterization of Lake Rayo’s basin fill to clarify its genesis and support its geoheritage significance. Core sediment samples were collected from the basin floor and analyzed for grain size distribution, color (Munsell system), texture, and crack morphology using standard laboratory techniques. Seven stratigraphic intervals (BR1–BR7) were identified, showing clear vertical variations in granulometric parameters, sorting, and sediment color. Distinct fragmentation horizons, changes in color, and the occurrence of bedding cracks were interpreted as possible signatures of high-energy events, potentially associated with a meteorite impact. Comparative analysis with established impact structures, such as Lonar and Ries, revealed similar sedimentological features, supporting the impact hypothesis. These findings provide initial scientific evidence for the classification of Lake Rayo as an impact-related geoheritage site in Indonesia. The study also highlights the importance of integrating sedimentological data with future multidisciplinary research—such as geochemical and mineralogical shock analysis—to substantiate the impact origin more robustly. Overall, the results contribute valuable insights for geoheritage conservation, geoeducation, and the broader understanding of rare impact structures in Southeast Asia.
Rekonstruksi Sejarah Geologi Berdasarkan Analisis Stratigrafi Daerah Leuwidamar dan Sekitarnya, Kabupaten Lebak, Provinsi Banten Muhammad Hafidz Atthoriq; Yogie Zulkurnia Rochmana
OPHIOLITE: Jurnal Geologi Terapan Vol 6 No 2 (2024): OKTOBER 2024
Publisher : Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56099/ophi.v6i2.p42-52

Abstract

Daerah Leuwidamar memiliki lingkungan pengendapan yang beragam sehingga memerlukan pemahaman geologi lebih detail seperti pemahaman stratigrafi. Pemahaman stratigrafi masih belum terlalu komprehensif di daerah Leuwidamar. Penelitian ini bertujuan merekonstruksi sejarah geologi Leuwidamar dengan menentukan kronologi dan mekanisme pengendapannya. Metode penelitian yang dilakukan dengan observasi lapangan untuk mendapatkan data lapangan, analisis stratigrafi untuk mengetahui urutan pengendapan formasi batuan, dan analisis paleontologi untuk penentuan umur relatif formasi batuan. Sejarah geologi daerah Leuwidamar dikelompokkan menjadi empat fase geologi. Fase pertama pada kala Miosen Tengah - Miosen Akhir terjadi beda fasies pengendapan pada Formasi Bojongmanik (Tmbl) yang memiliki umur (N13) Sedangkan Formasi Bojongmanik (Tmbs) memiliki umur (N13-N16). Kemudian pada fase kedua meningkatnya aktivitas tektonik dan orogenik yang menyebabkan terbentuknya struktur geologi sehingga menyebabkan banyak zona lemah yang membuat Formasi Bojongmanik diintrusi oleh Formasi Andesit. Fase ketiga, pada kala Pliosen Awal terjadi aktivitas vulkanik sehingga terendapkan Formasi Genteng (Tpg). Fase keempat, terjadi jeda waktu hingga pada kala Pliosen Akhir aktivitas vulkanik meningkat sehingga terendapkan Formasi Cipacar (Tpc) dengan lingkungan (gunung api distal). Dengan memahami sejarah geologi dapat memberikan gambaran tentang evolusi proses proses geologi yang terjadi di daerah Leuwidamar.
Provenance dan Implikasi Tektonik Batupasir Formasi Sawahtambang, Kabupaten Sijunjung, Sumatra Barat Helen Dwi Putri; Budhi Setiawan; Yogie Zulkurnia Rochmana
OPHIOLITE: Jurnal Geologi Terapan Vol 6 No 2 (2024): OKTOBER 2024
Publisher : Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56099/ophi.v6i2.p72-79

Abstract

The Sawahtambang Formation in Sijunjung Regency, West Sumatra, is primarily composed of thick sandstones, which are of significant interest due to their potential as oil and gas reservoirs. However, the mineralogical and petrographic characteristics, as well as the depositional and tectonic origins of these sandstones, remain poorly understood, particularly in relation to the tectonic processes that influenced their formation. This knowledge gap poses challenges for accurate geological interpretation and resource assessment. The objective of this study is to investigate the mineral composition, petrographic properties, and provenance of the sandstones from the Sawahtambang Formation. The methodology employed includes petrographic analysis and provenance studies. The results of the provenance analysis indicate that the sandstones are derived from a Recycled Orogen source, suggesting that they were primarily formed in collision or subduction zones. This tectonic setting is characterized by a low feldspar and volcanic lithic content and a higher quartz content. The findings of this study contribute to a more comprehensive understanding of the geological information and origin of the Sawahtambang Formation sandstones in West Sumatra
Rekonstruksi Sejarah Geologi Berdasarkan Analisis Stratigrafi Daerah Pulau Beringin dan Sekitarnya, Kabupaten Lahat, Sumatera Selatan Muhammad Aghil Ikhwanulsyah; Yogie Zulkurnia Rochmana
OPHIOLITE: Jurnal Geologi Terapan Vol 7 No 2 (2025): AGUSTUS 2025
Publisher : Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56099/ophi.v7i2.p93-103

Abstract

This study was conducted in Pulau Beringin Village, Lahat Regency, South Sumatra, to reconstruct geological conditions and understand the chronology of sedimentation through stratigraphic analysis. The methods employed include field observations and laboratory-based stratigraphic interpretation. The stratigraphy of the study area, arranged from oldest to youngest, begins with the Saling Formation (KJs), dated to the Late Jurassic–Early Cretaceous, formed by the collision between the Woyla Arc and the West Sumatra Block, resulting in andesitic rocks deposited in a terrestrial setting. It is overlain by the Kikim Formation (Tpok), Paleocene–Oligocene in age, comprising andesitic breccia fragments within a braided fluvial environment. A transgressive phase deposited the Gumai Formation (Tmg) during the Early–Middle Miocene, characterized by carbonate-rich sandstone and shale in a delta front setting. Microfossil analysis confirms its relative age as Middle Miocene. The regressive phase led to the deposition of the Air Benakat Formation (Tma) during the Middle–Late Miocene in a lower delta plain environment, with sandstone and claystone lithologies. The Muara Enim Formation (Tmpm), dated to the Late Miocene–Pliocene, was deposited in an upper delta plain setting, consisting of tuffaceous sandstone and claystone. Finally, the Kasai Formation (Qtk), of Pliocene–Pleistocene age, was deposited in a fluvial environment and comprises conglomeratic sandstone and claystone. The overall depositional sequence was initially driven by tectonic activity, followed by transgressive and regressive cycles.
Mekanisme Struktur Geologi Berdasarkan Analisis DEM dan Analisis Stereografis Daerah Banjaranyar Sekitarnya Kabupaten Ciamis Jawa Barat Gultom, Felix Mateus Exaudi; Rochmana, Yogie Zulkurnia
JURNAL TEKNIK GEOLOGI : Jurnal Ilmu Pengetahuan dan Teknologi Vol 8, No 2 (2025): Jurnal Teknik Geologi : Ilmu Pengetahuan dan Teknologi
Publisher : Teknik Geologi Fakultas Teknik Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/jtgeo.v8i2.22972

Abstract

Daerah Banjaranyar memiliki kondisi geologi yang kompleks, yang ditandai oleh adanya aktivitas tektonik yang memengaruhi bentuk morfologi permukaan serta perkembangan struktur geologi di wilayah tersebut. Analisis mekanisme struktur menjadi penting untuk memahami hubungan antara proses tektonik dan formasi batuan yang terjadi. Tujuan dilakukan penelitian ini untuk mengidentifikasi dan menggambarkan jenis, arah gaya utama, dan arah pergerakan struktur yang ada pada daerah penelitian. Metode yang digunakan pada penelitian ini berupa pendekatan integratif melalui analisis citra satelit (DEM) dengan melihat dan analisis stereografis menggunakan software Dips dan Win Tensor. Analisis stereografis juga menggunakan beberapa klasifikasi untuk menghasilkan data yang akurat seperti Klasifikasi Fossen dan Klasifikasi Rickard untuk penamaan sesar serta Klasifikasi Fossen dan Klasifikasi Nabavi dan Fossen untuk penamaan lipatan. Berdasarkan hasil pengamatan dan pengolahan data, terdapat struktur orde 1 yaitu Sesar Pasawahan, Antiklin Banjaranyar, Sinklin Pasawahan dengan arah orientasi Barat – Timur, dan struktur orde 2 yaitu Sesar Cigayam dengan arah orientasi Barat Laut – Tenggara.
Unravelling the Sequence Stratigraphy Impact on Coal Geometry of M2 Member, Muara Enim Formation Hibatullah, Kevin Nabil; Setiawan, Budhi; Rochmana, Yogie Zulkurnia; Wicaksono, M Dwiki Satrio
Journal of Geoscience, Engineering, Environment, and Technology Vol. 11 No. 1 (2026): JGEET Vol 11 No 01 : March (2026)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2026.11.1.16191

Abstract

Sequence stratigraphy involves studying a series of rock layers deposited during a full change cycle in accommodation or sediment supply, bounded by subaerial unconformities and marine correlative conformities. This study aims to identify the stratigraphic sequence that controls the coal accumulation models and their influence on the coal geometry. The research methodology includes geological mapping, analysis of geophysical logs (gamma-ray and short density), and core log analysis. The data were analyzed, combined, interpreted, and simulated to create a model of coal accumulation and geometry. The M2 Member of the Muara Enim Formation comprises six lithofacies, as determined by analyzing four drill holes. The M2 Member of the Muara Enim Formation exhibits four depositional environments (crevasse splay, mire/swamp, mudflat, lagoon, and tidal/mouth/distal bar) and three facies associated with the fluvial delta–tidal plain facies (fluvial dominated upper delta plain, tide-dominated lower delta plain,  and marginal tidal plain and lagoon). This research identified four system tracts, namely TST-1, HST-1, TST-2, and HST-2. TST-1 and TST-2 show continuous coal deposition, inclined to steeply inclined, interspersed, and characterized by the presence of three layers of clay bands. Similarly, HST-1 and HST-2 exhibit continuous coal deposition with gentle to steep inclined and interspersed, ranging from moderately thick to very thick, and containing one to five layers of clay bands. The tectonic activity after deposition caused the deposited coal to deform. The findings of this study contributed to guiding the exploration of coal seams in the South Sumatra Basin and Muara Enim Formation, in particular.
Co-Authors A. F. H. Surbakti` Abimanyu, Gilang Adamsyah, Bayu Alpino, Muhammad Anisa Nurjanah, Anisa Anton Wijaya Apriliana, Vira Arieffiandhany, Riezal Armandani, Aditya Raihan Atthoriq, Muhammad Hafidz Aulia, Khanaya Syafarah Az zahra', Salmaa Aulia Az-zahra, Salmaa Aulia Budhi Setiawan Daffa Gamas Elcofa Dyah Hastuti, Endang Wiwik E. W. D. Hastuti Elisabet Dwi Mayasari Endang Wiwik Dyah Hastuti Endang Wiwik Dyah Hastuti Erisendy, Maretha Deva Giantaria, Anisa Gultom, Felix Mateus Exaudi Harfiandri, Muhammad Said Harnani Harnani Harnani, Harnani Helen Dwi Putri Hibatullah, Kevin Nabil Idarwati Idarwati Ismaryanto, Ismaryanto J. Ersyari Kevin Nabil Hibatullah Lestari, Suci Febria M Arief Situmorang M. Rafi Maretha Deva Erisendy Mayasari, Elisabet Dwi mega puspita Muhammad Aghil Ikhwanulsyah Muhammad Al Fajrin Khalil Gibran Muhammad Daffa Kevin Adam Muhammad Hafidz Atthoriq Muhammad Raihan Mustaqim Novita, A. F. Permana, Lano Adhitya Pranata, Ridho Putra, Hanif Kurniadi Putri, Helen Dwi R. D. Chen R. G. Utamaputra Rahmatullah, Arif Ramadan, Ikdan Rifki Muhamad Stevanus Nalendra Jati Sunarta, Jonathan Angkawijaya Wicaksono, M Dwiki Satrio Wicaksono, M. Dwiki Satrio