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Journal : Journal of Geoscience, Engineering, Environment, and Technology

Control Structure On Damage Zone and Fault Plane to Geometry Of Quartz Veins and Calcite In Muaradua Ogan Komering Ulu Selatan, South Sumatra, Indonesia Budhi Setiawan; Pratama Goestyananda
Journal of Geoscience, Engineering, Environment, and Technology Vol. 7 No. 4 (2022): JGEET Vol 07 No 04 : December (2022)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2022.7.4.9411

Abstract

Geological mapping was carried out on the Gilas and Malau rivers in the Muaradua area, South Ogan Komering Ulu Regency, South Sumatra by observing the presence of joints, faults, and veins in the granite and phyllite rock outcrops of the Tarap Formation. Research on pattern geometry and vein type in the crushing zone is focused on measuring the direction (trend) of veins and joints. The measurement results are then analyzed to obtain a general pattern of quartz and calcite veins so that the orientation of their development can be known. The method used in this study is in the form of determining the orientation and geometry of the veins based on classifications that refer to several studies, then an analysis is carried out using DemNAS data to determine the general direction of the straightness pattern of the study area. The quartz veins that developed in the study area have an extensional fracture type with the geometry found in the form of isolated, abutting, cutting, mutually-cutting, and crosscutting. The veins that develop in the research area are relatively north-south and west-east and indicated the presence of a fault and traces of deformation that occurred in the study area. With the help of veins and joints found in the study area, it is possible to determine the structural control of the presence of a crushing zone in the fault plane.
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 Abdurrahman Hanif Albaihaqi Abimanyu, Gilang Aldri Frinaldi Alfiati Alfuazri, M. Gilang Ama, Fuad Andayani Andayani Andayani Andili, Agshal Almachzumi Ani Rakhmawati Anton Wijaya Arief Setyawan Arieffiandhany, Riezal Asof, H. Marwan Atikah Anindyarini Atthoriq, Muhammad Hafidz Az Zahra, Salsabila Azzahra, Fade Risa Bakri Bakri Cahyaningrum, Fitria Chaesar, Ari Suryawati Secio Chafit Ulya Charlos Togi Stevanus, Charlos Togi Dedi Rohendi Dyah Hastuti, Endang Wiwik Eddy Ibrahim Edi Riawan Edy Sutriyono Ernawati Fadhellatul Kamil Faradila, Nanda Argi Noer Farahdila, Silvie Felicity, Felicity Ferdian Syahputra Firstya Evi Dianastiti Fitriani, Aula Gallant Dwi Pangestu Nugroho Akbar Gurada Capah, Ade Indra Harfiandri, Muhammad Said Harnani Harnani Harnani Harnani Harnani, Harnani Hartati, Restiana Dwi Haryanti, Rini Dwi Hastuti, Nuri Puji Helen Dwi Putri Hermawan, Muhammad Alfian Hibatullah, Kevin Nabil Islam, Muhammad Izzul Ismaryanto, Ismaryanto KAMIL, FADHELLATUL Kartika Ishartadiati Karyadi, Rian Khakim, Mokhamad Yusup Nur Kundharu Saddhono Kurniawan, Deviyanto Landia, Karmila Putri Lee, Jason Lusiani Tjandra Marswati, Ceria Masfufatun Masfufatun Muhammad Rohmadi Muhammad Taufik Toha Mukhlis, Muhammad Munib Ikhwatun Iman Nardi, Rajhi Febri Nugraheni Eko Wardani Oman Abdurahman Pebby Putra Juenda Pebrianto, Rosihan Permana, Lano Adhitya Pranata, Ridho Pratama Goestyananda Pratika Yuhyi Hernanda Putri, Atika Nabila Putri, Helen Dwi Putri, Zahrah Belinda RAHARJO, BUDIONO Rahaya, Ivana Septia Raheni Suhita Rahmatullah, Arif Ramadhani, Asri Kamila Rifki Aditya, Rifki Rina Sahara Rio, Ferdinan Rizki, Kurnia Rahma Rizkie, Dania Rosihan, Pebrianto Sabaruddin Sabaruddin Safrihady, Safrihady Santoso, Nugroho Ponco Santoso, Nugroho Ponco Sari, Fatrina Aprilia Sarwiji Suwandi Setyaningsih, Arinda Oktariski Simanjuntak, Presli Panusunan Slamet Subiyantoro Sumarwati Suyeda, Fadhil D. Tri Indrayanti Utami, Sri Lestari Wahdini, Lisa Wahyu Wardana, Muhammad Aditya Wisnu Wicaksono, M Dwiki Satrio Wicaksono, M. Dwiki Satrio Wijaya, Wildan Maulana Wulandari, Atik Sri Wulandari, Zhalsa Yogie Zulkurnia Rochmana Yuliningsih, Yuliningsih