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All Journal Komunikasi Fisika Indonesia TAMBANG Jurnal Ilmiah MTG Jurnal IPTEK Journal of Geoscience, Engineering, Environment, and Technology Jurnal Penelitian Sains Jurnal Geomine Jurnal Ilmiah Universitas Batanghari Jambi PROMINE Jurnal Mineral, Energi dan Lingkungan Jambura Geoscience Review Jurnal Mineral, Energi dan Lingkungan Journal of Earth and Marine Technology (JEMT) Prosiding Seminar Nasional Teknologi Industri Berkelanjutan Berita Sedimentologi Jurnal Ilmiah Geologi pangea Journal of Geology Sriwijaya
Idarwati Idarwati
Teknik Geologi, Fakultas Teknik, Universitas Sriwijaya, Sumatera Selatan 30862, Indonesia
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SEBARAN UNSUR TANAH JARANG DI SEBELAH BARAT LAUT LAPANGAN PANAS BUMI GUNUNG LAWU, KARANGANYAR, JAWA TENGAH Dian Rahma Yoni, S.T., M.T.; Intan Paramita Haty; Septyo Uji Pratomo; Setia Pambudi; Afrilta Afrilita; Idarwati Idarwati
Jurnal Ilmiah MTG Vol 13, No 2 (2022): Jurnal Ilmiah MTG Volume 13 No. 2, Desember 2022
Publisher : Jurusan Teknik Geologi Fakultas Teknologi Mineral UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmtg.v13i3.9394

Abstract

Sari -  Lokasi panas bumi Gunung Lawu terletak di perbatasan Jawa Tengah dan Jawa Timur, Indonesia. Secara spesifik, sumber panas bumi Gunung Lawu pada penelitian ini terletak di sekitar lereng gunung sebelah barat. Hal ini ditandai dengan keberadaan manifestasi berupa air panas pada wilayah Bayanan, Balong dan Ngunut.  Manifestasi air panas yang terdapat di permukaan merupakan hasil dari proses interaksi fluida air dengan batuan di bawah permukaan bumi yang kaya akan mineral dan unsur tanah jarang. Sehingga mata air panas yang terbentuk melalui proses ini dapat mengandung unsur tanah jarang dalam jumlah yang signifikan. Penelitian ini bertujuan untuk mengetahui sebaran unsur tanah jarang yang ada di lapangan panas bumi Gunung Lawu khususnya di bagian Barat Laut serta proses interaksi yang terjadi bawah permukaan. Metode yang digunakan untuk mengetahui kandungan unsur tanah jarang dengan menggunakan analisis Inductively Coupled Plasma Mass Spectrometry (ICP-MS). Proses interaksi fluida dengan batuan ditunjukkan oleh beberapa unsur tanah jarang. Belum ada penelitian sebelumnya mengenai interaksi antara batuan dan fluida yang berkaitan dengan unsur tanah jarang di wilayah ini. Oleh karena itu, diharapkan hasil penelitian ini dapat memberikan data dan informasi yang bermanfaat bagi peneliti di masa depan. Kata Kunci: Panas Bumi, Gunung Lawu, Unsur tanah jarang, ICP-MSAbstract - Lawu's geothermal field is located between Central Java and East Java, Indonesia. Specifically, Mount Lawu's geothermal resources in this study are located around the mountain's western slopes. This is marked by the existence of manifestations in the form of hot water in the Bayanan, Balong, and Ngunut areas. The manifestation of hot water found on the surface results from a process of interaction of water fluids with rocks beneath the earth's surface rich in minerals and rare earth elements. So hot springs formed through this process can contain significant amounts of rare earth elements. This study aims to determine the distribution of rare earth elements in the Mount Lawu geothermal field, especially in the Northwest part and the interaction processes that occur below the surface. The method used to determine the content of rare earth elements is by using Inductively Coupled Plasma Mass Spectrometry (ICP-MS) analysis. Some rare earth elements show the process of fluid interaction with rocks. There has been no previous research on the interaction between rocks and fluids related to rare earth elements in this region. Therefore, it is hoped that the results of this study can provide valuable data and information for future researchers. Keyword: Geothermal, Mount Lawu, Rare earth elements, ICP-MS
PETROLOGI BATUBARA FORMASI MUARAENIM, SUB-CEKUNGAN PALEMBANG SELATAN Idarwati Idarwati
Jurnal Ilmiah Geologi PANGEA Vol 5, No 1 (2018): Jurnal Ilmiah Geologi PANGEA
Publisher : PROGRAM STUDI TEKNIK GEOLOGI FAKULTAS TEKNOLOGI MINERAL UPN VETERAN YOGYAKARTA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jigp.v5i1.5200

Abstract

Sari – Cekungan Sumatera Selatan merupakan cekungan sedimenter yang mengandung hidrokarbon danbatubara yang terdiri dari empat sub cekungan salah satunya adalah Sub-Cekungan Palembang Selatan.Karakteristik sub-cekungan ini memiliki formasi pembawa lapisan batubara yang sangat produktif yaitu FormasiMuaraenim. Faktor penting dalam produksi batubara dalam kegiatan eksplorasi yaitu peringkat batubara (coalrank). Memahami coal rank berkaitan erat dengan memang terkenal dengan potensi batubara. Salah satuformasi pembawa batubara yang potensial di Cekungan Sumatera Selatan adalah Formasi Muara Enim.Kata-kata Kunci : batubara, Formasi Muara Enim, coal rank
Characteristic and Provenance of Talang Akar Formation Sandstone, Sukamoro Area, South Sumatera Yogie Zulkurnia Rochmana; Idarwati Idarwati; Harnani Harnani; Elisabet Dwi Mayasari
Jurnal IPTEK Vol 27, No 1 (2023)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2023.v27i1.4434

Abstract

Sukamoro area, Banyuasin Regency, South Sumatera, was the research location. This investigation focuses on the origin of sandstones from the Talang Akar Formation. In the area of investigation, sandstones are widely dispersed and exhibit a variety of properties. Due to the abundance of sandstones found and their high resistance and physical compactness, an analysis of the original rock can be carried out. Generally, the material that makes up sandstone comes from the previous rock. This investigation was undertaken using a descriptive-analytical methodology to determine the origin of the rock. The collected surface data is subsequently petrographically examined. After determining the composition of the constituent minerals, a provenance analysis was conducted to determine that the Talang Akar Formation's sandstones originated from the Magmatic Arc. Furthermore, the Talang Akar sandstone reveals the origin of the Recycle Orogen. Thus, it is considered that the sandstones of the Talang Akar Formation have seen many uplift episodes as a result of tectonic activity, almost to the point where they have experienced an increase in the maturity or stability of their continental block provenances
Macrofossil Characteristics and Bathymetric Environment of Sumber Makmur Village, Muara Sahung, Kaur, Bengkulu Dita Maulia; Idarwati Idarwati
Journal of Earth and Marine Technology (JEMT) Vol 4, No 1 (2023)
Publisher : Lembaga Penelititan dan Pengabdian kepada Masyarakat - Institut Teknologi Adhi Tama Suraba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jemt.2023.v4i1.4651

Abstract

The research location is administratively located in Sumber Makmur Village, Muara Sahung District, Kaur Regency, Bengkulu Province. In the study area, outcrops that had fossils were found, which were shown by the presence of carbonate rock lithology. The study was conducted to determine the deposition environment in the research area. The method used is a previous literature study that aims to determine the physical geological conditions and regional stratigraphy of the research area. Furthermore, field observations and laboratory analysis were conducted in the form of paleontological analysis to determine the characteristics and types of fossils found in the study area. Paleontological research was conducted on two formations, namely the Lemau Formation and the Simpangaur Formation. In the Lemau Formation, several species of benthic foraminifera were found, namely Cibicides praecinestus, Elphidium macelium, Marginopora vertebralis, Elphidium articulatum, and Planorbulina mediterranensis. Then, in the Simpangaur Formation, several species of benthic foraminifera were found, namely Streblus beccari, Bolivina schwageriana, Anomalinella rostrate, Cibides praecinestus, Cibides margaritiferus, Lagena sulcata, Quinqueloculina bradyana, and Lenticulina calcar. In addition, macrofossils were found in marine life with phylum mollusks such as Lunatia elevatum, Murex vanuxemi, Turritella terebra, Conus sauridens, and Plocostoma neumayeri. Based on these data, it can be interpreted that the depositional environment in the study area is in the Transition-Edge Neritic marine environment.
Studi Awal Potensi Underground Coal Gasification (UCG) Daerah Muara Tiga Besar, PT. Bukit Asam, Kabupaten Lahat, Sumatera Selatan M. Ridho Naufalwan; Idarwati Idarwati
Jurnal Mineral, Energi dan Lingkungan Vol 7, No 1 (2023): Juni
Publisher : Fakultas Teknologi Mineral, Universitas Pembangunan Nasional (UPN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmel.v7i1.10247

Abstract

Batubara dengan kualitas rendah sebagian besar belum dieksploitasi karena kadar air yang tinggi dan nilai kalor yang rendah. Konversi batubara berperingkat rendah menjadi gas merupakan salah satu alternatif dalam pemanfaatan batubara yang kurang ekonomis ada di Indonesia. Namun, Hingga kini bahasan mengenai potensi batubara Indonesia dalam kegiatan pengembangan Underground Coal Gasification (UCG) masih sangat terbatas. Oleh karena itu, studi awal potensi UCG perlu dilakukan pada daerah Muara Tiga Besar (MTBU), PT. Bukit Asam, Kabupaten Lahat, Sumatera Selatan. Metode penelitian yang diterpakan pada kegiatan penelitian ini tediri atas analisis laboratorium dan kerja studio. Kuailitas batubara pada dearah penelitian memiliki nilai kalori 12.733-13.131 btu/lb yang termasuk kedalam batubara peringkat High volatile B Bituminous Coal hingga High volatile C Bituminous Coal. Hasil pemodelan 2D pada daerah penelitian menunjukkan bahwa tidak terdapat struktur geologi sehingga lapisan batubara menerus hingga kedalaman lebih dari 300 meter. Hasil estimasi sumberdaya batubara Seam batubara pada daerah penelitian menggunakan metode circular memiliki sumberdaya sebesar 133,667,971.16 ton.
Studi Awal Potensi Underground Coal Gasification (UCG) Daerah Muara Tiga Besar, PT. Bukit Asam, Kabupaten Lahat, Sumatera Selatan M. Ridho Naufalwan; Idarwati Idarwati
Jurnal Mineral, Energi dan Lingkungan Vol 7, No 1 (2023): Juni
Publisher : Fakultas Teknologi Mineral, Universitas Pembangunan Nasional (UPN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmel.v7i1.10247

Abstract

Batubara dengan kualitas rendah sebagian besar belum dieksploitasi karena kadar air yang tinggi dan nilai kalor yang rendah. Konversi batubara berperingkat rendah menjadi gas merupakan salah satu alternatif dalam pemanfaatan batubara yang kurang ekonomis ada di Indonesia. Namun, Hingga kini bahasan mengenai potensi batubara Indonesia dalam kegiatan pengembangan Underground Coal Gasification (UCG) masih sangat terbatas. Oleh karena itu, studi awal potensi UCG perlu dilakukan pada daerah Muara Tiga Besar (MTBU), PT. Bukit Asam, Kabupaten Lahat, Sumatera Selatan. Metode penelitian yang diterpakan pada kegiatan penelitian ini tediri atas analisis laboratorium dan kerja studio. Kuailitas batubara pada dearah penelitian memiliki nilai kalori 12.733-13.131 btu/lb yang termasuk kedalam batubara peringkat High volatile B Bituminous Coal hingga High volatile C Bituminous Coal. Hasil pemodelan 2D pada daerah penelitian menunjukkan bahwa tidak terdapat struktur geologi sehingga lapisan batubara menerus hingga kedalaman lebih dari 300 meter. Hasil estimasi sumberdaya batubara Seam batubara pada daerah penelitian menggunakan metode circular memiliki sumberdaya sebesar 133,667,971.16 ton.
Facies Analysis From Kikim Formation in Garba Mountain, South Palembang Subbasin Daryono, Sapto Kis; Afrilita, Afrilita; Idarwati, Idarwati
Jurnal Ilmiah MTG Vol 14, No 2 (2023): Jurnal Ilmiah MTG Volume 14 No.2 Tahun 2023
Publisher : Jurusan Teknik Geologi Fakultas Teknologi Mineral UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmtg.v14i2.11854

Abstract

The Kikim Formation, especially the Cawang Member, has an important role in the formation and stratigraphic evolution of Paleogene age sedimentary rocks in the South Sumatra Basin because of their presence as pre-rift deposits. These deposits occurred before or simultaneously with the basin's formation. The results of research regarding facies analysis and interpretation of the depositional environment of the Kikim Formation located in the Garba Mountains will provide an explanation and description of the history of the formation and stratigraphic evolution of Paleogene age sedimentary rocks in the South Sumatra Basin as reflected in their lithological and facies characteristics. Facies analysis was conducted on the stratigraphic cross-section of the conglomerate deposit and sandstone deposit 1. The conglomerate deposit and sandstone deposit had thicknesses of ± 158.82 m and ± 177.50 m, respectively, on the Bumi Agung and Batu Belang measurement lines, South Ogan Komering Ulu area, Sumatra South. Facies analysis leads to the division of facies according to Miall (1978), namely eight lithofacies, namely Gravel matrix supported massive (Gmm), matrix supported Gravel (Gmg), massive Gravel (Gm), massive Sandstone (Sm), horizontally bedded Sandstones (Sh), low angel cross-bedding Sand (SI), Carbonaceous mud (C), massive Fine sandstone silt mud (Fm), Massive siltstones, and mudstones (Fsm). The facies associations obtained were Gravel Bars (GB), Sandy Bedforms (SB), channel (CH), and Overbank fine (FF). It showed that the depositional environment was a fluvial environment, and it was found that the type of river in the research area in the Kikim Formation was a braided river with Gravel braided rivers with sedimentary gravity flows model.
Deposition Environment Interpretation of Lemat Formation in the West Tanjung Jabung, Jambi Province Daryono, Sapto Kis; Afrilita, Afrilita; Idarwati, Idarwati
Journal of Earth and Marine Technology (JEMT) Vol 4, No 2 (2024)
Publisher : Lembaga Penelititan dan Pengabdian kepada Masyarakat - Institut Teknologi Adhi Tama Suraba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jemt.2024.v4i2.5626

Abstract

The study of facies analysis and interpretation of the depositional environment of the Lemat Formation located on Bukit Tigapuluh aimed to clarify the problems found in Paleogene sediments in the South Sumatra Basin. The results of research on facies analysis and interpretation of the depositional environment of the Lemat Formation will provide an explanation and description of the history of the formation and stratigraphic evolution of Paleogene-aged sedimentary rocks in the South Sumatra Basin as reflected in their lithological and facies characteristics. A detailed analysis of fluvial facies was carried out in the West Tanjung Jabung area, Jambi Province. A stratigraphic cross-section was prepared with an accumulated thickness of ± 25 m. The stratigraphic section included two rock deposits, namely sandstone-quartz deposits and conglomerate deposits. Analysis of lithofacies and architectural elements of the study area indicated a fluvial depositional environment. The resulting architectural elements consisted of six associations: channel (CH), scour hollows (HO), gravel bedform (GB), sediment gravity flows (SG), sandy bedform (SB), and floodplain fines (FF). The dominance of sedimentary material, which tends to be coarse, and the many facies associations GB, SG, and SB indicated many river bars and were characteristic of braided rivers. The obtained interpretation of the depositional environment was Conglomerate deposits in the Alluvial Fans System with Gravity Flow River environment or gravel bed braided river, and sandstone-gravel deposits in the shallow environment or gravel bed braided river.
Provenance and Petrographic Analysis of Paleogene Sandstones in the Bukit Tigapuluh Area, Jambi Subbasin, Indonesia Daryono, Sapto Kis; Idarwati, Idarwati
Journal of Earth and Marine Technology (JEMT) Vol 4, No 2 (2024)
Publisher : Lembaga Penelititan dan Pengabdian kepada Masyarakat - Institut Teknologi Adhi Tama Suraba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jemt.2024.v4i2.5627

Abstract

The study investigates the provenance of Paleogene sandstone deposits from the Lemat Formation in the Lubuk Lawas and Lubuk Bernai sections of the Bukit Tigapuluh area, Jambi Subbasin, South Sumatra Basin, Indonesia. The research aims to elucidate the formation history and stratigraphic evolution of these sedimentary rocks through detailed petrographic analysis. Twenty-two rock samples were analyzed to classify the sandstones and determine their source rock types and tectonic settings. The results indicate that the sandstones are primarily classified as Lithic Arkose, Arkosic Subarkose, Feldspathic Litharenite, Silty Claystone, Sublitharenite, and Subarkosic Wacke. The provenance analysis suggests that these sandstones originated from a tectonic setting of a recycled orogenic zone, comprising quartzose recycled, transitional recycled, and mixed sources, indicating a combination of primary and recycled orogenic materials. Paleocurrent analysis from sedimentary structures in the Lubuk Bernai area suggests deposition directions from the southwest and southeast. This study provides significant insights into the paleogeography and tectonic evolution of the Lemat Formation within the Jambi Subbasin. Further research should focus on integrating geochemical data to refine the understanding of sedimentary provenance and tectonic implications.
Comprehensive Facies Analysis and Depositional Environments of the Kikim Formation, Garba Mountain, South Palembang Subbasin, Indonesia Daryono, Sapto Kis; Idarwati, Idarwati
Journal of Earth and Marine Technology (JEMT) Vol 4, No 2 (2024)
Publisher : Lembaga Penelititan dan Pengabdian kepada Masyarakat - Institut Teknologi Adhi Tama Suraba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jemt.2024.v4i2.5628

Abstract

This study provides an exhaustive facies analysis of the Kikim Formation within the Garba Mountain area of the South Palembang Subbasin, emphasizing the stratigraphic significance and depositional environments during the Paleogene period. Utilizing field data collected from the Bumi Agung and Batu Belang measurement lines, this research categorizes various lithofacies using Miall’s (1978) classification scheme, identifying eight distinct lithofacies and four facies associations indicative of a predominantly fluvial depositional setting. The results depict a detailed sedimentological framework, showing that the Kikim Formation was characterized by a braided river system with significant gravel and sandstone deposits. This analysis not only sheds light on the geological history and processes shaping the South Sumatra Basin but also enhances the understanding of its potential hydrocarbon reservoirs. By detailing the lithological diversity and facies distribution, this paper contributes to the broader geological knowledge required for effective exploration and management of the region's natural resources.
Co-Authors Aditya N.P.H Afrilita, Afrilita Afrilta Afrilita Alan Triyoga Alan Triyoga Alan Triyoga, Alan Daryono, Sapto Kis Dian Rahma Yoni, S.T., M.T. Dita Maulia Dyah Hastuti, Endang Wiwik Elisabet D. Mayasari Elisabet Dwi Mayasari Febrian, Muhammad Rizky Harnani Harnani Harnani, Harnani Hibatullah, Muhammad Ariq Intan Paramita Haty M. Ridho Naufalwan Maharani, Widyana Maulia, Dita Mayasari, Elisabet Dwi mega puspita Mifturrahma, Rizkiya Mutia Armilia Rahmawati Mutia Armilia Rahmawati Mutia Armilia Rahmawati, Mutia Armilia Oke Aflatun Pranata, Ridho Prasetya, Dyo Pratomo, Septyo Uji Rahmadani, Gea Fanny Rahmanita, Dwie Saputra, Pirdaus Setia Pambudi Siska Linda Sari Siska Linda Sari Siska Linda Sari, Siska Linda Stevanus Nalendra Stevanus Nalendra Jati Syaharani, Puan Rahima Yogie Zulkurnia Rochmana Yusar, Adri Taufiqurrahman