Article Per Year (5 Year)
p-Index From 2020 - 2025
3.329
P-Index
This Author published in this journals
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
Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Transportation

Published : 34 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 34 Documents
Search

 1   2   3   4 
Neogene Coal Characteristics and Depositional Environments in the Kikim Area of South Sumatra Basin; Insights from logging, proximate test, sulfur test and electrofacies Idarwati, Idarwati; Maulia, Dita
Berita Sedimentologi Vol 50, No 1 (2024)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51835/bsed.2024.50.1.460

Abstract

Neogene coal is the main producer in the Kikim area (Gumay Talang District, Lahat Regency) of South Sumatra Basin and is part of the Muaraenim Formation. However, the characteristic and depositional environment of this Neogene coal are still poorly understood. This research was conducted to determine the characteristics and distribution model of coal seams, as well as its depositional environment. Coal seam characteristics include thickness, description, coal rank, depositional structure, and coal seam depositional environment. The methods used in this research are well-logging, proximate and ultimate tests, and electro facies. Geophysical logging analysis was carried out at four drilling points. The results of the analysis from well logging found four seams in order from youngest to oldest seam, namely seam B, seam C, seam D, and seam E. Seam B has the most significant thickness, namely 9.55 meters, Seam C 2.29 meters, seam D 4.90 meters and Seam E 2.10 meters. The ASTM classification shows that the coal seam is included in the coal rank Sub-bituminous B – Sub-bituminous A. The determination of coal rank uses the ASTM D-388 classification, which aims to identify the coal grade. The parameters used in determining coal rank are fixed carbon content, calorific value, and volatile matter. The depositional structure found at the research location is split. The depositional environment interpretation of coal seams uses three parameters lithofacies, sulphur content and electro facies. Our research revealed that the study area's depositional environment is in the upper delta plain in the backswamp-floodplain section.
Morphological Identification based on Lineament and Density Pulai Pinang Region and Surroundings Lahat District, Province South Sumatra Hibatullah, Muhammad Ariq; Dyah Hastuti, Endang Wiwik; Idarwati, Idarwati
Journal of Geology Sriwijaya Vol 3 No 1 (2024): The Journal of Geology Sriwijaya
Publisher : Teknik Geologi, Fakultas Teknik, Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62932/jgs.v3i1.2383

Abstract

Morphological identification based on lineament and geological structure analysis has beencarried out in Pulau Pinang Village and its surroundings, Lahat Regency, South SumatraProvince. The initial stage in identification uses a remote sensing approach through lineamentanalysis using DEMNAS data. This research is focused on lineament analysis with DigitalElevation Model (DEM) data to identify geological and morphological structures in the studyarea. The methods used in the research are observative, analytic and interpretive. Theresearch was conducted with DEMNAS data which was then extracted using PCI Geomaticasoftware and after that it was correlated with geological structure data in the field. Lineamentanalysis used is the length, orientation and density of the lineament. This study aims tointerpret the relationship between lineament data and the results of field data. The researchlocation is controlled by the geological structure, namely fracture and morphology. Based onthis research, data obtained, the Pulau Pinang area is composed of fractures which areanalyzed to produce a right horizontal fault and 3 geomorphic units / landforms, namely theIrregular Meander Channel (CIM), Steep Slope High Hills (PTBC), Denudasional Hills (PD),and Low Hills (PR).
Macrofossil Characteristics and Bathymetric Environment of Sumber Makmur Village, Muara Sahung, Kaur, Bengkulu Maulia, Dita; 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.
Analisis Geomorfologi Terhadap Mitigasi Bencana, Daerah Cibadak Dan Sekitarnya, Kecamatan Citeureup, Kabupaten Bogor, Jawa Barat. Febrian, Muhammad Rizky; Idarwati, Idarwati
Prosiding SENASTITAN: Seminar Nasional Teknologi Industri Berkelanjutan Prosiding SENASTITAN Vol. 05 2025
Publisher : Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Penelitian geomorfologi di daerah Cibadak dan sekitarnya, Kecamatan Citeureup, Kabupaten Bogor, Jawa Barat, dilakukan untuk memahami kompleksitas proses geologi yang membentuk bentang alam wilayah tersebut. Variasi morfologi dan morfometri yang signifikan memberikan wawasan penting mengenai dinamika lahan dan potensi mitigasi bencana. Penelitian ini bertujuan untuk menganalisis karakteristik geomorfologi yang mencakup aspek morfografi, morfometri, dan morfogenesa guna memahami proses geomorfik yang mempengaruhi pembentukan bentang alam serta implikasinya terhadap penggunaan lahan dan pengelolaan lingkungan. Metode yang digunakan meliputi observasi lapangan dan analisis data berbasis Sistem Informasi Geografis (SIG) dengan perangkat lunak seperti ArcGIS dan Global Mapper. Data yang dikumpulkan terdiri dari peta elevasi, kemiringan lereng, pola aliran sungai, serta foto bentang alam untuk mendukung identifikasi satuan geomorfik. Hasil penelitian menunjukkan adanya enam satuan geomorfik, yaitu Perbukitan Lereng Curam, Perbukitan Rendah Lereng Curam, Bukit Gamping, Bukit Intrusi, Dataran Banjir, dan Sungai Sinous. Analisis morfometri mengidentifikasi variasi kemiringan lereng yang signifikan, sementara analisis pola aliran menunjukkan dominasi pola radial dan paralel. Temuan ini dapat menjadi acuan penting dalam mitigasi bencana.
Identification of Relative Age and Depositional Environment of Gumai Formation Based on Characteristics of Planktonic and Benthonic Foraminifera in Carbonaceous Sandstone, Keban Agung Area, Lahat Regency, South Sumatra Province Yusar, Adri Taufiqurrahman; Idarwati, Idarwati
Jambura Geoscience Review Vol 7, No 2 (2025): Jambura Geoscience Review (JGEOSREV)
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jgeosrev.v7i2.29892

Abstract

The administrative location of the study area is in Keban Agung area, Lahat Regency, South Sumatra Province. This study aims to determine the age and depositional environment of the Gumai Formation of the study area based on the characteristics of planktonic and benthonic Foraminifera found. The abundant distribution of Carbonatan sandstone is an attraction to determine the depositional environment of the study area. The methods used in this research are literature study, field observation, micropaleontological analysis with relative age inference and micropaleontological analysis with P/B ratio calculation. Planktonic foraminifera fossils found in the study area are Orbulina universa, Globigerina praebulloides, Globigerina seminulina, Catapsydrax dissimilis, and Globigerinoides obliquus and benthonic foraminifera fossils found in the study area are Tubinella Inornata, Astrononion stelligerum, Hoglundina elegans, Quinqueloculina lamarckiana and Cibicides robertsonianus, then obtained the age and environment of deposition of the Gumai Formation in the study area based on the method of drawing relative age (Blow, 1969) and the P / B ratio, namely Early Miocene - Middle Miocene and Neritic Edge - Middle Neritic.
Mapping Flood-Prone Zone Using CMA and NDWI in Muaradua District, South OKU Rahmanita, Dwie; Idarwati, Idarwati
Jambura Geoscience Review Vol 7, No 2 (2025): Jambura Geoscience Review (JGEOSREV)
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jgeosrev.v7i2.28483

Abstract

Flooding is a recurring disaster in Indonesia, especially in vulnerable areas such as Muaradua District, South Ogan Komering Ulu. This study aims to delineate flood-prone zones using an integrated approach that combines Composite Mapping Analysis (CMA) and the Normalized Difference Water Index (NDWI). Six environmental parameters river density, soil type, land cover, rainfall, elevation, and slope gradient were processed using Geographic Information Systems (GIS) to generate a vulnerability index. Sentinel-2 imagery was used to detect actual inundation through NDWI computation. The findings show that 43.08% of the study area is slightly vulnerable, 33.02% vulnerable, and 4.59% very vulnerable, while NDWI analysis revealed that 12.31% of the total area was inundated. High-risk villages such as Pasar Muaradua and Pancur Pungah exhibited flood exposure levels exceeding 29%. Spatial overlay analysis demonstrated strong concordance between model-based vulnerability and observed inundation, validating the robustness of the integrated method. These results provide critical input for spatial planning and targeted flood mitigation efforts in the region.
Diagenetic Controls on Porosity in Sandstones of the Talang Akar Formation: A Case Study from the Rambangnia River Track, South OKU, South Sumatra Rochmana, Yogie Zulkurnia; Jati, Stevanus Nalendra; Puspita, Mega; Idarwati, Idarwati; Pranata, Ridho
Jurnal IPTEK Vol 29, No 1 (2025)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2025.v29i1.6746

Abstract

Porosity contributes to fluid storage and determines reservoir quality. The higher the porosity, the more free space is available to store fluid. However, the porosity of reservoirs, particularly the sandstones of the Talang Akar Formation of the Rambangnia River track, is not always good. The diagenetic process in the formation of sandstones is thought to contribute to variations in porosity quality. This study aims to determine the control of diagenesis on the porosity of sandstones of the Talang Akar Formation of the Rambangnia River, South Sumatra. The research methods used were field observation, petrographic, diagenesis, and porosity analysis. Based on petrographic analysis, the study area has three types of sandstone: lithic wacke, sublitharenite, and litharenite. The study of diagenesis shows that the sandstones in the Rambangnia River’s Talang Akar Formation have gone through an intense compaction phase, dissolution, cementation by silica and calcite minerals, and an authigenic phase in clay minerals.  In general, the porosity of rocks in the study area ranges from fair to good.
Characteristic and Provenance of Talang Akar Formation Sandstone, Sukamoro Area, South Sumatera Rochmana, Yogie Zulkurnia; Idarwati, Idarwati; Harnani, Harnani; Mayasari, Elisabet Dwi
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
Studi Litofasies dan Lingkungan Pengendapan Berdasarkan Analisis Stratigrafi Daerah Tanjung Baru, Ogan Komering Ulu, Sumatera Selatan Prasetya, Dyo; Idarwati, Idarwati
Jurnal Penelitian Sains Vol 27, No 2 (2025)
Publisher : Faculty of Mathtmatics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56064/jps.v27i2.1175

Abstract

Pengendapan material sedimen klastik yang bervariasi membuat material sedimen terendapkan pada daerah dengan ciri fasies yang berbeda. Fasies ini berkaitan dengan penggambaran litofasies serta asoasi fasies pada suatu daerah. Litofasies dan asosiasi fasies pada Daerah Tanjung Baru, Kecamatan Baturaja Timur, Ogan Komering Ulu, Sumatera Selatan belum dilakukan secara komperehensif, sehingga penelitian ini bertujuan untuk mendalami pada tahap litofasies dan asosiasi fasies untuk mengetahui karakteristik pengendapan dan lingkungan pengendapan Daerah Tanjung Baru, Kecamatan Baturaja Timur, Ogan Komering Ulu, Sumatera Selatan. Metode yang digunakan adalah observasi lapangan dan analisis stratigrafi dengan pengukuran penampang stratigrafi. Stratigrafi daerah penelitian berfokus pada satu formasi, yaitu Formasi Gumai. Pengukuran penampang stratigrafi ini dilakukan pada dua lintasan di Desa Tanjung Baru dan Desa Air Lekisbadak. Pada lintasan pertama disusun oleh tiga litologi berupa batupasir, batuserpih, dan batulempung dengan empat litofasies berupa batupasir perlapisan (Ssb), Litofasies batupasir laminasi (Ssl), Litofasies batuserpih laminasi (Sl), dan Litofasies batulempung massif (Cm). Pada lintasan kedua disusun oleh oleh tiga litologi berupa batupasir, batuserpih, dan batulempung dengan empat litofasies berupa batupasir perlapisan (Ssb), Litofasies batuserpih laminasi (Sl), dan Litofasies batulempung massif (Cm). Berdasarkan lintasan petama dan kedua terdapat tiga jenis struktur sedimen berupa massif, laminasi, dan perlapisan yang mana menujukkan bahwa adanya energi dan transportasi yang tinggi. Hal ini didukung dengan oleh asosiasi fasiesnya pada lintasan pertama adalah mixed flat dan lintasan kedua adalah tidal channel dengan lingkungan pegendapan intertidal daerah pasang surut yang sangat dipengaruhi oleh kenaikan dan penurunan muka air laut.
Studi Lingkungan pengendapan Formasi Bentang berdasarkan Karakteristik Mikrofosil pada Batupasir Gampingan, Daerah Karanglayung, Kabupaten Tasikmalaya, Provinsi Jawa Barat. Maharani, Widyana; Idarwati, Idarwati
Jurnal Penelitian Sains Vol 26, No 3 (2024)
Publisher : Faculty of Mathtmatics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56064/jps.v26i3.1027

Abstract

Letak administrasi daerah penelitian berada pada daerah Karanglayung, Kabupaten Tasikmalaya, Provinsi Jawa Barat. Penenlitian ini bertujuan untuk mengentahui lingkungan pengendapan Formasi Bentang daerah penelitian berdasarkan karakteristik mikrofosil yang ditemukan. Sebaran batupasir gampingan yang melimpah menjadi daya tarik untuk mengetahui lingkungan pengendapan daerah penelitian. Metode yang digunakan dalam penelitian ini yaitu studi pustaka, observasi lapangan dan analisis mikropaleontologi dengan perhitungan rasio P/B. Fosil foraminifera bentonik yang ditemukan pada daerah penelitian yaitu Tubinella funalis, Marsipella elongata,Rectobolivina collumelaris, Hyperammina friabilis dan Amphitremoidea granulosaLingkungan pengendapan Formasi Bentang pada daerah penelitian berdasarkan rasio P/B yaitu Neritik Tengah
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