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All Journal Justek : Jurnal Sains Dan Teknologi Petrogas : Journal of Energy and Technology
Agusti Putri, Efrina Chandra
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Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Mathematics

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Analisis Lingkungan Pengendapan Batubara Berdasarkan Kandungan Maseral di Desa Embalut Kecamatan Tenggarong Seberang Prabowo, Iwan; Alfarisi R, Muhammad Mahdivikia; Agusti Putri, Efrina Chandra; Pratikno, Fathony Akbar; Ryka, Hamriani
Justek : Jurnal Sains dan Teknologi Vol 7, No 3 (2024): September
Publisher : Unversitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/justek.v7i3.26257

Abstract

Abstract:  Kutai Kartanegara is one of the areas that has quite high coal mining potential. This study was conducted to determine the geological history or coal diagenesis in Embalut Village and its surroundings. The research method used is direct observation in the field, megascopically, and microscopic examination of coal or coal petrography which includes maceral analysis and plot diagram of Tissue Preservation Index (TPI) against Gelification Index (GI). The purpose of this study itself is specifically to provide an overview of the mechanism of coal deposition and its deposition process based on the composition of organic coal material (maceral). Based on the results of the TPI Vs GI plotting diagram, it was obtained that the organic material that became peat during deposition, the research area is classified as a lowland delta environment with peatlands in the form of swamps and fens, and in limnic to limno-telmatic depositional environmental conditions.Abstrak Kutai Kartanegara merupakan salah satu daerah memiliki potensi penambangan batubara yang cukup tinggi. Penelitian ini dilakukan untuk mengetahui sejarah geologi atau diagenensis batubara yang ada di Desa Embalut dan sekitarnya. Metode penelitian yang digunakan adalah pengamatan secara langsung dilapangan, secara megaskopis, serta pengamatan mikroskopis batubara atau petrografi batubara yang meliputi analisis maseral serta plot diagram Tissue Preservation Index (TPI) terhadap Gelification Index (GI). Tujuan dari penelitian ini sendiri secara khusus untuk memberikan gambaran mekanisme tempat pengendapan batubara serta proses pengendapannya berdasarkan komposisi material organik batubara (maseral). Berdasarkan hasil dari plotting diagram TPI Vs GI didapatkan bahwa material organic yang menjadi gambut saat terjadi pengendapan, daerah penelitian tergolong kedalam lingkungan lower delta plain dengan lahan gambut berupa marsh dan fen, serta pada kondisi lingkungan pengendapan limnic sampai limno-telmatic.
PENDEKATAN SISTEM INFORMASI GEOGRAFIS (SIG) DALAM PENENTUAN ZONA KERENTANAN TANAH: STUDI KASUS BERAMBAI, SEMPAJA UTARA, KOTA SAMARINDA Ayuningrum, Reta Andila; Ryka, Hamriani; Agusti Putri, Efrina Chandra; ., Jamaluddin
PETROGAS: Journal of Energy and Technology Vol 8, No 1 (2026): MARCH
Publisher : Sekolah Tinggi Teknologi MIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58267/petrogas.v8i1.210

Abstract

This study aims to identify the geomorphological characteristics, drainage patterns, and landslide susceptibility levels in the Berambai area and its surroundings, North Samarinda District. The research method integrates analyses of morphometric data, lithology, and geological structures. The results indicate that the study area is a single structural origin landform, divided into three landform units: undulating/sloping (s1), hilly-undulating (s2), and sharply dissected hilly/steep (S3). genetically, this region is influenced by syncline structures and a right lag slip fault, which control the development of dendritic drainage patterns in the Northwest and East, and subdendritic patterns in the Central to Southern parts. Landslide susceptibility analysis reveals a dominance of the Moderate Susceptibility Zone (60.3%), covering residential areas, followed by the high susceptibility zone (31.3%) on steep slopes with open land, and the low susceptibility zone (8.4%) in densely vegetated flatlands. The correlation between steep slopes, geological structural control, and intensive land use is the primary factor driving the high risk of ground movement in the study location
Co-Authors Alfarisi R, Muhammad Mahdivikia Ayuningrum, Reta Andila Jamaluddin Jamaluddin Prabowo, Iwan Pratikno, Fathony Akbar Ryka, Hamriani