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All Journal Jurnal Geocelebes Geosains Kutai Basin
azisyarlina, Dwi
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Earth & Planetary Sciences

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Identifikasi Potensi Batuan Induk pada Sumur Parang G-1 Berdasarkan Analisis Geokimia dan Analisis Stratigrafi di Cekungan Biliton azisyarlina, Dwi; wati, lia nurfitriana; Mushwil, Adam Muhady; Allo La'bi, Zet Linda; Rifdahana, Fadhilah; Badaruddin, Dzul Fadil
GEOSAINS KUTAI BASIN Vol. 7 No. 2 (2024)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/geofisunmul.v7i2.1329

Abstract

Hydrocarbons, especially oil and natural gas, are important energy sources for modern civilization. Rising global demand is driving intensive and innovative hydrocarbon exploration. This research was conducted in the Belitung Basin, South Sumatra, to determine the potential of the parent rock of the Palang G-1 well and determine the thickness of the formation based on stratigraphic analysis of the Belitung Basin. The geochemically described data is secondary data that has been processed and adopted by the Geological Survey Center of the Ministry of Energy and Mineral Resources. The research results indicate that the source rock with the highest potential for hydrocarbon production is found in the Talang Akar Formation, based on several parameters such as kerogen type, TOC content, and maturity level. However, the hydrocarbons in this well are not yet fully mature and require further investigation. Stratigraphic analysis revealed that the Non-Marine Clays Formation has a thickness of 2200 ft. The Talang Akar transition layer is defined as the transition contact with the Air Benakat formation. Based on drilling data, the Talang Akar Formation has a thickness of 1300 ft. The massive sand Talang Akar Formation has a thickness of 1000 ft. The Non-Marine Clay Layer has a thickness of 1800 ft.
Analisis Pola Seismisitas Berdasarkan Nilai B-Value di Wilayah Laut Flores Rosidi, Fachrul; Azisyarlina, Dwi; Wati, Lia Nurfitriana; Munir, Rahmiati; Haryono, Arif; Imran, Muh
GEOSAINS KUTAI BASIN Vol. 8 No. 1 (2025)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/geofisunmul.v8i1.1478

Abstract

The Flores Sea, located within Indonesia's territorial waters, is an area with high volcanic and seismic activity due to its position within the Pacific Ring of Fire. The complex movement of tectonic plates frequently triggers earthquakes in this region. This study was conducted to analyze earthquake potential in three segments of the Flores Sea area based on b-value and to examine earthquake events with magnitudes ≥ 7.4 within the period from 2000 to 2023 using Matlab and Zmap applications. From the analysis, it was found that Segment 1 has a higher potential for major earthquakes due to its low b-value. Meanwhile, Segment 2 shows a b-value below 1.19, indicating a significant potential for major earthquakes. In contrast, Segment 3 exhibits a b-value above 1.11, suggesting a lower likelihood of large-scale earthquakes. However, significant earthquakes can still occur, such as the one in Lospalos in December 2021 with a magnitude of 7.6. This demonstrates that, despite lower risk based on b-value, major earthquakes remain possible. Overall, from 2000 to 2023 in the Flores Sea region, only two events were recorded with magnitudes exceeding ≥ 7.4: one in Segment 2 with a magnitude of 7.5 in 2005, and another in Segment 3 with a magnitude of 7.6 in 2021.
Subsurface Characterization using Electrical Resistivity Tomography (ERT) for Sponge City Planning in Nusantara Capital City (IKN), Indonesia: Karakterisasi Bawah Permukaan Menggunakan Geolistrik Resistivitas (ERT) untuk Perencanaan Kota Spons di Ibu Kota Nusantara (IKN), Indonesi Wahidah, Wahidah; Lepong, Piter; Supriyanto, Supriyanto; Djayus, Djayus; Firdaus, Muhamad Akmal; Azisyarlina, Dwi
JURNAL GEOCELEBES Vol. 9 No. 2: October 2025
Publisher : Departemen Geofisika, FMIPA - Universitas Hasanuddin, Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70561/geocelebes.v9i2.47083

Abstract

Clay shale dominates the lithology along access roads in the IKN development area. Its impermeable nature poses challenges to implementing the Sponge City concept, which relies on enhanced rainwater absorption to reduce surface runoff. This study aims to map the spatial distribution of clay shale and assess its implications for Sponge City planning. The geoelectrical resistivity method was applied at three sites, each consisting of one long section and three cross sections. Resistivity contrasts were used to delineate subsurface lithology, producing two- and three-dimensional models. The results reveal three main lithological units: topsoil, clay shale, and sandy clay. Topsoil shows heterogeneous resistivity values with thicknesses ranging from <1 m to 5 m. Clay shale exhibits resistivity values below 50 Ωm and thicknesses of <5–30 m, while sandy clay exceeds 50 Ωm with variable thicknesses up to 30 m. The thick, low-resistivity clay shale indicates poor permeability, which limits infiltration and groundwater storage. These findings suggest that the IKN area is less suitable for a natural sponge system. Therefore, stormwater management should prioritize engineered solutions such as green roofs, retention ponds, and bioretention facilities to control runoff and support sustainable urban development.
Co-Authors Allo La'bi, Zet Linda Badaruddin, Dzul Fadil Djayus, Djayus Firdaus, Muhamad Akmal Haryono, Arif Imran, Muh Lepong, Piter Munir, Rahmiati Mushwil, Adam Muhady Rifdahana, Fadhilah Rosidi, Fachrul Supriyanto Supriyanto Wahidah Wahidah wati, lia nurfitriana