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All Journal IJOG : Indonesian Journal on Geoscience Jurnal RISET Geologi dan Pertambangan BULLETIN OF THE MARINE GEOLOGY KURVATEK Indonesian Journal on Geoscience Indonesian Journal on Geoscience Jurnal Geominerba Berita Sedimentologi Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources)
Andi Agus Nur
Fakultas Teknik Geologi, Universitas Padjadjaran
Chemistry Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Social Sciences Other

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Seismic Expression of Paleogene Talangakar Formation - Asri & Sunda Basins, Java Sea, Indonesia Dwandari Ralanarko; Deni Wahyuadi; Pranowo Nugroho; Wrahaspati Rulandoko; Ildrem Syafri; Abdurrokhim Almabrury; Andi Agus Nur
Berita Sedimentologi Vol 46, No 1 (2020)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4935.021 KB) | DOI: 10.51835/bsed.2020.46.1.58

Abstract

The Asri and Sunda Basin are located offshore Southeast Sumatra under the SE Sumatera Production Sharing Contract (PSC). Currently, Pertamina Hulu Energi OSES operates in the Asri and Sunda Basins, known as Southeast Sumatra (SES) Block. As one of Indonesian prime oil and gas producing area in the past 50 years, these basins have produced cumulatively more than 1,500 MMBOE with an average of 90,000 BOPD. Both Asri and Sunda Basins are part of a series of Cenozoic half grabens developed on the Asian continental margin, that have occupied a retro arc setting since early Neogene times.Hydrocarbon exploration activities in the offshore southeastern Sumatra began with a signed agreement of Contract Sharing between IIAPCO (Independent Indonesian American Petroleum Company) and Pertamina on 6 September 1968.The contract area included the offshore areas east of Sumatra and south of Bangka - Belitung Islands, covering an area of 124,000 km2. After the final relinquishment in 2008, the current PSC boundary covers an area of 5,851 km2.This paper presents the results of integrated petroleum geosciences framework, its implications for Oligo-Miocene reservoirs and hydrocarbon prospectivity of the basins using near field exploration approaches. A four-fold division comprising rift initiation, rift climax, immediate post rift and late-post rift stages of basin evolution characterize the basin filling. Seismic expression of these kinematic units gives an idea about the linkage of their deposition with different stages of rift evolution. The present study has also identified a new potential play concept in Oligo -Miocene reservoirs.
INVENTARISASI POTENSI LOGAM TANAH JARANG MENGGUNAKAN METODE GEOFISIKA DI DAERAH AIRBARA, KABUPATEN BANGKA SELATAN, KEPULAUAN BANGKA BELITUNG Silti Salinita; Asep Bahtiar Purnama; Andi Agus Nur; Yuyun Yuniardi
JURNAL GEOMINERBA (JURNAL GEOLOGI, MINERAL DAN BATUBARA) Vol 8 No 1 (2023): Jurnal Geominerba - 2023
Publisher : PPSDM Geominerba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58522/ppsdm22.v8i1.130

Abstract

The development of Rare Earth Elements (REE) based industries is still facing obstacles, even though rare earth elements have a very strategic role in the future. The purpose of this study is to determine the potential of sulfide-bearing rock resources from the modeling results as a basis for deciding LTJ prospect areas that can be further developed for the preparation of Mining Business Permit Areas. The research area is in Airbara Village, Airgegas District, South Bangka Regency, Bangka Belitung Islands Province. The method used is geoelectrical Induced Polarization (IP) measurements to determine the subsurface geological conditions. Based on direct field observations, the geomorphology of the study area is divided into three geomorphological units: lowland fluvial units, denudational plain units, and low intrusion hill units. The rock units in the study area are divided into three rock units from young to old: alluvium units, granite rock units, and alternating sandstone and clay units. Geoelectrical measurements of induced polarization were carried out on eight tracks located in 2 blocks of the study area, namely five tracks in the ABA block and three in the ABB block. Based on the distribution of resistivity values, the ABA05 line has the highest value, namely 33.1 Ωm to 2,398,833 Ωm. Tracks ABA01, ABA05, ABB07, and ABB08 have relatively moderate to high chargeability values. The potential for sulfide-bearing rock resources in the ABA block is estimated at 261,818 m3. If the rock density value is assumed to be 2.65 gr/cm3 or 2.65 tons/m3, then the total rock resource carrying sulfide minerals in this area is 693,818 tons. The potential for sulfide-bearing rock resources in the ABB block is estimated at 1,590,708 m3. If the rock density value is assumed to be 2.65 gr/cm3 or 2.65 tons/m3, then the total rock resource carrying sulfide minerals in this area is 4,215,376 tons. The actual rock resources taking sulfide minerals from the results of the 3D modeling of the IP and resistivity methods amount to 4,909,194 tons from an area of ​​1,296.2 Ha.
Cekungan Kuarter Antar Pegunungan di Jawa Barat Edy Sunardi,; Iyan Haryanto; Andi Agus Nur; abdurokhim; Nisa Nurul Ilmi
Jurnal Geologi dan Sumberdaya Mineral Vol. 24 No. 3 (2023): JURNAL GEOLOGI DAN SUMBERDAYA MINERAL
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v24i3.751

Abstract

Geologi suatu daerah sebagai suatu model dapat mengalami perubahan secara konstruktif (refining), sejalan dengan munculnya gagasan-gagasan baru dalam sedimentasi, stratigrafi, tektonik dan evolusi cekungan, serta vulkanisme, didukung oleh berbagai jenis data baru yang lebih banyak dan lebih akurat. Suatu kolase elemen-elemen dasar yang disusun secara lokal dan dihubungkan satu dengan yang lain menurut kaidah yang dianut akan membentuk pengertian baru. Penelitian ini merupakan hasil pengamatan geologi lapangan ditunjang dengan pekerjaan studio, khususnya dalam interpretasi struktur geologi. Klasifikasi genetik terbentuknya cekungan Kuarter, selanjutnya dibangun dan mengacu juga kepada kontrol struktur terhadap penyebaran batuan vulkanik Kuarter dan gunugapi aktif di Jawa Barat. Atas dasar analisis, pembentukan cekungan pada area studi merupakan cekungan antar pegunungan di Jawa Barat, secara umum dapat dikelompokan menjadi: Anticlinal collapse basin, Half Grabben Basin, Flexure Subsidence Basin, Pull Apart Basin dan Paleovolcano Crater Kata kunci: Jawa Barat, Pembentukan cekungan, Tektonik, volkanisme
Vertical Electrical Sounding Exploration of Groundwater in Kertajati, Majalengka, West Java, Indonesia Gumilar Utamas Nugraha; Boy Yoseph CSSSA; Andi Agus Nur; Pulung Arya Pranantya; Lina Handayani; Rachmat Fajar Lubis; Hendra Bakti
Indonesian Journal on Geoscience Vol. 8 No. 3 (2021)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.8.3.359-369

Abstract

DOI:10.17014/ijog.8.3.359-369Continuously increasing population and progressive infrastructural development in the region of Kertajati International Airport, Indonesia, emphasize the need to develop a sustainable water supply network. Airport facilities require sufficient water resources, which can be obtained from surface water and groundwater. Groundwater exploration can provide necessary information for assessing water resources. The purpose of this study is to analyze the configuration of aquifers in the studied area. A Schlumberger array was used to carry out twelve vertical electrical soundings (VES) with AB/2 electrode spacing ranging from 1.5 m to 150 m. IPI2win software was used to qualitatively interpret the VES results and it suggested the presence of three distinct lithological units interpreted as clay, alluvial sand, and a Lower Quaternary formation. In general, resistivity values in the studied area can be divided into five resistivity categories: very low resistivity with values ranging from 1 Ωm to 10 Ωm, low resistivity with values ranging from 10 Ωm to 50 Ωm, medium resistivity with values ranging from 50 Ωm to 100 Ωm, high resistivity with values ranging from 100 Ωm to 200 Ωm, and very high resistivity with values > 200 Ωm. The geo-electric interpretation revealed three geo-electric layers: topsoil (1 - 144 Ω m), sand (1 - 298 Ω m), and clay (1 - 82 Ω m). Aquifers in the studied area are lithologically composed of sand. Clay is the dominant lithology in the studied area, so the presence of aquifers in this area is very limited, and thus the supply of groundwater is also limited. The exploitation of groundwater must be limited and controlled to maintain the sustainability of groundwater in the studied area.
Tectonic Control of the Nanggulan Formation Based on Morphometric Analysis in Kulon Progo, Indonesia Winarti Winarti; Emi Sukiyah; Ildrem Syafri; Andi Agus Nur
Indonesian Journal on Geoscience Vol. 9 No. 2 (2022)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.9.2.147-157

Abstract

DOI:10.17014/ijog.9.2.147-157Outcrop of Nanggulan Formation, surrounded by Old Andesite Formation (OAF) in the eastern part of Kulon Progo Dome, is very limited. Tectonic control is interpreted as a contributing factor. Tectonic activity can be shown by a morphometric aspect. The research purpose was to calculate the valley floor - valley height ratio, stream gradient index, and drainage density of Nanggulan and Old Andesite Formations. The method used is field survey and Shuttle Radar Topography Mission analysis. The field survey focused on Clumprit, Klepu, and Kalisonggo Rivers. The total number of valley segments for the Nanggulan Formation is 223 with the valley length of 4.62 km, while OAF is 101 with a valley length of 3.55 km. SRTM analysis showed that the valley segment in OAF was 55, and valley length was 1.48 km. The valley floor - valley height ratio measured in the Nanggulan Formation is ten valleys and OAF is eight valleys. In Nanggulan Formation, the valley floor - valley height ratio value is from 1.00 to 5.46 (low uplift), whilst in OAF, the results vary: as 1.35 to 4.58 (low uplift), 0.59 (medium uplift), and 0.43 (high uplift). The stream gradient index value of the Nanggulan Formation is 460.47 (medium tectonic), while OAF is 723.84 (high tectonic). The drainage density value of the Nanggulan Formation is 10.35 km/km2 (very smooth landscape texture) and OAF is 10.35 km/km2 (somewhat smooth landscape texture). Morphometry proves that Nanggulan Formation tectonic activity is more active, causing the Nanggulan Formation to be exposed to the surface.
Co-Authors Abdurokhim Abdurokhim Abdurrokhim Almabrury Abdurrokhim ⠀ Asep Bahtiar Purnama Bakti, Hendra Boy Yoseph Cahya Sunan Sakti Syah Alam Budi Muljana Dadan Dani Wardhana Deni Wahyuadi Dwandari Ralanarko Dwandari Ralanarko Edy Sunardi, Emi Sukiyah Emy Sukiyah Gumilar Utamas Nugraha Handayani, Lina Hendra Bakti Ildrem Syafri Ildrem Syafri Ildrem Syafri Iyan Haryanto Johanes Hutabarat Karit Lumban Gaol Lina Handayani Lubis, Rachmat Fajar Muhammad Zulfikar Muhammad Zulfikar Nazar Nurdin Nisa Nurul Ilmi Noor Cahyo Dwi Aryanto Noor Cahyo Dwi Aryanto Nugraha, Gumilar Utamas Pranantya, Pulung Arya Pranowo Nugroho Pulung Arya Pranantya Rachmat Fajar Lubis Shaska Zulivandama Silti Salinita Swasty Aninda Piranti Winarti Winarti Wrahaspati Rulandoko Yuyun Yuniardi