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All Journal Bulletin of Scientific Contribution : Geology Journal of Geoscience, Engineering, Environment, and Technology Dewa Ruci : Jurnal Pengkajian dan Penciptaan Seni Gelar : Jurnal Seni Budaya Journal of Geosciences and Applied Geology JIM Sendratasik

Ismawan Ismawan, Ismawan

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Author-ID : 604874

Arts Humanities Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Education Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Physics Social Sciences Other

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Characterization of Basement Fracture Reservoir In Field âXâ, South Sumatera Basin, Based On The Analysis of Core And FMI Log Riskha, Hartawi; Syafri, Ildrem; Ismawan, Ismawan; Natasia, Nanda
Journal of Geoscience, Engineering, Environment, and Technology Vol 2 No 2 (2017): JGEET Vol 02 No 02 : June (2017)
Publisher : UIR PRESS

Basement reservoir is a reservoir that is located in the basement rock, comprised of either igneous rock or metamorphic rock that has secondary porosity, resulting in its capability to store oil and gas. The research was conducted at field X that is located at South Sumatra basin and it is a part of Jambi Sub-Basin. The study was focused on discussing hydrocarbon potential in Fields X, particularly at the basement metamorphic rock. The study was conducted at two wells in the field. The secondary porosity system of the basement is fracture porosity. Fracture analysis as secondary porosity system was performed on two wells, HA-1 and HA-2, by using FMI log interpretation. Based on the analysis of fracture on HA-1 well, the trend of fracture system is Northeast - Southwest (NE-SW) with a fracture porosity of 1.49%. On a different note, the trend of fracture system on HA-2 wells is East Northeast - West Southwest (ENE-WSW) with a fracture porosity of 0.888%. The effect of rock properties itself has little influence on the number of fractures as opposed to the effect of surrounding tectonic forces. The fractures are controlled by geological structures following Jambi pattern that has an orientation of Northeast - Southwest (NE-SW). Although the fracture porosity is relatively small, it is enough to storing hydrocarbons in economical quantity.

Structure and Tectonic Reconstruction of Bayah Complex Area, Banten Ahnaf, Jemi Saputra; Patonah, Aton; Permana, Haryadi; Ismawan, Ismawan
Journal of Geoscience, Engineering, Environment, and Technology Vol 3 No 2 (2018): JGEET Vol 03 No 02 : June (2018)
Publisher : UIR PRESS

The research aimed to reconstruct the geological structures and tectonics of the Bayah complex area. The structures found that grouped into regional structural patterns used to determine the ages and the events that responsible to its formation. The methods used in this research include field and studio method. Field method carried out to map the outcrops and record geological structures data using geological compass, GPS, tape measurement, and geological hammer, while studio method performed to process and analyze data using software such as Win Tensor, Dips, MapInfo Professional 10.5 and CorelDraw X4. The geological structure of the Bayah has varying patterns and ages. The fracture patterns show N-S and E-W direction which is belong to Sundanese and Java Pattern formed in range of the Early Eocene to Pliocene. While the faults that have direction of SW-NE and E-W are classified into Meratus and Java Pattern. However, metamorphic rock foliations show NW-SE and N-S direction that belonging to the Pre-Tertiary Sumatra Pattern. The three faults of this research are estimated to be formed by the effect of orogenesis that occurring in different events and ages. JSA-014 fault is predicted to form due to orogeny I or orogeny II in the Early Oligocene - Middle Miocene, this fault classified as the 2nd order right lateral wrench fault. JSA-034 fault is formed by orogeny I in Early Oligocene - Middle Miocene, this fault is also classified as the 2nd order right lateral wrench fault. While JSA-080 fault has relatively young age that formed due to orogeny III in the Middle Miocene - Pliocene and belonging to the 3rd order left lateral wrench fault.

Visual ethnography of the Aneuk Jamee bridal chamber as an effort to preserve cultural products in Tapak Tuan, Aceh Province Lindawati, Lindawati; Bakhir , Norfarizah Mohd; Ismawan, Ismawan; Ramdiana , Ramdiana
Dewa Ruci: Jurnal Pengkajian dan Penciptaan Seni Vol. 19 No. 1 (2024)
Publisher : Pascasarjana Institut Seni Indonesia Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33153/dewaruci.v19i1.5504

This article investigates the bridal chamber aisle of the Aneuk Jamee tribe in Tapaktuan District which is rarely used by the community. This aisle is one of the visual cultural products that need to be preserved. The research uses a visual ethnography approach. Visual ethnography provides a new way of revealing, describing, and analyzing cultural products and human experiences. Data were obtained through interviews, observation, and documentation. Data analysis was carried out by visual ethnography analysis. The results of the study found that, bridal room aisles are rarely used by the Aneuk Jamee tribe due to the times where many aisle businesses offer more modern bridal room decorations and the lack of government role in maintaining the use of bridal room aisles. The visual form of the bridal room aisle has its own characteristics and meaning. With this article, it is hoped that people can find out the parts and meanings contained in the bridal aisle of the Aneuk Jamee tribe. These meanings become the basis for contemplating actions to maintain the continuity of tradition in the face of growing innovation.

FAULT SEGMENTATION OF SOUTHERN SUMATRA (SIANOK SEGMENT-SEMANGKO SEGMENT) BASED ON ACTIVE FAULT MAPPING THROUGH DIGITAL ELEVATION MODEL (DEM) AND SEISMICITY FALAH, MUHAMMAD FAZRUL; Mukti, Muhammad Ma'ruf; Ismawan, Ismawan; Helmi, Faisal
Journal of Geological Sciences and Applied Geology Vol 7, No 2 (2023): Journal of Geological Sciences and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v7i2.50380

Subduction with oblique dimensions causes the formation of structures in the Sumatra area, one of which is the formation of the Sumatran Fault System with dextral fault movements. Strike-slip Fault are segmented in varying geometries and sizes. The Sumatran Fault has been extensively segmented through geometric and structural analysis on the surface and seismic analysis using seismic clusters. This research was conducted to update fault segmentation using surface structure analysis and earthquake data distribution. Surface mapping was carried out through DEM imagery and association with earthquakes and their focal mechanisms, as well as geological factors such as lithology and volcanoes related to the Sumatra Fault. There were 14 segments based on geological and structural identification such as step over, bend, and discontinuity (gap). All the active fault in the region can produce >Mw 6.6 earthquake.

Geotechnical Evaluation of Landslide in Nanggerang Village Tan, Yohanes; Zakaria, Zufialdi; Ismawan, Ismawan; Sophian, Irvan; khoirullah, Nur
Journal of Geological Sciences and Applied Geology Vol 8, No 1 (2024): Journal of Geological sciences and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v8i1.56822

Landslides are significant geological events that can cause extensive damage to infrastructure, disrupt communities, and pose serious safety hazards. Understanding the mechanisms behind slope failures is crucial for effective risk mitigation and the development of engineering solutions to improve slope stability. According to data from the National Disaster Management Agency (BNPB), Indonesia experienced 83 landslide events from January to February 2024. A notable landslide occurred in Nanggerang Village, Sukasari Sub-district, Sumedang Regency, West Java Province, on February 3, 2024. This landslide happened in a terraced rice field area following heavy rainfall earlier in the day. This study focuses on evaluating the failed slope to understand its condition just before failure and the material properties that influence the landslide event. The research methodology includes field data collection, soil testing, and slope stability analysis using the Limit Equilibrium Method (LEM) with a probabilistic approach via Slide 2 software. The analysis revealed that the failed slope had an average safety factor (FS) of 0.968 and a landslide probability of 58.897%. Sensitivity analysis showed that the cohesion parameter in the soil layer (CWZ) significantly impacts the safety factor of the slope. The study concludes that the reduction in soil cohesion and internal friction angle due to excessive moisture was the primary cause of the landslide, and the cohesion parameter of the soil layer is the most sensitive factor affecting slope stability.

Morphometry And Morphotectonic Characteristics Of The Cisokan Watershed Segments Cilengkong And Cisukarama, West Java, Indonesia Saprana, Rifqi Dwi; Sophian, Irvan; Khoirullah, Nur; Ismawan, Ismawan
Journal of Geological Sciences and Applied Geology Vol 5, No 1 (2021): Journal of Geological Science and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v5i1.34667

West Java has a complex geological structure characteristic due to subduction events in the south of Java Island. The control of the geological structure affects the formation of the surrounding landscape, so analysis is needed to assess its activities. The research was conducted in the Cisokan sub-watershed in the Cilengkong and Cisukarama segments in Cianjur and West Bandung districts, West Java. The purpose of this study was to determine the morphometric and morphotectonic characteristics of the Cisokan watershed in the Cilengkong and Cisukarama segments. The method used is studio analysis using applications to process digital image data into morphometric and morphotectonic analysis parameters. The parameters analyzed were the bifurcation ratio, drainage density, basin shape index, drainage basin asymmetry, and mountain front sinuosity. The results obtained are that the Cilengkong segment has an Rb value of 4 - 4.5 with a medium flow density, a BS value of 1.80, an AF value of 25.8, and an SMF value of 1.19 - 2.78. The Cisukarama 1 segment has an Rb value of 4 - 4.25, a BS value of 1.62, an AF value of 57.14, and an SMF value of 1.66 - 3.41. The Cisukarama 2 segment has a value of Rb 3 - 4.25, a BS value of 1.59, an AF value of 42.5, and an SMF value of 1.34 and 2.13. The conclusion obtained is that tectonic activity as a landscape-forming factor in the study area decreases or even stops.

Tectonic Activity Response Based on Geomorphic Index In Pasirmunjul, Sukatani, Purwakarta Regency, West Java Pradifta, Alif; Ismawan, Ismawan; Ramadian, Aldrin
Journal of Geological Sciences and Applied Geology Vol 6, No 1 (2022): Journal of Geological Science and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v6i1.45227

The study area administratively located in Sukatani sub-district, Purwakarta Regency, West Java. This study is aim to determine the level of tectonic activity in the study area using a quantitative geomorphological approach. The geomorphic indices that used in this research are the Mountain Front Sinusity (SMF), Ratio of valley floor width to valley height (Vf), Hipsometric Integral (HI), Drainage Basin Shape (BS), and Asymmetry Factor (AF). Then, these parameters of geomorphic index, are included in the calculation of the Relative Tectonic Activity Index (IATR) which is show the distribution of tectonic activity levels in the study area. The results of the analysis Relative Tectonic Activity Index (IATR) show that the study area is divided into 3 classes of tectonic activity, namely class 2 (high), class 3 (medium), and class 4 (low). Class 2 occupies about 19.5% of the study area with an area of 7.6 km2 which is spread over the western part of the study area. Class 3 occupies about 79.8% of the study area with an area of 31.4 km2 which is spread dominantly in the study area. While class 4 (low), which occupies about 0.7% of the study area with an area of 0.28 km2 which is spread in the northern part of the research area. In general, the study area has a fairly balanced between level of tectonic activity with an erosion activity, but in the western part of the study area tended to be more dominated with tectonic activity than the erosion activity, which was indicated due to the influence of the structure in the area and caused a catastrophic ground motion in surrounding area.

SETTLEMENT IN THE NOTHERN PART OF BEKASI REGENCY, WEST JAVA PROVINCE, BASED ON CONE PENETRATION TEST DATA Jatsiah, Siti Nadia; Ismawan, Ismawan; Khoirullah, Nur; Pramudyo, Tulus
Journal of Geological Sciences and Applied Geology Vol 7, No 2 (2023): Journal of Geological Sciences and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v7i2.49996

In the nothern part of Bekasi Regency, the soil layers are dominated with alluvial deposit, especially clay and silt deposit. It makes the potential of the settlement in this area is getting higher. In this research, Cone Penetration Test (CPT) have been done to determine the soil layers from the surface till the 20 meters depth and to identify other soil properties, such as unit weight, compression index, swelling index, void ratio, etc. This research aims to analyze the total settlement in the northern part of Bekasi Regency based on CPT data. The total settlement is calculated by using the theory of One-Dimensional Primary Consolidation based on CPT data. The research area shows that the highest result of total settlement calculation is in the northern part of research area which directly adjacent to the Java Sea. It can be happened because the clay layers in northern part is way thicker than the other area.

PENGARUH SESAR CITANDUY TERHADAP POLA JURUS LAPISAN BATUAN DI DAERAH BANTARUJEG-MAJALENGKA, PROVINSI JAWA BARAT Ismawan, Ismawan; Haryanto, Iyan
Bulletin of Scientific Contribution Vol 14, No 2 (2016): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Fold pattern of the Tertiary sedimentary rock in Majalengka represents east-west orientation as a partof Jawa fault thrust belts. In the Bantarujeg area, the orientation of those folds are slightly different tothe major east-west orientations due to different shear strength that controls this region as a product ofheterogenity block movement in orientation and speed. It was causing rock mass break laterally andproduce tear faults and/or strike-slip faults. Along the faults, strain direction rotated and bend thestratification of sedimentary rocks along the fault. However, pattern of stratification is depend on thetime development of fault system since the stratifications are not influenced by faults.Step of works of this research was starting by interpret structure and lineament from DEM data, thuscombined by field work data that consists of strike and dip of stratification, lithology and stratigraphysuccession.Keywords : rotation, copel, strain system, anjakan fold, strike pattern, stereographic projection Pola struktur lipatan pada batuan sedimen Tersier di daerah Majalengka, merupakan bagian dari polastruktur lipatan anjakan Jawa yang secara regional berarah barat-timur. Di daerah Bantarujeg, sebagiandari pola struktur ini membusur karena adanya pengaruh tegasan kopel. Tegasan kopel terjadi ketikamasa batuan yang bergerak memiliki kecepatan yang berbeda di setiap segmennya. Peristiwa inimenyebabkan masa batuan robek secara lateral yang akhirnya membentuk tear fault atau sesarmendatar lokal. Selama berlangsungnya peristiwa ini, arah tegasan berotasi dan menyebabkan lapisanbatuan melengkung secara lateral di sekitar zona sesarnya. Tidak semua sesar mendatar merubah polajurus lapisan batuan, hal ini tergantung kepada waktu pembentukannya, yaitu apakah lipatan seret initerbentuk bersamaan dengan pembentukan struktur lipatan anjakan ataukah terjadi sesudahnya.Metoda penelitian dilakukan dengan menganalisis kelurusan struktur melalui DEM, dilanjutkan denganmengukur kedudukan strike dan dip lapisan di lapangan. Selanjutnya dengan mengkompilasi aspekmorfologi dan stratigrafinya, akan diketahui sejauh mana kontrol tear fault merubah pola jurus di daerahini. Pengolahan data struktur dilakukan dengan analisis dem, rekontruksi pola jurus dan proyeksistereografi.Kata kunci : rotasi, kopel, sistem tegasan, lipatan anjakan, pola jurus, proyeksi sterografi.

Characteristic of volcanic deposits in the southern part of Gunung Karang, Pandeglang - West Java Abdurrokhim, Abdurrokhim; Ismawan, Ismawan
Bulletin of Scientific Contribution: GEOLOGY Vol 14, No 3 (2016): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/bsc geology.v14i3.11055

In the southern part slope of Gunung Karang in Pandeglang, there are many well-outcrops of volcanic materials that developed during Quaternary. The deposits represent various lithofacies both vertically and laterally.In general the lithologic characteristics that are found in the study area can be grouped into three units, (1). Tertiary sedimentary rock, which is consists of tuffaceous mudstones interbedded with fine-grained tuffaceous sandstone and siltstone, (2) primary volcanic product consist of andesite lava flow, volcanic breccia/agglomerate, and pyroclastic rocks (ash tuff, lapilli tuff, bomb/block, and lapilli tuff breccia, and (3) secondary volcanic products, which is consisting of laharic breccia and coarse-grained thick-bedded sandstone.In general the deposits become younger to the top of topography (Gunung Karang), but locally the deposits are most likely overlapping each other’s.Keywords: Volcanic deposits, Gunung Karang

Co-Authors Abdillah Abdillah Abdurrokhim ⠀ Ahmad Syai Ahnaf, Jemi Saputra Almunadia, Almunadia Am, Zakiati Amalia, Lula Arda, Nantuhateni Arifkan, Arizki Arismunandar, Reza Arrayyan, Ahyar Ashilla, Poetri Asmaul Husna Aton Patonah, Aton Aulia Febrila, Ashya Bakhir , Norfarizah Mohd Cut Zuriana Dahlia, Meli Edi, Muhammad Elviana, Latifah Fadlurrahman, Al Faisal Helmi FALAH, MUHAMMAD FAZRUL Fhata, Mizanul Fitri Anggriani Fitri, Aida Fitria Fitria Fitriah Fitriah Hamdani Hamdani Hanifa, Nadila Hartawi Riskha, Hartawi Haryadi Permana Hendarmawan Hendarmawan, Hendarmawan Hilza, Widya Hulwan, Hulwan Hutapea, Boison Ildrem Syafri Indriana, Radilla Irfandi, Jalil Irvan Sophian, Irvan Iyan Haryanto, Iyan Jatiana, Cut Afrina Jatsiah, Siti Nadia Johanes Hutabarat Khoirullah, Nur Liana, Rizka Afriza Lihadi, Riva Lindawati Lindawati Maghfirah, Ridha Maghfirah, Ulen MASTURA, FADHILA Miranda, Intan Mirza Fahmi Mukti, Muhammad Ma'ruf Muslimah, Rina Mustaqilla, Syarifah Na:am, Muh Fakhrihun Nadia, Ayi Sri Nanda Natasia Nurbiyanti, Nurbiyanti Nurlaili Nurlaili Nurmuttaqin, T.Ikkin Palawi, Ari Pradifta, Alif Pramudyo, Tulus Puspita, Nelva Putri Salwa, Indah Shasqiah Rahmi, Mauliza Rahmina, Ayu Ramadian, Aldrin Ramdiana , Ramdiana Ramdiana, Ramdiana Rida Safuan Selian Safda, Deslima Safitri, Devira Samsuri Samsuri Saprana, Rifqi Dwi Siti Sarah, Siti Supadmi, Tri Susana Susana Syafriruddin, Syafriruddin Syahputra, Muhammad Naufal Syarif, Cut Anzar Tengku Hartati Ullya, Nailul Ulya, Raysa Hiyal Vijaya Isnaniawardhani Viliani, Devi Wahyuni, Laina Wulandari, Widyana Yohanes Tan, Yohanes Zakiyanti, Zakiyanti Zufialdi Zakaria, Zufialdi

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