cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
jag.ft@ugm.ac.id
Phone
+62274-513668
Journal Mail Official
jag.ft@ugm.ac.id
Editorial Address
Geological Engineering Departement Universitas Gadjah Mada Jl. Grafika No. 2 Kampus UGM Yogyakarta 55281 Phone +62-274-513668 Fax +62-274-546039
Location
Kab. sleman,
Daerah istimewa yogyakarta
INDONESIA
Journal of Applied Geology
Published by Universitas Gadjah Mada
ISSN : 25022822     EISSN : 25022822     DOI : https://doi.org/10.22146
Core Subject : Science, Social, Engineering,
Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Energy Engineering Environmental Science
Journal of Applied Geology – JAG focuses on the applied geology and geosciences with its key objective particularly emphasis on application of basic geological knowledge for addressing environmental, engineering, and geo-hazards problems. The subject covers variety of topics including geodynamics, sedimentology and stratigraphy, volcanology, engineering geology, environmental geology, hydrogeology, geo-hazard and mitigation, mineral resources, energy resources, medical geology, geo-archaeology, as well as applied geophysics and geodesy.
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Geologi
Articles 190 Documents
 15   16   17   18   19 
Radiogenic Heat Variation with Lithology in Clastic Sediments Deduced from Well Logs. An implication for Hydrocarbon Generation: ATG-Field, Niger Delta Basin Sebastian Abraham Sunu; Lucky Peter Kenda; Adetola Sunday Oniku; Osita Chukwuemeka Meludu; Abbey Chukwuemeka Patrick; Joseph Aza Ahile
Journal of Applied Geology Vol 10, No 1 (2025)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jag.91588

Abstract

This study investigates the variation of Radiogenic heat production (RHP) from four sets of wells logs namely ATG-10, ATG-11, ATG-7, and ATG-5 recorded in clastic sediments of Benin, Agbada and Akata formations in ATG field shallow offshore Niger Delta. Major lithology observed in the gamma ray log was sand, shale and shale-sand intercalations. The variations of radiogenic heat production (RHP) were computed using the total gamma ray count (GR) combined with density logs (RHOB) using the Bucker and Rybach linear methods. Heat production rates calculated was found to vary from 0.23-2.24 µWm-3 ± 0.08 for ATG 10, and 0.22-2.25 µWm-3 ± 0.08 for ATG 11, then 0.31- 2.35 µWm-3± 0.08 for ATG 7 and 0.34-2.33 µWm-3 ± 0.08 for ATG 5. The average radiogenic heat production ranges between 0.9 µWm-3- 2.29 µWm-3. It was observed that high values of radiogenic heat production were in the shale lithology of the Akata formation, and this was as a result of high concentration of radioelements (uranium, Thorium and Potassium) in the sediment. And low values of RHP in sand lithology in the Benin formation and it was as a result of low concentrations of radio elements. The magnitudes of RHP calculated in this study can produce enough heat which may have an effect on the hydrocarbon potential in the clastic sediments of the Niger Delta and also may classify thermal regime and also contributes to the maturation of Kerogen into hydrocarbon in the Niger Delta. Depth versus RHP cross plots showed heat production tends to increase with depth since the basin is underlain by Akata formation and is mainly marine shales. Where spectral gamma ray data are not available, the relationship between RHP Gamma ray and density log established in this study may be used in any part of the Niger Delta to calculate RHP.
Excavation Method of Rock Masses at the Matenggeng Dam, Indonesia Valentino Ilham Afandi; I Gde Budi Indrawan; Salahuddin Husein
Journal of Applied Geology Vol 10, No 1 (2025)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jag.103735

Abstract

This paper presents the results of engineering geological investigations and determination of rock mass excavation methods in the main dam area of Matenggeng Dam. The study was carried out through engineering geological mapping, core drill evaluation and supported by laboratory test data. Classifications of rock masses were carried out based on the Geological Strength Index (GSI) and Rock Mass Rating (RMR) to analyze the excavation method. The results showed research area consisted of lithology in the form of andesite, intercalation sandstone - gravelly sandstone unit, intercalation sandstone - siltstone unit, and alluvium deposits. However, at the main dam area consists of lithology in the form of intercalation sandstone-siltstone unit and intercalation sandstone-gravelly sandstone unit. The rock masses at the main dam excavation line have a weathering degree from moderately to complately weathered. Intact rocks have Uniaxial Compressive Strength (UCS) values ranging from 1-50 Mpa and are a category of extremly weak to moderate rocks. The rock mass of intercalation sandstone-siltstone with very poor to poor quality (GSI (0 - 58), RMR (8 - 45)), and intercalation sandstone-gravelly sandstone with poor to fair quality (GSI (20 - 59), RMR (20 - 68)). The recommended rock excavation method based on the EXCASS System is diggir, easy ripper, and hard ripper.
Unsupervised Machine Learning for Determining Exploration Areas of Valuable Elements and Potential Toxicology Elements: A Case Study of the Bowen Basin Coal, Australia Fajri Zakka Addintamma; Adzani Nareswari Amaranggana; Anindya Ayu Kusuma; Aviliana Aviliana; Mochammad Wildanun Solikh; Aulia Agus Patria; Ferian Anggara
Journal of Applied Geology Vol 10, No 1 (2025)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jag.104595

Abstract

Global coal production and demand have increased anually. In addition to its potential as an alternative source of critical elements, coal also has environmental risks through toxicology elements. Australia is the world’s second-largest producer of rare earth elements (REEs) and critical elements, making coal exploration a key focus of the country’s mining strategy. An unsupervised Machine learning algorithm was applied to 56 coal samples from three pits in Bowen Basin, e.g., Blake Central Pit, Blake West Pit, and Bowen No. 2 Pit, to correlate trace elements with the geochemical characteristics of coal, such as proximate and major oxides. Blake West Pit is enriched in Ba, Br, and Sr, which associated with inherent moisture and phosphor (P), extending SE-trend. Blake Central Pit and Blake West Pit are enriched in Hf, Mo, Ta, Th, Y, and REY, which are associated with ash and major elements such as Si, Al, Ti, and K, with a trend of potential exploration towards N-NW. However, both pits show the risk of contamination from the toxic element Zn, which is associated with volatile matter, and major elements e.g., Fe, Mg, and Mn, with a trend of distribution towards S-SW. Based on the correlation analysis and regional geology, trace element enrichment in Bowen Basin is controlled by two main factors: 1) the transgressive phase during Early-Late Permian, which enriched inherent moisture, P, Ba, Br, and Sr, and 2) volcanic activity during Early Permian, which enriched silicate minerals and elements such as Hf, Ta, Th, W, and REY. Unsupervised machine learning has proven effective for preliminary coal characterization to support further exploration.
Estimation of Strong Ground Motion at Mandalay Region, Myanmar pyi soe thein; Khaing Khaing; Kyi Kyi Lin; Subagyo Pramumijoyo; Junji Kiyono
Journal of Applied Geology Vol 10, No 1 (2025)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jag.105847

Abstract

Mandalay region lies very closed to the dextral Sagaing fault. In the historical record, several earthquakes happened in and around Mandalay region from the beginning of the year of 1400. Among them the most distinct event is the Sagaing earthquake struck on July 16, 1956. This research mainly focuses on results of microtremor survey at 143 sites and 25 data from the boreholes for determination of sediment thickness characteristics and strong ground motion analysis in Mandalay region. For the accurate prediction of earthquake ground motions, the investigation of three elements in its process, namely the source, path, and site effects, is crucial, and their accuracy and reliability should be evaluated. The subsurface profiles, predominant periods, shear wave velocity structures and information about sediment thickness or depth of engineering bed rock were evaluated based on data from boreholes, microtremor survey and laboratory results, combining with inversion program. The shear wave velocity of the top layer is Vs ≤ 190 m/s. The spectral amplitudes of the estimated strong ground motions were smaller at around 0.5 Hz and larger at around 3 Hz in Mandalay region. The peak ground acceleration becomes more than 0.8 g in some areas, which causes severe damage for buildings in high probability.
Improving Landslide Susceptibility Using Groundwater Parameter in Samigaluh and Kalibawang Subdistricts Raja Susatio; Junun Sartohadi; Guruh Samodra; Muhammad Anggri Setiawan; Wahyu Wilopo
Journal of Applied Geology Vol 10, No 1 (2025)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jag.106054

Abstract

Landslide susceptibility map is crucial in disaster risk management and it can be used for regional development plans. Landslide susceptibility map can be made by analyzing parameters that are assumed to affect landslides such as gradient slopes, geology, soil, and climate. Selection of landslide controlling parameters influences the accuracy of landslide susceptibility map. This study evaluates the effect of parameter that’s rarely used which is groundwater. The study area of this research was Kalibawang and Samigaluh Subdistricts, Kulonprogo, Special Region of Yogyakarta, Indonesia. Frequency ratio was used for the method along other parameters which is slope gradient, lithology, lineament density, land use, soil thickness. The result shows that groundwater parameter increase the accuracy by 22,29%. This study suggest that groundwater should be highly considered in landslide susceptibility mapping. In the other hand, groundwater depth mapping remains a challenge because most remote sensing method only detect shallow groundwater. Further research is necessary to develop better method for groundwater mapping using remote sensing or other indirect method.
Mechanism of Overburden Dumping by Applying SNI 7280:2022 Fanteri Aji Dharma Suparno; Agus Prastyo; Siti Aminah
Journal of Applied Geology Vol 10, No 2 (2025)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jag.107712

Abstract

The management of overburden containing Potentially Acid Forming (PAF) and NonAcid Forming (NAF) materials is essential to prevent the formation of acid mine drainage (AMD). This study aims to analyze the distribution of PAF and NAF materials based on lithological characteristics and design an overburden dumping mechanism based on SNI 7280:2022. Data were obtained from 90 borehole points in the PT X area, East Kutai. Lithology was dominated by sandstone and mudstone (PAF). The total overburden volume was 185,493,800 bcm, with 66.67% PAF and 33.33% NAF. The dump design used an encapsulation approach (1-3-7 NAF-PAF-NAF block configuration) to isolate PAF from air and water exposure. The calculated Factor of Safety (FK) using theBishop method was 1.545, indicating a stable slope.
Groundwater Identification Using the Geoelectric Method (Electrical Resistivity TomographyERT) For the Utilization of Mining Areas M. Abdul Abdul Rahman Salim; Dasapta Erwin Irawan; Imam Achmad Sadisun; Kurniawan Kurniawan; Bonanza Herlambang
Journal of Applied Geology Vol 10, No 2 (2025)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jag.112511

Abstract

Research conducted in Pomalaa Subdistrict, Kolaka Regency, Southeast Sulawesi, aimed to identify the potential and characteristics of groundwater in an area with complex geological conditions, dominated by ultramafic and sedimentary rocks. To achieve this objective, a multidisciplinary approach was used, including geological and hydrogeological mapping and direct geoelectric testing in the field. One of the main methods used in this study was a geophysical technique called Electrical Resistivity Tomography (ERT), which is capable of producing two-dimensional subsurface images based on variations in the electrical resistivity of soil and rock. The analysis results show that ultramafic rocks in this region have the potential to be free aquifers, with moderate to high hydraulic conductivity values, making them potentially usable as a source of clean water for the domestic needs of the local community. Meanwhile, the southwestern zone, which is composed of sedimentary rocks, shows the presence of a confined aquifer with high permeability and a relatively low water table, making it a more accessible source of groundwater. The integration of all geological, hydrogeological, and geophysical data provides a comprehensive picture of the distribution and quality of groundwater in the Pomalaa region. These findings provide a strong scientific basis to support strategies for the conservation and sustainable use of groundwater resources, as well as to make
Zoning of Groundwater Vulnerability to Seawater Intrusion Using Modified GALDIT Method in the Coastal Aquifer of Kendari Bay, Southeast Sulawesi Fandy Irvansyah; Doni Prakasa Eka Putra; Wahyu Wilopo
Journal of Applied Geology Vol 10, No 2 (2025)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jag.112764

Abstract

Industrial expansion and the increasing use of groundwater in Kendari City have heightened the risk of water table decline and seawater intrusion, particularly in areas adjacent to Kendari Bay. This study aims to assess and map the vulnerability to seawater intrusion in the Kendari Bay region using a modified GALDIT method, supported by field observations and hydrogeochemical analyses for validation. The results indicate that zones with very low to low vulnerability are predominantly located in the western part of the study area, which is characterized by higher topographic slopes. In contrast, areas with very high to high vulnerability are concentrated along the coastal zone, where elevations are relatively low and proximity to the shoreline increases exposure to seawater intrusion. Validation through field and chemical data confirmed the reliability of the vulnerability zoning, as wells situated in high-vulnerability zones consistently exhibited seawater intrusion signatures, whereas those in low-vulnerability zones showed typical freshwater characteristics.
Landslide Susceptibility Mapping Using Weight of Evidence Method in Tieng Village and Surrounding Areas, Kejajar District, Wonosobo Regency, Central Java Province, Indonesia Fenora Aninditya Pramesthi; Wahyu Wilopo; Agus Hendratno; Hendy Setiawan; I Gde Budi indrawan; Doni Prakasa Eka putra; Wahyu Sasongko
Journal of Applied Geology Vol 10, No 2 (2025)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jag.117696

Abstract

Tieng village and its surrounding areas in Kejajar District, Wonosobo Regency, are identified as regions with a relatively high risk of landslide hazards. This research aims to examine the geological conditions influencing landslide occurrences and to develop a landslide susceptibility zonation map within the study area. Methods of landslide mapping using statistical method weight of evidence (WoE), with parameters including slope, lithology and grade of weathering, distance from lineaments, distance from rivers, and land use. All parameters were classified into several class and spatially processed using ArcGIS software. Then, these maps were overlaid and analyzed based on contrast weight values to produce the final landslide susceptibility zonation map. The resulting susceptibility map categorized into four zones: very low, low, medium, and high landslide susceptibility. The very low landslide susceptibility zone is generally found in the eastern part of the area, the low susceptibility zone is in the western and eastern parts, the medium susceptibility zone occurs in the eastern and southern parts, while the high susceptibility zone is distributed in the southeastern, central, and eastern parts of the study area. The parameters that have the most influence on landslide susceptibility in the research area based on their level of influence from strongest to weakest are land use, distance from lineament, distance from river, lithology and grade of weathering and slope. The accuracy of the landslide susceptibility map was assessed using the Success Rate Curve (SRC) and Prediction Rate Curve (PRC) validation. The Area Under Curve (AUC) values obtained from the SRC and PRC analyses were 0.765 for SRC and 0.741 for PRC, respectively, indicating a good level of model performance.
Characterization and Nitrate Reduction Activity of Bacteria Isolates from Groundwater in Yogyakarta as a Potential for In-Situ Bioremediation Abigail Yemima; Endah Retnaningrum
Journal of Applied Geology Vol 10, No 2 (2025)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jag.118499

Abstract

Groundwater pollution is common in densely populated areas due to the high discharge of domestic as well as agricultural waste. As a result, nitrate is one of the pollutants that is commonly found within the affected groundwater system. Yogyakarta is especially vulnerable to nitrate pollution due to the co-occurrence of rapid urban expansion and agricultural activities. High nitrate concentration in groundwater leads to many adverse effects on the environment, as well as human health. Therefore, this research was conducted to measure the capacity of indigenous aerobic nitrate-reducing bacteria found within the groundwater in Yogyakarta as a potential agent for in-situ bioremediation. A total of 19 indigenous bacteria were isolated from groundwater samples in Yogyakarta and were tested for their nitrate reduction activity. Two of the hight efficient isolates in reducing nitrate aerobically were then measured for their nitrate reduction activity every 24 hours within a 3-day incubation period. The phenotypes of the two bacteria isolates were characterized through the observation of cell morphology, colony morphology, and biochemical tests. Out of the two bacteria isolates, bacteria isolate 1 with similar characteristics to Pseudomonas sp was the most efficient in reducing nitrate, with 95.38% of total nitrate removed and a nitrate reduction activity of 40.67 mgL−1h.

Page 19 of 19 | Total Record : 190

 15   16   17   18   19 

Filter by Year

2009 2025


Reset
Filter By Issues
All Issue Vol 10, No 2 (2025) Vol 10, No 1 (2025) Vol 9, No 2 (2024) Vol 9, No 1 (2024) Vol 8, No 2 (2023) Vol 8, No 1 (2023) Vol 7, No 2 (2022) Vol 7, No 1 (2022) Vol 6, No 2 (2021) Vol 6, No 1 (2021) Vol 5, No 2 (2020) Vol 5, No 1 (2020) Vol 4, No 2 (2019) Vol 4, No 1 (2019) Vol 3, No 2 (2018) Vol 3, No 1 (2018) Vol 2, No 2 (2017) Vol 2, No 1 (2017) Vol 1, No 2 (2016) Vol 1, No 1 (2016) Vol 7, No 2 (2015) Vol 7, No 1 (2015) Vol 6, No 2 (2014) Vol 6, No 1 (2014) Vol 5, No 2 (2013) Vol 5, No 1 (2013) Vol 4, No 2 (2012) Vol 4, No 1 (2012) Vol 3, No 2 (2011) Vol 3, No 1 (2011) Vol 2, No 2 (2010) Vol 2, No 1 (2010) Vol 1, No 2 (2009) Vol 1, No 1 (2009) More Issue