Journal of Geology Mengkarang
Aim : The Journal of Geology Mengkarang (JoGM) is welcomes original research articles and relevant scientific review articles that address geological processes, Earth materials, geological resources, environmental challenges, and the application of geological sciences to sustainable development. The journal encourages scientific innovation and interdisciplinary approaches that support responsible natural resource management, environmental protection, and disaster risk reduction. Scope : 1. Dynamic Geology and Tectonics – Geological processes, structural geology, stratigraphy, tectonic evolution, and the geological history of the Earth; 2. Geodiversity and Geological Heritage – Geological landscapes, landforms, geological heritage assessment, geoconservation, and the sustainable management of geodiversity; 3. Engineering Geology – Geological investigations for infrastructure and construction, rock and soil characterization, slope stability, and geological conditions affecting engineering projects; 4. Environmental Geology and Hydrogeology – Geological aspects of environmental management, groundwater systems, groundwater contamination, seawater intrusion, water resources, and geological impacts of human activities; 5. Volcanology and Disaster Mitigation – Volcanic processes, geological hazards, hazard assessment, disaster risk reduction, and geological approaches to community resilience; 6. Geotourism – Geological tourism, geopark development, geosite assessment, interpretation of geological heritage, and sustainable geotourism management; 7. Energy, Mineral, and Coal Resources – Geological exploration, resource characterization, mineralization, coal geology, energy resources, and related geological assessments; 8. Exploration Geophysics – Application of geophysical methods to geological investigation, subsurface characterization, resource exploration, and environmental studies; 9. Geodesy – Geodetic measurements, deformation monitoring, spatial positioning, and applications supporting geological and geospatial investigations; 10. Geographic Information Systems (GIS) and Geospatial Applications – Geological mapping, remote sensing, spatial analysis, digital terrain modeling, and geospatial methods for geological and environmental assessment.
Articles
10 Documents
<![CDATA[Groundwater Level and pH Assessment for Drinking Water Suitability in Mulyaguna Village, Gelam Bay District ]]>
<![CDATA[Luliana, Luliana]]>;
<![CDATA[Yuwana, Yona]]>;
<![CDATA[Said, Yulia Morsa]]>;
<![CDATA[Zuhdi, Mohammad]]>
<![CDATA[ Journal of Geology Mengkarang Vol. 1 No. 1 (2026): Journal of Geology Mengkarang ]]>
Publisher : <![CDATA[Department of Geological Engineering, Faculty Science and Technology, Universitas Jambi ]]>
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DOI: 10.22437/jogm.v1i1.53559
<![CDATA[Mulyaguna is a lowland area with sloping relief where most of the area is peatland. People in this area use dug wells to get clean water which is used for their daily consumption needs. Along with the progress of the times the need for clean water in this area also increases while the available water is limited with water quality on peatlands that are not too good. Water that is good for consumption is one that has a pH of 7, neither acidic nor alkaline. Most of the wells made by the community are murky, brownish in color and smelly. This raises the question of whether the water in these wells is suitable for consumption or not and the condition of the water table. By measuring the groundwater level and taking water samples to measure the pH of the water, it is hoped that the well water consumed is feasible or not and the direction of water flow to determine the availability of water in this area. Sampling used a random sampling method where the pH of the water at the 12 research locations that had been measured ranged from 5.5-6 which indicates that the water is acidic and unfit for consumption and has a shallow to The groundwater level (depth to groundwater) ranges from 26.2 to 44.8 m, where The direction of groundwater flow is toward the north–northwest.]]>
<![CDATA[Potential of Lithium Economic Resources in Geothermal Manifestations Based on Geochemical Data (Case Study of Dieng WKP, Central Java Province) ]]>
<![CDATA[Pratama, Muhamad Deva]]>;
<![CDATA[Nugroho , Dwiandara]]>
<![CDATA[ Journal of Geology Mengkarang Vol. 1 No. 1 (2026): Journal of Geology Mengkarang ]]>
Publisher : <![CDATA[Department of Geological Engineering, Faculty Science and Technology, Universitas Jambi ]]>
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DOI: 10.22437/jogm.v1i1.53569
<![CDATA[Lithium is one of the elements used as raw material for batteries in electric cars. In this case, lithium is very useful for production, considering that the presence of lithium in geothermal fields and the extraction process also minimizes the risk of air pollution. Based on PSDMBP research in 2019, it is known that lithium from geothermal wells in Dieng reached 99 mg/L. The Dieng geothermal field has the highest lithium content in Indonesia. This is because the geothermal system is water-dominated. During the process of producing geothermal fluid into electrical energy at PLTP, the lithium increases due to air circulation which tends to be closed in the Dieng geothermal system. The method used in this research is a remote sensing method in the form of a map of the distribution of manifestation locations which can show the potential presence of the element lithium based on geochemical and geothermometer data from several locations of the Dieng project area these data which is then processed statistically to determine the potential of the lithium element from geothermal fluid types. Based on the results of geochemical data from several spring points at the Dieng Project Area hot spring, the accumulated lithium levels from 9 samples were obtained at 1.11 mg/L. It can be seen that there is potential for lithium resources that have economic value. This is directly proportional to research conducted by PSDMBP that there is potential for lithium in this area. From this, the potential economic resource for lithium obtained at 9 samples is IDR. 14,947,732, with an air formation flow rate of 70.00 kg/hour and a market selling price of US$ 17,000/ton. This makes the lithium element in this location a potential resource with economic value and can maximize added value apart from electrical energy produced by geothermal energy.]]>
<![CDATA[Analysis of spring discharge quantity in a fractured karst aquifer of the Klapanunggal Formation, Ligarmukti Village, Bogor Regency, West Java ]]>
<![CDATA[Zhafirah, Auliya]]>;
<![CDATA[Haurissa, Miranda Nella]]>;
<![CDATA[Terloit, Inggrit Mirascela]]>
<![CDATA[ Journal of Geology Mengkarang Vol. 1 No. 1 (2026): Journal of Geology Mengkarang ]]>
Publisher : <![CDATA[Department of Geological Engineering, Faculty Science and Technology, Universitas Jambi ]]>
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DOI: 10.22437/jogm.v1i1.53583
<![CDATA[Indonesia has karst areas spread across Sumatra, Java, Sulawesi, Nusa Tenggara, Maluku, and West Irian. On Java Island, there is one of the main karst areas, namely the Klapanunggal Formation in Ligarmukti Village which is our research area. Karst areas are able to store and drain water (aquifer zones) due to the dissolution process in carbonate rocks that have the potential to be a source of spring water. There are several karst media aquifer springs in the study area, one of which is Sodong Spring which drains water through fracture media. The existence of Sodong Springs can meet the raw needs of the surrounding community and become a source of income from the tourism sector. In connection with this, this study was conducted to test the quantity of discharge in Sodong Spring which can always meet the needs of the community until now even in dry conditions. The conduct of this research aims to develop the use of Sodong Springs which supports the lives of the surrounding community. In this case, the community will more effectively utilize the source of Sodong Spring. The method to be carried out in this study is a quantitative method based on hydrogeological observations. Sodong spring water will be able to be developed for utilization because of the very high discharge. The results of this research will later become an indicator of the development of water use in the Ligarmukti Village area that can be used sustainably.]]>
<![CDATA[Determination of Slope Stability Safety Factor based on the Slope Mass Rating (SMR) Method and Linearity Analysis of Discontinuity Conditions and Orientations using Linear Regression Machine Learning: a Case Study of the Breksi Cliff Area, Yogyakarta ]]>
<![CDATA[Adiningrat, Maulana Putra]]>;
<![CDATA[Marpaung, Naspuria Gita]]>;
<![CDATA[Chang, Hannah Roselynne]]>
<![CDATA[ Journal of Geology Mengkarang Vol. 1 No. 1 (2026): Journal of Geology Mengkarang ]]>
Publisher : <![CDATA[Department of Geological Engineering, Faculty Science and Technology, Universitas Jambi ]]>
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DOI: 10.22437/jogm.v1i1.53586
<![CDATA[The Tebing Breksi area is a geotourism of ancient volcanic remains in the Southern Mountains in the Semilir Formation that existed in the Oligocene-Miocene, but not many have discussed the rock mechanic’s side. The observation is conducted in Sambirejo, Prambanan, Sleman Regency, in the Special Region of Yogyakarta. Slope stability study by assessing slope kinematics and rock mass classification using the SMR Method, which assumes that the slope is in a state of failure, and this method evaluates whether the forces and moments acting on each slice are in equilibrium. The data used are slope geometry data, lithology description, and Rock Mass Rating classification data taken along the scanline. Kinematic analysis of the slope is obtained based on the stereographic projection results using Dips and rock slope quality and stability analysis based on RMR and SMR parameters. The RQD value of the slope is 99.94% in the excellent category, and the RMR value obtained is 77 in the good category. The kinematic analysis shows the mass movement that will occur as a toppling avalanche orientated at 46.05%, so the SMR value is 73 in the good category. The heatmap and linear regression analysis between conditions and discontinuity orientations with respect to RMR-SMR values indicate a varied linear relationship, with some variables showing positive correlation and others showing negative correlation. From these results, the existing rock slope has greater than 1 safety factor value, which states that the slope is included in a stable category or rarely has the potential for landslides.]]>
<![CDATA[Analysis Diagenesis and Porosity Values of Carbonate Rocks of the Wonosari Formation in Krakitan Village, Bayat ]]>
<![CDATA[Retongga, Nofrohu]]>;
<![CDATA[Siregar , Yusmansyah]]>
<![CDATA[ Journal of Geology Mengkarang Vol. 1 No. 1 (2026): Journal of Geology Mengkarang ]]>
Publisher : <![CDATA[Department of Geological Engineering, Faculty Science and Technology, Universitas Jambi ]]>
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DOI: 10.22437/jogm.v1i1.53589
<![CDATA[Diagenesis is a process that are common in sedimentary rocks especially in carbonates. The process may cause an increase or decrease in the porosity of rocks depending on their types. The types of diagenesis varies, depends on the environment of where they happened. This variation of the environment will affecting the type of the diagenesis that will affecting the pore types and certain diagenesis characteristics of the rocks. The purpose of this research is to understand the type and the role of diagenesis to the porosity of rocks from Wonosari Formation. The study site is located at 458119 South, 9143867 West, at the northern part of Jiwo Barat hills in Bayat, Central Java. We implement field investigation methods by conducting a measured stratigraphy of the rock layers, describe the rock layers in hand specimen, and also laboratory analysis including petrographic analysis to estimate the porosity value of the samples. In general, samples taken at Wonosari Formation of Jiwo Barat experienced intensive leaching diagenesis processes and calcite cementation. The type of porosity observed in the samples are channel and vuggy. The porosity value is increase in the samples with leaching diagenesis and decrease in the samples with cementation diagenesis.]]>
<![CDATA[GEOLOGY AND ANALYSIS OF COAL DEPOSITIONAL ENVIRONMENTS AND THEIR INFLUENCE ON COAL QUALITY AT PT DEVANADI KARUNIA CAHAYA, BATANG HARI, JAMBI PROVINCE ]]>
<![CDATA[Manurung, Ribka Sintia]]>;
<![CDATA[Ritonga, D.M. Magdalena]]>;
<![CDATA[Marlinda, Lenny]]>
<![CDATA[ Journal of Geology Mengkarang Vol. 1 No. 2 (2026): Journal of Geology Mengkarang ]]>
Publisher : <![CDATA[Department of Geological Engineering, Faculty Science and Technology, Universitas Jambi ]]>
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DOI: 10.22437/jogm.v1i2.57835
<![CDATA[This study aims to analyze the geological conditions, coal depositional environments, and their influence on coal quality within the mining concession area (IUP) of PT Devanadi Karunia Cahaya in Batang Hari Regency, Jambi Province. The study area is located in a coal-producing region of Jambi Province characterized by diverse geological conditions and depositional environments, which influence coal quality. The research methods employed include geomorphological and stratigraphic analysis; lithofacies analysis based on the Horne (1978) classification; maceral analysis using Tissue Preservation Index–Gelification Index (TPI–GI) and Ground Water Index–Vegetation Index (GWI–VI) diagrams (Diessel, 1986), and proximate and calorific value analyses to determine coal quality. The results indicate that the study area's geomorphology comprises several morphological forms: moderately undulating plains, denudational lowlands, mine slopes, water catchment ponds (sumps), and mine openings. The stratigraphy consists of claystone and sandstone units of the Muara Enim Formation, a claystone unit of the Kasai Formation, and alluvial deposits. Based on lithofacies and maceral analyses, the coal in the study area was deposited in a Transitional Lower Delta Plain environment dominated by freshwater (limnic) swamps. This depositional environment produced Sub-bituminous B rank coal with very low ash and sulfur contents. These conditions indicate that the coal formation process occurred with relatively minimal influence from seawater or clastic sediment input. Thus, the freshwater swamp depositional environment positively influenced coal quality, particularly by resulting in low ash and sulfur levels.]]>
<![CDATA[Geology and Coal Distribution Identification Based on Core Drilling Data in PT Bumi Borneo Inti, Sungai Gelam Subdistrict, Muaro Jambi Regency, Jambi Province ]]>
<![CDATA[Alfathir, Muhammad Rizky]]>;
<![CDATA[Rakhmatul Arafat]]>;
<![CDATA[Said, Yulia Morsa]]>;
<![CDATA[Wicaksono, Tegar Ananto]]>
<![CDATA[ Journal of Geology Mengkarang Vol. 1 No. 2 (2026): Journal of Geology Mengkarang ]]>
Publisher : <![CDATA[Department of Geological Engineering, Faculty Science and Technology, Universitas Jambi ]]>
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DOI: 10.22437/jogm.v1i2.58322
<![CDATA[Jambi Province is one of the areas on the island of Sumatra that have potential source Power coal Enough large . Coal in Jambi is formed from sediment rock sediment. Identification distribution coal is stages important in activity exploration source mineral resources, especially coal. This process aim For know existence coal, good from aspect location, depth, thickness layers, as well as wide its distribution in a region. If not existence identification distribution coal cause activity mining walk without clear data base. As a result, exploration become No efficient, cost increased, and the results production not optimal because location mine could be wrong target. Due to the lack of data on the geology and geometry of the coal distribution of the research area. Therefore, the author wishes to conduct research in the Sungai Gelam District, Muaro Jambi Regency, Jambi Province. The research area that has been seen from the regional geology is included in the Muara Enim Formation, this formation is of Late Miocene - Pliocene age seen from its stratigraphic position. This study aims to determine the geological conditions that include aspects of geomorphology, stratigraphy, geological structure and determine the direction of coal distribution with geological conditions. Based on the results of field and laboratory observations, analyzing relief samples using petrographic rock sections, there are 3 rock units included in the Muara Enim formation, namely the Muara Enim Claystone unit, the Muara Enim Siltstone unit, and the Muara Enim Sandstone unit. The results of observations of the research area show that geomorphologically there are 2 land form units, namely the Denudational Sloping Hill Landform Unit (D1) and the Denudational Undulating Lowland Landform Unit (D2). To determine the direction of coal distribution, drilling data is needed and then a cross-section is made that presents a cross-section of the earth based on exploration data, especially drilling data, so that it can show the position, depth, thickness, and continuity of coal layers (seams) from one point to another.]]>
<![CDATA[Analysis of Geothermal Potential Based on Remote Sensing Interpretation in Lumut Balai, Muara Enim, South Sumatra Province ]]>
<![CDATA[Pratama, Yudha Agung]]>;
<![CDATA[Saputra, Erwin]]>;
<![CDATA[Said, Yulia Morsa]]>;
<![CDATA[Antony, Dedy]]>
<![CDATA[ Journal of Geology Mengkarang Vol. 1 No. 2 (2026): Journal of Geology Mengkarang ]]>
Publisher : <![CDATA[Department of Geological Engineering, Faculty Science and Technology, Universitas Jambi ]]>
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DOI: 10.22437/jogm.v1i2.60204
<![CDATA[Indonesia has significant geothermal energy potential associated with its active volcanic and tectonic setting. The Lumut Balai area in Muara Enim Regency, South Sumatra, is a prospective geothermal area characterized by surface manifestations and geological structures that may control hydrothermal fluid circulation. This study aims to identify indications of geothermal potential in the Bukit Lumut Balai area using remote sensing and spatial data interpretation. Landsat 8 OLI and Digital Elevation Model (DEM) data were analyzed to derive several parameters, including Normalized Difference Vegetation Index (NDVI), Land Surface Temperature (LST), slope, lineament, Fault Fracture Density (FFD), and surface hydrothermal alteration. The parameters were interpreted spatially to identify areas associated with geothermal manifestations and geological structures. The results indicate that geological structures strongly control the Lumut Balai area, particularly lineaments with a dominant NW–SE orientation consistent with Sumatra's regional structural pattern. Areas with high FFD values are interpreted as potential permeable zones that may facilitate hydrothermal fluid circulation. LST analysis identifies surface temperature anomalies, with values reaching approximately 70°C, while areas with high surface temperature generally show lower NDVI values. The alteration map also indicates hydrothermally altered zones associated with structural features. These results, together with the occurrence of hot springs, indicate that the Bukit Lumut Balai area has geothermal potential and that remote sensing can be used effectively as an initial reconnaissance tool to identify prospective geothermal zones.]]>
<![CDATA[Analysis of the Geological Processes of Harau Valley Based on Geomorphological and Geological Structural Reconstruction of the Ngatanting Hills Area, West Sumatra ]]>
<![CDATA[Pratama, T. Rykard Yudha]]>;
<![CDATA[Aisyah, Siti]]>
<![CDATA[ Journal of Geology Mengkarang Vol. 1 No. 2 (2026): Journal of Geology Mengkarang ]]>
Publisher : <![CDATA[Department of Geological Engineering, Faculty Science and Technology, Universitas Jambi ]]>
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DOI: 10.22437/jogm.v1i2.60438
<![CDATA[Harau Valley is one of the distinctive geomorphological regions in West Sumatra, whose landscape development is controlled by the interaction of lithology, geological structures, and geomorphic processes. This study aims to analyze the relationship between geomorphology, lithology, and geological structures in reconstructing the geological processes responsible for the formation of the Harau Valley–Ngatanting Hills landscape. The research method involved field observations, including landform characterization, drainage pattern analysis, lithological identification, and measurements of geological structures such as faults, fractures, and striations. Geomorphological analysis was conducted using morphographic and morphometric approaches based on the Van Zuidam (1983) classification, while structural interpretation was carried out through the analysis of deformation features and structural orientations. The results indicate that the study area is dominated by structurally controlled landforms, including structural hills and structural valleys, characterized by dendritic drainage patterns and V-shaped valleys. The lithological units consist of phyllite, schist, and claystone of the Kuantan Formation, as well as breccia and conglomerate of the Brani Formation. Geological structures such as strike-slip faults, fractures, quartz veins, and striations play a significant role in controlling landscape development. The integration of geomorphological, lithological, and structural data suggests that the Harau Valley landscape evolved through the interaction of tectonic deformation, lithological resistance differences, weathering, and erosion processes.]]>
<![CDATA[The Role of Karst Areas in Carbon Dioxide Sequestration: A Literature Review ]]>
<![CDATA[Saleh, Isman]]>
<![CDATA[ Journal of Geology Mengkarang Vol. 1 No. 2 (2026): Journal of Geology Mengkarang ]]>
Publisher : <![CDATA[Department of Geological Engineering, Faculty Science and Technology, Universitas Jambi ]]>
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DOI: 10.22437/jogm.v1i2.60441
<![CDATA[Karst areas play an important role in the global carbon cycle through interactions among carbonate weathering, soil carbon dioxide, groundwater, vegetation, and atmospheric processes. This study reviews the role of karst areas in carbon dioxide sequestration by synthesizing evidence on natural carbon cycling and the potential for engineered geological storage. A systematic literature review was conducted on studies addressing carbon dioxide fluxes, carbonate dissolution and precipitation, dissolved inorganic carbon transport, vadose zone carbon storage, hydrogeological controls, and carbon dioxide storage in carbonate reservoirs. The reviewed literature indicates that karst systems function simultaneously as carbon sinks and sources. Carbon dioxide is consumed during carbonic acid driven carbonate dissolution, while subsequent degassing, carbonate reprecipitation, and vadose zone outgassing can return carbon dioxide to the atmosphere. The magnitude and direction of carbon fluxes are controlled by soil carbon dioxide production, vegetation and microbial activity, hydrological flow paths, residence time, climate, and sea level changes. Karstified carbonate formations also show potential for engineered carbon dioxide storage, although heterogeneous conduit networks and complex fluid pathways present challenges for containment and monitoring. Overall, karst areas represent dynamic and spatially variable components of the global carbon cycle. Further long term and multi site monitoring is required to improve quantification of their net contribution to atmospheric carbon dioxide sequestration and to assess the feasibility and security of engineered storage.]]>
