Journal of Geosciences and Applied Geology
Journal of Geological Sciences and Applied Geology (GSAG) is a National multidisiplinary Journal focus on Geological Sciences, Applied Geology, and Geological Engineering and Earth Science. Our Mission is to publish research related to (but not limited) Geology Petrology Paleontology Stratigraphy Sedimentology Remote Sensing Geomorphology GIS Engineering Geology Geotechnics Geochemistry Geophysics Geological Hazard and Disaster Geopark Hazard Mitigation Geography Earth Sciences
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<![CDATA[DETERMINING MATURITY RATE OF HYDROCARBON USING SAMPLE CORE FROM GEOCHEMISTRY SURVEY IN PADAMARANG SUB-BASIN, BONE GULF, SOUTH OF SULAWESI ]]>
<![CDATA[Widyatri Pusparini]]>;
<![CDATA[Nisa Nurul Ilmi]]>;
<![CDATA[Edy Sunardi]]>
<![CDATA[ Journal of Geological Sciences and Applied Geology Vol 3, No 1 (2019): Journal of Geological Sciences and Applied Geology ]]>
Publisher : <![CDATA[Faculty of Geological Engineering, Universitas Padjadjaran ]]>
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DOI: 10.24198/gsag.v3i1.21231
<![CDATA[Sulawesi is one of the area in Eastern Indonesia that still has frontier area. South Sulawesi has several basins which formed as a result of tectonic activity that caused a geological condition complexity. The complexity of the regional geology is one of the interest of this research. The presence of gas seep within research area ensure that there is a potential petroleum system underneath the surface of the research area which is Padamarang sub-Basin, Bone Basin, South of Sulawesi. New insights into Bone Gulf is based on surface geochemical exploration that came up with 26 core sea sediments samples using piston core acquisition that has been analyzed with Gas Chromatography in sediment extract. This study aims to identify the geochemical characteristics of migrated hydrocarbon. These geochemistry characteristics referred to depositional environment and maturity determination that are analyzed using non biomarker parameters including CPI and OEP, and cross plot between CPI and Pr/Phy. According to the CPI value has shown the number from 0.169 to 1.27 with the majority of the values is 0.4. While OEP value has shown the number from 0.312 to 1.5 with the majority of the values is 0.75. Thus, according to the majority value of CPI and OEP, we could determine that it was thermally immatured.Keywords: Biomarker, Core, Geochemical, Non Biomarker, Padamarang]]>
<![CDATA[MINERALIZATION CHARACTERISTICS OF KIARAPAYUNG, CIBALIUNG DISTRICT, PANDEGLANG, BANTEN ]]>
<![CDATA[Mira Widyariestha]]>;
<![CDATA[Mega Fatimah Rosana]]>;
<![CDATA[Iyan Haryanto]]>;
<![CDATA[Andi Kurniawan]]>
<![CDATA[ Journal of Geological Sciences and Applied Geology Vol 3, No 1 (2019): Journal of Geological Sciences and Applied Geology ]]>
Publisher : <![CDATA[Faculty of Geological Engineering, Universitas Padjadjaran ]]>
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DOI: 10.24198/gsag.v3i1.21577
<![CDATA[PT Cibaliung Tbk is one of active underground gold mining in West Java. The mineralization type is Au-Ag adularia-sericite low sulphidation (Angeles et al, 2002). Study area is located southeastward from main veins of Cibaliung, administratively in Kiarapayung village, Cibaliung District, Pandeglang, Banten. From previous study it is known that acid alteration typical of high sulphidation deposit also occurred in study area. This research aim to observe the characteristics of mineralization in study area, comprising of its occurrence, trend, and ore minerals present. This research use field observation and ore microscopy as main method to identify mineralization characteristics. Mineralization occurred in the field as quartz and silica veins with various textures; vuggy quartz; and silica-pyrite replacement bodies. Most veins have NW-SE trend, similar to trends of major faults in research area. Vuggy quartz and replacement zones distribution also found restricted to geological structures. Pyrite distribution in wallrock also showed trend that associated with geological structures. Textural observation with binocular microscope in veins and replacement zone showed rock brecciation process before ore-bearing alteration. Ore minerals present are pyrite and chalcopyrite with minor galena and chalcocite. Mineralization characteristics indicate there is low sulphidation and high sulphidation type mineralization in study area. Both mineralization are strongly influenced by geological structures.Keywords: mineralization, veins, vuggy quartz, texture, structural control.]]>
<![CDATA[IDENTIFICATION OF THERMAL MATURITY, SOURCE AND DEPOSITIONAL ENVIRONMENT FROM CORE SAMPLE OBTAINED FROM UNDERWATER GEOCHEMISTRY SURVEY IN KABAENA SUB-BASIN, BONE BASIN, SOUTHERN PART OF SULAWESI ]]>
<![CDATA[FARHAN TAUFIK SYABAN]]>;
<![CDATA[Nisa Nurul Ilmi]]>;
<![CDATA[Edy Sunardi]]>
<![CDATA[ Journal of Geological Sciences and Applied Geology Vol 3, No 1 (2019): Journal of Geological Sciences and Applied Geology ]]>
Publisher : <![CDATA[Faculty of Geological Engineering, Universitas Padjadjaran ]]>
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DOI: 10.24198/gsag.v3i1.21232
<![CDATA[Bone Gulf in South Sulawesi is an area with the possibility of potential hydrocarbon deposits. This research was conducted to examine the characteristics of Hydrocarbons gotten from Core Extractionfrom underwater geochemistry survey in the area of study by geochemical analysis methods and compared with known geological data. Geochemical analysis was carried out on 27 seabed-core samples taken from the area around the Kabaena sub-basin to determine the maturity level and depositional environment and the source of organic material from the Hydrocarbon producing Source Rock. Determination of the maturity level and depositional environment is based on CPI and OEP value, as well as N-Alkane and Isoprenoids which obtained from Gas Chromatography (GC). Geochemical analysis for the maturity level of all the samples showed the maturity level of immature to mature. Geochemical analysis for depositional environments on all samples showed a tendency to be deposited in the transitional and the sources of organic material is Mixed Kerogen.Keywords: Bone Gulf, Hydrocarbon, CPI and OEP, N-Alkane, Geochemistry Analysis, Source RockABSTRACTBone Gulf in South Sulawesi is an area with the possibility of potential hydrocarbon deposits. This research was conducted to examine the characteristics of Hydrocarbons gotten from Core Extractionfrom underwater geochemistry survey in the area of study by geochemical analysis methods and compared with known geological data. Geochemical analysis was carried out on 27 seabed-core samples taken from the area around the Kabaena sub-basin to determine the maturity level and depositional environment and the source of organic material from the Hydrocarbon producing Source Rock. Determination of the maturity level and depositional environment is based on CPI and OEP value, as well as N-Alkane and Isoprenoids which obtained from Gas Chromatography (GC). Geochemical analysis for the maturity level of all the samples showed the maturity level of immature to mature. Geochemical analysis for depositional environments on all samples showed a tendency to be deposited in the transitional and the sources of organic material is Mixed Kerogen.]]>
<![CDATA[Application of Magnetotellurics and Transient electromagnetic in Kibiro Geothermal Prospect-Western Uganda. ]]>
<![CDATA[Andi Agus Nur]]>;
<![CDATA[Denis Mutebi]]>;
<![CDATA[Yoqi Ali Taufan]]>;
<![CDATA[Irpan ilmi]]>
<![CDATA[ Journal of Geological Sciences and Applied Geology Vol 3, No 1 (2019): Journal of Geological Sciences and Applied Geology ]]>
Publisher : <![CDATA[Faculty of Geological Engineering, Universitas Padjadjaran ]]>
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DOI: 10.24198/gsag.v3i1.19866
<![CDATA[ABSTRACTGeophysics is an extremely important tool in geothermal exploration. Magnetotellurics (MT) and Transient electromagnetic (TEM) techniques are some of the widely used geophysical exploration techniques in Kibiro Geothermal prospect in Western Uganda. Between 2004 and 2016, a total of 157 TEM and 64 MT stations were acquired using DGSM Geonics Protem 57, Phoenix, and Zonge GDP32-12 systems. A central loop system receiver for TEM survey was used and frequency range for MT survey was between 0.5 and >200 Hz. The MT and TEM surveys imaged low resistivity clay-rich lake beds that cap a higher resistivity and potentially permeable clastic reservoir below 150 m depth. The unusually very low resistivity zone on top of the clay rich sediments inferred a hydrothermally altered sedimentary clay zone; and therefore a hot permeable aquifer exists below 150km depth. MT data imply that the North Tooro-Bunyoro (NTB) Fault dips steeply beneath sediments to the northwest.Key words: Geophysics, Magnetotellurics, Electromagnetics, resistivity, Clay.]]>
<![CDATA[Control of Geological Structure on the Springs Distribution and Their Physical Properties. Case Study: Southern Slope of Mt. Lampobattang, South Sulawesi ]]>
<![CDATA[GALIH AJI MAHENDRA]]>;
<![CDATA[Teuku Yan Waliana Muda Iskandarsyah]]>;
<![CDATA[Ismawan ismawan ismawan]]>;
<![CDATA[Ciria Humanis Brilian]]>
<![CDATA[ Journal of Geological Sciences and Applied Geology Vol 3, No 1 (2019): Journal of Geological Sciences and Applied Geology ]]>
Publisher : <![CDATA[Faculty of Geological Engineering, Universitas Padjadjaran ]]>
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DOI: 10.24198/gsag.v3i1.21235
<![CDATA[The study area is located at Southern Slope of Mt. Lampobattang, South Sulawesi. According to Armstrong (2012), Sulawesi is controlled by a complex geological structure. This condition can affect the characteristics of subsurface groundwater (Ismawan, 2013) specifically on the distribution and physical properties of springs. So, this research is needed to do. The aim of this study is to know the effect of geological structure on the distribution and physical properties of springs in the study area. This research was conducted with a qualitative analysis method of field data which resulted by geological and hydrogeological mapping at the study area. Based on the analysis results, the study area is consisted of 7 rock units consist of tuff, breccia and lava. There are 6 faults that control the study area with SW-NE and SE-NW trend. The study area is divided into 3 fracture density zones, those are low fracture density (0-500 M-1), medium fracture density (500-950 M-1), and high fracture density (950-1200 M-1). The geological structure affects the distribution of springs and their physical characteristics. This is evidenced by the appearance of springs along the fault and in the medium to high density zone. The characteristics of the Physical Properties of springs are influenced by the occurrence of faults and fractures in the study area that make the low values of EC and TDS. TDS values of springs have a vulnerable value of 0-193 ppm and EC values 0-357 μS. Therefore, the fracture and fault as the geological structure affect the distribution and physical properties of springs in the study area.]]>
<![CDATA[Liquefaction Potential based on Earthquake History in Sanana Region, Sula Island Regency, North Maluku, Indonesia ]]>
<![CDATA[Ulfia Sari Pajrin]]>;
<![CDATA[Zufialdi Zakaria]]>;
<![CDATA[Raden Irvan Sophian]]>;
<![CDATA[Nur Khoirullah]]>;
<![CDATA[Aziez Mubarak]]>;
<![CDATA[Jodi Prakoso Basuki]]>
<![CDATA[ Journal of Geological Sciences and Applied Geology Vol 3, No 1 (2019): Journal of Geological Sciences and Applied Geology ]]>
Publisher : <![CDATA[Faculty of Geological Engineering, Universitas Padjadjaran ]]>
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DOI: 10.24198/gsag.v3i1.21947
<![CDATA[Sula Islands is a region in Maluku Province that is very vulnerable to earthquakes because it is located on an active seismic line. One of the disasters that often accompanies earthquakes is liquefaction. Sandy soil in a saturated condition will lose its strength when an earthquake occurs, thus endangering the building above it. The aim of the study was to determine seismicity and estimate the liquefaction potential of the earthquake history and CPT test in the Sanana region and its surroundings. The method in this study uses a "simplified procedure" method for evaluating liquefaction resistance of soils. 2 main parameters were sought in this study, CSR obtained based on tectonic conditions and a history of seismicity and CRR obtained from the results of CPT testing. The results showed that seismicity in the Sanana region was sourced from Sula-Sorong active fault activity with a history of the greatest magnitude of 8.1 and 7.7. As for the calculation results from CPT data, the Sanana area has the potential for liquefaction of sand medium material at a depth of 5-12 m for earthquakes with magnitude 7.5 and 4 -12 m in magnitude 7.7 and 8.1. The potential for liquefaction in this area is caused by the type of saturated medium sand material and this location which is close to the active fault activity of Sula-Sorong. Therefore, it is necessary to evaluate the potential for liquefaction in planning, building and developing infrastructure in earthquake-prone areas so that disasters of liquefaction can be prevented.]]>
<![CDATA[PROSPECTIVE ZONE AREA FOR AGRICULTURE AND RESIDENTIAL BASED ON GEOLOGICAL DISASTER POTENTIALS IN SOUTH BANDUNG REGION ]]>
<![CDATA[NANA SULAKSANA]]>;
<![CDATA[Teuku Yan Waliana Muda Isandarsyah]]>;
<![CDATA[Achmad Rifai]]>;
<![CDATA[Pradnya Paramarta Raditya Rendra]]>;
<![CDATA[Murni Sulastri]]>
<![CDATA[ Journal of Geological Sciences and Applied Geology Vol 3, No 1 (2019): Journal of Geological Sciences and Applied Geology ]]>
Publisher : <![CDATA[Faculty of Geological Engineering, Universitas Padjadjaran ]]>
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DOI: 10.24198/gsag.v3i1.21366
<![CDATA[The number of residents in Bandung continues to increase every year, especially in the southern part of Bandung. The development of residential areas needs to get attention from the local government and people in Bandung, especially to evaluate various geological hazards such as floods, landslide, earthquake, and other. Research methodolgy is qualitative method by interviewing local community and analyzing landsat image using Google Earth and Digital Earth Model (DEM) image to know land use in the research area. In addition, quantitative methods are also used with superimposed manual statistical analysis and weighting methods using Microsoft Excel, Global Mapper, and Mapinfo software. The result of research shows that South Bandung area has Land Suitability Score > 130 (Residential Area) and Land Suitability Score > 135 (Agriculture Area) which are categorized as very good settlement and education area; Land Suitability Score 116-130 (Residential Area) and Land Suitability Score 92-135 (Agriculture Area) are categorized as an obstacle area with various constraints such as water supply, disaster, and others but can still be overcome by artificial engineering. Land Suitability Score <116 (Residential Areas) and Land Suitability Score <92 (Agricultural Area) are limitation area that are not feasible to be used as residential and educational areas, a variety of constraint reduction efforts can be done but require very high cost. Therefore it is suggested to convert the area into conservation. It is concluded that the best areas to be used as residential and agricultural areas are located in the Banjaran District such as Banjaran, Kamasan, Sindangpanon, and Tarajusari Village.]]>
<![CDATA[CORRELATION BETWEEN OVERALL SLOPE AND SLOPE STABILITY OF HIGHWALL IN PIT TUNGGAL, BORNEO ]]>
<![CDATA[VITO ARISTO MANIK]]>;
<![CDATA[WIWIN JUNITA NINGRUM]]>;
<![CDATA[NUR KHOIRULLAH]]>;
<![CDATA[RADEN IRVAN SOPHIAN]]>;
<![CDATA[ZUFIALDI ZAKARIA]]>
<![CDATA[ Journal of Geological Sciences and Applied Geology Vol 3, No 1 (2019): Journal of Geological Sciences and Applied Geology ]]>
Publisher : <![CDATA[Faculty of Geological Engineering, Universitas Padjadjaran ]]>
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DOI: 10.24198/gsag.v3i1.22030
<![CDATA[Slope stability is an important aspect of the mining operation. Hence, an in-depth understanding of slope stability and variable that affect it is very crucial. This research was conducted in pit tunggal, Borneo. The aim of this research is to identify the correlation between overall slope and slope stability in highwall slope at pit tunggal. Slope stability analysis was conducted with SLIDE V 6.00 software using Morgenstern-Price’s limit equilibrium method. The result of this research shows that, as the highwall slope gets steeper, the slope stability represented by a factor of safety (FS) may decrease. Otherwise, when the highwall slope gets declivous, the factor of safety may increase.]]>
<![CDATA[Evidence of Pliocene-Pleistocene Unconformity in eastern Bogor Trough, Sumedang-West Java ]]>
<![CDATA[Syaiful Alam]]>;
<![CDATA[Yoga Andriana Sendjadja]]>;
<![CDATA[Lia Jurnaliah]]>;
<![CDATA[Kurnia Arfiansyah Fachrudin]]>;
<![CDATA[Reza Mohammad Ganjar Gani]]>
<![CDATA[ Journal of Geological Sciences and Applied Geology Vol 3, No 1 (2019): Journal of Geological Sciences and Applied Geology ]]>
Publisher : <![CDATA[Faculty of Geological Engineering, Universitas Padjadjaran ]]>
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DOI: 10.24198/gsag.v3i1.21528
<![CDATA[AbstractRecent measuring stratigraphic observation in Cikandung River has revealed the Late Pliocene stratigraphic and tectonic event. Research area is located in easter Bogor Trough. Previously, it was stated controversially pertaining to the stratigraphic relationship between Kaliwangu and Citalang Formations. The outcrop-based remark has never been explained, slightly intuitive. Making strike and dip measurements and stratigraphic analysis using tape and compass traverse were done to unveil the role of Plio-Pleistocene tectonic regime in stratigraphic-filling of the basin. Strike azimuths recorded from several locations of Citalang and Kaliwangu Formations show angular geometry and both of those sedimentary facies within formations indicate the significant and rapid change in depositional process. But interestingly, the angular geometry is only founded in the southern part of study area. To the north, angular relationship becomes parallel. This geometrical distribution implies the strong influence of tectonic regime in Late Pliocene interval. The evidence from outcrops observation conclude the unconformity between Citalang and Kaliwangu Formations. Keywords: Stratigraphic unconformity, Citalang and Kaliwangu Formations, Plio Pleistocene Tectonic]]>
<![CDATA[SMALL BENTHIC FORAMINIFERA AS AN INDICATOR OF PALEOTSUNAMI IN UJUNGKULON, BANTEN PROVINCE, INDONESIA ]]>
<![CDATA[Ria Fitriany]]>;
<![CDATA[Lia Jurnaliah]]>;
<![CDATA[T. Y. Waliana Muda Iskandarsyah]]>
<![CDATA[ Journal of Geological Sciences and Applied Geology Vol 3, No 1 (2019): Journal of Geological Sciences and Applied Geology ]]>
Publisher : <![CDATA[Faculty of Geological Engineering, Universitas Padjadjaran ]]>
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DOI: 10.24198/gsag.v3i1.22241
<![CDATA[Research area is located at 1050 27” 6,99” E and 60 50’ 1,29” S. The purpose of this research is to know the diversity of small benthic foraminifera on “X” core, Ujung Kulon, Banten Province, Indonesia. Sixteen sediment samples (paleotsunami deposits) from research area were analyzed to collect small benthic foraminifera. Sediment samples are coastal sediment that were taken from one drill point by using shallow drill to a depth 240cm from the ground. Sampling for analyses small benthic foram was conducted in each layer sediment. At this stage, sequence of layers and the thickness of sediment were observed. In order to separate the sediments and the foraminifera, sediment samples were treated using Hydrogen Peroxide method. Small benthic foraminifera data is collected by using quantitative method. The number of species and individuals were counted in every 1 gram dry sample. Analyses of small benthic foraminifera shows there are 55 species small benthic foraminifera and 43.866 specimen. The dominance species is Planulina wuellerstorfi which is a deep marine species. Furthermore, The Sannon-Wiever diversity index of all sample are low. It can be concluded that was a paleotsunami. ]]>
