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INDONESIA
Journal of Geosciences and Applied Geology
Published by Universitas Padjadjaran
ISSN : 25793136     EISSN : 25793136     DOI : https://doi.org/10.24198/gsag.v7i3
Core Subject : Science, Engineering,
Earth & Planetary Sciences Engineering
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
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Geologi
Articles 117 Documents
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The Face Mask Waste Recycling Generated During Covid-19 Pandemic In Indonesia Ahmad Helman Hamdani; Agus Didit Haryanto
Journal of Geological Sciences and Applied Geology Vol 5, No 2 (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.v5i2.34996

Abstract

In Indonesia, the COVID-19 disease has developed rapidly as found on April 20, 2021, there were 1,614,849 positive cases of Covid-19. The increase in cases of the coronavirus has resulted in an increase in the amount of medical waste during the Covid-19. The most common medical waste is face masks, both from hospitals and households. This increase in medical waste will cause environmental damage or health problems.  "A viable solution for reducing the impact of face mask waste on health and the environment is to recycle the face mask mechanically, chemically, and thermally. The proximate, ultimate, FTIR analysis and hardness testing have been carried out to obtain the potential for recycled products. The test results show that carbon ( C ) and volatile matter  (VM)are found in large quantities; polypropylene content is a detected type of plastic. Thus, recycled products can generate potential as a source of renewable energy, cement replacement materials, pipes, packaging materials.. Besides being able to produce new products, this process can also eliminate viruses.
Miocene Planktonic Foraminiferal Biozonation for South Sumatra Basin, Indonesia Djadjang Jedi Setiadi; . Hendarmawan; Edy Sunardi; Eddy Arus Sentani; Johanes Hutabarat
Journal of Geological Sciences and Applied Geology Vol 2, No 3 (2017): 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.v2i3.15615

Abstract

Planktonic foraminifera are widely utilized for marine sediments analysis and recent developments in the geochronology of planktonic foraminifera has improved their values as a tool for sedimentary basin analysis. Assessment on the applicability of the “standard” foraminiferal biozonations (e.g., Bolli, 1966; Blow, 1969; and Postuma, 1971) to the biostratigraphy data of the South Sumatra Basin suggests that the standard zones, which are mostly interval-zones defined by first occurrence events, are hardly applicable to the biostratigraphy data derived from the examination of well-cuttings routinely and continuously used in most sedimentary basin studies in Indonesia.The proposed biozonation in this paper were constructed based on two considerations, i.e. information on the biostratigraphy events as indicated in regional- and global-scale biozonation schemes and the occurrence of foraminifera species in the South Sumatra Basin. The correlation between the proposed zonation and that of Blow’s (1969) scheme suggests that the proposed zonation is basically a Blow’s zonation and, accordingly, may be perceived as a modified Blow’s zonation for South Sumatra Basin. 
SETTLEMENT IN THE NOTHERN PART OF BEKASI REGENCY, WEST JAVA PROVINCE, BASED ON CONE PENETRATION TEST DATA Siti Nadia Jatsiah; Ismawan Ismawan; Nur Khoirullah; Tulus Pramudyo
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

Abstract

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.
THE APPLICATION OF LANDSAT IMAGERY PROCESSING FOR EROSION STUDY Emi Sukiyah; Kurnia Arfiansyah Fachrudin
Journal of Geological Sciences and Applied Geology Vol 4, No 3 (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.v4i3.32240

Abstract

Landsat imagery has a relatively smaller resolution than topographic maps, within certain limits it can support the morphometric analysis of a watershed. The results of the average difference test between the drainage density population from Landsat imageries and topographic maps, at a significant level of 0.20, are proven to be significant. In certain cases, its value can reflect the effectiveness of erosion in an area. For relatively supportive bedrock types, it is can reflect the erodibility of soil from weathering the bedrock. Combination of fit some bands of Landsat Images can appear unique tones and features. They can lead for erosion zones delineation. Thus phenomena reflected by various scatter gram patterns. The range of digital number can reflect erosion grade by ratio analysis of band 1- band 4 and band 1- band 7. The phenomenon shows that Landsat imagery can be used for delineation of erosion zones based on the characteristics of the earth's surface constituent materials through digital number range analysis.
MINERALIZATION CHARACTERISTICS OF KIARAPAYUNG, CIBALIUNG DISTRICT, PANDEGLANG, BANTEN Mira Widyariestha; Mega Fatimah Rosana; Iyan Haryanto; Andi Kurniawan
Journal of Geological Sciences and Applied Geology Vol 3, No 1 (2019): 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.v3i1.21577

Abstract

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.
CORRELATION DEGREE SERPENTINIZATION OF SOURCE ROCK TO LATERITE NICKEL VALUE THE SAPROLITE ZONE IN PB 5, KONAWE REGENCY, SOUTHEAST SULAWESI Wisnu Indra Bahtiar; Aton Patonah; Mega Fatimah Rosana
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.v6i1.45211

Abstract

The PB5 study area, Konawe district, Southeast Sulawesi is a mining area included in the IUP of PT Sulawesi Cahaya Mineral which is dominated by serpentinized ultramafic rocks. Geological mapping, drilling data, petrographic analysis, X-Ray Fluorescence (XRF), and magnetic susceptibility are used to identify the characteristics of serpentine minerals, characteristics of serpentinization levels, and the correlation of serpentinization levels to nickel laterite levels in the study area. The serpentine mineral types in the study area are lizardite, chrysotile, and antigorite resulting from the alteration of olivine and pyroxene minerals. Lizardite is characterized by mesh, bastite, and hourglass textures. Chrysotile is characterized by filamentous textures and antigorite is characterized by interpenetrating and interlocking textures. The serpentined rocks are predominantly low serpentine with the mesh and bastite textures of the lizardite characterizing the early mineral alteration processes of olivine and pyroxene. Antigorite begins to be present in rocks that experience medium-high serpentinization levels and indicates that antigorite is the result of a high-intensity serpentinization process.  The serpentinization level of the study area is divided into 3 (three) types, namely (1) low serpentinization characterized by the serpentine distribution of 0%-39%, LOI <7%, and magnetic value of 0o-5o, (2) medium serpentinization with the serpentine distribution of 40%-59%, LOI 7-10%, and magnetism value of 5o-10o, and (3) high serpentinization characterized by the distribution of 60%-100%, LOI >10%, and magnetism value >10o. Rocks that experience low serpentinization and medium serpentinization levels have a fairly good nickel content development with Ni concentration factors of 5.13 units and 4.34 units. While rocks that experience a high level of serpentinization have poor nickel development with a Ni concentration factor of 2.43 ppm. 
STRATIGRAPHIC ANALYSIS : RAJAMANDALA FORMATION AND CITARUM FORMATION BASED ON OUTCROPS DATA Reza Mohamad Ganjar Gani; Yusi Firmansyah; Satrio Fajar Pamengkas
Journal of Geological Sciences and Applied Geology Vol 4, No 1 (2020): 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.v4i1.29112

Abstract

The location of study area is in Padalarang, West Java with Rajamandala Formation and Citarum Formation outcrop as observation object. Rajamandala Formation is characterized by shallow marine deposit and carbonate sedimentary rock. Meanwhile, Citarum Formation is identified as deep marine deposit and consists of clastic sedimentary rock. The methods used in this study are fieldwork, laboratory analysis, data interpretation, and stratigraphic analysis. Laboratory analysis consists of petrographic analysis and foraminiferal analysis. The contact between these formations is not identified in study area. Outcrop observation exposes improper data to determine the stratigraphic relation, since covered by debris materials of limestone. Foraminiferal analysis data shows that Rajamandala Formation is formed in Late Oligocene (Lower Te/P20 – P22/N1 – N3) and Citarum Formation is formed in Middle Miocene (N9 – N13). It shows gap of time from N3 until N9. It determines an uncorformity stratigraphic relation between these two formations. The depositional environment changes significantly from shallow marine to deep marine. Study area exposes outcrops data which represent these formations and other additional data needed. It offers a good opportunity to determine the stratigraphic relation between these two formation. Furthermore, it can be used as analogue in determining stratigraphic relation.
GEOPLANOLOGY MODELING IN THE PLANNING AREA OF MAJALENGKA, WEST JAVA Dede Nurohim; Channia Princessca; Nur Khoirullah; Nana Sulaksana; Teuku Yan Waliana
Journal of Geological Sciences and Applied Geology Vol 2, No 6 (2018): 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.v2i6.20871

Abstract

Based on the geological condition, the study area consisted of carbonate sandstone units (Tmbp), claystone units (Tml), non-carbonate sandstone units (Tpbp), andesitic intrusions (Ia), volcanic breccia units (Qbv), and alluvium (Qal) units. The different types of constituent rocks will affect the innate characteristics or properties of the rock. The regional genetic units explain kinship relations between lithology, morphology, and tectonics. It is used to determine the genetic processes that occur in an area which will later be developed into the smallest units in the geological analysis. In terms of spatial planning, the geological analysis is needed to produce an ideal area in terms of water adequacy, environmental carrying capacity, and disaster. In accordance with Law No. 11 of 2011 concerning the district development plan of Majalengka, then a layout plan emerged that would be applied to the area. Especially in the research area, land suitability covers a possible area that has a value of> 131, spread in the north to the west of the research area, with high to the very high land capability to be developed. The constrained area which has a value of 121-131 is spread in the north to south of the research area, with the ability of the land to be developed. And the limitation area has a value of <121 dominating in the northwest to the southeast of the research area, with low land capacity - very low to be developed. Based on the analysis, there are still some areas that are not in accordance with the pattern of development which should be mainly the development of protected areas.
Determining of Coefficient Correlation between UCS and PLI data for Various Rock Types at Batu Hijau Mine PT Amman Mineral Nusa Tenggara Yan Adriansyah; Zufialdi Zakaria; Dicky Muslim; Johanes Hutabarat
Journal of Geological Sciences and Applied Geology Vol 2, No 1 (2017): 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.v2i1.13418

Abstract

AbstractThe Batu Hijau Mine is one of the biggest gold-copper producer in Indonesia which operated by PT Amman Mineral Nusa Tenggara (PTAMNT). The mine site is located in the southwest corner of Sumbawa Island in the Sunda-Banda Archipelago in Indonesia. Based on the tectonic plate perspective, the Sumbawa Island lies along the tectonically active rock sequences.Refers to the geological model from comprehensive study starting from the exploration up to exploitation stages, there are four rock types that formed the slope at Batu Hijau Mine, namely volcanic rock, diorite, tonalite and young tonalite. The volcanic rock as a host rock is the most dominant material among the other rocks type which expose on the north-west, west and south wall.This study was focused on determining of the index conversion factor of the relation between uniaxial compressive strength (UCS) and point load test (PLT) data which obtained from the laboratory test result. The correlation factor for predicting UCS value from the PLT data for each rock type has shown the good correlation with the average of regression value is 0.88.  Keywords : Batu Hijau, Uniaxial Compressive Strength, Point Load Test, Conversion Factor. 
Carbonate Facies and Depositional Environment On Baturaja Formation, “Mk” Field, Jatibarang Sub-Basin. Manwarjit Manwarjit; Ildrem Syafri; Febriwan Mohamad; Asep Ginanjar
Journal of Geological Sciences and Applied Geology Vol 5, No 3 (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.v5i3.35462

Abstract

Facies are defined as a rock body that have a combination of characteristics that are related to the physical, biological, or chemical aspects seen from rock lithology, sedimentary structures that distinguish the rock body from the rocks above, below or laterally in other parts (Walker, 1992). This paper aimed to determine the facies and depositional environment that developed in the upper part of Baturaja Formation. The facies distribution analysis can be used as an early interpretation for the characterization of carbonate reservoir. In this research, the facies and depositional environment analysis is carried out by integrating core data, thin section, and wireline log. Based on this analysis, it is identified that 4 facies were deposited in 4 different types of depositional environment and time, which are Facies Floatstone (Facies I), Facies Wackstone- Packstone (Facies II), Facies Floatstone- Framestone (Facies III), dan Facies Floatstone- Rudstone (Facies IV). All facies are correlated to every well using electrofacies analysis so that the facies distribution on every well can be shown. The output of facies distribution can be illustrated into a cross-section of well-correlation.Keywords:  Characterization, Facies distribution, Electrofacies, Well-correlation  

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