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All Journal Bulletin of Scientific Contribution : Geology IJOG : Indonesian Journal on Geoscience Journal of Geoscience, Engineering, Environment, and Technology Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources) Buletin Sumber Daya Geologi Jurnal Geologi Kelautan: Media Hasil Penelitian Geologi Kelautan Jurnal Sosial Ekonomi Pekerjaan Umum Journal of Geoscience Engineering and Energy (JOGEE) Prosiding Seminar Nasional Rekayasa Teknologi Industri dan Informasi ReTII Aceh International Journal of Science and Technology Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources) Journal of Geosciences and Applied Geology
Mega Fatimah Rosana
Faculty of Geology, Padjadjaran University, Jln. Raya Bandung - Sumedang Km. 21
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Transportation

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MINERALIZATION CHARACTERISTICS OF KIARAPAYUNG, CIBALIUNG DISTRICT, PANDEGLANG, BANTEN Widyariestha, Mira; Rosana, Mega Fatimah; Haryanto, Iyan; Kurniawan, Andi
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 Bahtiar, Wisnu Indra; Patonah, Aton; Rosana, Mega Fatimah
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. 
THE MORPHOTECTONIC CHARACTERISTIC OF BUOL WATERSHED AND IMPLICATION TO SPATIAL PLANNING IN BUOL REGION, CENTRAL SULAWESI, INDONESIA Tawil, Sukardan; Sukiyah, Emi; Rosana, Mega Fatimah; Muslim, Dicky; Raditya Rendra, Pradnya Paramarta
Journal of Geological Sciences and Applied Geology Vol 3, No 2 (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.v3i2.23081

Abstract

The Buol watershed is located on the northern arm of Sulawesi Island. Geomorphology in this region is controlled by developing faults. Geomorphological analysis is done to obtain objective results. Geomorphological variables can explain significantly the geomorphic process itself. The studio, field and laboratory methods is used in this research. Studio analysis consists of topographical map, satellite imagery, Ratio of valley Floor Width to Valley Height (Vf), Mountain Front Sinuosity (Smf), Drainage density (Dd), and Bifurcation Ratio (Rb) analysis. Also, statistical test is used to determine the relationship between these variables. Research area in watershed Buol has landform, namely lowland, low hills, hills, and high hill. Drainage pattern that developed namely anastomotic, sub-dentritic, sub-parallel, trellis, and sub-trellis drainage pattern. The results of the watershed morphometry analysis show calculation of the average value of Rb is 1.48 to 6.24, value of Dd average from 1.17 to 2.45., Smf value ranged from 1.6 to 1.76 and Vf ratio range from 0.5 to 1. That phenomenon shows that the Buol watershed is controlled by tectonic.
Petrogenesis of Andesite in Bukitcula, Baleendah District, Southern Bandung, West Java Asrial, Nouval Muamar; Rosana, Mega Fatimah; Fachrudin, Kurnia Arfiansyah; Nordin, Nazihah
Journal of Geological Sciences and Applied Geology Vol 3, No 3 (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.v3i3.23851

Abstract

Administratively, Bukitcula Lava located in the area of Baleendah, Southern Bandung, West Java . Geographically located at Longitude 107o36'00" to 107o39'00" and Latitude 7o00'00" to 7o02'42". Baleendah Lava Complex consisted of steeply hill composed by andesite. Petrology, petrography and geochemical studies (XRF analysis) were used to understand the detail of rock characteristics. Petrological analysis studies shows mineral abundances of feldspar, amphiboles, pyroxenes and opaque mineral. Petrographical analysis show abundances of plagioclase, pyroxene, hornblende, and groundmass composed by plagioclase microlites, volcanic glass, and opaque mineral. Texture found in petrography analysis shows glomeroporphyritic, sieve, pyroxene penetration twin, zoning, and trachytic. Based on geochemical analysis, Bukitcula Lava composed by basaltic andesite and andesite according to TAS diagram. The magmatic series of rocks is Calc-Alkali and Tholeiitic series, with High-K and Medium-K (Calc-Alkaline Series) magma group. Magma interract with continental crust, with tectonical setting related on Island Arc Calc-Alkaline Basalt, and origin of magma ranged ranged from ± 139 km - ± 148 km in the Benioff zone. We conclude that the forming of Baleendah Lava Complex was influenced by fractional crystalization and slightly magma mixing.
STRUCTURAL CONTROL OF ALTERATION AND MINERALIZATION IN PROSPECT “X-Y”, POHUWATO REGENCY, GORONTALO PROVINCE Wirdan, Muhammad Faisal; Rosana, Mega Fatimah; Yuningsih, Euis Tintin; Rompo, Ahmad Iryanto; Ismail, Fajar
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.v5i3.35791

Abstract

The prospect “X-Y” is located in Gorontalo Province, a part of “gold district” with NW-SE arc-normal, E-W arc-parallel, and NS-NNE subsidiary lineament features and localize geological setting in the northern arm of Sulawesi. Regional geology of Sulawesi's northern arm is characterized of volcanoplutonic magmatic by typical Eocene to Recent island-arc assemblages (Hamilton, 1979). An older basement composed of granodiorite occurs in the north of the study area (Kavalieris, 1984). The study was conducted using variety of approaches, including desk top study, field mapping, and data interpretation. Desktop study are focused on lineament and fault fracture density interpretation. Field mapping include observation, measurement, and structure interpretation. Gold mineralization in the prospect “X-Y” are hosted in porphyritic dacite, lapilli tuff, and diatreme breccia unit. The type of mineralization generated epithermal low sulphidation with anomalous mineralization. It has the feature of a high fault-fracture density range of 2100-3200 m/
Geotourism Potential on Geosites in Natuna Geopark Pratiwi, Prisca Nurul; Rosana, Mega Fatimah; Arfiansyah, Kurnia
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.v5i2.34904

Abstract

Natuna is a district located in the Riau Islands Province. The Natuna area, consist of several islands. The main island namely Bunguran island, where the capital city of Natuna Regency is located. The islands have several rare geological heritages that has national and international significant value. The islands also have been designated as Natuna National Geopark since 2018. The purpose of this study is to analyze the potential of geotourism in several geological site of the Natuna Geopark. The research method used is collection and data analysis from secondary data that available, The geotourism components category are used classification by Newsome & Dowling (2010). Some geological diversities are used as geosites that has potential to be development as geotourism area. The results show that several geological sites in the Natuna Geopark can be developed and used as geotourism activities including: geosite for sightseeing; geo-sports; geo-study; geo-conservation and geo-education; and geo-festival. There are 11 geosites that have the potential to develop geotourism components, including Bukit Gundul, Gunung Ranai, Tanjung Senubing, Tanjung Datuk, Pantai dan Gua Kamak, Gugus Pulau Tiga, Pulau Senoa, Bukit Kapur, Pulau Akar, Pusat Informasi Geologi, and Batu Rusia. Some of the sites are already facilitated with infrastructure for tourism.Keywords: Geotourism, Geosite, Geological Heritage, Natuna Geopark.
Kajian Genangan Bahaya Tsunami di Kawasan Pantai Palabuhanratu, Geopark Ciletuh Ar-rouf, Ferdian Budi; Rosana, Mega Fatimah; Endyana, Cipta
JURNAL GEOLOGI KELAUTAN Vol 20, No 1 (2022)
Publisher : Pusat Penelitian dan Pengembangan Geologi Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32693/jgk.20.1.2022.754

Abstract

Daerah Selat Sunda masuk dalam segmentasi Sumatera dan Jawa dari Busur Sunda, yang memiliki karakteristik sangat aktif dalam aktivitas vulkanik, kegempaan, dan pergerakan tektonik. Patahan naik busur Sunda menimbulkan Gempa bumi yang kuat hingga 8.8Mw yang dapat memicu tsunami. Kawasan Palabuhanratu masuk dalam kategori yang terdampak dalam bahaya tsunami dari Busur Sunda. Kajian pembuatan peta zona bahaya genangan tsunami model ketinggian 5 meter, 10 meter, dan 30 meter berdasarkan periode ulang tsunami dikawasn Selat Sunda. Metode penelitian dengan menggunakan data sekunder dari NASA yaitu ASTER GDEM untuk menunjukkan elevasi dan Sentinel 2B untuk menunjukkan penggunaan lahan. Tools Pengolahan data citra satelit dengan Software QGIS. Hasil kajian menunjukkan bahwa bahaya genangan tsunami dengan ketinggian 5 meter memiliki luasan keterpaparan 113,65 ha, 10 meter keterpaparan 720,27 ha, dan 30 meter sebesar 1531.78 ha. Dengan cakupan desa yang terdampak Citepus, Palabuhanratu, Jayanti, Citarik dan Tonjong.
GEOMORPHOLOGICAL ASPECT ANALYSIS IN CIKANGKUNG AND SURROUNDING AREA, CIRACAP SUBDISTRICT, SUKABUMI REGENCY, WEST JAVA Maulana, Muhammad Hafidz; Pratiwi, Santi Dwi; Rosana, Mega Fatimah
Journal of Geological Sciences and Applied Geology Vol 8, No 2 (2025): 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.v8i2.60774

Abstract

The Ciletuh–Jampang area, located in the southern part of Java Island exhibits distinct geomorphological characteristics shaped by a combination of endogenous and exogenous geological processes over an extended period. This study analyzes the geomorphology of the region using field observations and remote sensing, focusing on morphographic, morphometric, and morphogenetic aspects, specifically in Cikangkung area, Ciracap Subdistrict, Sukabumi Regency, West Java. Based on those three geomorphological aspects, this area could be divided into four different units, such as marine lowland, denudational lowland, gently sloping structural lowhills, and sloping structural lowhills. These units are formed by interactions between tectonic activity, volcanism, weathering, erosion, and sedimentation processes. Tectonic uplift, volcanic contributions, and variations in rock resistance have significantly influenced landforms, while exogenous processes have shaped terrain forms, drainage patterns, and top-soil thickness. The results reveal that these processes not only define the region's unique morphological features but also influence its diverse land use practices, including agriculture and settlements. Keyword: Geomorphology, Ciletuh-Jampang, Cikangkung, Landform, Remote Sensing
ANALYSIS OF GRAIN SIZE AND MINERALOGY OF HEAVY MINERAL GRAINS IN PALANGKA RAYA AREA, CENTRAL KALIMANTAN PROVINCE Nurzakiyah, Halimah; Rosana, Mega Fatimah; Sunarie, Cecep Yandri; Ernowo, Ernowo
Journal of Geological Sciences and Applied Geology Vol 8, No 2 (2025): 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.v8i2.58052

Abstract

The Palangka Raya area is situated on the island of Borneo, specifically within the Central Kalimantan province. The study area is composed of a lithological sequence comprising fine-coarse quartz sandstone and cross-layered conglomerate, with components in the form of malleable and granitic rocks from the Dahor Formation (TQd) and alluvium deposits. This sequence has the potential for heavy mineral deposits associated with sedimentary sands. This study aimed to calculate and identify grain size and heavy mineral content distribution within the investigated area. The research was conducted using a combination of grain size analysis and grain mineralogy analysis on six mesh numbers. The results of the grain size analysis indicate that the majority of samples exhibit grain sizes within the mesh numbers -10+18 and -60+140. The results of the grain mineralogy analysis revealed the presence of heavy minerals, including cassiterite, hematite, biotite, chalcopyrite, zircon, rutile, ilmenite, garnet, amphibole, and staurolite. Heavy mineral variations were observed on mesh numbers -60+140 and <140. These minerals are believed to have originated from metamorphic rocks, S-type granitic rocks, and I-type granitic rocks.
MINERALOGY AND SEDIMENT DISTRIBUTION BASED ON GRAIN SIZE ANALYSIS IN THE KAPUAS AREA, CENTRAL KALIMANTAN Diwantara, Raja Hertansyah; Rosana, Mega Fatimah; Sunarie, Cecep Yandri; Ernowo, Ernowo
Journal of Geological Sciences and Applied Geology Vol 8, No 2 (2025): 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.v8i2.58054

Abstract

The Kapuas region in Central Kalimantan exhibits intriguing geological potential due to the presence of a large river and sediment flows closely associated with fluvial activity. This study aims to identify the distribution of sediment grain sizes and the presence of heavy minerals in the study area. Sediment sampling locations were identified at four points using shallow drilling techniques, specifically with a hand auger. The research methods employed include grain size analysis (granulometry) and grain counting analysis using polarized microscopy. The results indicate that the grain sizes in the study area range from coarse to fine sand. The sediment transport mechanism occurs as bedload for coarse-sized sediments and in suspension for fine-sized sediments. The mineralogical composition of sediments in the study area contains heavy minerals such as rutile, ilmenite, cassiterite, biotite, hematite, zircon, and chalcopyrite. The varied mineral content reflects a source material origin from acidic to intermediate igneous rocks and metamorphic rocks. This indicates a complex and dynamic geological history in the region.
Co-Authors Achmad Noerkhaerin Putra Achmad Rizal Adi Hardiyono, Adi Adjat Sudradjat Adjat Sudrajat Agus Didit Haryanto -, Agus Didit Haryanto Akhmad Fauzan Alamsyah, Irpan Almun Madi Andi Kurniawan Angga Syahputra, Muhammad Eko Ar-rouf, Ferdian Budi Arie Noor Rakhman Asri Arifin Asrial, Nouval Muamar Aton Patonah, Aton Azzaenuri, Mohammad Fachri Bahtiar, Wisnu Indra Bensaman, Benny Boy Yoseph Cahya Sunan Sakti Syah Alam Cecep Yandri Sunarie, Cecep Yandri Chiyonobu, Shun Cipta Endyana Dicky Muslim Diwantara, Raja Hertansyah Eko Tri Sumarnadi Agustinus Emi Sukiyah Ernowo Ernowo Euis Tintin Yuningsih Fachrudin, Kurnia Arfiansyah Fadhlurrohman Putrananda, Aditya Faizal, Reza Mochammad Faizal, Reza Mochammad Faurine, Nurul Rizma Fitriany, Ria Fivry Wellda Maulana Hafidhah Nurul Haq Heriawan, Mohammad N Hernadi, Deni Heru Sigit Purwanto Hill Gendoet Hartono Hiroharu Matsueda Ildrem Syafri Indra Kusuma, Riko Ardiansyah Indrakususma, Riko Ardiansyah Indrakususma, Riko Ardiansyah Ismail, Fajar Iyan Haryanto, Iyan Johanes Hutabarat Kamaruddin, Hashari Kamaruddin, Hashari Kemala Wijayanti, Kemala Khoerunisa, Resa Kurnia Arfiansyah, Kurnia Lia Jurnaliah Lili Fauzielly Marbun, Ardiansyah Maulana, Muhammad Hafidz Meiriyanto, Fernandy Mohamad Nur Heriawan Muhammad Hery Setiyawan Nana Sulaksana Nordin, Nazihah Nugraha, Katon Sena Ajie Nurahmah, Siti Chusnul Chatimah Nurzakiyah, Halimah Pradnya Paramarta Raditya Rendra Pratiwi, Prisca Nurul Purwaiswanto, Bambang Antoro Putri, Nisrina Nadellia Raden Isnu Hajar Sulistyawan, Raden Isnu Hajar Rangga Suteja, Rangga Rezky, Yuanno Rezky, Yuanno Ridho Kresna Wattimena Ridho Kresna Wattimena, Ridho Kresna Rinawan, Fiandri Indragunawan Rinawan, Fiandri Indragunawan Rompo, Ahmad Iryanto Rompo, Iryanto Ruswanto, . Santoso, STJ Budi Saputra, Dwie H. Sentosa*, Millati Amalia Soepriadi, Soepriadi Soepriadi, Soepriadi Sukaesih Sukaesih, Sukaesih Sukardan Tawil SUMARWAN, FIRMAN Suwandhi, Awang Suwandhi, Awang SYAH, MOHAMAD AKBAR Tampubolon, Armin Undang Mardiana Wibowo, Setiyo Widyariestha, Mira Winantris Winantris Wirdan, Muhammad Faisal Yanuar, Yerry Yuningsih, Euis Tintint Zakaria, Zulfiadi Zuzy Anna