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All Journal Bulletin of Scientific Contribution : Geology Journal of Geoscience, Engineering, Environment, and Technology Buletin Sumber Daya Geologi Jurnal Geominerba Journal of Geosciences and Applied Geology
Aton Patonah, Aton
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Structure and Tectonic Reconstruction of Bayah Complex Area, Banten Ahnaf, Jemi Saputra; Patonah, Aton; Permana, Haryadi; Ismawan, Ismawan
Journal of Geoscience, Engineering, Environment, and Technology Vol 3 No 2 (2018): JGEET Vol 03 No 02 : June (2018)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2167.168 KB) | DOI: 10.24273/jgeet.2018.3.2.1554

Abstract

The research aimed to reconstruct the geological structures and tectonics of the Bayah complex area. The structures found that grouped into regional structural patterns used to determine the ages and the events that responsible to its formation. The methods used in this research include field and studio method. Field method carried out to map the outcrops and record geological structures data using geological compass, GPS, tape measurement, and geological hammer, while studio method performed to process and analyze data using software such as Win Tensor, Dips, MapInfo Professional 10.5 and CorelDraw X4. The geological structure of the Bayah has varying patterns and ages. The fracture patterns show N-S and E-W direction which is belong to Sundanese and Java Pattern formed in range of the Early Eocene to Pliocene. While the faults that have direction of SW-NE and E-W are classified into Meratus and Java Pattern. However, metamorphic rock foliations show NW-SE and N-S direction that belonging to the Pre-Tertiary Sumatra Pattern. The three faults of this research are estimated to be formed by the effect of orogenesis that occurring in different events and ages. JSA-014 fault is predicted to form due to orogeny I or orogeny II in the Early Oligocene - Middle Miocene, this fault classified as the 2nd order right lateral wrench fault. JSA-034 fault is formed by orogeny I in Early Oligocene - Middle Miocene, this fault is also classified as the 2nd order right lateral wrench fault. While JSA-080 fault has relatively young age that formed due to orogeny III in the Middle Miocene - Pliocene and belonging to the 3rd order left lateral wrench fault.
UMUR BATUAN SEDIMEN ANGGOTA CIKARANG FORMASI JAMPANG DI SUNGAI CIGANGSA, KECAMATAN SURADE, KABUPATEN SUKABUMI BERDASARKAN NANNOFOSIL GAMPINGAN Ramdhani, Muhammad Alfi Gilang; Pratiwi, Santi Dwi; Patonah, Aton
Bulletin of Scientific Contribution Vol 22, No 1 (2024): Bulletin of Scientific Contribution : GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/bsc.v22i1.54443

Abstract

Penelitian dilakukan pada batuan sedimen yang tersingkap di Sungai Cigangsa, Kecamatan Surade. Singkapan ini merupakan bagian dari Anggota Cikarang Formasi Jampang dengan susunan singkapan batuan di lapangan berupa batupasir dalam berbagai ukuran butir dan ketebalan dan batulempung. Secara stratigrafi, di bagian atas dan bawah disusun oleh batupasir karbonatan dengan ketebalan bervariasi antara 10 sampai 45 cm. Di bagian tengah disusun oleh batulempung dengan ketebalan 3 sampai 32 cm. Penelitian bertujuan untuk mengidentifikasi umur relatif batuan sedimen Anggota Cikarang Formasi Jampang di Sungai Cigangsa dengan menggunakan metode measuring section dan analisis nannofosil gampingan secara semi kuantitatif. Sebanyak 36 spesies nannofosil telah diidentifikasi dari 47 sampel batuan sedimen yang telah diamati dengan preparasi nannofosil metode smear slide. Enam datum marker spesies nannofosil yang dapat digunakan untuk rekonstruksi biostratigrafi dari tua ke muda yaitu kemunculan akhir Sphenolithus ciperoensis (Zona NP25), kemunculan akhir dari Cyclicargolithus abisectus (Zona NN1), kemunculan awal Sphenolithus disbelemnos (Zona NN2/NN1), kemunculan awal Sphenolithus belemnos (Zona NN3/NN2), kemunculan umum akhir dari Sphenolithus belemnos (Zona NN4/NN3), dan kemunculan umum awal Sphenolithus heteromorphus (Zona NN4). Dapat disimpulkan bahwa Anggota Cikarang Formasi Jampang memiliki rentang umur NP25-NN4 (Oligosen Akhir – Miosen Awal).
KARAKTERISTIK UNSUR TANAH JARANG (LTJ) LANTANUM DAN CERIUM PADA LAPUKAN GRANIT DI DAERAH PARMONANGAN Musyaffa, Muhammad Ayyasy; Patonah, Aton; Faisal, Reza Mochammad
JURNAL GEOMINERBA (JURNAL GEOLOGI, MINERAL DAN BATUBARA) Vol 9 No 1 (2024): Jurnal Geominerba - 2024
Publisher : PPSDM Geominerba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58522/ppsdm22.v9i1.157

Abstract

As a critical mineral category, the demand for rare earth metals (LTJ) has increased significantly. Rare earth metals, Lanthanum (La) and Cerium (Ce), are utilized in a variety of contemporary technologies. Rare earth elements such as La and Ce are present in rare earth element-bearing minerals and can be found in granitoid-weathered deposits. The purpose of this study is to determine the characteristics of La and Ce elements conttained in ion adsorption deposits resulting from the weathering of granite boulders, as well as their relationship to other chemical elements. In this study, acid igneous rock weathering samples obtained from drilling in Parmonangan District, North Tapanuli Regency, North Sumatra were analyzed to identify La and Ce element-bearing minerals, enrichment zones, and types of rare earth element deposits. La is enriched in the rare earth element accumulation zone of the ion adsorption precipitate model, while Ce is enriched in the leaching zone, according to the findings of the investigation. This occurs as a result of the movement of La element during weathering, which is then bound by alteration minerals such as kaolinite. As a result of the oxidation process in the rare earth element leaching zone, the element Ce has a distinct ion value, resulting in limited mobility.
GEOLOGICAL STRUCTURE OF CITUNDUN AND SURROUNDING CIWARU DISTRICT, KUNINGAN REGENCY, WEST JAVA PROVINCE Arfiansyah, Kurnia; ICHSAN, MUHAMAD; Patonah, Aton
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.v6i1.45212

Abstract

Based on the Regional Geological Map of the Majenang sheet (Kastowo and Suwarna, 1996), the study area is part of the Halang Formation and the Bogor Zone (Van Bemmelen, 1949). Research conducted using the geological mapping method shows that the Citundun area and its surroundings have complex geological and tectonic structural conditions.The geological structures that develop are folds, joints and faults. The fold structure in the study area occurs during the Miocene – Pliocene transition with the main axis of the fold trending relatively northwest – southeast where from north to south, namely the Karangkancana Anticline, Kaduagung Syncline, Kaduagung Anticline, Cipari Syncline, Cipari Anticline, Sagara Syncline, Sagara Anticline, Jabranti Syncline, and Jabranti Anticline.Based on joint processing data and structural lineaments, the lineament results trending northwest-southeast and southwest-northeast. Joint structures are found in carbonate sandstones and carbonate claystones with hard and rather hard levels of hardness. In the study area, there are two strike slip fault structures, namely Sagara Sinistral Strike Slip Fault and Cipari Dextral Strike Slip Fault which are trending northeast-southwest. From the results of joint data analysis, a fault indication was withdrawn because the distribution of joint directions was supportive. Based on the regional tectonic age of West Java, during the Miocene - Pliocene the fault in the study area occurred after deposition of sandstone unit (Sbpn), carbonate claystone unit (Sblk) and carbonate sandstone unit (Sbpk) so that this fault structure is interpreted to be Pliocene in age. Referring to the concept of Moody and Hill (1956), the faults in the study area are strike slip faults of the first and second order.Keywords: Citundun, Geological Structure, Syncline, Anticline, Strike Slip Fault.
CHARACTERISTICS OF VOLCANIC ROCK CIKOTOK FORMATION AT CIHARA AND SURROUNDING AREA, LEBAK DISTRICT, BANTEN PROVINCE Patonah, Aton; Permana, Haryadi; Alamsyah, Fadhli
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.v4i1.29044

Abstract

Volcanic rock of Cikotok Formation in southern part of the Bayah Dome, known as old andesite volcanic, is one of the parent rocks contain gold and base metal mineralization. This study aims to identify in more detail about texture, structure, and composition of mineral constituents of the rock by using field observation and petrographic methods. The result shows that the volcanic rocks of Cikotok Formation were came from shallow eruptions and relatively rapid cooling characterized by trachytic to porphyritic texture, embayment, and amygdaloidal structure. Most of these rocks have altered. These altered rocks are believed related to deformation at Oligo-Miocene that causing the presence of weak zone so that hydrothermal fluid can passes through
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. 
FLOOD POTENTIAL IN THE DOWNSTREAM OF CITARUM RIVER, MUARA GEMBONG, BEKASI DISTRICT, WEST JAVA Patonah, Aton; Tresnasari, Endah; haryanto, edi tri; rendra, pradnya p. raditya; sabily, zulfa; sukiyah, emi; sulastri, murni; abdurrohman, Muhammad jihad; putera, alvindo andreansyah; Subagja, Agam; ridwan, panji
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.v3i3.26013

Abstract

The flood can affect an area so cause great loss. Muaragembong is one of the sub-districts in Bekasi Regency. This area is known as an area that is regularly hit by floods. The purpose of this study is to analyze changes in flood areas, specifically those related to residential areas. The results showed significant changes in the flood area from 1993 to 2016. Increased changes in land use from swampy areas and mangrove forests to residential areas are thought to be the cause of the increase in flooding every year. One way to reduce the impact of flooding in Muaragembong is to restore the existence of mangrove forests along the Citarum River to the sea.Keywords: Flood, Muara Gembong, Citarum River, Land Use
EVOLUSI METAMORFISME METAVOLKANIK DI DAERAH CIGABER DAN SEKITARNYA, KABUPATEN LEBAK Patonah, Aton; Alfadi, Muhammad Kurniawan
Bulletin of Scientific Contribution Vol 22, No 3 (2024): Bulletin of Scientific Contribution : GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/bsc.v22i3.59074

Abstract

Penelitian dilakukan di daerah Cipeundeuy dan sekitarnya, Kabupaten Lebak dengan tujuan untuk mengidentifikasi karakteristik metavolkanik dengan pendekatan inklusi fluida primer yang terjebak pada mineral kuarsa. Hasil penelitian menunjukkan bahwa metavolkanik tersusun atas sekis biotit klorit dan sekis klorit yang diduga berasosiasi dengan burial metamorphism, dicirikan dengan kehadiran struktur milonit, eye’s texture, dan relik tekstur plagioklas sebagai jejak protolith vulkanik. Selanjutnya, hasil identifikasi inklusi fluida primer yang terjebak dalam kuarsa memperlihatkan cluster dan trail texture diduga berasosiasi dengan syn-metamorphism dari awal - akhir metamorfisme sampai ekshumasi. Adapun komposisi fluida didominasi oleh dua fase likuid+gas dan 1 fase tunggal berupa likuid, semuanya berasal dari air metamorfik. Hasil pengukuran mikrotermometer menunjukkan bahwa temperatur pembentukan metavolkanik, sekis biotit klorit, pada 310°C - 340°C dan tekanan 92,64 Bar - 113,34 Bar dengan kedalaman sampai 1.377,81 meter. Batuan ini mengalami penurunan derajat metamorfismenya sampai 233oC dengan tekanan sampai 13.47 Bar. Ini menunjukkan bahwa batuan tersebut diperkirakan terangkat sampai kedalaman 45.24 meter. Hal ini didukung dengan kehadiran struktur brittle berupa urat yang diisi oleh epidot, klorit, dan kuarsa sebagai hasil dari pos metamorfisme; dan penggantian biotit oleh klorit pada batuan metavolkanik. 
IDENTIFICATION OF MASS MOVEMENT VULNERABILITY ZONES USING STORIE METHOD IN BARUNAI AND SURROUNDING AREAS, LEBAK REGENCY, BANTEN PROVINCE Hutauruk, Gita Agnes Meilani; Yuningsih, Euis Tintin; Patonah, Aton; Arfiansyah, Kurnia
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.v8i2.58072

Abstract

Natural processes cause mass movement when slope materials, such as soil, rock, and mixed materials, shift from their original positions in a vertical, horizontal, or inclined orientation. A number of factors, including a relatively steep slope, the status of the rock or soil that forms the slope, intense rainfall, unchecked human activity that exploits the environment, and the state of geological structures, contribute to the movement. The research site is located in Cihara District, Lebak Regency, Banten Province, specifically in the Barunai area. Because of their proximity to fault lines and subduction zones, these study areas are susceptible to mass movement, particularly during the wet season. The goal of this study is to pinpoint the regions that are most vulnerable to mass movement. By determining the parameter that is thought to influence mass movement, the Storie method is one technique used to pinpoint the places that are vulnerable to it. The parameters include factors like land usage, type of soil, rainfall, slope, lithology, and geological structures. The research locations are categorized into two levels of mass movement vulnerability based on the analysis result: high, as much as 34.1%, and moderate as much as 65.9%, across the entire research region.
BASEMENT KOMPLEK BAYAH, KABUPATEN LEBAK, PROPINSI BANTEN Patonah, Aton; Helmi, Faisal; Prakoso, Jodi; Widiaputra, Taufiq
Bulletin of Scientific Contribution Vol 13, No 3 (2015): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1254.822 KB) | DOI: 10.24198/bsc.v13i3.8405

Abstract

Researching metamorphic rocks in Bayah and in its surrounding area has slight data so it has not been clear yet how the stratigraphic position, the age and the metamorphic rocks characteristic is in the study area. By using geological mapping and petrographic method, it showed that the metamorphic rock is believed to be the basement of Bayah complex which accreted because of reverse fault in the northwest so that the rock appeared together with the relatively younger rocks in the south (Bayah Formation and Granodiorite Cihara). These rocks showed that there are foliation, boudinage and crenulation structure consisting of various types of metamorphic rocks which are different in degrees of metamorphism (low grade – high grade metamorphism) and in protoliths as well, so these interpret as a result of orogenic processes of intermediate pressure metamorphism.
Co-Authors abdurrohman, Muhammad jihad Adi Hardiyono, Adi Agung Mulyo Ahnaf, Jemi Saputra Alamsyah, Fadhli Alfadi, Muhammad Kurniawan Anna Yushantarti, Anna Asep Nurdin, Asep Bahtiar, Wisnu Indra DEWI FITRIANI Edi Tri Haryanto, Edi Tri Emi Sukiyah Euis Tintin Yuningsih Fadilah, Rizqi Faisal Helmi Faisal, Reza Mochammad Fauzi, Ridwan Nur Fazillah Adzka, Fazillah Haryadi Permana Hirose, Kazuyo Hutauruk, Gita Agnes Meilani Ichsan, Muhamad Ildrem Syafri Imaniar, Nurul Ismawan Ismawan, Ismawan Iyan Haryanto, Iyan Jodi Prakoso, Jodi Kurnia Arfiansyah, Kurnia Matano, Alan Maulana, Muhammad Hafidz Mega Fatimah Rosana Muhammad Nur Hadi Musyaffa, Muhammad Ayyasy Pradnya P. Raditya Rendra Pradnya Paramarta Raditya Rendra Prambada, Oktory putera, alvindo andreansyah Ramdhani, Muhammad Alfi Gilang Ridwan, Panji Riza Asyari Yamin, Riza Asyari Rosyid, Vendi Hakim Ar sabily, zulfa Siahaan, Yakub Silalahi, Natha Nuel Simarmata S. L. Robertus, Simarmata S. L. Subagja, Agam Sulastri, Murni Taufik Ramadhan Taufiq Widiaputra, Taufiq Tresnasari, Endah Trisusanti, Eliana Vanessa, Agata Vijaya Isnaniawardhani Yuano Rezky, Yuano Yusuf, Muhammad Farhan Zufialdi Zakaria, Zufialdi