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All Journal Bulletin of Scientific Contribution : Geology Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir Journal of Geoscience, Engineering, Environment, and Technology Journal of Environmental Science and Sustainable Development Journal of Geosciences and Applied Geology
Haryadi Permana
Research Center for Geotechnology LIPI, Bandung,
Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Energy Engineering Environmental Science Physics Social Sciences

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Karakteristik Intensitas Radioaktivitas Batuan dan Sedimen Terpilih di Pantai Sedau, Kalimantan Barat Aryanto, Noor Cahyo Dwi; Suparka, Emmy; Permana, Haryadi
Eksplorium Buletin Pusat Teknologi Bahan Galian Nuklir Vol 36, No 2 (2015): November 2015
Publisher : Pusat Teknologi Bahan Galian Nuklir - BATAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (30.019 KB)

Abstract

Intensitas pancaran unsur radioaktif berdasarkan data aktivitas batuan dan aktivitas pancaran ß serbuk di Pantai Sedau dilakukan menggunakan metode analisis Spektrometer Gamma dan alat cacah ß terhadap sembilan contoh sedimen dan batuan. Intensitas radioaktif batuan memperlihatkan kisaran U238 dari 0,1202 ± 0,008 Bq/25gr hingga 0,4348 ± 0,005 Bq/25gr;  Th232 0,0768 ± 0,005 Bq/25gr hingga 0,4812 ± 0,015 Bq/25gr; sedangkan intensitas gross gammanya berkisar dari 1,0503 ± 0,029 Bq/25gr  hingga 5,6433 ± 0,273 Bq/25gr. Semua contoh yang memiliki intensitas unsur radioaktif untuk aktivitas batuan tinggi berasal dari batuan yang sama (monzogranit), yaitu di lokasi SKP08-04. Hasil yang sama pada pancaran ß serbuknya yang memperlihatkan aktivitas  ß gross tertinggi juga terjadi di lokasi SKP08-04 pada batuan monzogranit dengan intensitas paparan 0,370 ± 0,025 Bq/25gr. Berdasarkan pengamatan petrografi, monzogranit di SKP08-04 memperlihatkan pelimpahan feldspar dengan kondisi yang relatif belum teralterasi sedangkan berdasarkan analisis geokimia memperlihatkan afinitas berupa seri kalk-alkali yang tinggi potasium. Kata kunci: intensitas pancaran radioaktif, aktivitas batuan, paparan serbuk, monzogranit, Pantai Sedau
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.
RIVER MEANDERS ON ALLUVIAL PLAINS AND HILLY TOPOGRAPHY Raharjo, Puguh Dwi; Haryono, Eko; Setiawan, Muhammad Anggri; Permana, Haryadi
Journal of Environmental Science and Sustainable Development Vol. 6, No. 1
Publisher : UI Scholars Hub

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Abstract

Previous research on meandering rivers in Indonesia, precisely in Java, has predominantly focused on alluvial plains, while their presence is also observed in hilly regions with rocky substrates. The study aims to investigate different meandering types in Java and establish regional connections between these types and geological and geomorphological processes. The methodology involves identifying high-resolution remote sensing images and topographic data, followed by analysis based on geological and geomorphological developments. To categorize the rivers, sinuosity ratios are meticulously calculated. The tectonic setting, which influences physiography and geomorphology, is an analytical unit for determining the meandering process. The result reveals that meandering rivers are primarily located in the alluvial plains of northern Java. Meanwhile, meandering rivers in hilly areas are concentrated in structural formations, predominantly in southern and central Java. In alluvial plains, meandering rivers display a regular pattern with higher concentrations of curvature downstream, and their substrates consist of deposits or soil. Conversely, meandering rivers in hilly regions exhibit irregular and winding patterns, randomly distributed from upstream to downstream. These rivers are situated in the physiographic regions of Southern Mountains, Hills in Central Depression, and Kendeng Hills, and their substrates mainly comprise rocks, leading to a more protracted process of curvature transformation. In conclusion, meandering rivers in Java can form not only in alluvial plains but also in hilly areas. Meanders on hilly topography possess higher sinuosity ratios than those on alluvial plains, displaying irregular patterns. Energy minimization alone is not the sole controlling factor; the physical surface conditions also play a significant role, particularly in meanders in hilly areas, resulting in a diverse typology of meanders. Therefore, understanding the formation of meandering rivers in various topographic regions can serve as a basis for policymaking, particularly in flood mitigation and riverbank erosion management.
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
ALTERASI MINERALISASI GRANODIORIT CIHARA DAN SEKITARNYA, KABUPATEN LEBAK, BANTEN Patonah, Aton; Permana, Haryadi; Rosyid, Vendi Hakim Ar; Ramadhan, Taufik
Bulletin of Scientific Contribution Vol 18, No 3 (2020): 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.v18i3.30930

Abstract

Penambangan emas di Cihara dan sekitarnya yang dilakukan oleh masyarakat setempat menarik untuk diteliti, karena keberadaan emas semakin berkurang, khususnya pada granodiorit, Ketika dilakukan penambangan semakin dalam.  Tujuan penelitian ini adalah untuk mengidentifikasi karakteristik alterasi dan mineralisasi serta tipe endapan dengan pendekatan observasi lapangan dan analisis laboratorium, yaitu petrografi, mineragrafi dan AAS.  Hasil menunjukkan bahwa alterasi di daerah penelitian dibagi menjadi 3 (tiga) zona; (1) zona serisit – klorit – epidot – kuarsa – karbonat (2) zona kuarsa – karbonat – klorit – serisit - biotit (3) zona klorit – karbonat – kuarsa – serisit. Lebih lanjut lagi, mineralisasi yang tersingkap di daerah ini didominasi oleh pirit, sfalerit, galena, sebagian kecil hadir mineral kalkopirit, kovelit dan emas. Logam dasar umumnya terdapat pada urat kuarsa bersama dengan emas; sementara pada granodiorit (disseminasi), jumlahnya berkurang. Hal ini ditunjukkan dengan data hasil assay bahwa kadar logam dasar dan emas relatif lebih tinggi pada urat kuarsa dibandingkan pada tekstur disseminasi. Berdasarkan data – data tersebut, jenis endapan di daerah tersebut memiliki kemiripan dengan endapan porfiri yang berasosiasi dengan karbonat – logam dasar.
Co-Authors Ahnaf, Jemi Saputra Alamsyah, Fadhli Aton Patonah, Aton Eko Haryono Emmy Suparka, Emmy Ismawan Ismawan, Ismawan Noor Cahyo Aryanto Puguh Dwi Raharjo Rosyid, Vendi Hakim Ar Setiawan, Muhammad Anggri Taufik Ramadhan