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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 Kumawula: Jurnal Pengabdian Kepada Masyarakat Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources) Journal of Geosciences and Applied Geology

Iyan Haryanto, Iyan

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Author-ID : 525629

Chemistry Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Physics Social Sciences

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TEKTONIK SESAR CIMANDIRI, PROVINSI JAWA BARAT Haryanto, Iyan; Hutabarat, Johanes; Sudrajat, Adjat; Ilmi, Nisa Nurul; Sunardi, Edy
Bulletin of Scientific Contribution Vol 15, No 3 (2017): Bulletin of Scientific Contribution:GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

ABSTRACTCimandiri fault formed during stage II orogenesis is the oldest fault at the end of the middle Eocene. The Cimandiri fault is the active fault that developed a paleo high and uplifted the Ciletuh Formation within front arc basin. The stage III orogenesis at the Late Eocene indicated by regional compression in the Java that affected to reactivation fault. This fault known to be the same as the Baribis thrust fault. Finally, the compression tectonic decreased that it created the normal fault on Cimandiri thrust-fold. Therefore, we can define the Cimandiri fault into two regional fault patterns. The first pattern, the thrust fault that indicated by high bedding inclined. The second pattern, the next pattern is the normal fault that revealed by fault scarps inclination more than 50o or even vertical in some locations. Keywords: Cimandiri fault, front arc basin, Ciletuh valley, Cimandiri Valley. ABSTRACKSesar Cimandiri merupakan sesar tua yang terbentuk selama berlangsungnya orogenesa tahap II, yaitu pada waktu Akhir Eosen Tengah. Pada saat itu batuan sedimen Formasi Ciletuh berumur Eosen Tengah yang terbentuk di dalam Cekungan Depan Busur sudah terangkat ke permukaan. Sesar ini terus aktif hingga menyebabkan terbentuknya tinggian purba (paleo-hight) antara Lembah Ciletuh dan Lembah Cimandiri. Pada Akhir Tersier, tektonik kompresi kembali terjadi, menyebabkan untuk ketiga kalinya sesar Cimandiri teraktifkan kembali sebagai sesar naik. Peristiwa ini disimpulkan sebagai orogenesa ke III di Pulau Jawa. Salah satu struktur sesar regional yang terbentuk pada saat itu adalah Sesar Baribis. Setelah tektonik kompresi berkurang terjadi kesetimbangan menyebabkan terbentuknya sesar normal pada jalur lipatan anjakan Cimandiri. Oleh karena itu, Sesar Cimandiri terdiri atas dua sesar regional yang pertama sebagai sesar naik yang dicirikan oleh deformasi lipatan batuannya yang umumnya tegak, dan sebagai sesar normal yang dicirikan dengan terbentuknya gawir sesar dengan kemiringan di atas 50° bahkan di beberapa lokasi mendekati vertical. Kata Kunci: Sesar Cimandiri, Cekungan Depan Busur, Lembah Ciletuh, Lembah Cimandiri.

DEBIT ALIRAN (WATER YIELD) SUB-DAS CIGUMENTONG DAN CIMULU SUB-DAS CITARIK BAGIAN PALING HULU Haryanto, Edi Tri; Nur, Andi Agus; Haryanto, Iyan; Yuniardi, Yuyun
Bulletin of Scientific Contribution Vol 13, No 2 (2015): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Cigumentong and Cimulu sub-watersheds are growing at vokanik denudasional landform with geological formations of undeferienciated old volcanic product consists of tuff , breccia and lava of the uppermost of Citarik Sub-Catchment . Based on the order system according to Strahlaar both river is a river -order 4 , with the land cover of relatively dense forest vegetation with an area of 552 Ha respectively and 606 Ha . This study aims to investigate the flow discharge characteristics of the two rivers by measuring daily and daily rainfall during the period 20 December 2014 through to March 2015, or for 71 days . The research result is fluctuations in flow discharge rate between the River Cigumentong and Cimulu tend to be similar . Inlfiltration coefficient of Cimulu sub-watersheed was slightly larger (0.54)than that was Cigumentong sub-watersheed (0.53), with the infiltration thickness of 695 mm for Cimulu and 577 mm for Cigumentong. Runoff coefficient Cimulu sub-watersheed is larger (0.44) than Cigumentong (0.37) .

IDENTIFIKASI STRUKTUR GEOLOGI BERDASARKAN ASPEK MORFOLOGI, STRATIGRAFI, POLA JURUS LAPISAN BATUAN DAN SEBARAN BATUAN : STUDI KASUS DAERAH BANTARUJEG-MAJALENGKA, PROVINSI JAWA BARAT Haryanto, Iyan; -, Nurdradjat; Saputra, Irdanto
Bulletin of Scientific Contribution Vol 13, No 2 (2015): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

The study is located at Bantarujeg, Majalengka, West Java where tertiary sedimentary rocks are exposed. The depositional environment is concluded as shallow marine – deep water. In a present day, the sedimentary rocks are deformed and create a steep hills extending from west – east of the study area as a result of fault and folding processes. In some of the study area, deformed sedimentary rocks feature is resulted by sedimentation processes called slump. Various deformation model and interpretation on study area is often confuse geological history interpretation of study area. The main cause of folding in the study area may be adjacent to sedmentation processes or tectonic processes.The study is based on structural interpretation on topography map, drainage pattern, and digital elevation model analysis (DEM). Field observation is conducted to measure structural feature and identify sedimentology and morphology aspects.Structural geology Bantarujeg is expressed by steep hills morphology extending from west – east. The morphology is controlled by rock strike with rock dip measured from 30o-60o. In the middle of the depression (valley), layer dip generally above 40o shows the area is a result of compression and related to reverse fault. Local fold and drag fold is also founded on the reverse fault zone and in other location slump structure and local drag fold also identified. In general, the study area is a result of compression tectonic regime creating fold and thrust belt followed by tear fault deformation.

THE VOLCANIC DEPOSIT WEATHERED PRODUCT IN JATINANGOR AREA, WEST JAVA Sophian, Raden Irvan; Abdurrokhim, .; Haryanto, Iyan; Hendarmawan, .
Bulletin of Scientific Contribution Vol 15, No 2 (2017): Bulletin of Scientific Contribution GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

ABSTRAKPembangunan di Kawasan Jatinangor dalam beberapa waktu ini telah mengalami perkembangan yang cukup pesat. Jatinangor adalah daerah baru yang dikembangkan untuk Pendidikan dari beberapa kampus seperti Unpad, ITB, IKOPIN, dan IPDN. Hal ini menyebabkan peningkatan jumlah penduduk tiap tahunnya dan juga menyebabkan berkembangnya infrastruktur untuk mendukung kegiatan Pendidikan di daerah ini. Untuk mengetahui hambatan dan menghindari terjadinya bencana alam di masa depan, maka harus dipahami perilaku tanah permukaan sebagai pondasi bangunan berbagai sarana prasarana. Metode penelitian meliputi pemetaan geologi teknik, pengambilan sampel tanah tidak terganggu, uji tes pit, analisis sifat petrologi atau batuan. Kondisi Geologi daerah ini terdiri dari produk vulkanik muda yang tidak terpisahhkan, yang terdiri dari breksi tufan, tuf, lahar, tuf lapilli, dan abu vulkanik yang berumur kuarter (kurang dari 2 Ma). Kondisi geomorfologi daerah ini terdiri dari dataran hingga perbukitan landai di selatan Gn. Manglayang. Berdasarkan hasil penelitian, kawasan Jatinangor memiliki distribusi tanah terdiri dari lanau hingga lempung berplastisitas tinggi (MH dan CH). Kondisi ini menyiratkan produk vulkanik yang tidak terkonsolidasi dan tanah residu semi-konsolidasi sebagai produk pelapukan dari ash dan alterasi dari tuff. Kata Kunci: Jatinangor, Sifat Fisik Tanah, Tuff, Material Vulkanik Muda belum Terpisahkan ABSTRACTThe development of jatinangor area in recent time has experienced a very rapid development. Jatinangor is the new location for Education area from several campuses such as Unpad, ITB, IKOPIN, and IPDN. This results in an increase in the number of population each year and also led to a growing development of infrastructure to support educational activities in this area. To know the obstacles and avoid the occurrence of natural disasters in the future, it should be understood the behavior of surface soil as the building foundation of various infrastructure facilities. The research method includes engineering geologic mapping, undisturbed soil sampling, test pit, petrologic or rock properties analysis. The geology of this area consists of undifferentiated young volcanic product (Qyu), containing tuffaceous breccia, tuff, lava, lapilli tuff, and volcanic ash. This product is deposited on Quaternary geologic age (less than 2 Ma). The geomorphology of this area consists of plain to hilly land at the south of Mount Manglayang. Result of this study shows that around Jatinangor area the distribution of soils consists of high plasticity silt and clay (MH and CH). This condition implies to semiconsolidated-nonconsolidated volcanic product and semi-consolidated residual soil as the weathering product of ash and tuff alterations. Keywords: Jatinangor, physical properties soil, tuff, undifferentiated young volcanic product

POLA STRUKTUR REGIONAL JAWA BARAT Helmi, Faisal; Haryanto, Iyan
Bulletin of Scientific Contribution Vol 6, No 1 (2008): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Regional structure of West Java influenced by interaction of subduction between India-Australia plate with Eurasia plate. Effect of this subduction, in West Java expand some fault structure which devide to 4 faults, that is north-south faults, northwest-southeast faults, and northeast-southwest faults.Fault of North-South which devide into Sunda Pattern, is representing oldest fault and forming of Paleogen Basin in West Java. Stress system of Sunda Pattern is influenced by transtensional tectonic and as a whole form structure pattern of negative structure flower.Change of tectonics in West Java take place at Plio-Plistosen period. At that moment system of stress influenced by tectonic compression yielding fold structure of wast-east thrust-fault (Java Pattern). At same tectonic period, formed a number of northwest-southwest strike-slip fault (Sumatera Pattern) and northeast-southwest strike-slip fault (Meratus Pattern).

STUDI GEOLOGI DAN GEOFISIKA POTENSI HIDROKARBON FORMASI AIR BENAKAT LAPANGAN X CEKUNGAN SUMATERA SELATAN Simorangkir, Fenry; Haryanto, Iyan; -, Nurdrajat; Firmansyah, Yusi
Bulletin of Scientific Contribution Vol 13, No 1 (2015): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

X field is part of the South Sumatra Basin with an area of 359,6 km2. This study is focused to discuss potential hydrocarbons in x fiels. In this study, the discussion will be focused on the Air Benakat Formation. The method used is based on the interpretation of seismic and well. Based on the results of the analysis of the petrophysic of the FS, HA, and BS well shows average Netpay on Air Benakat Formation is 180 m, with a cut-off Volume Shale 0.4, cut-off PHIE 0.12 and cut-off Saturation Water 0.71. As for the Netpay from reservoir itself is average 12.415 m. Geological modeling based on the results obtained by petroleum leads three zone with two reservoir zones. For reservoar A, the most potentially zone is the zone of Lead-1 with with a resources amount of 716.82 MMBO, Zone of Lead-2 with a resources amount of 398.89 MMBO, and zone of Lead-3 with a resources amount of 108.14 MMBO. For resevoar B, the most potentially zone is the zone of Lead-1 with a resources amount of 662.13 MMBO, Lead-2 Zone with a total resources of 368.46 MMBO, and zone of Lead-3 with a total resources of 99.89 MMBO.

PENGARUH SESAR CITANDUY TERHADAP POLA JURUS LAPISAN BATUAN DI DAERAH BANTARUJEG-MAJALENGKA, PROVINSI JAWA BARAT Ismawan, Ismawan; Haryanto, Iyan
Bulletin of Scientific Contribution Vol 14, No 2 (2016): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Fold pattern of the Tertiary sedimentary rock in Majalengka represents east-west orientation as a partof Jawa fault thrust belts. In the Bantarujeg area, the orientation of those folds are slightly different tothe major east-west orientations due to different shear strength that controls this region as a product ofheterogenity block movement in orientation and speed. It was causing rock mass break laterally andproduce tear faults and/or strike-slip faults. Along the faults, strain direction rotated and bend thestratification of sedimentary rocks along the fault. However, pattern of stratification is depend on thetime development of fault system since the stratifications are not influenced by faults.Step of works of this research was starting by interpret structure and lineament from DEM data, thuscombined by field work data that consists of strike and dip of stratification, lithology and stratigraphysuccession.Keywords : rotation, copel, strain system, anjakan fold, strike pattern, stereographic projection Pola struktur lipatan pada batuan sedimen Tersier di daerah Majalengka, merupakan bagian dari polastruktur lipatan anjakan Jawa yang secara regional berarah barat-timur. Di daerah Bantarujeg, sebagiandari pola struktur ini membusur karena adanya pengaruh tegasan kopel. Tegasan kopel terjadi ketikamasa batuan yang bergerak memiliki kecepatan yang berbeda di setiap segmennya. Peristiwa inimenyebabkan masa batuan robek secara lateral yang akhirnya membentuk tear fault atau sesarmendatar lokal. Selama berlangsungnya peristiwa ini, arah tegasan berotasi dan menyebabkan lapisanbatuan melengkung secara lateral di sekitar zona sesarnya. Tidak semua sesar mendatar merubah polajurus lapisan batuan, hal ini tergantung kepada waktu pembentukannya, yaitu apakah lipatan seret initerbentuk bersamaan dengan pembentukan struktur lipatan anjakan ataukah terjadi sesudahnya.Metoda penelitian dilakukan dengan menganalisis kelurusan struktur melalui DEM, dilanjutkan denganmengukur kedudukan strike dan dip lapisan di lapangan. Selanjutnya dengan mengkompilasi aspekmorfologi dan stratigrafinya, akan diketahui sejauh mana kontrol tear fault merubah pola jurus di daerahini. Pengolahan data struktur dilakukan dengan analisis dem, rekontruksi pola jurus dan proyeksistereografi.Kata kunci : rotasi, kopel, sistem tegasan, lipatan anjakan, pola jurus, proyeksi sterografi.

PENELITIAN STRUKTUR GEOLOGI DAN KAITANNYA TERHADAP KEMUNGKINAN ADANYA POTENSI EMAS PRIMER DAERAH GUNUNG ASTANA BOGOR, JAWA BARAT Haryanto, Iyan
Bulletin of Scientific Contribution: GEOLOGY Vol 3, No 2 (2005): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/bsc geology.v3i2.7454

The study area that is mainly hilly, contains volcanics matters such as breccias, tufaceous lapili, tufand lava. Several outcrops are followed by mineralization where quartz vein also occurred.Developed structures in the study area are quite complex, where NE – SW faults pairing with NW –SE faults. Mineralization zones and quartz vein are found on faults segments, these evidence shows thatthere are primary Au prospect at the subsurface in the study area.

Mapping Channel Distribution Based on Seismic and Well Data in West Natuna Ikramina, Alma; Haryanto, Iyan; Abdurrokhim, .
Bulletin of Scientific Contribution Vol 19, No 2 (2021): Bulletins of Scientific Contribution : Geology
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/bsc.v19i2.34719

Natuna is one of the regions in Indonesia that has potential in hydrocarbon with a siliciclastic reservoir which is generally characterized by a fluvial and deltaic environment. For this reason, it is important to identify the distribution channel to find out the distribution of the reservoir. This study using the well-logging and 3D seismic data interpretation methods. With the correlation between the horizon slicing method on seimsic data, lithology identification in well data, and also using seismic attributes, we can determine the distribution of reservoirs. In reseach area, reservoir distribution analysis in Arang and Muda Formation. Where Arang Formation identified 4 reservoirs, which 3 of them have oil content, with effective porosity value of 10-30%. Meanwhile, in Muda Formation, there are 3 reservoirs with effective porosity of Muda Formation is 20-27%

PENGARUH SESAR CIMANDIRI TERHADAP MORFOLOGI DAERAH PADALARANG Haryanto, Iyan; Sunardi, Edy
Bulletin of Scientific Contribution Vol 12, No 2 (2014): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/bsc.v12i2.8367

Cimandiri Fault is a regional fault that stretching from Pelabuhanratu (Sukabumi) to end up in the complex area of Mt. Tangkubanprahu – Mt. Burangrang (Subang - Northward of Bandung). Regional fault has been widely studied, but there are differences of opinion, especially regarding the type of shift.This study aimed to examine all aspects relating to Cimandiri Fault, especially along the segment Tagokapu-Cibogo (Padalarang-Citatah), so that can be known about the type of the fault. Steps and methods of research, among others, to analyze the landscape through satelite image, make observations, descriptions and measurement of geological structure elements, data processing by program using "dip" and "Paleostress" softwares. Cimandiri fault lines along the segment Tagokapu-Cibogo, can be recognized from various aspects, among others, from the aspect of geomorphology characterized by differences in the shape and elevation of the hills; from stratigraphical aspects there are contact between rock formations of different ages; from fold structure aspects there are found standing upright rock layers; and from the aspect of fault outcrop, there were indications that the fault is generally associated with horizontal fault. From the results of the analysis showed that the lineament of Cimandiri Fault along Tagokapu-Cibogo segment, controlled by a reverse fault and normal faults that formed in different tectonic period.

Co-Authors Abdul Bari Abdurrokhim ⠀ Abdurrokhim, . Adhiperdana, Billy G. Adhiperdhana, Billy Gumelar Adi Hardiyono, Adi Adjat Sudrajat Agus Didit Haryanto -, Agus Didit Haryanto Ahmad Helman Hamdani, Ahmad Helman Ali Djamhuri Andi Agus Nur, Andi Agus Andi Kurniawan Andriana, Yoga Arifin, Alvin Adam Ayu, Shinta B.Sendjadja, Yoga Barkah, Mohamad Nursiyam David Victor Mamengko Djadjang Jedi Setiadi Dudi Nasrudin Usman Edi Tri Haryanto, Edi Tri Edy Sunardi Eko Budi Lelono, Eko Budi Emi Sukiyah Faisal Helmi Fatimah Rosana, Mega Fauziely, Lili Febri Hirnawan Fenry Simorangkir, Fenry Hadi, Mochamad Nur Hafiz, Surya Darma Hendarmawan, . Hermes Panggabean Ikramina, Alma Irdanto Saputra, Irdanto Ismawan Ismawan, Ismawan Johanes Hutabarat Kurnia Arfiansyah, Kurnia Lamba, Lisa Mawardi, Sonny Mega Fatimah Rosana Muhammad Kurniawan Alfadli Mustofa, Santia Ardi Musu, Juwita Trivianty Nana Sulaksana Nanda Natasia Nisa Nurul Ilmi Nurahmah, Siti Chusnul Chatimah Nurdradjat -, Nurdradjat Nurdrajat Nurdrajat Panuju Panuju Pradnya Paramarta Raditya Rendra Raden Irvan Sophian, Raden Irvan Ramadhan, Galih Hadisurya Saputro, Anisa Ayu Saragih, Rahmat Yantono Sulastri, Murni Syaiful Alam Syalsabilla, Lola Lintang Wicaksono, Danny Widyariestha, Mira Wiguna, Purwa Yarra Sutadiwiria Yeftamikha, . Yeftamikha, Yeftamikha Yoga Andriana Sendjaja, Yoga Andriana Yusi Firmansyah, Yusi Yuyun Yuniardi Zufialdi Zakaria, Zufialdi

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