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Bulletin of Scientific Contribution : Geology
Published by Universitas Padjadjaran
ISSN : 16934873     EISSN : 2541514X     DOI : doi.org/10.24198/bsc%20geology.v18i1
Core Subject : Science, Social, Engineering,
Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Energy Environmental Science
BSC Geology adalah jurnal yang dikelola oleh Fakultas Teknik Geologi Universitas Padjadjaran,terbit 3 kali dalam setahun (April, Agustus, dan Desember), yang menerbitkan karya tulis ilmiah dalam bidang kebumian terutama yang berkaitan dengan geologi seperti : Petrologi Paleontologi Geomorfologi Stratigrafi Geologi Dinamik Geologi Lingkungan dan Hidrogeologi Geologi Teknik Geokimia Geofisika Sedimentologi. Setiap artikel yang akan diterbitkan adalah bersifat tanpa biaya (no processing charges dan no submission charges). Dewan redaksi dan penerbit tidak pernah meminta bayaran untuk penerbitan pada jurnal ini. Tujuan dari jurnal ini adalah untuk memperkaya pengetahuan dan informasi tentang ilmu kebumian dan dapat dimanfaatkan untuk kemaslahatan bersama.
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Geologi
Articles 364 Documents
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IMPLEMENTASI RTRW KOTA TANGERANG SELATAN DAN TANTANGAN MASA DEPAN Achmad Sjafrudin -
Bulletin of Scientific Contribution: GEOLOGY Vol 11, No 3 (2013): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (553.262 KB) | DOI: 10.24198/bsc geology.v11i3.8295

Abstract

To depelop region could be give positif and negatif impact to the environment.Case studies give example could be impact to the soil, land and space in this area. In the implementation regulation of the Perda No. 15 , Year 2011-2031 should be followed by all stakeholder on the development planing in those area. The regulation guide the fuction in the pasal 2, as operational tool development in South Tangerang. The other words we call instrument guide sustainable development.
Basin Classification Based on Quantitative Geological Risk Factors Syamsul Irham; Nana Sulaksana; Adjat Sudrajat; Muhammad Burhanidunnur
Bulletin of Scientific Contribution: GEOLOGY Vol 16, No 2 (2018): Bulletin of Scientific Contribution GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (374.714 KB) | DOI: 10.24198/bsc geology.v16i2.18569

Abstract

Abstract. Indonesia's oil and gas reserves are small and certainly will run out quickly if production is not followed by additional efforts. Exploration activities are not only one effort but also the first step of all efforts to increase reserves through the discovery of oil and gas resources. Efforts are needed to attract exploration investment interests, including access into available data, presentation of results from exploration activities and geological risk. The present research aims to study the characteristics of the geological risk in several basins based on the quantitative geological factors. In conducting the quantitative analysis, there are some factors of petroleum system that have to be recognized inter alia, source rock, reservoir, seal, trap, migration, fault and fold. For this purpose, six basins were selected representing frontier, semi mature and mature basins. Three basins were taken from the western part of Indonesia, and three others from the eastern part.
SIGAP GERAKAN TANAH, SISTEM INFORMASI GEOGRAFIS APLIKASI PENANGANAN GERAKAN TANAH Zufialdi Zakaria -
Bulletin of Scientific Contribution: GEOLOGY Vol 9, No 1 (2011): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (676.358 KB) | DOI: 10.24198/bsc geology.v9i1.8263

Abstract

Sistem Informasi Geografis (SIG) merupakan perangkat informatif yang cepat dan mudah diakses setelah semua data informasi digabungkan ke dalam suatu perangkat lunak (soft-ware) komputer.Banyak manfaat yang didapat dari SIG ini. Aplikasinya dapat digunakan untuk bidang sosial, ekonomi, politik, budaya, maupun pertahanan dan keamanan. Selain itu, SIG tersebut juga bermanfaat bagi aplikasi penanganan bencana-bencana alam seperti bencana longsor (gerakan tanah), tsunami, gempa dan lain-lain, juga dalam penetapan kawasan rawan banjir (Sukiyah, et al., 2004).
THE VOLCANIC DEPOSIT WEATHERED PRODUCT IN JATINANGOR AREA, WEST JAVA Raden Irvan Sophian; . Abdurrokhim; Iyan Haryanto; . Hendarmawan
Bulletin of Scientific Contribution: GEOLOGY Vol 15, No 2 (2017): Bulletin of Scientific Contribution GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1242.17 KB) | DOI: 10.24198/bsc geology.v15i2.13396

Abstract

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
DAMPAK LINGKUNGAN EKSPLOITASI AIR TANAH DAN PEMBANGUNAN PABRIK AMDK PT. TIRTA INVESTAMA DI KAMPUNG SALAM, DESA DARMAGA DAN PASANGGRAHAN, KECAMATAN CISALAK, KABUPATEN SUBANG, JAWA BARAT Achmad Sjafrudin -
Bulletin of Scientific Contribution: GEOLOGY Vol 7, No 1 (2009): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (536.767 KB) | DOI: 10.24198/bsc geology.v7i1.8230

Abstract

The ground water exploitation and the AMDK factory construction of PT. Investama at Darmaga and Pasawahan Village, Sub-District of Cisalak will raise effects towards the environment. Hence the needs of EIA study is very crucial to minimize all the effects that will appear in the future to support sustainable development.
LOW RESISTIVITY ZONE PADA RESERVOIR BATUPASIR FORMASI CIBULAKAN ATAS, CEKUNGAN JAWA BARAT UTARA Firman Herdiansyah; Abdurrokhim Abdurrokhim; Ildrem Syafri
Bulletin of Scientific Contribution: GEOLOGY Vol 14, No 1 (2016): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1847.726 KB) | DOI: 10.24198/bsc geology.v14i1.9804

Abstract

Wireline geophysical well log (well log) is very important data to interpret formation and formation charecteristics identification in the subsurface. Data well log aims identify reservoir zone, fluid type in the subsurface and to determine of parameters such as clay volume (Vcl), formation porosity, and water saturation (Sw).  This research intend to discuss the formation evaluation and hydrocarbon bearing formation. The characteristics and controlling factor of low resistivity zone of sandstone reservoir in this study case become very crucial to be understood.  The composition, thickness, and  depositional of those sandstone reservoir are interpreted as the major controlling factor for being low resistivity (0.5–5 Ohm) of productive reservoir with total oil production 585.57 stb/m and total gas production  4.78 Mscf/m. Keywords: Low resistivity, formation evaluation, characteristics and controllers of low resistivity sandstone. Well log (wireline geophysical well log) merupakan data yang digunakan untuk mengevaluasi formasi dan mengetahui karaketristik batuan di bawah permukaan (subsurface). Data well log dapat menentukan zona reservoir, tipe fluida yang ada di bawah permukaan, dan determinasi nilai kehadiran lempung (Vcl), porositas formasi, dan saturasi air (Sw). Penelitian ini fokus pada evaluasi formasi baik kualitatif maupun kuantitatif pada zona hidrokarbon dengan harga resistivitas rendah berdasarkan hasil pengukuran deep resistivity log. Karakter dan faktor pengontrol pada zona batupasir yang memiliki fenomena harga resistivitas yang rendah menjadi suatu anomali ketika zona tersebut merupakan zona yang produktif. Komposisi batupasir, ketebalan batupasir, dan lingkungan pengendapan batupasir dengan resistivitas yang rendah (0.5–5 Ohm) memiliki perbedaan karakteristik dengan batupasir yang memiliki harga resistivitas yang normal (> 5 Ohm). Harga estimasi saturasi air yang tinggi (75%–80%) dan harga deep resistivity yang rendah (0.5–5 Ohm) pada zona produktif dengan total produksi minyak 585.57 stb/m dan gas 4.78 Mscf/m.  Kata Kunci : Resistivitas rendah, evaluasi formasi, karakteristik dan pengontrol batupasir resistivitas rendah.
KARAKTERISTIK ENDAPAN VULKANIK SUB DAS CIGOMBONG LERENG TIMUR GUNUNG SALAK DEDEN ZAENUDIN MUTAQIN; Febriwan Mohammad; Undang Mardiana; Yuyun Yuniardi; Muhammad Kurniawan Alfadli
Bulletin of Scientific Contribution: GEOLOGY Vol 17, No 2 (2019): Bulletin of Scientific Contribution : GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2557.95 KB) | DOI: 10.24198/bsc geology.v17i2.22569

Abstract

ABSTRAKMetode stratigrafi yang digunakan pada batuan vulkanik serupa dengan mempelajari stratigrafi pada batuan sedimen, yaitu membuat korelasi, urutan secara vertikal berdasarkan waktu, menentuakan perubahan fasies dan sejenisnya. Penelitian Stratigrafi rinci mengenai daerah vulkanik masih jarang dilakukan. Hal ini biasanya dikarenakan oleh kondisi lapangan yang sulit ditempuh. Penelitian ini berlokasi di Sub DAS Cigombong Lereng Timur Gunung Salak untuk mengetahui perubahan litologi baik secara lateral maupun vertikal. Permasalahan dipecahan dengan Observasi lapangan. Data lapangan berupa lintasan-lintasan stratigrafi berdasarkan daerah cekungan pengaliran. Berdasarkan fasies vulknik dari keseluruhan analisis , terdapat 6 kelompok fasies dari muda ke tua yaitu endpan aliran laharik gunung salak, endapan aliran lava 2 gunung salak, endapan aliran lava 1 gunung salak, endapan aliran piroklastik scoria 3 gunung salak endapan aliran lava 1 gunung salak, endapan aliran piroklastik scoria 2 berasosiasi dengan endapan Seruakan gunung salak, dan endapan aliran lava 1 gunung salak, endapan aliran piroklastik scoria 1 pra gunung salak.Kata kunci: Cigombong, Fasies Gunung Api, Salak, VulkanikABSTRACTStratigraphy in volcanic area have similar treatment with sedimentary rock study process, i.e. make correlations, order vertically based on time, determine changes in facies and the like. Detailed stratigraphic research on volcanic areas is rarely done. This is usually caused by field conditions that are difficult to go through. This research is located in the Cigombong East Slope Sub-watershed of Mount Salak to determine lithological changes both laterally and vertically. The problem is solved by field observations. Field data in the form of stratigraphic trajectories based on drainage basins. Based on the Vulcanic facies of the whole analysis, there are 6 facies groups from young to old, namely Salak mountain flow depletions, Salak flow 2, Salak flow 1, pyroclastic flow, scoria 3 Salak mountain deposition, lava flow 1 Salak mountain, scoria pyroclastic flow sediment 2 associated with Salak mountain excavation, Salak mountain lava flow 1, pyroclastic flow precipitate 1 Salak mountain.Keyword: Cigombong, Volcanic Facies, Mt. Salak, Volcanic.
PERAN SESAR TERHADAP KARAKTER DAN ARAH ALIRAN AIRTANAH PADA ENDAPAN VOLKANIK DI LERENG TENGGARA G. GEDE, KABUPATEN CIANJUR, JAWABARAT Ismawan T. -; Yudi Rahayudin -; Boy Yoseph CSSSA -; Bombom Rahmat Suganda -; Nursiyam Barkah -
Bulletin of Scientific Contribution: GEOLOGY Vol 11, No 1 (2013): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3409.64 KB) | DOI: 10.24198/bsc geology.v11i1.8286

Abstract

Volcano as high morphology feature acts as a good water catchment and recharge area. This area also has a volcanic deposition characteristic that changes within a near range, and usually has complex geological structures that effects the groundwater systems. The aim of this study is to identity the role of faults toward groundwater conditions, determine facies and shallow groundwater flow based on the water table. The study area is in a volcanic deposition aquifer system that is composed of lapilli tuff, volcanic breccias, and sand. The occurance of several springs with groundwater conditions are controlled by faults and fractures. Physical characteristics of the water comprises, EC=104μS/cm -490 μS/cm, TDS = 49 mg/L- 240 mg/L, pH 4,2 – 8,6, Temperature 20,4°C – 26°C, debit 0,05 L/sec up to 100 L/sec. Chemical facies of the water is divided into three types: Ca, HCO3, Ca, Mg HCO3 and Mg, Ca HCO3.The direction of the shallow groundwater flow generally follows the topographics features with a direction northwest-southeast. 
Studi Hidrokimia dan Karakteristik Airtanah di Kecamatan Cibiru dan Cileunyi, Bandung, Jawa Barat, Indonesia Kholqi Dianardi; Sapari Dwi Hadian; Teuku Yan W. M. Iskandarsyah; Faizal Muhamadsjah
Bulletin of Scientific Contribution: GEOLOGY Vol 16, No 2 (2018): Bulletin of Scientific Contribution GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2616.964 KB) | DOI: 10.24198/bsc geology.v16i2.17812

Abstract

Bandung adalah salah satu kota terbesar di Indonesia. Kecamatan Cibiru dan Kecamtan Cileunyi merupakan daerah yang terletak berbatasan antara Kota Bandung dan Kabupaten Bandung. Perkembangan industri maupun berbagai aspek kehidupan dalam hal ini khususnya wilayah Kecamatan Cibiru dan Cileunyi mengalami perkembangan yang cukup pesat. Peningkatan jumlah industri dan ekstraksi airtanah akan selalu diikuti oleh peningkatan limbah. Limbah cenderung mengandung bahan kimia beracun dan berbahaya. Berdasarkan kondisi bentang alam kedua kecamatan tersebut berada pada zona fasies medial dan distal Gunung Manglayang. Penelitian dilakukan berdasarkan data dari singkapan, data sumur gali dan mata air menggunakan metode orientasi lapangan dibantu oleh penggunaan GPS dan alat ukut fisik dan kimia airtanah. Tujuan dari penelitian ini adalah untuk mengetahui karakteristik kimia airtanah di Kecamatan Cibiru dan Kecamatan Cileunyi. Pengambilan sampel airtanah dilakukan pada 12 lokasi. Untuk menentukan karakteristik kimia airtanah, hasil uji analisis laboratorium hidrokimia dianalisis menggunakan metode diagram piper dan diagram durov. Kondisi geologi seperti unit geomorfologi dan tipe litologi berkorelasi dengan lokasi data airtanah. Berdasarkan kondisi hidrogeologi, daerah penelitian termasuk kedalam sistem akuifer deposit vulkanik dan sistem akuifer deposit lakustrin. Hasil analisis kimia dari diagram piper memperlihatkan fasies kimia airtanah yang terdapat pada daerah penelitian adalah Ca:HCO3, Ca.Mg:HCO3, Mg:HCO3 dan Ca:No Dominan, sedangkan hasil analisis kimia dari diagram durov memperlihatkan daerah penelitian didominasi oleh proses pertukaran ion dan pencampuran ion airtanah.
DELINEASI RESERVOIR PANAS BUMI BERDASARKAN LITOLOGI, ALTERASI HIDROTERMAL DAN PROFIL TEMPERATUR Cyrke A.N. Bujung -; Alamta Singarimbun -; Dicky Muslim -; Febri Hirnawan -; Adjat Sudradjat -
Bulletin of Scientific Contribution: GEOLOGY Vol 8, No 3 (2010): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (543.739 KB) | DOI: 10.24198/bsc geology.v8i3.8254

Abstract

This study aims to delineate the breadth and depth of the geothermal reservoir and the resulting temperature. The method used is a compilation of lithology, alteration and the temperature profile that is supported by literature references and well data. Delinasi prospect area and deep reservoir of data viewed by lithology, alteration and the temperature profile. Regional prospects in the region of 2000C or more temperatures are also characterized by the presence of epidote minerals and are on lava and pyroclastic stratigraphy perselingan. The results obtained two different reservoir sites, the first located at depths of 800-1300 m above sea level and an area reached 1.37 x 107 m2., While the second is located at a depth (900 m - bottom) and an area of more than 3, 38 x 106 m2. Based on the temperature profile, the type of prospect geothermal reservoir in this area is the type of dominance of steam. .

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