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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 413 Documents
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DISTRIBUSI VERTIKAL OSTRACODA DAN HUBUNGANNYA DENGAN PERUBAHAN LINGKUNGAN DI PERAIRAN TELUK JAKARTA -, Lili Fauzielly
Bulletin of Scientific Contribution Vol 11, No 2 (2013): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1044.085 KB) | DOI: 10.24198/bsc.v11i2.8292

Abstract

A vertical distributions from quantitative analysis of ostracods and Total Organic carbon (TOC) was recorded from short sediment core from inner part of Jakarta Bay. A total of 56 ostracod species were obtained from 9 core samples. The dominant species were Keijella carriei and Loxoconcha wrighti, which are common in areas with high TOC and TN contents. According to analysis of ostracod assemblages and CNS analysis, the site began to be influenced by organic contamination from around 1950. Although the population of Jakarta City has increased rapidly since then, TOC and TN contents which were low, have gradually increased (0.58%–0.9%). The increased sedimentation rate after 1950 resulted in an increasing TOC ratio. 
VULKANISME DAN KARBONAT UMUR MIOSEN DI DAERAH BANJAR-PANGANDARAN, JAWA BARAT Haryanto, Iyan; Ilmi, Nisa Nurul; Adhiperdana, Billy G.; Fauziely, Lili; Sunardi, Edy
Bulletin of Scientific Contribution 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 (2494.618 KB) | DOI: 10.24198/bsc.v16i2.17293

Abstract

Daerah Banjar-Pangandaran merupakan bagian dari Zona Pegunungan Selatan yang sebagian besar disusun batuan volkaniklastik Formasi Jampang. Batuannya didominasi oleh breksi, tuf dan batupasir kasar. Seluruhnya membentuk morfologi perbukitan sedang hingga terjal, dengan punggungan berarah barat-timur. Di bagian tepi dari lereng perbukitannya, tersingkap batugamping yang berumur lebih muda, yaitu Formasi Klapangunggal dan Formasi Pamutuan. Di lapangan tidak ditemukan kontak litologi, namun berdasarkan pada umur batuan yang menerus, serta kedudukannya di lapangan diduga keduanya memiliki hubungan stratigrafi yang selaras. Penelitian ini masih dalam tahap awal yang dilakukan hanya berdasarkan pada data singkapan. Analisis dilakukan dengan melakukan rekontruksi pola struktur (pola jurus), serta dipandu dengan interpretasi geologi melalui DEM.Hasil sementara menunjukan bahwa pertumbuhan carbonate mulai berlangsung ketika aktivitas volkanisma pawa waktu Miosen Bawah Berakhir. Pada saat itu di antara tinggian volkanik, memiliki lingkungan marin yang tenang dan dangkal, sehingga memungkinkan terbentuknya pertumbuhan carbonate. Di lihat dari peyebarannya, carbonate disimpulkan sebagai barrier kecil dan lainnya sebagai pitch reef.
PENGELOLAAN DAERAH RAWAN BENCANA ALAM LETUSAN GUNUNG GEDE DI KAWASAN PUNCAK KABUPATEN CIANJUR -, Bombom Rachmat Suganda
Bulletin of Scientific Contribution 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 (287.089 KB) | DOI: 10.24198/bsc.v9i1.8260

Abstract

The northern part Cianjur based on the Regional Hazard Map of Mount Gede in West Java (kaswanda, 1994) is an explosion hazard areas. The rapid economic development, especially in the tourism sector resulting in increased occupancy, hotel or villa. As a result of the growth area of the building, and the increase of population, and transfer of land use, has resulted in the handling of the impact so that the necessary pre-disaster management in which one of them is a disaster mitigation. Determination of the level of risk is one basis for determining mitigation measures related to spatial planning. The main risk factors of natural disasters include volcanic eruption hazard factors, vulnerability and resilience. Factors will affect the hazard mitigation measures that will be done in the danger area. The primary hazard mitigation in the area would have been different in the secondary area. Thus the delineation is an important step that must be done before determining the level of risk. Determination of the spatial areas prone to natural disasters Volcanic eruptions, can be done with the mitigation measures related to spatial planning based on risk level.
POTENSI AKUIFER KAMPUS ARJASARI BERDASARKAN PENGAMATAN NILAI TAHAN JENIS BATUAN Mohamad, Febriwan; Mardiana, Undang; Yuniardi, Yuyun; Nur, Andi Agus; Alfadli, Muhammad Kurniawan
Bulletin of Scientific Contribution 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 (643.285 KB) | DOI: 10.24198/bsc.v15i2.13383

Abstract

ABSTRACTGeoelectric measurement was done in order to obtain the presence, depth, thickness, quantity and distribution of aquifers in the study area. Geoelectric was done by applying 1-D Schlumberger configuration (DC sounding). Rock layer with a resistivity value ranges <20 μm indicates rocks with low resistance values, dominates the surface until 50 meters depth with varying thickness. This layer lithology thought to be composed of weathered soil, fine tuff and lapilli tuff. This layer is assumed to act as aquiclude, porous media that can store water but acts as barrier to the flow of groundwater. This lithology group can be filled by water during the rainy season, but in dry season contain very small amount of water. Rock layer with resistivity value ranges between 20 μm - 60 μm interpreted as coarse tuff intercalating with fine tuff, founded at 75 meters depths below the surface. Rock layers with high resistance values (> 60 μm), founded more than 75 meters in the north area, assumed to be volcanic breccia with tuff as matrix, and have small potential to act as aquifer. Keyword: Geoelectric, Schlumberger, Aquifer, Resistivity ABSTRAKPengukuran geolistrik yang dilakukan dalam upaya untuk mendapatkan kehadiran, kedalaman, ketebalan, jumlah dan penyebaran akuifer. Hasil  pengukuran geolistrik (Sounding) dengan konfigurasi Schlumberger Kelompok batuan dengan nilai tahanan jenis berkisar antara  <20 Wm yang mengindikasikan batuan dengan nilai tahanan jenis rendah mendominasi permukaan hingga kedalaman 50 meter dengan ketebalan bervariasi. Lapisan ini diduga memiliki litologi penyusun terdiri atas tanah lapukan, tuf halus dan tuf lapili. Lapisan ini diduga berperan sebagai akiklud, yaitu media berpori yang dapat menyimpan air tetapi tidak dapat mengalirkan airtanah yang dapat terisi oleh air pada musim hujan, namun pada musim kering tidak mengandung air. Lapisan batuan dengan nilai tahanan jenis antara 20 Wm - 60 Wm  diinterpretasi litologi tuf kasar berselingan dengan tuf halus, berada pada kedalaman mulai 75 meter di bawah permukaan. Lapisan batuan dengan nilai tahanan jenis tinggi (>60 Wm), mulai di kedalaman lebih dari 75 meter di bagian utara diperkirakan breksi vulkanik dengan matriks berupa tuf, dan memiliki potensi kecil sebagai akuifer. Kata Kunci: Geolistrik, Schlumberger, Akifer, Resistivitas
POTENSI GEOWISATA KAWASAN GUNUNG BADAK, TELUK CILETUH-SUKABUMI -, Mega F. Rosana
Bulletin of Scientific Contribution Vol 6, No 2 (2008): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (985.16 KB) | DOI: 10.24198/bsc.v6i2.8166

Abstract

Gunung Badak area, Ciletuh Bay, Sukabumi is area that has a rare diversity of rock at West Java region. Morphology of this area is interesting enough for one of the aspects of tourism, especially geological asptect (geotourism).This reveals the general geotourism potential in the Ciletuh Bay area. Method used in this study is a survey directly in the field and a review of some aspects of the geological literature Ciletuh. There are three groups of objects geotourism that can be developed in this area, namely: Amphiteater Morphology of Ciletuh Bay; Mandra Island; Manuk Island; Kunti Island and Lava pillows; G. Badak and G. Aseupan.Management and effective supervision are required to develop this potential to be geotourism, considering this area is part of Nature Reserve Cibanteng. Development potential to the south towards Ujung Genteng geotourism quite well developed for tourism towards the coast, and the green turtle protection.
Studi Awal Potensi Bahan Galian Pada Daerah Kabupaten Belitung Timur, Indonesia Natasia, Nanda; Barkah, Muhammad Nursiyam; Saputra, Dian Hari; Alfadli, Muhammad Kurniawan
Bulletin of Scientific Contribution Vol 14, No 2 (2016): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1736.891 KB) | DOI: 10.24198/bsc.v14i2.9801

Abstract

The mining development is influences the economy growth and support to increases the society prosperity. East Belitung be able to execute the mining development which have some potential mining resources such tin, galena, iron ore, bauxite, granite, quartz sand, and kaolin. The research method is field observation to find out the geological condition and the mining material resources along with GIS analysis for representation the geomorphology and geology in East Belitung. East Belitung geomorphology consist of plains and hills with elevation more than 600 msl. The plain area is used for tin exploration and oil palm plantation, while the hill area for protected forest. East Belitung geology consist of alluvium, carbon sand, Tajam Formation, Kelapakampit Formation, Siantu Formation, Tanjungpandan Granite, Baginda Adalemite, Burungmandi Granodiorite, Batubesi Quartz Diorite. The geology structure in East Belitung are fold, fault and crack. Generally, the fold direction is NW-SE, the fault direction is NE-SE. Based on geochemical analysis and the distribution of mining material resources can be concluded that East Belitung area have large potential of mining material resources, it seen from galena, iron ore and bauxite materials that have intermediate until good quality. Besides that, from the delineation of potential distribution map shown the mining material have extensive distributions and can be optimization for regional development and society prosperity. Keywords : Mining Material, East Belitung, Delineation of Potential Distribution, Mining ABSTRAKPerkembangan area pertambangan sangat berpengaruh kepada pertumbuhan ekonomi suatu daerah dan membantu dalam peningkatkan kesejahteraan masyarakat. Salah satu daerah yang dapat melakukan pengembangan area pertambangan adalah Belitung Timur yang memiliki beberapa potensi bahan galian antara lain timah, galena, biji besi, bauksit, granit, pasir kuarsa, dan kaolin. Metode penelitian berupa pengamatan lapangan untuk mengetahui kondisi geologi dan sumberdaya bahan galian serta analisis GIS untuk mendapatkan gambaran geomorfologi dan geologi Kepulauan Belitung. Geomorfologi pada daerah Belitung Timur berupa pedataran dan perbukitan yang ketinggiannya berada diatas 600 mdpl. Pedataran lebih banyak dipergunakan untuk penambangan timah dan perkebunan sawit, sedangkan perbukitan dimanfaatkan untuk hutan lindung. Geologi pada daerah Belitung Timur terdiri dari Aluvium, Pasir berkarbon, Formasi Tajam, Formasi Kelapakampit, Formasi Siantu, Granit Tanjungpandan, Adalemit Baginda, Granodiorit Burungmandi, Diorit Kuarsa Batubesi. Struktur geologi yang berkembang pada kawasan ini adalah lipatan, sesar dan kekar .Arah sumbu lipatan umumnya Baratlaut-Tenggara, sedangkan sesar berarah Timurlaut-Baratdaya. Berdasarkan analisis geokimia dari sampel lapangan dan sebaran dari bahan galian yang ada dapat disimpulkan bahwa daerah kawasan Belitung Timur memiliki potensi bahan galian yang besar, terlihat dari kandungan bahan galian galena, biji besi, dan bauksit yang memiliki kadar menengah hingga tinggi. Selain itu, dari hasil deliniasi sebaran potensi memperlihatkan sebaran bahan galian berpotensi yang berada pada kawasan Belitung Timur sangat besar dan dapat dioptimalisasi agar berguna untuk pembangunan dan peningkatan kesejahteraan masyarakat. Kata kunci : Bahan Galian, Belitung Timur, Deliniasi Sebaran Potensi, Pertambangan.
STUDI PROVENANCE BATUPASIR FORMASI - FORMASI DI CEKUNGAN OMBILIN, SUMATRA BARAT -, Euis Tintin Yuningsih
Bulletin of Scientific Contribution Vol 5, No 1 (2007): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/bsc.v5i1.8132

Abstract

Based on rock composition percentage of feldspar, quartz and rock fragment on Q-F-L triangle diagram, the sandstone provenance of Brani Formation is continental block, otherwise Sawahlunto and Sawahtambang Formations is recycled orogen. Qm-F-L triangle diagram shows the provenance of Brani, Sawahlunto and Sawahtambang Formations is continental block, Sangkarewang and Ombilin Formations is transitional magmatic arc placed in the Cretaceous orogen belt as a result of convergency of Mergui-Woyla microplates. Based on rock composition percentage on the Qp-Lv-Ls triangle diagram, the source for Brani and Sawahtambang Formations is mixed orogenic sand, Sawahlunto Formation is collision orogen and mixed orogenic sand, otherwise the source for Sangkarewang and Ombilin Formations is arc orogen where the zone of collision is the suturing of Mergui-Woyla microplates, Qm-P-K triangle diagram shows that Brani, Sawahlunto and Sawahtambang Formations have high maturity or stability from continental block indicated the source of stable micro continen (continental block provenances) as a part of Mergui-Woyla terrane, Sangkarewang Formation has low maturity or stability
STRUKTUR SESAR DI PULAU JAWA BAGIAN BARAT BERDASARKAN HASIL INTERPRETASI GEOLOGI -, Iyan Haryanto
Bulletin of Scientific Contribution 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 (1473.053 KB) | DOI: 10.24198/bsc.v11i1.8283

Abstract

There are four major fault lines pattern that developed in Tertiary sedimentary rocks in the Western Part of Java Island, that are the east-west, north-south, northwest-southeast and northeast-southwest. Fault structures with the east-west direction generally existed as a reverse fault and as the main fault patterns that control the distribution of rocks on the surface. Regionally, together with structural folds, these fault structures has formed the thrust fold belt structure. The other faults direction, generally known as the secondary faults that formed simultaneously with the thrust fold belt structure. These faulst are generally as strike slip fault or oblique faults that are transtensional or transpressional. This fault pattern is formed when a horizontal force strength differences in each segment. From the Compilation of the fold structures data, faults and the stratigraphy, it can be concluded that the geological structure developed in Tertiary sedimentary rocks in the western part of Java Island, began formed at late Tertiary, under the main compressional system, which is north-south trending. 
FASIES DAN LINGKUNGAN PENGENDAPAN BATUGAMPING FORMASI KALIPUCANG DAERAH KARANGNUNGGAL, TASIKMALAYA JAWA BARAT Kotarumalos, Sitti Hafsa; Abdurrokhim, .; Sendjaja, Yoga A.
Bulletin of Scientific Contribution Vol 16, No 1 (2018): Bulletin of Scientific Contribution GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1383.707 KB)

Abstract

Penelitian ini membahas fasies batugamping dan lingkungan pengendapan Formasi Kalipucang berumur Miosen Tengah, dan tersingkap di Karangnunggal, Tasikmalaya, Jawa Barat. Pengelompokkan fasies batugamping ini berdasarkan pada tekstur batuan dan komposisi skeletal (bioclast). Fasies batugamping Formasi Kalipucang dapat dikelompokkan menjadi 7 fasies, yaitu: (1) batugamping packstone berkomposisi dominan alga, (2) batugamping rudstone, (3) batugamping packstone berkomposisi dominan foraminifera, (4) batugamping wackestone – packstone berkomposisi foraminifera, (5) batugamping grainstone berkomposisi alga, (6) batugamping grainstone berkomposisi foramifera, dan (7) batugamping packstone berkomposisi coral. Batugamping Formasi Kalipucang ini diinterpretasikan diendapkan dalam lingkungan foreslope–deep shelf margin and barrier– shelf lagoon pada sebuah paparan yang terisolasi dari endapan volkanik.Kata kunci: batugamping, fasies, lingkungan pengendapan, Formasi Kalipucang, Tasikmalaya, Jawa Barat
ZONASI PALEONTOLOGI CEKUNGAN KUTAI BAGIAN BAWAH, DAERAH BALIKPAPAN DAN SEKITARNYA, PROVINSI KALIMANTAN TIMUR -, Yuyun Yuniardi; -, Rahmat Fakhrudin; -, Lia Jurnaliah
Bulletin of Scientific Contribution Vol 8, No 2 (2010): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (966.657 KB) | DOI: 10.24198/bsc.v8i2.8250

Abstract

Fossil of Foraminifera, Nannoplankton, and Pollen were got into rock sample in lower Kutai Basyn and very interesting to do research. Paleontology zone were made for deliniation of rocks formation in lower Kutai Basyn. Paleontology zone divided into three part : Foraminifera zone, Pollen zone, and Nannoplankton zone.

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