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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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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.
PERAN GEOLOGI TEKNIK DAN ANALISIS KEWILAYAHAN DALAM GEOLOGI MILITER DI INDONESIA Zakaria, Zufialdi
Bulletin of Scientific Contribution 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 | Full PDF (315.423 KB) | DOI: 10.24198/bsc.v3i2.7456

Abstract

Since ancient Chinesse era to World-War 2, knowledge of geoscience hold important role in themilitary world. Landscape analysis (potency and constraint) for military is needed to evaluate enemymovement and its war equipments, to determining access of location rute, to mapping hydrogeologysurface and underground for structural defence & military personnel and also for attack. Though Spot-5,Ikonos and Quickbird sattelite images’ exist, but map of military geology is necessary to remainingsurface material physical characteristic toward teritorial enemy and also to develop defence citadel.Map and scale of military geology based on engineering geology condition for need of military. Variationscale depend on needed, from big scale (most detailed) to small scale (regional).In Indonesia, Indonesian Association of Geologist (IAG) both Geological Research and DevelopmentCenter (GRDC) not had Unit of Military Geology yet. In America, Unit of Military Geology was formedsince 1942. This unit duty is complie terrain intelligence, how troops can be move in land; finding ofwater, fuel, mineral and construction material, solving construction problem and base landing plane. 
LINGKUNGAN PEMBENTUKAN DAN DIAGENESIS BATUGAMPING DAERAH KEMANG BARU DAN SEKITARNYA, KABUPATEN SIJUNJUNG Patonah, Aton; Isnaniawardhani, Vijaya
Bulletin of Scientific Contribution Vol 12, No 1 (2014): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1302.32 KB) | DOI: 10.24198/bsc.v12i1.8361

Abstract

Carbonate rock is one of reservoir rock types in petroleum. It is interesting to study because its special characteristic, that is, it can change so easily that will affect to quality and quantity of reservoir. This research has been done at Kemang Baru area and around, Sijunjung Distric. Purposes of this research are to know texture and composition characteristic and to know what kind of environment deposition and diagenesis process involved as long as the formation. To get the information about that, petrography and Palinology methods are used. The result of this research shows that only 37 samples of carbonate type from 69 samples which have been analized. These are wackestone and mudstone. They have been formed at low energy environment and in reduction process which is characterized by present of pyrite in the rocks. To support the data, result of Palinology analysis, the rock have contained Dicolpopollis sp., Margocolporites sp., Palmaepollenites sp. and Psilatricolpites sp, berasosiasi dengan Acrostichum sp., Detloidospora sp., Hyphae sp., Inaperturisporites sp., Laevigatosporites sp., Verrucatosporites sp. Based on these, the rocks were formed at deep Lake.
KARAKTERISTIK BATUBARA REGRESI DAN TRANSGRESI FORMASI MUARA ENIM CEKUNGAN SUMATRA SELATAN Nurdrajat, Nurdrajat
Bulletin of Scientific Contribution Vol 16, No 3 (2018): Bulletin of Scientific Contribution GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (895.446 KB) | DOI: 10.24198/bsc.v16i3.18772

Abstract

Formasi Muaraenim merupakan formasi pembawa-batubara yang tersebar meluas di Cekungan Sumatra Selatan. Penyebaran pola batubara pada daerah penelitian belum dapat dijelaskan dari sisi temporal dan spasialnya. Sehingga, status horison korelasi seam batubara masih bersifat parsial. Melalui konsep stratigrafi sikuen dengan metode sumur/log dan rekonstruksi paleogeografi, maka status kehadiran dan kompleksitas batubara pada daerah penelitian dapat dijelaskan secara komprehensif. Tujuh belas unit sikuen terbentuk dengan karakter tiap unit sikuen yang beragam. Unit sikuen tersebut terbagi kedalam sikuen regresi dan transgresi. Karakter batubara pada sikuen transgresi berbeda pada saat sikuen regresi. Karakter batubara dalam sikuen regresi memiliki pola ketebalan yang semakin menebal ke arah lapisan yang lebih muda (thickenning upward) dan sebaliknya, batubara dalam pola penipisan ketebalan (thinning upward) berada dalam unit sikuen transgresi. Konsep dan metode yang diterapkan ini mampu menjelaskan karakter fisik (spasial) serta waktu (temporal) dalam kerangka transgresi/regresi yang berkorespondensi terhadap fase genetik pembentukan batubara dalam tiap siklus pengendapan. Kata kunci: Seam Batubara, Formasi Muaraenim, stratigrafi sikuen, Temporal-Spasial.
KUALITAS BATUAN BEKU ANDESITIS BERDASARKAN PENDEKATAN KUAT TEKAN DAN PETROLOGI -, Irvan Sophian; -, Aton Patonah; -, Febriwan Mohamad
Bulletin of Scientific Contribution Vol 9, No 3 (2011): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (686.214 KB) | DOI: 10.24198/bsc.v9i3.8271

Abstract

The quality of infrastructure is related to the materials to be used, especially rock strength. Infrastructure usually uses the rock material as foundation, road materials, etc. Rock samples were taken from Lagadar-Cimahi and Licin-Cimalaka. Petrographic analyses and point load tests were carried out to determine physical and mechanical characteristics. Rock types of Lagadar are andesite and basaltic and Cimalaka are andesite, basalt, and diorite. Rocks of Lagadar are stronger than Licin based on point load test. Point load test of Lagadar rock samples for andesite ranges from 8.17 - 30.57 kg/cm2, basalt ranges from 47.68 -144.03 kg/cm2, and point load test of andesite, basalt, and diorite from Cimalaka ranges between 4.08 - 10.34 kg/cm2, 4.09 -13.83 kg/cm2, and 6.12 kg/cm2 respectively. Rock strength is influenced by mafic mineral content, void ratio, porosity, texture, rock structures, and the degree of weathering.
KARAKTERISTIK SISTEM HIDROGEOLOGI KARST BERDASARKAN ANALISIS HIDROKIMIA DI TELUK MAYALIBIT, RAJA AMPAT Endah, Raras; Yoseph, Boy; Sukiyah, Emi; Setiawan, Taat
Bulletin of Scientific Contribution Vol 15, No 3 (2017): 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.v15i3.15100

Abstract

ABSTRAKKarst Teluk Mayalibit memiliki sistem hidrogeologi yang unik karena sebagian pola aliran bukan berasal dari kawasan karst itu sendiri. Penelitian sistem hidrogeologi karst ini dilakukan dengan menggunakan analisis hidrokimia yang dikompilasi dengan observasi hidrogeologi di lapangan. Berdasarkan analisis data hidrokimia seperti temperatur, derajat keasaman (pH), tekanan parsial terhadap CO2 (PCO2),  dan indeks kejenuhan terhadap kalsit (SIkalsit) menunjukan bahwa pada elevasi 40-80 mdpl termasuk dalam zona transisi dengan sifat sistem aliran terbuka atau rongga,  sedangkan pada elevasi 20-40 mdpl analisis hidrokimia menunjukan bahwa elevasi ini termasuk zona aliran menerus dengan sifat sistem aliran tertutup atau difusi. Kata Kunci : Karst, Sistem Hidrogeologi, Hidrokimia, Sistem Aliran, Teluk Mayalibit.ABSTRACT Karst of Mayalibit Bay has a unique hydrogeological system because some flow patterns are not from karst area itself. Karst of hydrogeological system research is done by using hydro chemical analysis which is compiled by hydrogeological observation in the field. Based on analysis of hydro chemical data such as temperature, degree of acidity (pH), partial pressure on CO2 (PCO2), and saturation index of calcite (SIcalcite) showed that at elevation 40-80 mdpl included in transition zone with open flow system or cavity, 20-40 mdpl hydro chemical analysis indicates that this elevation includes a continuous flow zone with the nature of the closed flow system or diffusion. Keywords: Karst, Hydrogeology System, Hydro chemical, Flow System, Mayalibit Bay.
SUMBERDAYA BATUBARA KAWASAN BLOK PT. TEUNOM RESOURCES, KAB. ACEH BARAT, PROPINSI NANGGROE ACEH DARUSSALAM -, Geni Dipatunggoro
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 | Full PDF (1099.341 KB) | DOI: 10.24198/bsc.v5i1.8134

Abstract

Recognissances was carried out in blocks of coal PT. Teunom Resources, which all belong to Meulaboh area, West Aceh Regency, the Province of Nangrroe Aceh Darussalam.The area of Meulaboh geologically belong to Plio-Pliestocene age Tutut Formation in land and maish environment deposition. The litology consist of conglomerate, sandstone, claystone and lignite. The basin of this Formation deposition is well known as “ Meulaboh Embayment “.The compiled reference some previous exploration result on the thickness of coal seams in Meulaboh ranging some centimeters to 8 (eight) meters and morever the calorivic value ranging 3900 – 5100 cal/gr. The result of recognissance in the surveyed area appears that the observed coal seams occurs as intercalation and lenses of some centimeter to 80 centimeters of thickness where the strike of layer trending northwest – southeast and dipping ranging 4º - 5º. Among the above mentioned block, the number of seam outcrops occur much more in block PT. Teunom Resources. The reserve restricted to the 3 layers of 80 centimeters dippingt less 5º is roughly estimated 2.633.133 tons.The quality of coal as analyzed by the Directorate of Minerals Resources in Bandung appears as follow: Total Sulphur 0.19% - 0.35% adb; Ash 4.33% - 7.39% adb; Fix Carbon 33.00% - 39.27% adb; Volatile Matter 47.01% - 54.17% adb; Moisture 8.19% - 8.97% adb; Total Moisture 43.22% - 47.23% ar; and Free Moisture 38.15% - 42.03% ar.
LITOSTRATIGRAFI CEKUNGAN OMBILIN DALAM KERANGKA TECTONO-SEDIMENTATION RIFT BASIN Mulyana, Budi; Gani, Reza Mochamad Ganjar
Bulletin of Scientific Contribution Vol 13, No 2 (2015): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (678.714 KB) | DOI: 10.24198/bsc.v13i2.8393

Abstract

During Tertiary, the sedimentation model in Ombilin Basin, West Sumatra, was strongly influenced by tectonisme. It is indicated by characteristic and composition of the rock, and distribution pattern for each formation. In general, it can be decided into two main groups according to the age of rocks, which associated with the tectono-sedimentation rift basin. Brani, Sangkarewang, Sawahlunto and Sawahtambang Formations were deposited in terrestrial to transition zone during syn-rift phase. Meanwhile, Ombilin and Ranau Formations, which is dominated by volcanic deposits, were formed for the period of post-rift phase indicated by marine influence has existed.
Deteksi Sebaran Debu Vulkanik Menggunakan Citra Satelit Himawari-8 (Studi Kasus Gunung Sinabung 9 Juni 2019) Pratama, Deka Agung; Masruri, M. Fakhrul Islam; Saputro, Mahmudi Bagus; Siwi, Nanda Dewi Pamungkas; Fajarianti, Rahpeni; Margiono, Relly
Bulletin of Scientific Contribution Vol 17, No 3 (2019): Bulletin of Scientific Contribution : GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (761.507 KB) | DOI: 10.24198/bsc.v17i3.25582

Abstract

Letusan Gunung Sinabung yang terletak di Dataran Tinggi Karo, Sumatra Utara pada tanggal 9 Juni 2019 menyebabkan adanya kolom abu vulkanik berwarna hitam pekat dengan ketinggian mencapai ±7.000 m di atas puncak gunung. Kolom abu vulkanik itu tersebar hingga menyelimuti sekitar lima kabupaten di sekitar lokasi gunung api tersebut. Proses evakuasi perlu dilakukan untuk meminimalisir jumlah korban akibat peristiwa letusan ini. Proses evakuasi dapat dilakukan dengan mengetahui jejak persebaran dari kolom abu vulkanik. Ada beberapa cara untuk mengetahuinya, salah satu diantaranya adalah dengan menggunakan data dari citra satelit Himawari-8 yang diolah dengan memanfaatkan metode RGB (red-green-blue) untuk mengetahui dimana arah persebaran abu vulkanik berdasarkan arah gerak angin. Hasil penelitian yang dilakukan, dapat dengan baik mendeteksi pola persebaran dari kolom abu vulkanik yang terjadi. Sehingga dapat diketahui wilayah yang berpotensi terdampak dari sebaran abu vulkanik. Selain itu deteksi abu vulkanik, dapat pula dimanfaatkan oleh sektor penerbangan, dan juga mempermudah pendataan kerugian sosial-ekonomi yang timbul akibat sebaran abu vulkanik.
APLIKASI SIG DALAM PENELITIAN GEOLOGI -, Emi Sukiyah
Bulletin of Scientific Contribution 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 (1306.726 KB) | DOI: 10.24198/bsc.v11i3.8294

Abstract

Explorative and descriptive are typical research of geology. Quantitative analysis is limited whereas cost research is expensive. Actually, there are some aspects of geology require quantitative analysis, mainly in vertical and lateral distribution. They need tool for do it.Several quantitative themes of geological research are slope analysis, erosion-sedimentation calculation, calculation of minerals proportion, calculation of chemical elements proportion, calculation of drainage density, calculation of fracture, etc. They need powerful tool for support data analysis with high accuracy.Many soft ware of data processor are available. They include graphical and non-graphical data. We can use that soft ware as tool for data analysis. Nevertheless, a part of them have limited in integrated data analysis. Commonly, Geographic Information System (GIS) soft ware can become choice. The available specification comprehension of soft ware can upgrade quality of data analysis.

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