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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 5 Documents
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Search results for , issue "Vol 10, No 1 (2012): Bulletin of Scientific Contribution" : 5 Documents clear
KRONOSTRATIGRAFI CEKUNGAN KUTAI BAGIAN BAWAH, DAERAH BALIKPAPAN DAN SEKITARNYA, PROPINSI KALIMANTAN TIMUR -, Yuyun Yuniardi; -, Budi Muljana; -, Rahmat Fakhrudin
Bulletin of Scientific Contribution Vol 10, No 1 (2012): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2834.321 KB) | DOI: 10.24198/bsc.v10i1.8277

Abstract

Chronostratigraphy in lower Kutai Basin is very interesting to do research, in this area borders of chronostratigraphy need Paleontology Zone data and global tectonic. Chronostratigraphy in lower Kutai Basin divided into four part : Interval N2-N3, N4-N8, N9-N13, and N14-N21.
PERILAKU AKTIVITAS TANAH UNTUK MENDUKUNG INFRASTRUKTUR DI MAJALENGKA DAN SEKITARNYA -, Zufialdi Zakaria
Bulletin of Scientific Contribution Vol 10, No 1 (2012): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (779.739 KB) | DOI: 10.24198/bsc.v10i1.8273

Abstract

Physical development of the region will always be associated with infrastructure studies. Construction plans in Kertajati International Airport, will bring the study of the infrastructure related to public facilities, which supports the international airport in West Java. Including a study of infrastructures are the foundation for buildings, roads, bridges, buildings, dams, etc., also the slope which is the result of slope stability design. This study discusses the behavior of the activity of high plasticity clay (CH) toward safety factor of slope and soil bearing capacity. Safety factor of slope is represented by value of FS (Factor of Safety) with a specified slope angle, so the increasing soil activity (A) is known relationship with a decrease in the value of the slope safety factor (FS). Soil bearing capacity is represented by the value of qa (allowable soil bearing capacity) for square and circular foundation type, so that the relationship of soil bearing capacity is decreasing with increasing value of soil activity. The study is expected to be developed, to facilitate the safety factor is the estimated slope and soil bearing capacity estimated by examining the number of activity as an early indicator. The relationship between the allowable soil bearing capacity (qa) for shallow foundations (of a square type) with soil activity (Skempton, and Seed) shows the equation qa = 7.89890 A (-1.01759) a negative relationship with correlation coefficient R = - 0754, and qa = 8.81669 A (-0.83957) a negative relationship with correlation coefficient R = - 0722. The relationship between the allowable soil bearing capacity (qa) for shallow foundation (of a circular type) with soil activity (Skempton, and Seed) shows the equation qa = 7.80513 A (-1.06644) a negative relationship with correlation coefficient R = - 0780, and qa = 8.77028 A (-0.88473) a negative relationship with correlation coefficient R = - 0722, it indicates that bearing capacity land values decline with increasing soil activity. The relationship between the security factor (FS) with 15o slope angle A activity figures show the equation FS = 1.517 A -0.79 with R ² = 0.625; The relationship between the safety factor (FS) with 30o slope angle A activity figures show the equation FS = 1.721 A - 0.78 with R ² = 0.64. Handling of expansive soil can be through soil improvement. To planning the foundation and slope infrastructures, is required safe design in accordance with assessment of soil bearing capacity and Factor of Safety (FS) of slopes, in order to avoid design failure. 
PETROLEUM SYSTEM CEKUNGAN KUTAI BAGIAN BAWAH, DAERAH BALIKPAPAN DAN SEKITARNYA, PROPINSI KALIMANTAN TIMUR -, Yuyun Yuniardi
Bulletin of Scientific Contribution Vol 10, No 1 (2012): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/bsc.v10i1.8274

Abstract

Oil and gas potential in Lower Kutai Basin were probably exist, those condition have checked from well petroleum system to support oil and gas accumulation in this area. Data integration of source rock, reservoir rock, cap rock, trap assotiation, and migration system in Lower Kutai Basin could be doing advance research to proving oil and gas accumulation.
KARAKTERISTIK SEDIMEN DAN MIKROORGANISMA PERMUKAAN DASAR LAUT PERAIRAN MADURA BAGIAN UTARA -, Vijaya Isnaniawardhani
Bulletin of Scientific Contribution Vol 10, No 1 (2012): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (684.952 KB) | DOI: 10.24198/bsc.v10i1.8275

Abstract

Characteristics of the river basin in Citanduy landslide prone areas are showing behaviors that canThe study was conducted to investigate the characteristics of the sediment, particularly sediment texture, and the amount and spread of microorganisms (nannoplankton and foraminifera) at the seafloor surface sediments of the northern waters of Madura. Karaktersistik sediment analysis is intended to determine the sediment texture, as for the analysis of microorganisms to determine the abundance, genus and species or the dominant characteristic in this area and its relation to bathymetric position on the line pantai.Analisis dab dilakukanterhadap laboratory 15sampel seabed surface waters of the North Madura, with a depth range between 5-77 m. Based on sediment texture can be seen that the sediment is composed of clay, silt and clay lanauan pasiran, which generally contains shell fragments microorganisms. On the seafloor surface sediments can be determined 20 species of nannoplankton and planktonic foraminifera and 30spesies 16spesies Benton foraminifera, with an abundance of being. Abundance and diversity increased with increasing depth nannoplanktoncenderung and proximity to the shoreline. Abundance and keanekaragamanterendah around the northern coastline of the island of Java and Madura Strait. This is probably due to the influence of antripogenik in this area. Species that were found relatively evenly and always appear in each sample was Emiliania huxleyi and Gephyrocapsa Oceanica. Gephyrocapsa is found predominantly in samples around the shoreline. Planktonic foraminifera abundance and diversity tends to increase with increasing depth and distance to the shoreline. Globigerinoides ruber is very common. Benton foraminifera dominated by Rotalina. The common genus is Ammonia, Quinqueloculina, Spiroloculina, Triloculina, Asterorotalia, Cibicides, Cancris, Elphidium, and Textularia Pseudorotalia, which tend to be more abundant at sites located in the north (away from the beach). Cibicides showed maximum abundance in the relatively distant from the coastline. Ratio of the total abundance of foraminifera plankton foraminifera tend to increase with increasing distance to the shoreline and depth.
PREDIKSI ARAH PENCEMARAN AIRTANAH AKIBAT TEMPAT PEMBUANGAN SAMPAH AKHIR DI DAERAH SARIMUKTI DAN SEKITARNYA KABUPATEN BANDUNG BARAT, PROVINSI JAWA BARAT -, Bombom R. Suganda, T.; -, Yan W. M. Iskandarsyah; -, M. Sapari Dwi Hadian,
Bulletin of Scientific Contribution Vol 10, No 1 (2012): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (676.029 KB) | DOI: 10.24198/bsc.v10i1.8276

Abstract

Geomorphology of the study area consists of rolling hills with slopes relief of moderate to rough. Slope toward south and southeast. The landfill site of Sarimukti are on steep hillsides, 16-25% slope, flanked by a ridge and ridge Sarimukti Margaluyu. What the study is about 100-400 meters from the highway west Rajamandala-Bojongmekar, Cipatat, West Bandung. Drainage pattern in this area is dendrito-parallel. Volcanic sediments underlying the landfill site of Sarimukti is lapili-tuff lithologies of Cibeureum Formation. This rock unit has a thickness of up to approximately 28 meters, consists of sandy tuff rock-gravelly (lapilli) and results of its wheatering, ie clayey-silt. Mixing the components in the form of lapili fragments. Based on hydrogeology, Sarimukti landfill and surrounding area has two aquifer systems, which are composed by rock aquifer sandy tuff, clayey-silt soils at the top of the unsaturated zone (aquifer was depressed / free) and aquifer half depressed / half-free, which has silty clay layer on the top of which belong to the layer aquitard. In this area the clayey silt soil hydraulic conductivity value is 10-3 cm / sec, while the sandy tuff rock layers at the bottom has a hydraulic conductivity of 10-2 cm / sec. Based on the topographic contour map and analysis estimated that the flow of groundwater in the area of landfill site Sarimukti and surrounding consists of four flow direction, the direction relative to the southeastern slope (hydraulic gradient) + 20-40%, towards the east with a slope of +10%, relative southwestern direction with a slope of + 10-20%, and the south with a slope of + 10%. Groundwater contamination that occurred in Sarimukti trend indicated by a pattern of chloride and bicarbonate ion plume to the southeast. The pattern of the spread of contamination is influenced by the direction of the slope of the tuff rock layers beneath the landfill and groundwater flow direction is affected, as well as the content of clay minerals in the bedrock around the landfill site (in the example of rock / soil only reach 54%, so the conservative anions such as chloride can still be move freely). Therefore, the selection of the location of landfills in the area Sarimukti is not good enough if it is not offset by the implementation of the system and monitoring the landfill

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