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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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KONDISI TEKTONIK RENCANA TAPAK BENDUNGAN PELOSIKA BERDASARKAN ANALISIS CITRA SATELIT DAN SISTEM INFORMASI GEOGRAFIS Sukiyah, Emi; Jaassin, Andi Makkawaru
Bulletin of Scientific Contribution 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 (509.301 KB) | DOI: 10.24198/bsc.v17i2.23010

Abstract

ABSTRAKBendungan Pelosika direncanakan memiliki kapasitas tampung air sebesar 822,26 m3 dengan luas lahan genangan 160.000 hektar. Keberadaan bendungan diharapkan dapat mengurangi debit banjir sebesar 10,359 m3/detik, menyediakan air baku dengan debit sebesar 0,20 m3/detik dan dapat membangkitkan listrik sebesar 10 MW. Konstruksi Bendungan tipe Rock Fill Dam berlokasi di Sungai Konaweha yang merupakan salah satu sungai terbesar di Sulawesi Tenggara. Irigasi untuk lahan seluas 20.040 Ha di Kabupaten Kolaka Timur dan Konawe diharapkan dapat terpenuhi. Geomorfologi lokasi rencana Bendungan Pelosika terdiri dari Pegunungan dan pedataran. Wilayah ini tersusun oleh batuan metamorfik berumur Paleozoikum dan endapan aluvium berumur Kuarter. Studi awal kondisi tektonik lokasi rencana Bendungan Pelosika menggunakan pendekatan morfometrik berdasarkan analisis indeks rasio lebar dan tinggi lembah (Vf) dan sinusitas muka gunung (Smf). Pengolahan citra satelit dan Sistem Informasi Geografis (SIG) digunakan dalam metode penelitian. Variabel morfometrik dan data indikasi tektonik diperoleh dari hasil pengolahan citra Landsat 8 OLI dan SRTM 30 m. Hasil analisis kelurusan geomorfologi menunjukkan arah umum UBL-STG yang berimpit dengan sesar-sesar yang ada di wilayah tersebut. Elevasi tertinggi berada pada 2.852 mdpl dan elevasi terendah -100 mdpl. Daerah Aliran Sungai (DAS) seluas 715.041 Ha dengan panjang total sungai sekitar 145,85 Km. Analisis morfotektonik pada empat lokasi terpilih menunjukkan nilai Vf antara 0,25 hingga 0,75 dan nilai Smf antara 1,06 hingga 1,17. Berdasarkan hasil analisis kedua variabel morfotektonik tersebut diketahui bahwa daerah rencana dudukan Bendungan Pelosika berada di daerah dengan kondisi tektonik menengah hingga aktif.Kata Kunci: Bendungan Pelosika, morfometrik, tektonik, citra satelit, SIGABSTRACTPelosika Dam is planned to have a water holding capacity of 822.26 m3 with an inundation area of 160,000 hectares. This dam is planned to reduce flood discharge by 10.359 m3 / second, provide raw water with a discharge of 0.20 m3 / second and can generate electricity by 10 MW. The Rock Fill Dam type of construction is located on the Konaweha River which is one of the largest rivers on the mainland of Southeast Sulawesi. It is also expected to be able to flow through irrigation of 20,040 hectares in the districts of East Kolaka and Konawe. Regionally, geomorphology is in the form of mountains and plain. The constituent rocks are Paleozoic metamorphic rocks and Quaternary alluvium deposits. The initial study of tectonic conditions of the Pelosika Dam site plan uses a morphometric approach based on the analysis of the valley width and height ratio (Vf) and sinuosity mountain front (Smf). Satellite imagery processing and Geographic Information Systems (GIS) are used in research methods. Morphometric variables and tectonic indication data obtained from Landsat 8 OLI and SRTM 30 m imageries processing. The results of the geomorphological lineament analysis indicate that the general direction is North Northwest - South Southeast which coincides with faults in the region. The highest elevation was 2,852 meter after sea level and the lowest elevation was -100 meter after sea level. Watershed covering an area of 715,041 hectares with a total river length of around 145.85 kilo meters. Morphotectonic analysis at four selected locations showed a Vf value between 0.25 to 0.75 and a Smf value between 1.06 to 1.17. Based on the results of the analysis of the two morphotectonic variables, it is known that the Pelosika Dam area designation is in an area with medium to active tectonic conditions.Key words: Pelosika Dam, morphometric, tectonic, satellite imagery, GIS
ZONA LAYAK TAMBANG BAHAN GALIAN NON-LOGAM KECAMATAN PAMONA, KABUPATEN POSO, SULAWESI TENGAH -, Geni Dipatunggoro
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 (1633.748 KB) | DOI: 10.24198/bsc.v11i1.8287

Abstract

Research at the Poso river Tentena – Sulewana segmen and Meko river, North Pamona district and West Pamona District, Poso regenc, Central Sulawesi Province. Rock there research area is river alluvial with the potential mining are sand and rock boulders, the mechanical laboratory of rock boulders of point load test result 207,005 – 744,797 Kg/Cm square, fullselment required for building material. Environmental condition of Poso river there are infrastructure for people housing, road of Poso – Tentena (Trans Sulawesi) and Poso Hydroelectric Power at the Sulewana village and the bridge, Meko river there are people housing and the bridge of Tentena Pendolo, and the forest and the many people garden. At the Poso river Tentena – Sulewana segmen sand can mine but the water level of river much be constant the water level of river much be constant until save the Poso Hydroelectric Power, at the Poso lake sand mining is problem with use the sump machin of sand until 20 meters depth, means the lateral pressure is not save to lake wall and to bellow the safety factor from 1,25 to 1,00 is critical condition, if there little tremble is sliding. At the Meko River there are bridge facility of road Tentena – Pendolo much be not disturb.
Sistem Pengolahan Air Limbah Domestik Berdasarkan Aspek Geologi Lingkungan Menggunakan Metode Simple Additive Weighting (SAW) di Kabupaten Kuningan Destirani, Sagita -; Suyono, Oon; Atang, .; Muslim, Dicky; Iskandarsyah, Teuku Yan W. M.
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 (3980.435 KB) | DOI: 10.24198/bsc.v16i2.17874

Abstract

ABSTRAKKabupaten Kuningan hingga saat ini belum memiliki Sistem Pengelolaan Air Limbah Domestik(SPALD). Pertimbangan untuk mengatasinya adalah dengan melakukan inventarisasi, survei danpemetaan geologi lingkungan. Dalam zonasi wilayah calon pengembangan, belum secaraoptimal ditentukan kondisi geologi setempat. Dilakukan penelitian ini yang bertujuan untukmengetahui parameter geologi lingkungan yang berperan dalam menentukan lokasi pembangunanpengolahan limbah yang sesuai standar dan prosedur, dengan mempertimbangkan segala aspek terutamageologi. Metode yang digunakan yakni dengan mengolah data sekunder menggunakan metode SimpleAdditive Weighting (SAW) untuk mendapatkan peta kesesuaian lahan yang selanjutnya akan dilakukantahap analisa dari overlay peta (superimposed). Parameter yang digunakan sebanyak sebelas parameter,terdiri atas parameter fisik dan non-fisik, dari hasil overlay peta maka akan didapatkan zona prioritasdengan proses skoring, yang merupakan salah satu metode yang membantu melakukan prediksiberdasarkan parameter yang telah disesuaikan. Didapatkan lokasi yang sesuai untuk pembangunan di limakecamatan, yakni Kecamatan Jalaksana, Cigugur, Kramatmulya, Kuningan, dan Lebakwangi. Penentuanlokasi lebih mendetail diperlukan untuk penentuan akhir pembangunan SPALD-T yang ideal.Kata Kunci: Pengolahan limbah, Simple Additive Weighting (SAW), Overlay, Scoring, KabupatenKuningan
PEMETAAN GEOLOGI NIKEL LATERIT DAERAH SP UNIT 25 DAN SEKITARNYA KECAMATAN TOILI BARAT, KABUPATEN BANGGAI, PROPINSI SULAWESI TENGAH -, Geni Dipatunggoro
Bulletin of Scientific Contribution 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 (1036.145 KB) | DOI: 10.24198/bsc.v8i3.8255

Abstract

The morphology of investigated area is a flat area and hilly area at elevation reaching 20 meters above the sea level. The lateritic nickel is a residual soil from weathering, resulting from serpentinite, hasburgite and dunite being ultramafic complex according to the geologic map of Batui sheets, Celebes.The extent of investigation is 8000 hectare as the permit from the regency of Banggai, and the thichness of nickel bearing lateritic soil averaging 2 meters, and therefore is roughly estimated 160.000.000 cubic meters. If the specivic gravity of lateritic soil is 2.6 and nickel content average 0.8 %, the reserve of lateritic nickel is will be 160,000,000 M³x 2.6 x 0.8% = 3,328,000 Tons. It is suggested to be mined by open pit method because the lateritic soil on the surface with only averaging thichness of soil 2 meters.
PERANAN ASPEK STRATIGRAFI DAN GEOLOGI DALAM MENGKAJI POTENSI GERAKAN TANAH DI KECAMATAN PELABUHAN RATU, KABUPATEN SUKABUMI Firmansyah, Yusi; Ganjar Gani, Reza Mohammad; Setiadi, Djadjang Djedi; Adycipta, Adycipta
Bulletin of Scientific Contribution Vol 15, No 1 (2017): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (579.928 KB) | DOI: 10.24198/bsc.v15i1.11995

Abstract

ABSTRAKPenelitian ini dilakukan untuk menilai potensi gerakan tanah yang mengacu kepada aspek-aspek geologi yang berkembang pada daerah penelitian. Secara astronomis daerah penelitian terletak pada 7o 0’ 3.15” – 7o 5’ 26.89” LS dan 106o 37’ 43.84” – 106o 43’ 10.28” BT, dengan dimensi 10x10 Km. Aspek geologi yang digunakan untuk mengidentifikasi pergerakan tanah antara lain geomorfologi, stratigrafi dan geologi struktur, selain dari ketiga aspek tersebut kami juga mempertimbangkan aspek tutupan lahan sebagai pemicu pergerakan tanah. Dalam menganalisa potensi pergerakan tanah metoda yang digunakan adalah skoring, dimana variabel yang akan digunakan diberi nilai dan dimasukan kedalam kelas-kelas. Dari hasil analisis potensi gerakan tanah, dapat disimpulkan bahwa daerah penelitian didominasi oleh zona stabil hingga kurang stabil. Sedangkan untuk daerah yang dianggap tidak stabil berada dibeberapa titik dari lereng sungai cimandiri yang juga merupakan zona sesar cimandiri dan sesar hegarmanah, dengan litologi batubeku andesit, batugamping dan alluvium.  Kata kunci : Longsor, Pergerakan Tanah, Pemetaan Geologi ABSTRACTThis study was conducted to assess the potential for ground movement, which refers to the geologic aspects of developing the research area. In astronomical research area lies in 7o 0’ 3.15” – 7o 5’ 26.89” LS dan 106o 37’ 43.84” – 106o 43’ 10.28” BT, with dimensions of 10x10 km. Geological aspects are used to identify the movement of the ground, among others, geomorphology, stratigraphy and geologic structure, apart from these three aspects we also take into consideration aspects of land cover as a trigger for ground movement. In analyzing the potential for ground movement is scoring method used, where the variables to be rated and incorporated into classes. From the analysis of the potential for ground movement, it can be concluded that the study area is dominated by stable to less stable zone. As for areas that are considered unstable are several points of the slope Cimandiri river which is also the fault zones and fault Cimandiri Hegarmanah, with lithology batubeku andesite, limestone and alluvium.  Keywords : Landslide, Soil Movement, geological mapping
THE INFLUENCE OF GEOMORPHOLOGY TO LANGUAGE VARIATION IN THE WESTERN PART OF JAVA, INDONESIA -, Evi Haerani; -, Dicky Muslim
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 (205.959 KB) | DOI: 10.24198/bsc.v6i2.8161

Abstract

In Indonesia, the western part of Java Island is known as a place with very diverse culture. There are 3 provinces in this region, namely West Java, Banten, and Jakarta Capital Special Region with more than 40 million populations. Sundanese is a main culture within this region, where focal area is around Bandung City. It is accompanied by 3 other subcultures, i.e. Cirebonese (around Cirebon City), Betawinese (Jakarta City and surrounding) and Bantenese (around Serang City).Geomorphological configuration of the study area is characterized by mountainous to coastal plain areas. It implies to the characteristic diversity of culture for every community including the development of local languages. This paper is aimed to map the relationship of local languages diversity (dialect) with their geomorphological conditions in the study area.Result of the study shows that Sundanese people commonly speak humble in polite manner and live on mountainous to hilly area. The Cirebonese speaks rather Javanese combined with impolite Sundanese and lives on the northern Java coastal plain as transition area between Sundanese and Javanese. Betawinese speak rather impolite and live on the coastal plain around Gulf of Jakarta. Bantenese speak rather impolite and live on coastal plain to gentle hilly area. This result suggests that there is relationship between the characteristics of utterances of people with the nature they live on.
KUALITAS BATUGAMPING BERDASARKAN ANALISIS KLASIFIKASI GEOMEKANIK DI GOA SEROPAN, GUNUNG KIDUL, YOGYAKARTA Nugroho, Bani; Pranantya, Pulung Arya; Utomo, Edi Prasetyo
Bulletin of Scientific Contribution 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 (1136.284 KB) | DOI: 10.24198/bsc.v14i1.9792

Abstract

Seropan cave is one of the caves in Semanu sub District, located in the karst region, Gunung Kidul, Yogyakarta. Based on reserach of Karlsruhe Institut of Teknology (KIT) German, is known underground river in the cave is very potential to be developed. Underground dams and micro hydro installations built to pump water upwards the river. These are used as raw water for daily needs and irrigation in the surface.  For this purpose it is necessary to study the stability of the rock mass in the cave Seropan. The stability of a tunnel or cave is heavily influenced by geological and non-geological factors. The most dominant geological factors in general are geological structures, can be muscular or fault, the type of rock and rock mass quality.The rocks at the cave Seropan in general are limestones. Based on rock mass classification of Rock Mass Rating (Bieniawski, 1989) otherwise known as the geomechanics classification, these rocks are included in class III and class IV. These rocks include moderate to bad quality. Until now the cave conditions remained relatively stable and secure. This is due to the naturally formed cave. The process of distribution of stresses around the cave coincided with the formation of caves and takes place in a relatively long time. However, in some parts of the cave should be because the effect of fractures can lead to collapse of the roof of the cave.
GEOLOGI BAWAH PERMUKAAN FORMASI CIKAPUNDUNG BERDASARKAN ANALISIS GEOLISTRIK DI DESA CIPICUNG, MANGGAHANG, KECAMATAN BALE ENDAH, KABUPATEN BANDUNG -, Undang Mardiana
Bulletin of Scientific Contribution Vol 4, No 2 (2006): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (938.356 KB) | DOI: 10.24198/bsc.v4i2.8124

Abstract

Sub-District Of Manggahang, District of Bale Endah have hilly and plain morphology with enough difference of height. Geologically is compiled by volcanic rock which consist of brecia, tuff, and lava which product of Old Volcanic. It is included in Cikapundung Formation which Middle Plistosen age (Silitonga, 1979) and lake sediment representing interval of fine clasticas clayey tuff, silty tuff, locality is found the existence of plant pickings, fine-coarse sandstone till with congelation rock fragment, this sediment is Quater age.Based on resistivity value, rock stratigraphy in study area have resisitivity which vary start from value set of Ωm (soil), tens of Ωm (brecia/tuff weathered), hundreds of Ωm (brecia-tuff), thousands of Ωm (lava 1), tens of thousand Ωm (lava 2), and hundreds of thousand Ωm (lava 3), third of him represent of andesitic lava (porfiry andesit at upper, and porfiry diorit at bottom).At high elevation covered by soil which thiner than foot-hill with spreading follow topography. Bellow of soil are interval of brekcia and tufa disseminating until assumption point GL - 02. and more thinning at foot area (to southern). Below interval of brecia and tuf, there are andesitic lava. At top hill, there is lava at 800 m elevation and in GL-02 having elevation 700 m. Hence if taken by elevation 700 m representing boundary of lower elevation, hence is andesitic lava from 100 m till 10 m.
KARAKTERISTIK BATUAN SEDIMEN BERDASARKAN ANALISIS PETROGRAFI PADA FORMASI KALIBENG ANGGOTA BANYAK Purasongka, Novianti Wahyuni; Syafri, Ildrem; Jurnaliah, Lia
Bulletin of Scientific Contribution Vol 13, No 1 (2015): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1482.72 KB) | DOI: 10.24198/bsc.v13i1.8382

Abstract

Administratively, the research areas included in the district of Semarang, Central Java Province. This research was conducted at Jeragung River with the object of claystone and sandstone. In physiographic, rocks in the study area are in Kendeng Basin, and parts of Anggota Banyak Kalibeng Formation. This study aims to determine the characteristics of sedimentary rocks mainly sandstones, based on petrographic analysis to determine the source of the sediment and diagenesis processes that formed. Based on observations of six sandstone samples from areas of research included in Feldspatic Wacke. Provenance analysis of six samples of sandstone with using Dickinson and Suczek triangles, shows the origin of sediment is arc magmatic. Diagenesis phase which occurs is eogenesis characterized by compacting and leaching, mesogenesis marked by cementation and recrystallization, as well as the replacement and deformation marks telogenesis process.
PENENTUAN STRUKTUR BAWAH PERMUKAAN MENGGUNAKAN APLIKASI GAYABERAT PADA DAERAH PANAS BUMI SOLOK Mayasari, Verna; Syafri, Ildrem; Haryanto, Agus Didit; Sugianto, Asep
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 (299.009 KB)

Abstract

Metode gayaberat dapat menggambarkan kondisi struktur bawah permukaan berdasarkanvariasi medan gravitasi bumi yang disebabkan oleh perbedaan densitas antar batuan di bawahpermukaan pada daerah panas bumi Solok. Hasil metode gayaberat berupa peta anomalibouguer, peta anomali bouguer regional, peta anomali bouguer residual beserta penampangyang akan memberikan gambaran keadaan batuan bawah permukaan. Hasil pemodelangayaberat menunjukkan liniasi kontur yang mengindikasikan struktur geologi berupa sesardengan arah baratdaya-timurlaut dengan nilai densitas batuan2.85 gr/cc yang berada padalapisan batuan vulkanik tersier. Penelitian ini diharapkan dapat memberikan pemahamanterhadap karakteristik anomali gayaberat dan membantu tahapan eksplorasi lebih lanjut. Kata kunci : anomali, bouguer, densitas, gayaberat, regional, struktur bawah permukaan,panas bumi.

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