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Bulletin of Scientific Contribution : Geology

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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 8 Documents

Search results for , issue "Vol 5, No 1 (2007): Bulletin of Scientific Contribution" : 8 Documents clear

RUNTUNAN STRATIGRAFI SEDIMEN KUARTER KAITANNYA TERHADAP PERUBAHAN GLOBAL SIRKULASI IKLIM DAN TURUN-NAIKNYA MUKA LAUT DI LEPAS PANTAI BARAT KEPULAUAN KARIMATA (KALBAR) -, Herman Moechtar
Bulletin of Scientific Contribution Vol 5, No 1 (2007): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

The Quaternary sediments in the studied area can be divided into: (a)qollovial of basement rocks, (b)fine-grained of mass flows deposits, (c)coarse-grained of mass-flow deposits, (d)marine sediments, (e)beach deposits, (f)floodbasin deposits, (g)young marine sediments, and (h)marine Recent sediments. Furthermore, the Quaternary sediment consists of 2 (two) depositional cycles namely west Karimata cycle (SKB.1) and west Karimata cycle 2 (SKB.2).The development of the Quaternary sediments and basin fill in the research area was influenced by global events. Changes in climatological conditions between more humid and more dry, and relative sea-level changes affect marine and coastal depositional environments were included by global changes. The style of the mass flow deposits, is primarily the result of the palaeoslope on the basin, and lateral and vertical changes of environment systems were inflenced by regional or local condition of Sundaland character.

A FEW OF TURBIDITE CHARACTERISTIC FEATURE IN THE VICINITY OF BANTARUJEG -, Abdurrokhim
Bulletin of Scientific Contribution Vol 5, No 1 (2007): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

The traversing of Cilutung River exposes the sedimentary rock which is corresponding to turbidity system sedimentation. In around Bantarujeg area, the composite lithology is characterized by monotonous of poorly sorted tuffaceous sandstone interbedded with mudstone of classical turbidite; coarse grain of pebbly sandstone; interbedded tuffaceous sandstone and mudstone of slump deposits; disorganized pebble-coble-sized components of mud supported; massive sandstone and polymix breccia. A genetic unit based on sedimentary processes is more reliable in order to grouping the lithostratigraphic units.

KARAKTERISTIK KETEKNIKAN TANAH DAN HUBUNGANNYA DENGAN PENGEMBANGAN WILAYAH DI KAWASAN PENGEMBANGAN TERPADU - JATINANGOR, KABUPATEN SUMEDANG, JAWA BARAT -, Zufialdi Zakaria; -, Yuyun Yuniardi; -, Irvan Sophian
Bulletin of Scientific Contribution Vol 5, No 1 (2007): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Soil in research areal consist of CH (clay, high plastisitas) and MH. (silt, high plastisitas). Soil activity at area of Jatinangor is vary from low activity to high. But in general soil activity is hidh-medium. Activity number by Seed is A = 0.40 until 0.86 with nature mineral of kaolinitic until ilitic. Stability of slope can be designed as according to slope-stability design. At exposition slope, slope with angle 45o, two terrace and ground water level at - 2 M, high of slope 5 M and level off 5 M, Safety Factor = 2.094. Soil bearing capacity for square, circular & continuous foundations have medium-high activity show relationship that: Increasing of soil activity value cause decreasing of value of soil bearing capacity. Safety Factor of slope and soil bearing capacity is very supporting of environmental aspect in Jatinangor development area. Geological evaluation of development area is required to study both aspect (slope safety and bearing capacity).Environmental management is required before the rains arrive, because ground water rate will increasing at rainfall condition. It is required to manage negative impact. It is required to anticipate or eliminated its impact, or generating positive impact to be managed by improving it. Environmental monitoring is required to be instructed as anticipatory effort of damages or effect of negative impact.

SEJARAH PERKEMBANGAN GEOLOGI : DEFINISI, CABANG-CABANG ILMU DAN APLIKASINYA -, Agung Mulyo
Bulletin of Scientific Contribution Vol 5, No 1 (2007): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Istilah “Geology” berarti pelajaran tentang Bumi. Kata ini pertama kali digunakan oleh Richard de Bury (1473) sebagai nama lain untuk Ilmu Pengetahuan Bumi (Earthly Science), seperti halnya penggunaan istilah Theologi bagi mereka yang tidak setuju dengan nama Ilmu Pengetahuan Surgawi (Heavenly Science). Dengan demikian awalnya definisi geologi berarti merupakan ilmu pengetahuan alam untuk menjelaskan dan memecahkan berbagai masalah mengenai Bumi. Akan tetapi pada abad ke-20 berbagai disiplin ilmu berkembang menjadi spesialisasi yang didasarkan pada kesamaan objek kajiannya.

STUDI PROVENANCE BATUPASIR FORMASI - FORMASI DI CEKUNGAN OMBILIN, SUMATRA BARAT -, Euis Tintin Yuningsih
Bulletin of Scientific Contribution: GEOLOGY 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 geology.v5i1.8132

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

AKTIVITAS TANAH LAPUKAN BREKSI VULKANIK DAN IMPLIKASINYA TERHADAP KEKUATAN FONDASI DI JATINANGOR -, Irvan Sophian; -, Zufialdi Zakaria; -, Yuyun Yuniardi
Bulletin of Scientific Contribution Vol 5, No 1 (2007): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Jatinangor require public facility. The facility need strength of soil bearing capacity for stable foundation in occupying each soil mass. Soil type in this area is CH ( clay of high plasticity) and MH (silt of high plasticity). Based on diagram of Cassagrande, area research reside between U-line and A-line, and soil type generally is CH, clay high plasticity.At soil which have medium-high activity, allowable soil bearing capacitry ( qa) for continuous foundation is between 31.450 until 52.884 T/m2. Soil bearing capacity ( qa) with activity number (A) show negative relationship ( R - 0.804058). Increasing soil activity caused decreasing soil baring capacity.Instruction of Environmental Monitoring Plas is done especially monitoring at condition of house building and also other medium building like drainage channel and bridge etcetera. Environmental monitoring is required as effort to anticipate damages of arising out effect of negative impact. Small damage is properly attention or improve repaired before becoming is big.

PERUBAHAN KARAKTERISTIK ELEKTROMAGNETIK MENGGUNAKAN METODE GROUND PENETRATING RADAR HUBUNGANNYA DENGAN KARAKTERISTIK SEDIMEN BAWAH PERMUKAAN -, Andi Agus Nur
Bulletin of Scientific Contribution Vol 5, No 1 (2007): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Ground Penetrating Radar one of a Geophysics methods with principally to elektromagnetics wave reflection which is caused by changes of electromagnetics characteristics (contrast of material dielectric) in subsurface. The product data is a 2D profil that interpreted later from configuration reflection pattern on data to determine type of the sediment.

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

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.

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Muhammad Kurniawan Alfadli

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m.kurniawan@unpad.ac.id

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+6285669298592

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bsc.ftg@unpad.ac.id

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Muhammad Kurniawan Alfadli

Contact Email m.kurniawan@unpad.ac.id

Phone +6285669298592

Journal Mail Official bsc.ftg@unpad.ac.id

Editorial Address -

Location Kota bandung, Jawa barat INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Muhammad Kurniawan Alfadli

Contact Email
m.kurniawan@unpad.ac.id

Phone
+6285669298592

Journal Mail Official
bsc.ftg@unpad.ac.id

Editorial Address
-

Location
Kota bandung,

Jawa barat

INDONESIA