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Berita Sedimentologi

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Published by Forum Sedimentologiwan Indonesia

ISSN : 08539413 EISSN : 2807274X DOI : https://doi.org/10.51835/bsed

Core Subject : Science,

Earth & Planetary Sciences

BERITA SEDIMENTOLOGI aims to disseminate knowledge on the field of sedimentary geology to its readers. The journal welcomes contributions in the form of original research articles, review articles, short communications and discussions and replies. Occasionally, Berita Sedimentologi also includes field trip reports and book reviews, which are published only after going through peer-review processes. The main geographical areas of interest are Indonesia and SE Asia, however contribution from the rest of the world is also welcome. Berita Sedimentologi covers broad topics within sedimentary geology, particularly on depositional processes and their records in the rocks, petrology, sedimentology and stratigraphy of both siliciclastic and carbonate rocks; sequence stratigraphy, paleontology, biostratigraphy and sedimentary geochemistry. The journal also accepts articles on interdisciplinary research in sedimentary basin analysis, including large-scale basin geodynamics processes, mechanism of sedimentary basin formation, earth surface processes, sediment routing systems, petroleum geoscience and applied sedimentary geology analysis for mining and engineering geology.

Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Geologi

Articles 282 Documents

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Benthic Foraminifera in Marine Sediment Related to Environmental Changes off Bangka Island, Indonesia K. T. Dewi; N. Nurdin; Y. A. Priohandono; A. Sinaga
Berita Sedimentologi Vol 33, No 1 (2015)
Publisher : Ikatan Ahli Geologi Indonesia

Bangka Island is a famous tin island that lies offshore southeast of Sumatra. Tin mining has taken place both on land and from paleo-valleys under the sea by dredging or hydraulic method. Nearshore tin mining activities may have indirectly affected the environment, including marine organisms such as benthic foraminifera. The purpose of this study is to understand foraminifera in the sediment from offshore Sungailiat, Bangka Island as marine stress environment.A total of 25sea floor sediment samples were acquired by using a grab sampler at water depth between 6 and 26 meters.. About 300 foraminiferal shells were picked from each sample and then they were identified, calculated and documented. Some abnormal specimens were then analyzed by using EDX-SEM.The results show that there are more than 60 species which belong to 39 genera of benthic foraminifera in the study area and Rotaliida is the leading order. More than 50% of the foraminiferal shells have poor preservation or abnormal tests such as abraded, blackish, yellowish and brownish tests. Based on EDX analysis, these abnormal specimens are composed of Al2O3 (4-18%), Fe2O3 (8.87%), SiO2 (5-27%), K2O (1%), FeO (4-7%) and TiO2 (9.29%).The occurrence of abundant abnormal shells may be related to physical characteristics in the study area that are likely to affect the turbidity, nutrients and pollutants of the marine environment.

Magnetostratigraphy: A Summary Herman Darman; Edy Sunardi
Berita Sedimentologi Vol 8, No 1 (1998)
Publisher : Ikatan Ahli Geologi Indonesia

Magnetostratigraphy is the element of stratigraphy that deals with the magnetic characteristics of rock units, obtained by measuring the direction and intensity of magnetism in rocks of different ages. The magnetic characteristic most often used, however, is the polarity of magnetic remanence. The polarity is said to be "normal" (north-seeking magnetization gives a northern hemisphere pole, as today) or "reverse" (north-seeking magnetization gives a southern hemisphere pole). The polarity is established from isolating of the primary remanent magnetism of the sample, using paleomagnetic investigation.Magnetostratigraphy defines the sequence of geomagnetic polarity reversals recorded during deposition of a geological formation. This approach can be a very valuable technique for the subsurface correlation of marine and continental sequences and is the only correlation technique which is independent of any facies control. It provides an important complement to biostratigraphy for core correlating and dating. In general the rock magnetic stratigraphy involves the utilization of magnetic properties of sediments and sedimentary rocks as a means of (1) stratigraphic correlation, (2) identification of sediment sources and transport mechanism, (3) characterization/detection of paleoenvironmental change.

Seismic Expression of North Sulawesi Subduction Zone Herman Darman
Berita Sedimentologi Vol 22, No 1 (2011)
Publisher : Ikatan Ahli Geologi Indonesia

Sulawesi Sea and its surrounding area is an active tectonic region. Many studies were done to understand the tectonics in this area. For this reason, several seismic vintages were acquired in the Sulawesi Sea (Celebes Sea) area. The seismic lines were published in:1977 by Hinz: single multichannel reflection seismic (MRS) profile1979 by Hamilton: single trace reflection seismic lines1987 by Hinz and 1989 by Fechner: seismic data acquired by SONNE-cruise 49 in Mindanao area, at the eastern end of the Celebes Sea Basin.1994 by Zen and Hinz: seismic data acquired by SONNEcruise 94, sponsored by German institutions.1997, by Beiersdorf et al.: seismic data acquired by SONNE-cruise 98 which also did geological and geochemical investigations.This article shows the seismic expressions in the southern margin of the Sulawesi Sea, which is the subduction zone in the north of Sulawesi North arm and known as North Sulawesi Trench.

Temburong and Setap in Northwestern Borneo: Equivalent or Different Formations? H.D. Tjia
Berita Sedimentologi Vol 35, No 1 (2016)
Publisher : Ikatan Ahli Geologi Indonesia

Probing the Third Dimension of the Reef Complex at Kepulauan Seribu: A Proposal for Gathering Seismic Profiles and Cores of Holocene Sediments Berita Sedimentologi
Berita Sedimentologi Vol 10, No 1 (1998)
Publisher : Ikatan Ahli Geologi Indonesia

Integrated Data Services, Louisiana State University, and PT. Geoservices jointly announce their program of shooting shallow, high-resolution seismic profiles and trying these profiles with cores across the Kepulauan Seribu reef complex in the West Java Sea. The surface sediments of Kepulauan Seribu, 50 kilometers north of Jakarta, have been mapped in considerable detail; in addition, a few cores have been taken in shallow water reef environment. However, no deep-water coring nor shallow seismic data has been gathered to investigate the evolution of this modern reef complex. In fact, Holocene reef facies here sit atop equivalent Miocene Reef facies which produce at the giant Bima Field.This research program will gather a series of seismic profiles and take several cores along these profiles. All representative environments of deposition will be sampled with these techniques, including shallow- and deep-water settings. Companies are asked to participate in this program by taking part in data collection, in the sharing of samples, and in the funding of operational costs. A final report by the principal investigators will be distributed to participant companies.

New Insights into the Geological Evolution of Eastern Indonesia from Recent Research Projects by the SE Asia Research Group Watkinson, Ian M.; Hall, Robert; Cottam, Mike A.; Sevastjanova, Inga; Suggate, Simon; Gunawan, Indra; Pownall, Jonathan M.; Hennig, Juliane; Ferdian, Farid; Gold, David; Zimmermann, Sebastian; Rudyawan, Alfend; Advocaat, Eldert
Berita Sedimentologi Vol 23, No 1 (2012)
Publisher : Ikatan Ahli Geologi Indonesia

Eastern Indonesia has a prolonged, complex tectonic history. It is where the Eurasian, Indo-Australian, Caroline and Philippine Sea plates converge, and where processes such as subduction, obduction, slab rollback, rifting, supracrustal extension, lower crustal flow and exhumation are very young or still active.For these reasons, the SE Asia Research Group (SEARG) at Royal Holloway, University of London, has made Eastern Indonesia one of its major research themes in recent years. The SEARG has been conducting geological research in SE Asia since 1982. Work has been undertaken in Indonesia, Malaysia, Thailand, the Philippines, Vietnam and the South China Sea. In 2012 the SEARG is directed by Professor Robert Hall, and involves 12 postgraduate students, 2 postdoctoral researchers, a large number of academic staff, research associates and collaborators in the UK and overseas. The group is funded by a consortium of oil companies.Here we summarise recent and ongoing SEARG projects in Eastern Indonesia. Most of the projects are field-based, but they all also employ new data and techniques, such as 40Ar-39Ar, U-Pb dating (SHRIMP and LA-ICP-MS), Hf isotope dating (LA-MC-ICP-MS), UTh/ He dating, multibeam bathymetry, high quality seismic and remote sensing data.

Indonesia’s contribution in tracing the human ancestor Fachroel Aziz
Berita Sedimentologi Vol 47, No 3 (2021)
Publisher : Ikatan Ahli Geologi Indonesia

Since Darwin’s postulated the origin of the human species from an ape-like ancestor, the search for the missing link between ape and human had begun. In 1887, Eugene Dubois traveled from the Netherlands to Indonesia to search for the missing link. He eventually discovered human fossils in Wajak, Kedungbrubus, and Trinil to which he named Pithecanthropus erectus. The research was then continued by Ter Haar (1931) in Ngandong, Dujfyes, and his assistant, Andoyo (1936) in Perning, Mojokerto, and Von Koenigswald (1936-1940) in Sangiran, who successfully discovered many Homo erectus fossils. Since the 1960s, Sartono (ITB), T. Jacob (UGM), and Geological Research and Development Centre (Indonesia) continue the study, adding the collection of the specimens. Collaboration with the National Museum of Science and Nature, Tokyo concluded that Indonesian Homo erectus went through local evolution instead of static evolution condition. Indonesia is rich in natural resources and environmental conditions that were suitable for the evolution of early humans as shown by the discovery of several Homo erectus skeleton fossils that were not found in most other countries. This is a blessing left by early humans to us.

Calcareous Nannoplankton and Planktonic Foraminifera from the Neogene Offshore Northwest Borneo Shirley E. van Heck
Berita Sedimentologi Vol 16, No 1 (2001)
Publisher : Ikatan Ahli Geologi Indonesia

The sediments penetrated by hydrocarbon wells offshore NW Borneo consist mainly of Neogene clastics. Sedimentation rates are very high, resulting in a demand for high-resolution stratigraphy. As a result of often unfavorable environments and poor preservation, age diagnostic planktonic foraminifera and calcareous nannofossils are rare or absent in many wells. Although deepwater deposits are relatively rich in planktonics, compared to other areas the yield and preservation are poor.This paper describes the sequence of events (first and last occurrences) commonly encountered offshore NW Borneo, with indications of the reliability of the observed events.

Learning Biostratigraphy in University of Diponegoro, Semarang Lucky Agustina; Samuel Richard Natanael Simorangkir
Berita Sedimentologi Vol 31, No 1 (2014)
Publisher : Ikatan Ahli Geologi Indonesia

Biostratigraphy is a branch of stratigraphy, which focuses on correlating and assigning relative ages of rock strata by using the fossil assemblages contained within them. In Diponegoro University, Semarang, Central Java Province, we learn biostratigraphy in micropaleontology subject, in the 5th semester. In total there are 6 months per semester and we get approximately 12 classes given by the lecturers and 10 other classes given by the lecturer assistants in the laboratory. In the class, there are 100 students, taught by 2 lecturers Mr. Hadi Nugroho, and Ms. Anis Kurniasih. They are the lecturer in paleontology, with master degrees. The lecturer assistants in the laboratory are our senior students who were interviewed and selected by the lecturers.

Geological investigations of Sulawesi (Celebes) before 1930 van Gorsel, J.T.
Berita Sedimentologi Vol 48, No 1 (2022)
Publisher : Ikatan Ahli Geologi Indonesia

This paper is an overview of the early discoveries of the geology of Sulawesi, from the first naturalist expeditions in the 1820s until the 1930s. Most of the contributions to the knowleddge of the geology of Sulawesi during the Dutch colonial era came between the late 1880s and 1930, after which geological and mining investigations essentially stopped for four-decades. Before Indonesian Independence in the 1940s, Sulawesi island had been called Celebes, a name introduced by Portuguese explorers in the early 1500s.Geographically, Sulawesi is rather unique among the larger islands of Indonesia. Unlike the other three large islands Sumatra, Borneo and Java, Sulawesi has four ‘arms’, which are all surrounded by deep seas, and virtually the entire island is mountainous terrain without major rivers or delta systems. Active volcanism is limited to the eastern half of the North Arm and the lone Una-Una volcano in the Tomini Gulf, while Miocene and recently extinct volcanoes are present in SW Sulawesi.Geologic exploration was challenging. Surveys into uncharted territories before 1920 (before the arrival of detailed topographic maps, air photos and satellite imagery), required topographic surveying of all itineraries with chain and compass, and with a barometer for estimating altitudes.

Page 15 of 29 | Total Record : 282

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Home Page

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Contact Email minarwanx@gmail.com

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Journal Mail Official bs.fosi@gmail.com

Editorial Address Forum Sedimentologiwan Indonesia (FOSI) Komisi Sedimentologi Ikatan Ahli Geologi Indonesia (IAGI) Jl. Ciledug Raya Kav. 109 Cipulir, Kebayoran Lama, Jakarta Selatan, Indonesia

Location Kota adm. jakarta selatan, Dki jakarta INDONESIA

Abstract

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Contact Name
Minarwan

Contact Email
minarwanx@gmail.com

Phone
+6281908602813

Journal Mail Official
bs.fosi@gmail.com

Editorial Address
Forum Sedimentologiwan Indonesia (FOSI) Komisi Sedimentologi Ikatan Ahli Geologi Indonesia (IAGI) Jl. Ciledug Raya Kav. 109 Cipulir, Kebayoran Lama, Jakarta Selatan, Indonesia

Location
Kota adm. jakarta selatan,

Dki jakarta

INDONESIA