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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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Cover and Front Matter Berita Sedimentologi
Berita Sedimentologi Vol 48, No 1 (2022)
Publisher : Ikatan Ahli Geologi Indonesia

Cover and Front Matter

Mud Volcano in Southeast Maluku: Evidence for Neotectonics in East Indonesia Zaim, Yahdi; Ernawan, Budi; Fachrizal, Fachrizal
Berita Sedimentologi Vol 24, No 1 (2012)
Publisher : Ikatan Ahli Geologi Indonesia

Mud volcanoes are observed in S.E. Maluku, east Indonesia, in Babar, Tanimbar and in the Kai islands. They are active, show bubbles of flammable gases, mud flows and rock fragments, and except in the Kai Islands, are associated with melange complexes. They have also been reported to be present on Timor Island. The formation of active mud volcanoes in S.E. Maluku is closely related to the geology and tectonics of this region, and is due to subsurface overpressures forming liquefied shale that is extruded along thrust faults and fractured zones. The association of melange complexes and Quaternary fractured limestone terraces with mud volcanoes is closely related to the Quaternary and neotectonic activities in this region. Mud volcanism in this region is probably one of the main processes leading to the formation of chaotic deposits in the Quaternary in SE Maluku.

Bulungan Delta Clastic Wedges Winaldy Winaldy
Berita Sedimentologi Vol 12, No 1 (1999)
Publisher : Ikatan Ahli Geologi Indonesia

Most of the gas and oil fields within the greater N.E Kalimantan basin are discovered in Tarakan subbasin. The Tarakan subbasin, the most productive subbasin, developed significantly during Middle Miocene to Pliocene when accommodation space for an increased volume of deltaic sediments was created due to a combination of basin subsidence and gravity induced listric faulting. However, the uplift of the western basin margin that had begun after Late Early Oligocene and continued into Miocene created shallower depositional conditions in the northern part of the basin (Tidung and Tarakan subbasins). The newly emergent area to the west formed constructive deltas that prograded from west to the east. Nevertheless, in the southern area (Berau and Muara subbasins) the depostion was under stable condition whereby platform carbonates and deeper marine sediments filled the region.

Tracing the Provenance of the Devonian Limestone of Telen River, East Kalimantan Herman Darman
Berita Sedimentologi Vol 47, No 1 (2021)
Publisher : Ikatan Ahli Geologi Indonesia

H. Witkamp found an outcrop with Devonian Limestone in East Kalimantan in 1925. In 1989, an expedition run by Institute of Technology Bandung (ITB) reinvestigated the outcrop and concluded that the Devonian Limestones in Telen River were boulders within a Permian formation. This paper gives a wider overview on the distribution of Devonian rocks in Asia Pacific region and discusses their possible origin.Based on the distribution map of Devonian rocks in the region, the Devonian limestone in Borneo is very isolated. The closest Devonian limestones are about more than 2000 km away. Probably the Devonian limestone in Telen River has been separated away from its origin by significant tectonic movement. There are several theories and models related to the formation history of this area, which makes it very complex. To understand the origin of these limestones, the geology needs to be restored to their time and place of deposition of the Devonian limestone.

Unravelling Salt Structural Evolution: Case Study from West Africa Nila Murti
Berita Sedimentologi Vol 18, No 1 (2003)
Publisher : Ikatan Ahli Geologi Indonesia

The offshore area of Guinea Bissau is part of the Mauritania-Senegal Basin that forms a part of Mesozoic-Cenozoic basin in the Central Atlantic passive margin of West Africa. Its geological history reflects the evolution of the Atlantic Ocean. The area is also located in one of the salt basins in West Africa, with a syn-rift salt sequence or Triassic-Early Jurassic age. The sequence formed various salt structures, which provide potential hydrocarbon trapping mechanisms. To reveal the distribution and evolution of the salt structures in the Offshore Guinea Bissau will lead to the better understanding of interaction between the sediments and the structures. The study will also give explanation for reservoir distribution, the timing of trap formation and the shape of salt structures, hence helping to better locate the prospects in hydrocarbon exploration activity.

Stacked Digital Imaging of Foraminifera Peter Lunt
Berita Sedimentologi Vol 29, No 1 (2014)
Publisher : Ikatan Ahli Geologi Indonesia

This paper describes a technique of imaging foraminifera by combining a series of digital photographs in automated software to produce a single optical image with high resolution and superior depth of focus. Results can be obtained that are nearly as good as low-power SEM images, but have the great advantage of showing the hyaline tests as they appear to the working eye under a binocular microscope, as the foraminifera do not need to be coated in gold.Digital imaging should be utilised more in documentation of foraminifera. The benefits of a low-cost and easy method of imaging include faster learning of new faunas, leading to more consistent species concepts. Workers can now publish fully illustrated works on complex morphometric series. Commercial service companies can now illustrate important taxa / faunal components and emphasise good micropalaeontological data in a way that the written word cannot.

Marine Expeditions in Indonesia during the Colonial Years Herman Darman
Berita Sedimentologi Vol 32, No 1 (2015)
Publisher : Ikatan Ahli Geologi Indonesia

During the colonial years there was little support from the Netherlands government for non-applied scientific work. The colonies had to pay for themselves and had to be profitable for the Netherlands; science was not considered to be a good investment. Nevertheless, a number of important oceanographic expeditions took place, for example, the Siboga and Snellius expeditions. Both were named after the ships that carried the scientists and both were paid for by the Netherlands government. The objective was to prove that the Dutch Indies were not only the best governed, but also the scientifically most developed tropical colony. Moreover there were the Dutch who needed to consolidate colonial rule by showing the flag over the whole archipelago. Germans, British, Americans and Japanese were encroaching on the Far East (New Guinea, Philippines, Malaysia and Taiwan) and in some ways the expedition can be considered as ‘gunboat science’. Even so, vast amount of prime oceanographical, hydrographical, biological and geological data were collected with state-of-the-art equipment.

Evolution and Facies Architecture of A Himalayan Cretaceous Forearc Basin G. Einsele et al.
Berita Sedimentologi Vol 7, No 1 (1998)
Publisher : Ikatan Ahli Geologi Indonesia

The mid-Cretaceous to Eocene flysch deposits of the Xigaze forearc basin in southern Tibet were investigated in a 120 km segment along the Indus Yarlung suture zone. The basin evolved south of the magnetic arc (Gangdise belt) of the Lhasa block on top of trapped oceanic or transitional crust.

A Field Trip Report: An Overview of the Paleomorphology and Paleogeography of Tortonian–Messinian Carbonates in the Almería-Níjar Basin, Southern Spain Minarwan Minarwan
Berita Sedimentologi Vol 22, No 1 (2011)
Publisher : Ikatan Ahli Geologi Indonesia

Southern Spain is famous for its beautiful beaches that usually receive a flock of Spanish and European tourists during the summer. The region has Mediterranean climate without much rain but a lot of sunshine for majority of the year. It has mild and wet winter but in some places it can be very dry and has limited vegetation cover only. The climate is a contributing factor to the preservation of spectacular rock outcrops, which provide beautiful landscapes, outstanding scenes, and more importantly, valuable field laboratory to learn sedimentology and stratigraphy. One such region is Almería Province that has several small basins, including the Almería-Níjar Basin.The Almería-Níjar Basin has extensive outcrops of Upper Miocene carbonate complex that lie on the foothill of Sierra Alhamilla and also along the coast. Recently, a group of geoscientists from Repsol visited some of the Upper Miocene carbonate outcrops to see their large scale geometries and then to get a closer look at their lithofacies. The visit was aimed mainly to observe paleomorphology that can be used as analogs for seismic interpretation purpose. The Upper Miocene carbonate outcrops of the Almería-Níjar Basin are unique because their present geometries are still similar to their paleomorphologies during the time of deposition.

Microfossil as proxy for palaeoclimate and palaeoceanography Maryunani, Khoiril Anwar
Berita Sedimentologi Vol 47, No 3 (2021)
Publisher : Ikatan Ahli Geologi Indonesia

Recent global warming has been addressed due to human activity that causes increased greenhouse gases. However, there are inherent uncertainties in the statement, one of them is the level of natural variability inherent in the climate system. Climate data from measuring instruments are not long enough to evaluate climate variability and current climate evolution. Therefore, we need climate data that has a long back span. To get adequate past climate data, we need natural phenomena which are climate dependent. This natural phenomenon provides a proxy record of the climate. This study of proxy data is the foundation of palaeoclimatology and paleoceanography. Microfossils (i.e., foraminifera, palynomorphs, nannofossils) which in geology are used as a standard tool in biostratigraphy for both age determination and paleoenvironment and correlation, can also be used as a proxy for obtaining paleoclimate and paleoceanography data. Using microfossil as a proxy to study past climate and paleoceanography, we need an understanding of the type of proxy data available and methods used in their analysis.In addition to the dating method (biostratigraphy), there are many climate and oceanography parameters that can be obtained from microfossil proxies such as: sea surface temperature (SST), sea surface salinity, (SST) climate (warm, cold, dry, wet), precipitation, productivity, oxygen content and organic carbon level, deep sea current and ventilation/upwelling, thermocline and mixed layer, variability deep water properties, CCD, bathymetry, sea level change and dissolution. The methods to obtain data fall into some categories e.g., faunal/floral displacement, morphology changes, transfer function/modern analog and isotopic content. Another method that can be used is observing microfossil assemblages and link them to ecological changes associated with climate change and its paleoceanography.A paleoclimate and paleoceanography study using microfossil proxies has been conducted in the Cendrawasih bay, Papua, Indonesia. The study shows that climate in the tropical west Pacific margin (Cendrawasih bay) during Late Pleistocene to Holocene shows high variability. There are nineteen climate changes occurred during Holocene. Early Holocene dated as ca. 11,800-year BP marked by rapid warming with SST differences to last glacial is about 4oC. Early to Middle Holocene (ca. 5960-year BP) marked by increasing temperature up to 2oC, interrupted by cooling at ca. 11230-, 8310- and 7120-years BP. At Middle Holocene temperature decreased rapidly and reached its peak at around ca. 3150-year BP. After cooling at ca. 3150-year BP, temperature increased and then decreased with its peak at ca. 1710-year BP. Since ca. 1710-year BP to Recent, temperature shows warming trend. SST from MAT indicates warming environment near to 1.5oC. The warming trend was interrupted by rapid cooling and warming at ca. 300-year BP. This last warming trend indicates that global warming had started before industrial era and rapid cooling, or warming can occur without anthropogenic gases influence. The typical Holocene climate of warm-wet, dry-cold reverse and become warm-dry, cold-wet during ca. 790-370-year BP and then reversed back to preceding state.Semi-restricted basin occurred since last glacial with anaerobic condition and estuarine circulation system. Warming during interstadial 1e-1a, causing reverse water circulation and basin become sub-aerobic with anti-estuarine circulation. A lot of terrestrial organic matter flow to the bay and increase acidity and carbonate dissolution. High sedimentation found occurred during glacial period especially at the end of glacial period. Rapid warming during late glacial to middle Holocene, rising relative sea level and the bay become more open marine with well oxygenated bottom water and high marine productivity. Warm temperature and deeper thermocline depth (~ 250 m) in west Pacific occurred up to ca. 5960-year BP. Decreasing Sea surface temperature at ca. 5960-year BP and drop of relative sea level causing sub-aerobic condition inside bay. The semi-restricted state with sub-aerobic condition occurred up to Recent.Distribution of Sphaeroidinella group in the tropical west Pacific shows strong correlation with thermocline depth and reflect El Niño frequency event. Early middle Holocene dominated by La Niña-like condition and since Middle Holocene (ca. 5960-year BP) frequent El Niño event began to occur.

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

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Home Page

OAI Link

Editorial Team

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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

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