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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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Sedimentary Record of Paleogene Sequences in the Penyu and Malay Basins, Offshore Peninsular Malaysia Franz L. Kessler; John Jong; Mazlan Madon
Berita Sedimentologi Vol 46, No 1 (2020)
Publisher : Ikatan Ahli Geologi Indonesia

The Eocene to Lower Oligocene deposits of the Penyu and Malay basins are formed by fluvial-lacustrine deposits with marine influence in the latter. The sequence consists mainly of siltstone, with several intercalations of fine-grained sand and volcanic tuff. Based on well data, Mid-Upper Eocene sediments exist in Penyu Basin in the deeper parts of the half grabens and sub-basins. Hence, this implies the age of basin initiation at Mid-Eocene, rather than Oligocene as traditionally and commonly stated in the literature. By correlation, and as seismic evidences show, Eocene sediments also appear to exist in the deeper, undrilled parts of the Malay Basin, again implying that at the latest, a Mid-Eocene age of basin initiation.In the Penyu Basin, aprominent near-Base Oligocene Unconformity can potentially be correlated to the Base-Tertiary Unconformity in the adjacent Malay Basin, however the latter term implies all Tertiary sequences, including potential Paleogene deposits above the unconformity. Besides, we also observe intra-Eocene unconformities, called the Top N and Top O. The presence of Eocene strata is likely associated with an early phase of extensional tectonism, and probably related to the onset of rifting of the South China Sea continental crust.

Biogenic Reworking of Tephra Layers in the South China Sea (Core MD972142) and the Celebes Sea (Core MD012388) Lowemark Ludvig; Chung-Hua Chen; Chih-An Huh; Teh-Quei Lee; Yuen-Ping Ku; Kuo-Yen Wei; Chih-Wei Chen; Tzu-Chien Chiu; Min-Te Chen
Berita Sedimentologi Vol 19, No 1 (2004)
Publisher : Ikatan Ahli Geologi Indonesia

Bioturbation in oxic deep-sea settings is mostly considered, if considered at all, to consist of a 2-10 centimeters thick homogenized layer. The mixing of the sediment in this layer results in a smearing of any environmental signals analyzed. A number of mathematical approaches have thereenfore been proposed to estimate the extent of this smearing and smoothing and to deconvolute the records back into the original signal. However, in most cases the mixing of the sediment is heterogenous process consisting of several palimpsest steps of bioturbation. In this study, using X-ray radiographs of two cores from the South China Sea and the Celebes Sea, we show that discrete traces such as Scolicia, Thalassinoides, and Zoophycos account for a significant part of the redistribution of the material in tephra layers. Particles may be transported vertically over tens of cm and concentrated into discrete aggregations. The composition of the traces preserved also can be used to estimate the intensity and potential hazard of deep-reaching bioturbation. Deep-reaching burrows consitute a serious threat to high-resolution stratigraphy. It is therefore recommended that X-ray radiographs should routinely be made before sub-sampling the cores for paleoceanographical and paleoclimatological studies, especially before AMS-14C dating.

The Distribution of Benthic Foraminifera in Indonesian Shallow Waters Suhartati M. Natsir
Berita Sedimentologi Vol 29, No 1 (2014)
Publisher : Ikatan Ahli Geologi Indonesia

Indonesia has diverse marine ecosystems, ranging from estuary, mangrove, seagrass beds, coral reefs, to deep sea, all suitable habitats for marine organisms. Many studies on the distribution of foraminifera in Indonesia waters have been conducted by the Research Center for Oceanography in Jakarta in recent years. Between 1994 and 2012 benthic foraminifera were recorded in environments ranging from estuary, mangrove, seagrass beds, coral reefs to deep sea. This study presents some of the results from several expeditions in shallow waters. Foraminifera were given special attention since there were relatively few records on the modern distribution of this group from Indonesia.Samples from estuaries contain higher numbers of agglutinated foraminifera in coarser sediments. Assemblages from near the river mouth of the Solo and Delta Porong Deltas of NE Java are dominated by Textularia spp., Haplophragmoides canariensis and Ammobaculites agglutinans. The waters of Handeuleum Islands off SW Java, with three types of ecosystems, are dominated by opportunistic benthic foraminifera, i.e. Ammonia beccarii. The most abundant benthic foraminifera are in fine sandy sediments collected adjacent to the mainland in areas characterized by coral reefs communities. Benthic foraminifera are less common in samples collected from seagrass beds with silty and muddy sediments. Coral reefs ecosystems studied at Jukung and Damar Besar Islands were dominated by symbiont-bearing foraminifera like Amphistegina, Calcarina, Heterostegina, Marginopora and Operculina.

Palaeontological surveys in Central Sumatra and Bangka Louys, Julien; Zaim, Yahdi; Rizal, Yan; Price, Gilbert J.; Aswan, Aswan; Puspaningrum, Mika Rizki; Smith, Holly; Hascaryo, Agus Tri
Berita Sedimentologi Vol 47, No 3 (2021)
Publisher : Ikatan Ahli Geologi Indonesia

We report on results from surveys undertaken in Sumatra during 2018 and 2019. The surveys had three objectives: (1) to examine, sample, and record the extensive Quaternary fossil deposits from caves in West Sumatra; (2) determine the potential for fluvial deposits in Riau and Jambi provinces; and (3) relocate the fossil proboscidean remains reported from Bangka Island. Our surveys produced several significant results. We mapped three important Padang Highland caves, Ngalau Lida Ajer, Ngalau Sampit, and Ngalau Gupin, locating and sampling the main fossil deposits in each, as well as recording additional caves in the region. Our surveys of the fluvial systems in central-west Sumatra did not reveal any vertebrate Pleistocene deposits but did yield Mio-Pliocene trace fossils. Finally, we relocated elephant fossils from Bangka, but no in situ vertebrate remains could be found. These finds add important new data to the geological history of Sumatra.

Book Review: Fine-Grained Turbidite Systems, AAPG Memoir 72 & SEPM Special Publication No 68 Berita Sedimentologi
Berita Sedimentologi Vol 15, No 1 (2001)
Publisher : Ikatan Ahli Geologi Indonesia

Case Study on Using Mundu-Paciran Nannofossil Zones (MPNZ) to Subdivide Mundu and Paciran Sequences in the MDA Field, East Java Basin, Indonesia Azhali Edwin; Kian Han; Wildanto Nusantara
Berita Sedimentologi Vol 26, No 1 (2013)
Publisher : Ikatan Ahli Geologi Indonesia

The Husky-CNOOC Madura Limited (HCML) MDA-4 exploration well (2011) in the Madura Strait region targeted Globigerina limestones in the Mundu Sequence (3.8 Ma) and the Paciran Sequence (2.0 Ma). The MDA Field is covered by Merpati 3D Seismic (2005). Seismic features observed from the 3D volume include phase change or polarity reversal at the top of gas filled reservoirs of the MDA structure and DHI flat-spot approximating to the gas-water contact (GWC). The reservoirs are primarily planktonic foraminifera grainstones, packstones and wackestones that have been deposited as pelagic rains and were subsequently redistributed by sea floor bottom currents.Differentiating the Mundu and Paciran Sequences relies heavily on biostratigraphy and chronostratigraphy, as there are no significant lithological features that can be observed between the sequences. This article introduces a method to construct detailed well correlations of the two sequences based on Mundu–Paciran Nannofossil Zones (MPNZ), using high resolution biostratigraphy events. The methodology uses varying nannofossil abundances in the interval NN18 (Late Pliocene) to NN11 (Late Miocene). The best reservoir performance in the study area may occur in the MPNZ-7 and MPNZ-6, which were deposited at the late stage of the depositional cycles.

Tacipi Limestone Facies Distribution and Sequence Development, Mio-Pliocene, South Sulawesi, Indonesia Alit A. Ngakan; Neil Harbury
Berita Sedimentologi Vol 5, No 1 (1997)
Publisher : Ikatan Ahli Geologi Indonesia

The tectonic evolution of Sulawesi is complex it is situated in the triple junction of the Indo-Australian, Eurasian and Pacific Plates. The late Cretaceous to Neogene history has resulted in considerable changes in the tectonic setting attributable to plate motions. Southern Sulawesi was a fore-arc region in the late Cretaceous with the deposition of a deep marine siliciclastic sequence; this evolved into a back arc setting in the Eocene, and a thick succession of volcanics of both acidic and basin composition were developed from Eocene to lower Miocene times. Following this volcanic phase carbonate sedimentation dominated in the Middle Miocene. This study documents the tectonic control on carbonate facies distribution (Tacipi and Walanae Formations) in the Middle Miocene-Lower Pliocene of southern Sulawesi.

Late Cretaceous Radiolarians from the Noni Formation, West Timor, Indonesia Munasri Munasri; Agus Handoyo Harsolumakso
Berita Sedimentologi Vol 45, No 1 (2020)
Publisher : Ikatan Ahli Geologi Indonesia

Late Cretaceous (Cenomanian–Turonian) radiolarian fauna was recovered from a single chert sample of the Noni Formation in the Miomaffo District of West Timor, which is generally viewed as part of the allochthonous ‘Banda Terrane’. This fauna is characterized by the presence of Cryptamphorella conara, Diacantocapsa euganea, Dictyomitra formosa, Dictyomitra montisserei, Guttacapsa biacuta, Stichomitra communis, Patelula verteroensis, Pessagnobrachia fabianii, Praeconocaryomma lipmanae and others. The character of the radiolarian fauna shows a close resemblance to those in South Sulawesi and is very different from age equivalent radiolarian faunas in the ‘autochthonous’ southern foldbelts of West Timor (Kolbano) and Timor Leste (Viqueque). This report on the Late Cretaceous radiolarians in Timor attempts to identify the fauna, to clarify its age, and to indicate the paleogeographic origin of radiolarian bearing chert of the Noni Formation.

Seismic Expression of Some Geological Features of Andaman-Offshore West Sumatra Subduction zone Herman Darman
Berita Sedimentologi Vol 20, No 1 (2011)
Publisher : Ikatan Ahli Geologi Indonesia

A subduction zone developed in the south of Myanmar, continued to the Andaman Sea (India), west of Sumatra and south of Java (Indonesia). Two major fault system developed parallel to the subduction zone, so called the Mentawai Fault System and Sumatra Fault system. To the north, where the subduction zone changes its orientation from NNW-SSE to NS, a spreading zone developed towards the east of Andaman Sea. This zone is a complex and active geological system. The 2004 Aceh Tsunami was a major disaster which was triggered in this subduction zone.The Andaman - Offshore West Sumatra subduction system is where part of the Indo-Australian oceanic plate moving northwards and going beneath the southern tip of Eurasian continental plate. Sumatra Island, which is part of Indonesian volcanic island arc, occurs parallel to and inland from the boundary between these two plates. An accretionary prism or wedge has formed from sediments that accreted onto the nonsubducting plate. Most of the material in this wedge consists of marine sediments scraped off from the downgoing slab of Indian oceanic plate with some erosional products of Sumatra volcanics. Fore-arc ridge in this system is a chain of islands (e.g. Andaman, Simeulue, Nias, Mentawai, and Enggano), formed by the accretionary wedge. A series of fore-arc basins developed between the accretionary ridge and the volcanic arc.This region is also an active petroleum exploration area. Recently, there are a number of companies (e.g. Spectrum, TGS and Geco) that provide new and reprocessed seismic lines to the market. These seismic lines show the geological features in this subduction system.

Biostratigraphy of the Late Miocene Halang Formation in the Loh Pasir Succession, Banyumas, Central Java Marfasran Hendrizan; Rubiyanto Kapid; Djuhaeni Djuhaeni
Berita Sedimentologi Vol 30, No 1 (2014)
Publisher : Ikatan Ahli Geologi Indonesia

A detailed biostratigraphic study was conducted to determine the spatial and temporal relationships between the Miocene Halang and Pemali Formations in Central Java. We studied calcareous nannofossils from a 1.4 km thick outcrop section of the Halang Formation at Loh Pasir to document biostratigraphic changes in the Banyumas area. The marine Halang Formation shows three types of lithofacies, predominantly mixed sandy and muddy in the upper part and muddy and sandstone facies in the lower part. We identified 57 species of 13 genera of calcareous nannofossils in 121 samples, which could be divided into five Late Miocene biozones. These zones are Discoaster brouweri, Discoaster hamatus, Discoaster bollii, Discoaster prepentaradiatus and Discoaster quinqueramus. Our results are consistent with previous biostratigraphic work in the Karanggedang 1 well location, except in the lower part of this formation, due to the lack of Catinaster coalitus in the Loh Pasir section.

Page 20 of 29 | Total Record : 282

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Home Page

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Editorial Address 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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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