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Berita Sedimentologi
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 6 Documents
 1 
Search results for , issue "Vol 28, No 1 (2013)" : 6 Documents clear
Mass Transport Complex (Mtc) Control on the Basin Floor Stratigraphic Succession and Sand Deposition: An Observation from Deepwater Brunei Herry Maulana; Harris Saifi Hakimi
Berita Sedimentologi Vol 28, No 1 (2013)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1090.615 KB) | DOI: 10.51835/bsed.2013.28.1.154

Abstract

Mass transport complexes (MTCs) are one of major geological features observed in many deepwater provinces, including in Deepwater Brunei, where MTCs are commonly initiated and deposited on the slope and basin floor settings. MTCs are broadly characterised on the basis of their internal characteristics and external morphological features. Posamentier (2004) offered a simple observational guideline for describing MTCs: 1) the underlying surfaces of MTCs usually are extensively scoured in a form of deep and linear grooves 2) the MTCs' overlying surface is mostly irregular - hummocky relief bounded laterally by gentle to steep flanks 3) MTCs often have transparent to chaotic seismic reflections, amalgamation of MTCs stacks is not uncommon, and 4) MTCs could have a morphology of channel or lobes.This guideline was utilised in describing the recent Brunei Mega MTCthough in much larger scale. This paper uses the same set of guideline to describe older MTCs observed in study area. We will also attempt to investigate MTCs' control on the overall basin floor stratigraphic succession and, in particular, sandstone deposition as it appears to be one of the key factors in delivering potential sands further into the basin floor.
Late Triassic Metatonalite from the Schwaner Mountains in West Kalimantan and Its Contribution to Sedimentary Provenance in the Sundaland Nugroho Imam Setiawan; Yasuhito Osanai; Nobuhiko Nakano; Tatsuro Adachi; Lucas Donny Setiadji; Joko Wahyudiono
Berita Sedimentologi Vol 28, No 1 (2013)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2491.878 KB) | DOI: 10.51835/bsed.2013.28.1.150

Abstract

This contribution presents petrography, geochemical characteristicc and LA-ICP-MS U-Pb zircon dating from metatonalites in the Schwaner Mountains of West Kalimantan. The metatonalites mainly consist of plagioclase, biotite, quartz, apatite, muscovite, and titanite with relict clinopyroxene surrounded by hornblende. The geochemical characteristics show that the rocks have calc-alkaline affinities and were derived from subduction-related arc tectonic environment. Some of the metatonalites have adakite signature, which suggests the Schwaner Mountains were not formed by a consecutive subduction system. The result of LA-ICP-MS U-Pb zircon dating reveals that the metatonalite has magmatic age at 233 ± 3 Ma (Late Triassic), which is the oldest magmatic age in the Schwaner Mountains. Therefore, it strongly suggests that the Schwaner Mountains has significantly potential for important sedimentary sources in Sundaland not only from Cretaceous age but also from Triassic age as well as Tin Belt granites from Malay Peninsula.
The Ethological Study of Glossifungites Ichnofacies in the Modern & Miocene Mahakam Delta, Indonesia Ery Arifullah
Berita Sedimentologi Vol 28, No 1 (2013)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1790.681 KB) | DOI: 10.51835/bsed.2013.28.1.155

Abstract

The Glossifungites facies is an ichnofacies which represents an assemblage of burrows that occur in firm, -not lithified- ground. Some geologists believe that the presence of a Glossifungites ichnofacies surface is an evidence of a break between erosion and deposition, which is a boundary of a sequence stratigraphic unit.Although firm ground assemblages are well understood, the Glossifungites ichnofacies concept generates some debates amongst geologists, because firm grounds represent intermediate gradational state between soft ground and hard ground. The level of compaction and dewatering of substrate are varies and controlled by different factors.Arifullah (2005) studied Glossifungites ichnofacies in East Kalimantan, which are common in both modern and Miocene Mahakam Delta system. The identification of Glossifungites ichnofacies in this study is based on ethology and morphological observation of the bioturbations.
Geohistory Analysis of South Makassar Peter Lunt; J.T. (Han) van Gorsel
Berita Sedimentologi Vol 28, No 1 (2013)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2042.005 KB) | DOI: 10.51835/bsed.2013.28.1.151

Abstract

A quantitative approach to stratigraphy shows how the south Makassar Straits Basin developed, and how the major sequences of sediment were deposited. After the initial rifting of the grabens there were four major, basin changing, unconformities that strongly affected sedimentation; at about 39 Ma (later Middle Eocene), 36 Ma (early part of Late Eocene), 34 Ma (almost on the Eocene to Oligocene boundary) and about 24 Ma (almost at the Oligocene-Miocene boundary).The 39 Ma event saw accelerated rifting on the distal margins of Sundaland, in the south and southeast. The 36 Ma event is very strongly expressed in the South Makassar area and is shown by the geohistory analysis to have included basement subsiding by as much as 2 kilometres in 2 million years. The 34 Ma event led to the onset of the Berai Limestone to the west and very strongly reduced rates of deep-water sedimentation throughout the Makassar to Spermonde area. The c. 24 Ma event saw a substantial change in sedimentary conditions, with the end of condensed deep marine clastics and shallow marine Berai carbonates, and the start of a new clastic phase with high rates of sedimentation. These times of major change are all thought to be controlled by tectonism, because their magnitude exceeds rates of eustatic change, and also because their geographic expression is highly variable.The first rift phase contains important lacustrine hydrocarbon source rocks in the inland areas of Sundaland, and large deltas with coaly sources on the fringes of the continent. The subsidence and associated sediment supply history has impact on the later deposition of coaly deltas, and the accumulation of overburden and thermal maturity of buried sediments.
Palaeocurrents and Provenance: Uplift History of the Meratus Complex, SE Kalimantan Duncan Witts
Berita Sedimentologi Vol 28, No 1 (2013)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1281.701 KB) | DOI: 10.51835/bsed.2013.28.1.152

Abstract

The Barito Basin in southeast Kalimantan contains a thick sedimentary succession of Middle Eocene to Pleistocene age. The basin is separated from the much smaller Asem-Asem Basin by the Meratus Mountains – a complex of metamorphosed arc and ophiolitic rocks that record the accretion of East Java-West Sulawesi to Sundaland in the mid-Cretaceous. The complex was later uplifted during the Neogene. The uplift had a profound effect on the basin architecture, developing a foredeep along the emerging mountain front, and creating the present-day hydrocarbon plays of the basin. Thus, understanding the history of the Meratus uplift not only provides insight into the tectonic evolution of the basin, but also the development of the hydrocarbon system. Previous estimates of the age of uplift range from Middle Miocene to Late Miocene. Consequently, linking the uplift to regional tectonics has remained speculative. This article gives a very brief summary of palaeocurrent and provenance data, and makes reference to palynology results, that collectively aid our understanding of the Meratus uplift. The data were collected along the western flank of the Meratus Mountains during field and provenance studies between 2009 and 2011, as part of a PhD at Royal Holloway University, London. Additional data were collected during recent fieldwork with BP Indonesia, in association with Institut Teknologi Bandung (ITB), Indonesia.
The Power of Palaeocurrents: Reconstructing the Palaeogeography and Sediment Flux Patterns of the Miocene Sandakan Formation in Eastern Sabah Jon Noad
Berita Sedimentologi Vol 28, No 1 (2013)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2933.686 KB) | DOI: 10.51835/bsed.2013.28.1.153

Abstract

Up until now the use of palaeocurrents as a primary tool in establishing regional palaeogeography and sediment dispersal patterns in the ancient has been limited. An outcrop study on the Miocene Sandakan Formation in eastern Sabah identified five facies belts, subdivided on the basis of sedimentological and palaeontological data. More than 140 outcrop sections were measured over an area covering approximately 200 square kilometres. The facies were interpreted to have been deposited in settings ranging from ancient mangrove deposits through shoreface sediments and out into the open marine.More than 200 palaeocurrent readings taken on these facies allowed a clear picture to be built up of the sediment dispersion patterns across the palaeo-Sandakan Basin, passing from northward directed flow through mangrove channels into a longshore drift dominated shallow marine, coastal shelf. This gave way northwards to a storm dominated belt of tempestite deposits cut by rip current channels. Flow through these channels, driven by frequent storms, was northward directed. Further to the north more quiescent, open marine, muddy conditions prevailed. A sediment budget can be estimated using the sand fraction of the various lithofacies identified during the study.

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