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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 4 Documents
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Search results for , issue "Vol 33, No 1 (2015)" : 4 Documents clear
Indonesian Marine Geology Research Vessels: Their Capacity and Activity Ai Yuningsih; Wahyu Pandoe; Herman Darman
Berita Sedimentologi Vol 33, No 1 (2015)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2565.004 KB) | DOI: 10.51835/bsed.2015.33.1.111

Abstract

About two thirds of Indonesian territory is covered by sea, below which there is little-documented and fascinating geological features which require study. Observing and understanding this geology is obviously technically more difficult than for the onshore. Thus, knowledge of the submarine geology relies on research and commercial ships.The marine geology of Indonesia has been studied since the 18th century. Two French ships called Boudeuse and Etoile, and led by De Bougainville sailed to collect data in 1768. Since then many other research vessels came and were run by researchers from the UK, Austria, the Netherlands, USA, Germany and Japan. In late 1980s Indonesia bought its own research vessel, Baruna Jaya 1, and since then has built its own fleet of research vessels.
Making the Most of Biostratigraphic Data; Examples from Early Cretaceous to Late Jurassic Shallow Marine Sand Units in Papua New Guinea and Australasia Mike Bidgood; Monika Dlubak; Mike Simmons
Berita Sedimentologi Vol 33, No 1 (2015)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3678.769 KB) | DOI: 10.51835/bsed.2015.33.1.112

Abstract

A fundamental task in the exploration workflow is the mapping of reservoir sand units within a broader paleogeography. Such maps help, for example, to predict reservoir extent and link sands back to likely sediments sources thereby helping to improve reservoir quality predictions. If these sand units are multiple bodies within a relatively narrow time-stratigraphic interval, mapping of individual sands can be difficult if we rely on simple lithostratigraphic differentiation, or chronostratigraphic terminology (“ages”) for correlation.An example of this is shown from the Early Cretaceous to Late Jurassic shallow marine sands of southeast Papua New Guinea and Australasia. Previously correlated only on a broad timescale and often with overlapping age-range for individual lithostratigraphic units, it can be difficult to determine the precise stratigraphic position of each of these sands (e.g. the important Toro Sandstone reservoir) which in turn can affect interpretations regarding their exploration and production characteristics.The evaluation of large, public-domain, biostratigraphic datasets has allowed for the construction of a detailed “synthesis biozonation” for the area which permits more reliable identification and stratigraphic placement of individual sand units and which further allows for improved correlation at local and regional scale and improved mapping.
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3182.482 KB) | DOI: 10.51835/bsed.2015.33.1.114

Abstract

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.
Tertiary Uplift and the Miocene Evolution of the NW Borneo Shelf Margin Franz L. Kessler; John Jong
Berita Sedimentologi Vol 33, No 1 (2015)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (12443.149 KB) | DOI: 10.51835/bsed.2015.33.1.115

Abstract

NW Borneo, of which the shelfal margin extends from the West Baram Line in the southeast to the Balabac Line in the northwest, encompasses an area of active hydrocarbon exploration since the 1970’s. A large number of the earlier oil and gas finds are located in shelfal reservoirs of Neogene age. In this study, we portray the development of the Miocene shelf from the standpoints of stratigraphy, sea sea-level fluctuations, hinterland uplift and sediment recycling; mobile clay tectonics and, last but not least, the impact of the monsoon climate. Balancing the different viewpoints, we believe the transition from a muddy Mi Mid-Miocene shelf to an unusually sandy one can be attributed to two independent factors, which are:The rise of the Borneo part of Sundaland in the Middle to Late Miocene, caused by tectonic compression, in combination with the influence of the monsoon climate, andThe availability, through erosion of the Rajang/Crocker system, of massive amounts of sand delivered to the basin in geologically short time intervals.The Early to Mid-Miocene Cycle III/Stage III “Setap Shale” and other sediments in the Baram Delta appear characteristically lean in sand in most areas. The available data suggest that the first massive regional sand pulse originated at the same time in the Baram Delta, Brunei and Sabah, during Cycle IV/Stage IVA (Serravallian), post-MMU/DRU times. Continued sand supply established a shelf edge that remained almost stationary throughout Mid Cycle V/Stage IVC. As compression and uplift continued, the Middle to Late Miocene Cycles IV/V (Stages IVA-E) shelf saw local modification by hydraulic clay injection. During Cycles V/VI, and also in the Stages IVD-F, we see a further major expansion of the shelf. The question, as to which of these pulses can be linked to sea-level fluctuations, remains open; though it appears that the Borneo uplift has “outrun” rising sea-level at least since the Late Pleistocene.

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