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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 7 Documents
 1 
Search results for , issue "Vol 14, No 1 (2000)" : 7 Documents clear
Geology and Nickel-Laterite Weathering Deposit in the Southeast Arm of Sulawesi Suratman Suratman
Berita Sedimentologi Vol 14, No 1 (2000)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2388.812 KB) | DOI: 10.51835/bsed.2000.14.1.256

Abstract

Nickel-laterite deposits are derived from ultrabasic bedrock after undergoing prolonged chemical erosion at a greater rate than mechanical erosion. In describing the origin of Ni-laterites, it is logical to proceed from a consideration of the bedrock type and their origin in order to define the occurrence and distribution in space and time, prior to determining favorable weathering environment and detail profiles of its mineralogical and chemical conditions.Principal occurrences of Ni-laterites in Sulawesi coincide with two northwest trending belts of ultrabasic rock and derived sediments. The first trend is the southwest belts from Sua-sua through Pomalaa and Torobulu to the island of Wawoni. The second trend is the northeast belt runs from Malili and Kolonodale at north end of the arm to Lasolo on the east coast. 
Host Rock Packaging in the Big Gossan - Kucing Liar Cu-Au Mineralization Type in the Grasberg-Ertsberg District, Papua Herman Setyadi; Wahyu Sunyoto
Berita Sedimentologi Vol 14, No 1 (2000)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5045.751 KB) | DOI: 10.51835/bsed.2000.14.1.257

Abstract

The Grasberg-Ertsberg Mining District is located in the highlands of the central range Jayawijaya Mountains of Papua (Irian Jaya) province, Indonesia. The Grasberg-Ertsberg District is one of the richest mining districts in the world. The district contains six known skarn and porphyry copper deposits with mineable reserves. Total 1999 proven and probable reserves in the district are 2.5 billion tonnes at 1.13% Cu and 1.05 g/t Au, dominated by the Grasberg super-giant porphyry copper-gold deposit (1.9 bt @ 1.04% u, 1.04 g/t Au).Kucing Liar and Big Gossan deposits occur in the stratigraphy contact of New Guinea Group and Kembelangan Group. The other skarn system occurs associated with the contact of New Guinea group and Ertsberg Diorite. This paper presents a review of the copper-gold mineralization appears in the sedimentary units and/or stratigraphic controls and its potential around the Grasberg-Ertsberg district related to this mineralization type.
Sediment-Hosted Lead-Zinc Deposits: The Existence in Indonesia S. Digdowirogo; S. Prihatmoko; H. Lubis
Berita Sedimentologi Vol 14, No 1 (2000)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2429.01 KB) | DOI: 10.51835/bsed.2000.14.1.253

Abstract

The best known Pb-Zn-(Au-Ag) deposits and occurrences in Indonesia such as Gunung Limbung-West Java, Tanjung Balit-Riau and Paleleh-North Sulawesi are believed to be epigenetic or intrusive-related and chiefly hosted by volcanic and intrusives. None of them is of economic interest, and this deposit type makes an insignificant contribution to the world Pb-Zn reserves. By contrast, the sediment-hosted Pb-Zn-Ag deposits play an important role as they contribute more than two third of world Pb-Zn reserves.Sedex, which is one class of the sedimen-hosted Pb-Zn-Ag deposits, has recently been identified in the Herald Resources Ltd - PT Aneka Tambang Persero (Tbk) joint venture area, in the Sopokomil prospect, Dairi, North Sumatra during a drilling campaign. The sediment-hosted Pb-Zn deposit has actually been defined in Kelapa Kambit, Belitung.
The Potential for Undersea Mining David Dekker; Raymond Binns
Berita Sedimentologi Vol 14, No 1 (2000)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2353.059 KB) | DOI: 10.51835/bsed.2000.14.1.258

Abstract

The deep sea floor offers new opportunities for minerals exploration. Recent discoveries of high-grade massive sulphide mineralization represent resources whose extent is still unknown. Ferro-manganese nodules formed on abyssal plains are of more modest grade, but very expensive in area. While it is likely that continental shelves may contain seafloor mineralization deeper than deposits already exploited in coastal areas by conventional dredging, the focus of this paper is the hydrothermal vents of island arc and back-arc areas and the abyssal plains of the deep sea. These hold promise of ore deposits quite different from those known of land. Environmental advantages in mining the sea floor include no impact on the surface environment and in some cases opportunities for disposal of tailings back on the seafloor.
Tin Exploration in Offshore of West Karimun-Kundur Island Nasir Umar; Armeyn Simatupang; Ichwan Azwardi
Berita Sedimentologi Vol 14, No 1 (2000)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1042.824 KB) | DOI: 10.51835/bsed.2000.14.1.254

Abstract

Karimun-kundur islands are located in Riau archipelago as a part of a tin belt which extends from Myanmar in the north through Malaysia, Singkep, Bangka, and Belitung island in the southern end. The Karimun-kundur islands are also a part of granite island chain that emerged within the tin belt. The dating from the granite indicates Upper Triassic age and since then a lot of tectonic activities have taken place creating large variation of structural features which then influence the deposition of Quaternary tin deposit. The tectonism was intensively occurred in Pre-Tertiary time which was predominated by compression due to subduction processes. This structuring later control the younger structures within the study area.In Western Kundur (Lalang island area), there are some small granite islands that act as the sedimentary source rock. Structural reconstruction of the pattern of these islands show plausible structural orientation which is also aligned with the bathymetry. The water depth tends to be deeper in the northern portion which indicates that the Lalang island area was previously a paleo high in the past.Geophysical surveys had been undertaken within the study area, such as seismic reflection and magnetic. The seismic data quality was not satisfactory due to shallow surface condition, whereas the magnetic survey provided a better outcome. The most plausible interpretation of the magnetic dataset revealed that the basement was formed by granitoid and metasediments.
Carlin-Style Sediment Hosted Gold Deposits Adi Maryono; Johan Arif
Berita Sedimentologi Vol 14, No 1 (2000)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3199.334 KB) | DOI: 10.51835/bsed.2000.14.1.259

Abstract

Disseminated gold deposits have been known as an exploration target since the early 1960s when the Carlin deposit was discovered in the Great Basin, northeastern Nevada. Gold deposits of this style are characteristically very fine-grained. They were considered to be too low to be mined economically.  low gold price and lack of processing technology to recover fine-grained gold from low-grade materials made this style of gold deposit unattractive.Development of processing technology for recovery of micron-sized gold and low to high bulk grade of the ore body has created an important exploration opportunity in the global gold search. Because of the ore body shape and metal distribution, many deposits of this style are amenable to open pit mining. These are the reasons why the average cash costs of most of sediment-hosted deposits are very competitive, which makes them an attractive target.A brief description in the following sections is mainly referred to some Carlin-style gold deposits in the Great Basin, Nevada, in which many researches have been done. In fact, it is the only Carlin belt, which is well known as one of the largest gold provinces and relatively well studied. Other less developed or under-explored Carlin trends may include South China Carlin trend in the Yunan Province and North Vietnam Carlin trend in the Caobang-Thai Nguyen-Lang Son Provinces, Vietnam.
Alluvial Tin Mining on Bangka Island Mark Csar
Berita Sedimentologi Vol 14, No 1 (2000)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2220.575 KB) | DOI: 10.51835/bsed.2000.14.1.255

Abstract

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