Ijesrt International Journal of Engineering Sciences & Research Technology Sedimentation of the Cantayan Formation in Sirnasari, Bogor, West Java-Indonesia (original) (raw)
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SEDIMENTATION OF THE CANTAYAN FORMATION IN SIRNASARI, BOGOR, WEST JAVA-INDONESIA
The study area is located in Sirnasari area, Tanjungsari District, Bogor Regency, West Java-Indonesia and geographically located at coordinates 6 o 36'30"-6 o 39'30" Longitude and 107 o 08'15 "-107 o 10'30" Latitude. Stratigraphy of the study area consists of five lithology units (from old to young), they are mudstone unit, breccia unit, sandstone-claystone unit, Basalt unit, and Alluvial unit. The mudstone Unit was deposited in the inner to outer neritic environment dominated by wave shore face mechanism. The breccia and mudstone-sandstone units were udstone unit is equivalent to the Cibulakan Formation, while breccia and mudstone-sandstone Unit is the equivalent of the Cantayan Formation. Turbidite facies which found in this unit are classic turbidite facies that consists of thinly-bedded and thickly-bedded sandstone, massive sandstone facies, conglomerates, and debris flow facies. The facies change reflected a change of deposition environment, which is influenced by sea level change at the time of deposition.
2019
Abstract. Research area is located on Candi Village, Todanan District, Blora Regency, Central Java, which is geographically 111010’30” – 110012’00” LS dan 6052’42” – 6055’00” BT. The area is about 12 km. Stratigraphy unit consists of four stratigraphy units. Tawun Formation claystone Unit was deposited on the late of Early Miocene. Ngrayong sandstone Unit was lying on it, deposited conformably on the early of Middle Miocene. Then on the late of Middle Miocene until the early of Late Miocene, Bulu Formation limestone Unit was deposited unconformably on middle neritic until outer neritic environment. Wonocolo Formation Marl Unit, then deposited on the Late Miocene. Geological structure found were anticline and strike slip fault, had been developed by N-S tectonic force since Pliocene until Pleistocene with a NW– SE and NE-SW trend. Uplift and erosional process then created nowadays morphology. Ngrayong Formation consists of quartz sandstone, claystone, and also limestone, divided by t...
Sedimentation Process of Rambatan Formation in Larangan Brebes, North Serayu Range, Central Java
Indonesian Journal on Geoscience
Rambatan Formation in the western part of North Serayu Basin, Brebes, Central Java, comprises generally flysch facies of turbidite sediments deposited in a deep marine environment. This formation is equivalent to Merawu Formation found in the eastern part of the basin and deposited in the environment of tidal flat to subtidal. The turbidite sediments were highly controlled by a rapid downward movement taking place continuously during Early to Late Miocene. The variation of the depositional environment has been the object of this research which aims to understand the sedimentation process of Rambatan Formation in this type locality with a modern turbidite approach. Rambatan Formation was deposited in N13-N19, as a deep marine sediment channel, turbidite, and deep marine tidal zone. The sedimentation was affected by gravity flow and bottom current. The sediments on N13-N14 were marked by turbidite sediments until Middle N17. The sediment supply increased on Middle N17, as a sediment filler on a channel marked by contourite mud layer (muddy slump) and debris flow, with sources from the north. The increase of sediment supply was followed by an environmental transformation from a deep marine channel into deep marine tidal area. In N19, the sediments were redeposited as turbidite sediment, starting with debris flow in Middle N18.
1994
The Bayah, Walat and Ciletuh Formations are Early Tertiary quartz-rich sequences in the Southwest Java Basin, Indonesia, which are individually exposed at different localities. The basin is situated in the fore-arc region of the present Sunda Arc system. A detailed evaluation of these formations is based on sedimentological, petrological and palaeontological approaches. It includes the evaluation of depositional environment, composition and provenance. The main objective of this research is to generate a more comprehensive palaeogeographic model and tectonic setting for the fore-arc during the deposition of each formation. It also includes the evaluation of coal seams, source rock potential and reservoir characteristics of some intervals in the studied formations. Palynological and foraminiferal data from the Bayah, Walat and Ciletuh Formations indicate that they were probably deposited contemporaneously during the Middle Eocene. Sedimentologically, the Bayah and Walat Formations ca...
This paper focuses on the Quaternary Baturetno Formation. An earlier research concluded that the black clay of the Baturetno Formation formed as a ‘palaeolake’ deposit. The ‘palaeolake’ was interpreted to form due to the shifting course of the Bengawan Solo Purba River in relation to Pliocene tectonic tilting in the southern Java. The stratigraphy of the Baturetno Formation was observed in the western part of the Baturetno Basin, and based on marker beds, the Baturetno Formation was classified into three units: (1) Gravel unit (GR) in the upper part, (2) clay unit (CU) in the middle part, and (3) sand-gravel unit (SG) in the lower part. There are floating gravel fragments of andesite, claystone, coral, and limestone with diameters of up to 10 cm in the clay unit. The particle size of sediment reflects the environment, but the lake deposition occurs under very quiet conditions. The occurrence of these fragments within the clay cannot be explained if the clay was deposited within a lake environment. The occurrence of floating fragments in the black clay of Baturetno Formation can best be explained through mudflow process. The cohesive strength of the mudflow is responsible for the ability of large fragments to float within the mud matrix. In general, the Baturetno Formation is inferred to be an alluvial fan deposit. The presence of sand, gravel, and mud are characteristics of alluvial fan deposits.
Deep-water Sedimentation of Southeast Asia
Proceedings of FOSI 2nd Regional Seminar, 2001
Aris Setiawan received his BSc degree in geology from Gadjah Mada University in 1990 and joined PT Elnusa Schlumberger after graduation. Since 1991, he joined VICO Indonesia, where he worked on various field development in Sanga-sanga Block, East Kalimantan. He received Master of Management degree from Atmajaya University in 1996. During 1996, he was assigned to work on regional venture with PT VICO Enterprises Indonesia. He pursues his Master degree in geology from the Monash University -Australia, with a research on tectonic evolution and extensional basin modeling, during 1997-1998. His research received 1997 PESA (Petroleum Exploration Society of Australia) Student Research Scholarship Award. Currently, he works as senior geologist for VICO Indonesia. His responsibilities ranging from integrated geology and geophysical interpretation for reservoir management of complex deltaic depositional facies. Aris is member of IPA, AAPG, IAGI and FOSI.
Depositional Model of Ngrayong Formation in Madura Area, North East Java Basin, Indonesia
Journal of Applied Geology, 2015
The early Middle Miocene Ngrayong Formation, an important reservoir of North East Java Basin, is well exposed in the central anticlinal part of Madura Island. The purpose of current study is to classify the depositional environments of the study area based on the characteristics and geometry of sedimentary facies. In the Madura island, the thicker clastics and deeper carbonates of Ngimbang Formation and Kujung Formation of Late Oligocene-Early Miocene deposited in the northeast-southwest asymmetrical half grabens. After the deposition of Kujung Formation, the basin morphology developed nearly eastwest trending shelf edge and the deposition of Tuban Formation began. The fine grained complex of Tuban Formation was followed by the Ngrayong Sandstones deposition. The depositional model of Ngrayong Formation is being producing of wide variety of depositional environments. Large scale cross-bedded sandstones and bioturbated massive sandstones with thin to medium bedded argillaceous limesto...
The Sedimentation of Lake Guyang Warak (Punung-East Java, Indonesia)
2008
Sedimentological investigation on the sediment from Lake Guyang Warak, Punung, East Java which is very near from a famous Palaeolithic Site, Song Terus Cave in Java Pacitan, has shown almost the same environment from at least 2000 BP. Although the environment is always the same, some variations caused by climate, volcanic activity and the most important part is by human activity can be recognized which is probably reflected by the carbon dating result.
Neogene Carbonate Sedimentation on Ontong Java Plateau: Highlights and Open Questions
Proceedings of the Ocean Drilling Program, 1993
Neogene ocean history is dominated by the theme of stepwise global cooling (with occasional reversals); the main trends of carbonate sedimentation on the Ontong Java Plateau show the regional response of productivity, dissolution, winnowing, and redeposition to this overall climatic change. The relative importance of these processes in controlling accumulation rates and carbonate content is difficult to assess for any given place and time. Thus, the outstanding feature of the carbonate record, the Tortonian-Messinian accumulation rate peak centered in the latest Miocene (maximum sedimentation rate >60 m/m.y.), is the product of a complex interplay of a general late Miocene to early Pliocene productivity maximum combined with increased mechanical and chemical erosion before and after the peak. The mix of erosional factors depends on the depth level considered and changes with time. Increased productivity apparently derives from high nutrient content in Pacific deep waters, caused by increased production of North Atlantic Deep Water (NADW) in the latest Miocene and basin-basin fractionation. Enhancement of the thermocline strength is indicated at that time from an increase in planktonic foraminifers living at intermediate depths. A fundamental change in the mode of productivity (toward pulsed productivity?) is indicated by changes in the coccolith flora. The main focus of this study is the definition of major patterns of sedimentation and associated open questions, as follows: 1. Carbonate records are parallel over a wide depth range. Does this mean that dissolution is also important on the upper plateau? Or is there a "conspiracy" of separate factors acting in concert? 2. Dissolution of carbonate cannot explain both carbonate and sedimentation rate patterns. The "loss paradox*' arises from the fact that carbonate percentages at different depths are so similar that the differences in carbonate are insufficient to account for differences in sedimentation rate, assuming that dissolution produces these differences. 3. Equatorial crossings have little or no effect on carbonate content or sedimentation rate. "Equatorial insensitivity" indicates that equatorial upwelling is of subordinate importance in biogenic sedimentation on the plateau in the late Neogene (as is the case today). 4. There is evidence for a general insensitivity of both carbonate and sedimentation rate records with regard to global changes in conditions, as seen in commonly used proxies. Changes in δ 18 θ of benthic foraminifers, for example, and sea-level changes (as mapped by sequence stratigraphy) are not clearly correlated with the main parameters of Neogene carbonate sedimentation on the plateau. Correspondence to the δ 3 C record is somewhat better, however. Proxies may be ill defined, or the regional overprint may obscure global relationships. The issues listed above are of a very general nature. Without a successful attack on these questions, the major patterns of carbonate sedimentation on the plateau will remain enigmatic, as will many phenomena associated with them, such as acoustic reflectors and hiatus formation. We tentatively put forward the hypothesis that the "master modulator" is the production of NADW, which affects productivity and carbonate dissolution simultaneously, through basin-basin fractionation. As NADW production is a nonlinear response to climatic forcing in a particular region (the Nordic realm), strong correlation with global proxies of change is not necessary. Other important ingredients of sedimentation history on the plateau are stepwise closure of tropical Pacific gateways (Indonesian and Panamanian) and the evolution of east-west asymmetry (warm water pileup in the western Pacific from increased strength of trade winds).