Upper Cenozoic Calcareous Nannofossil Biostratigraphy and Basin Evolution of the East Java Basin Indonesia

• Material Type: 博士論文
• Title: Upper Cenozoic Calcareous Nannofossil Biostratigraphy and Basin Evolution of the East Java Basin Indonesia
• Author/Editor: RENDY
• Author Heading: RENDY
• Publication, Distribution, etc.: 秋田大学
• Publication Date: 2022-09-29
• Publication Date (W3CDTF): 2022-09-29
• Alternative Title: インドネシア東ジャワ堆積盆の上部新生代石灰質ナンノ化石層序と堆積盆発達
• Degree grantor/type: 秋田大学
• Date Granted: 2022-09-29
• Date Granted (W3CDTF): 2022-09-29
• Dissertation Number: 乙第660号
• Degree Type: 博士（理学）
• Text Language Code: eng
• Subject Heading: Calcareous Nannofossil; Biostratigraphy; East Java Basin; Unconformity; Basin Evolution
• Target Audience: 一般
• Note (General): The East Java Basin is one of Indonesian Cenozoic petroleum basin with fairproduction for over a century. The East Java Basin is extensively filled with carbonateand siliciclastic sedimentary rock since Eocene. Several studies exhibit comprehensiveexplanation of the depositional system of the East Java Basin during Cenozoic, most ofthe age of the sedimentary rock has not been well-dated and only a few researchers hadconduct precise age dating. Biostratigraphy of several exploration wells in the East JavaBasin also had been studied for both planktic foraminifera and calcareous nannofossilby. However, the areas studied are limited and some of the results have not indicatedthe high resolution. Based on that problem, the calcareous nannofossil biostratigraphyof LSM-1, JTR-1, BEL-1, TPN-1, KTB-1, and NGB-1 wells located in the onshore EastJava Basin, Indonesia was studied in detail to clarify the age distribution of sedimentaryrocks and the history of basin evolution of the onshore East Java Basin.Total of 678 cutting samples was selected every 20m interval and processed usingthe smear slide preparation method. All smear slides were examined under an Olympusbinocular polarizing microscope and quantitative analysis was employed. Graphiccorrelation also applied to derive precise biostratigraphic correlation.A total of 71 species from 26 genera of calcareous nannofossil were determinedin the seven wells, most of the specimens are found at moderate to good preservation.Reworked specimens from early Miocene series are sometimes observed in the Plioceneseries. The age assignment based on 27 calcareous nannofossil datum were obtained asfollow: DDR-1 corresponds to NN3-NN15 of the early Miocene to the early Pliocene.NGB-1 are appointed to NP23 to NN7 of the early Oligocene to the late Miocene. KTB-1 is assigned to NP25-NN16 of the late Oligocene to the late Pliocene. TPN-1 coversNN7-NN16 of the middle Miocene to the early Pliocene. BEL-1 is estimated as NN3 toNN5 of the early to middle Miocene. of JTR-1 is assigned to NP23-NN4 of the earlyOligocene to early Miocene. And the last, LSM-1 is estimated corresponding to NP25-NN16 of the late Oligocene to early Pliocene.The result from the biostratigraphic correlation analysis indicates that a total offour significant unconformities are traceable in the sequence between the Oligocene andthe Pliocene in this area. The Oligo-Miocene Unconformity (OMU) is situated in theOligocene/early Miocene boundary. The OMU, which is traceable to all wells, ischaracterized by the missing of the interval from NN1 to NN3 zone of the early Miocene.The Mid-Miocene Unconformity (MMU) is correlated to the early-middle Miocenewhich is found only in KTB-1 and NGB-1, since the calcareous nannofossil zone ofNN6 is not present in these wells. The late Miocene Unconformity (LM1), which ischaracterized by the missing of the interval NN8 of the early late Miocene is traceableto KTB-1, DDR-1, and TPN-1. The Mio-Pliocene Unconformity (MPU), which is thebiggest unconformity found in the study area, is situated in the lower Pliocene base. Inthis area, the lower Pliocene NN14 sediment is distributed above the MPU. The timegap of the MPU is the biggest in LSM-1 and BEL-1 located in the north western area.The interval, NN6 to NN13 of the middle Miocene to the lowest Pliocene is missing inLSM-1, and NN8-NN13 is also missing in NGB-1.Based on the bio-lithostratigraphic correlation analysis, the results indicate thatthe sediment above the OMU is situated relatively in the centre of the studied area (BEL-1 and TPN-1). In contrast with sediment of the Miocene above the MMU and LM1which are concentrated in the central to south-southeast area, the location of Pliocenesediment above the MPU moves to the north and north-western area. The depositionalpattern also demonstrates that the majority of sandstone and limestone deposition islinked to the distribution of unconformities, which are located just above them. Duringthe middle to late Miocene, there is no evidence of sedimentation in the north andnorthwest. The thickest sandstones, which are reservoir rocks of this oil field, iscorrelated to the early Pliocene Low System Tract and Transgressive System Tractabove the MPU.The stratigraphic series and unconformities detected in the study area show a goodcorrelation to the global climatic events and tectonic evolution. The Oligocene Series iscorrelated to the late Oligocene warm event. The Miocene Series unconformably overliethe Oligocene Series and fit to the Mi 1 cooling event. The early Miocene series abovethe Oligo-Miocene Unconformity is correlated to the Mid-Miocene climatic optimumevent. The Mid-Miocene Unconformity may be correlated to the cooling events Mi3 orMi4 just after the Mid-Miocene Climatic Optimum. The middle-late Miocene sequencebetween the Mid-Miocene Unconformities and the Late Miocene Unconformity 1 isconsidered a single transgressive-regressive cycle. The Late Miocene Unconformity 1is correlated to the cooling event of Mi5. The Mio-Pliocene Unconformity is correlatedto the Messinian Salinity Crisis event and RMKS Uplift. The upper-lower Plioceneseries above the unconformity is correlated to the mid-Pliocene Warm Period. Theseresults indicate that the stratigraphic evolution and formation of the unconformitiesdetected in the East Java Basin during upper Cenozoic are strongly influenced byeustacy sea-level changes, and then by tectonics, especially in the late Miocene to theQuaternary.
• DOI: 10.20569/00006115; https://doi.org/10.20569/00006115
• Persistent ID (NDL): info:ndljp/pid/12768876; https://dl.ndl.go.jp/pid/12768876
• Collection: 障害者向け資料
• Collection (Materials For Handicapped People:1): テキストデータ
• Collection (particular): 国立国会図書館デジタルコレクション > デジタル化資料 > 博士論文; https://dl.ndl.go.jp/collections/A00014
• Acquisition Basis: 博士論文（自動収集）
• Date Accepted (W3CDTF): 2023-04-07T23:08:37+09:00
• Format (IMT): application/pdf
• Access Restrictions: 国立国会図書館内限定公開
• Service for the Digitized Contents Transmission Service: 図書館・個人送信対象外
• Availability of remote photoduplication service: 可
• Periodical Title (URI): http://dx.doi.org/10.20569/00006115; http://hdl.handle.net/10295/00006115
• Data Provider (Database): 国立国会図書館 : 国立国会図書館デジタルコレクション; https://dl.ndl.go.jp

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