Neogene sequence stratigraphic architecture of the Nile Delta,Egypt: A micropaleontological perspective |
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| Institution: | 1. Exploration Department, Egyptian Petroleum Research Institute (EPRI), 1 Ahmed Al Zomor St., Nasser City 11727, Cairo, Egypt;2. Steinmann Institut für Geologie, Mineralogie und Paläontologie, Rheinische Friedrich-Wilhelms Universität, Nussallee 8, 53115 Bonn, Germany;1. Mansoura University, Faculty of Science, Geology Department, Mansoura 35516, Egypt;2. Alexandria University, Faculty of Science, Department of Environmental Sciences, Alexandria, Egypt;3. Senckenberg Research Institute and Natural History Museum, Frankfurt am Main 60325, Germany;1. Geology Department, Faculty of Applied Science, Taiz University, 6803 Taiz, Yemen;2. Exploration Department, Egyptian Petroleum Research Institute (EPRI), Nasr City, Cairo, Egypt;3. Geology Department, Faculty of Science, Zagazig University, Al Sharkia, Egypt;4. School of Civil Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, Johor, Malaysia;5. School of Land Use and Environmental Change, University of the Fraser Valley, Abbotsford, Canada;6. King Saud University, College of Engineering-Petroleum and Natural Gas Engineering Department, Riyadh 11421, Saudi Arabia;7. Institute of Geological Sciences, Jagiellonian University, Gronostajowa 3a, 30-387 Kraków, Poland;8. Geology Department, Faculty of Science, Benha University, P.O. Box 13518, Benha, Egypt;1. Apache Exploration and Production Technology, USA;2. USA;3. Apache Egypt Company, USA;1. Department of Applied Physics and Astronomy, University of Sharjah, Sharjah, 27272, United Arab Emirates;2. Geologix Limited, Dynasty Building, Wing A, Level 4, Andheri Kurla Road, Andheri (E), Mumbai, 400059, Maharashtra, India;3. Geology Department, Faculty of Science, Suez Canal University, Ismailia, Egypt;4. Department of Earth Sciences, Faculty of Sciences, Ibn Zohr University, Agadir, Morocco;5. Faculty of Geography and Geology, Institute of Geological Sciences, Jagiellonian University, Gronostajowa 3a, 30-387, Kraków, Poland;6. Exploration Department, Gulf of Suez Petroleum Company, Cairo, Egypt;1. Petroleum Engineering Department, Faculty of Engineering, Future University in Egypt, Egypt;2. Geophysics Department, Faculty of Science, Ain Shams University, Egypt;3. Geophysics Department, Faculty of Science, Cairo University, Egypt |
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| Abstract: | The sequence stratigraphic architecture of the Neogene section from the subsurface Nile Delta is resolved based on exceptionally well-preserved microfossils from the offshore NDOB-1 borehole. The architecture is configured on bathymetry variations and statistical parameters as deduced from the relative abundance of foraminiferal associations. The statistical parameters include ratios of planktic versus benthic foraminifera, and cluster and correspondence analysis of the twelve most commonly used benthic foraminiferal genera as proxies of water depths. The combination of cluster and correspondence analysis was employed to decipher the evolution and dynamics of the basin and the mechanisms that controlled the deposition of Neogene sequences in the Nile Delta region. Four basic environmental settings were recognized: 1.) a middle to outer neritic eutrophic setting, 2.) a middle to outer neritic mesotrophic setting, 3.) an outer neritic to upper bathyal mesotrophic setting and 4.) an upper bathyal mesotrophic setting.Eight stratigraphic sequences were identified in the Neogene Nile Delta section. Three sequence in the Miocene (MSeq1, MSeq2 and MSeq3), three in the Pliocene (PSeq1, PSeq2 and PSeq3) and two in the Pleistocene (PtSeq1 and PtSeq2). These sequences are systematically measured and described in terms of time, space and water bathymetry. The sequence boundaries and flooding surfaces were dated using high-resolution microfossil biochronology and stratigraphic index markers. Individual sequences and boundaries were correlated with international and local sequence stratigraphic models. The new sequence stratigraphic model established here provides age calibrated surfaces for inter-basinal correlations and opens new avenues for hydrocarbon reservoir exploration. |
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| Keywords: | Nile Delta Stratigraphic sequences Benthic foraminifera Paleobathymetry Benthos/plankton ratio Hydrocarbon exploration Mediterranean Sea |
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