Differentiating fluvio-marine depositional environments in the Nile Delta using textural and compositional components |
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| Institution: | 1. Coastal Research Institute, 15 El Pharaana St., Alexandria, Egypt;2. Geology Department, Faculty of Science, Alexandria University, Egypt;3. National Institute of Oceanography & Fisheries, Alexandria, Egypt;1. Department of Geology, Kyungpook National University, Daegu, Republic of Korea;2. Rural Research Institute, Korea Rural Community Corporation, Ansan, South Korea;3. Department of Earth System Sciences, Yonsei University, Seoul, South Korea;4. Division of Earth and Environmental Sciences, Korea Basic Science Institute, Choengju, South Korea;1. East Carolina University, Greenville, NC, USA;2. UNC Coastal Studies Institute, Wanchese, NC, USA;3. National Institute for Water and Atmospheric Research, Wellington, New Zealand;4. University of Washington, Seattle, WA, USA;1. Laboratory Water Energy and Environment (L3E ENIS), Faculty of Sciences of Sfax, Route de la Soukra km 4 – B.P. n° 802 - 3038, Sfax, Tunisia;2. Laboratory Water Energy and Environment (L3E ENIS), Higher Institute of Biotechnology of Sfax, Route de Soukra km 4 BP 261 3000, Tunisia;3. Laboratory Water Energy and Environment (L3E ENIS), National School of Engineers of Sfax, Route Soukra Km 3.5 B.P 1173-3038, Sfax, Tunisia;1. Department of Earth Sciences, School of Science, Shiraz University, Shiraz, Iran;2. Research Institute of Petroleum Industry (RIPI), Tehran, Iran;3. National Iranian Oil Company, Exploration Directorate, Seoul Ave., Tehran, Iran;1. UMR 8591 CNRS-Universités Paris I and Paris XII, Laboratoire de Géographie Physique, Environnements quaternaires et actuels, 1 Place Aristide Briand, 92195 Meudon, France;2. INRAP Nord-Picardie, 518 rue Saint Fuscien, 80000 Amiens, France;3. GEOTRAC / LSCE, Bât. 12, avenue de la Terrasse, 91198 Gif-sur-Yvette, France;4. UMR CNRS 7194, Muséum National d''Histoire Naturelle, Département Préhistoire 1, rue René Panhard, 75013 Paris, France;1. Department of Geology and Geophysics, E235 Howe-Russell Geoscience Complex, Louisiana State University, Baton Rouge, LA 70803, USA;2. Hess Corporation, 1501 McKinney St., Houston, TX 77010, USA;3. LSU Museum of Natural Science, Louisiana State University, Baton Rouge, LA 70803, USA;4. Paleobotany & Paleoecology, Cleveland Museum of Natural History, 1 Wade Oval Drive, Cleveland, OH 44106, USA;5. Coastal Studies Institute, Louisiana State University, Baton Rouge, LA 70803, USA;6. Department of Earth Science, 6100 Main St., Rice University, Houston, TX 77005, USA;7. ConocoPhillips, 600 N. Dairy Ashford Rd., Houston, TX 77079, USA;8. School of Oceanography, Box 357940, 1503 NE Boat St., University of Washington, Seattle WA 98195-7940, USA;9. Department of Oceanography and Coastal Science, 2165 Energy, Coast & Environment Building, Louisiana State University, Baton Rouge, LA 70803, USA |
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| Abstract: | Textural and coarse fraction compositional components are evaluated to distinguish samples from modern environments of the Nile Delta of Egypt. These environments include: river, coastal dune, accretion ridges, beach, neashore, lagoon and prodelta. In this study petrological variables (12 textural and 18 mineralogical, faunal and floral) were considered for each sample. Discrimination was achieved by using simple bar graphs of the raw data for each environment and Q-mode factor analysis. The factor analysis yielded four compositional assemblages: Factor 1 is dominated by terrigenous fine sand; factor 2 consists of biogenic mud; factor 3 contains terrigenous coarse and medium sands; and factor 4 comprises composite silty sand. Discrimination of the seven environments is generally good, with a lower resolution for beach, coastal dune and river sands.Having discriminating the examined environments using Q-mode factor analysis, a graphic model was constructed to help determine the origin of ‘unknown’ samples. As a test, this model is satisfactory in identifying and interpreting the origin of sediments of Holocene age from two additional cores recovered off the delta coast. |
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