Diagenetic signatures in the deltaic and fluvial-estuarine Messinian sandstone reservoirs in the Nile Delta as a tool for high-resolution stratigraphic correlations |
| |
| Institution: | 1. Geology Department, Faculty of Science, Mansoura University, Mansoura, Egypt;2. Department of Earth Sciences, University of Geneva, Geneva, Switzerland;3. Department of Geosciences, Texas Tech University, Lubbock, TX, USA;1. Geology Department, Faculty of Science, Port Said University, 42522, Egypt;2. Department of Physical and Environmental Sciences, College of Science, Texas A&M University-Corpus Christi, 6300 Ocean Drive, Corpus Christi, TX, 78412, USA;3. Geology Department, Faculty of Science, Cairo University, Egypt;4. Exploration Department, Gulf of Suez Petroleum Company, New Maadi, Cairo, 11742, Egypt;1. Geology Department, Faculty of Science, Helwan Uni, Cairo, Egypt;2. Technical Affairs and Business Development Department, Misr Phosphate Company, Egyptian Ministry of Petroleum, Cairo, Egypt;3. Misr Phosphate Company, Egyptian Ministry of Petroleum, Cairo, Egypt;1. Department of Geology, Faculty of Science, Ain Shams University, Cairo, 11566, Egypt;2. Apache Khalda Corporation LDC, Egypt;1. Department of Earth and Environmental Sciences, Bahria University Islamabad, Pakistan;2. Department of Earth Sciences, Quaid-i-Azam University, 45320, Islamabad, Pakistan;3. Center for Integrative Petroleum Research, College of Petroleum Engineering and Geosciences, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia;4. Faculty of Geography and Geology, Institute of Geological Sciences, Jagiellonian University, Gronostajowa 3a, 30-387, Kraków, Poland;1. Geology Department, Faculty of Science, Damietta University, New Damietta, Egypt;2. Department of Petroleum Geology and Sedimentology, Faculty of Earth Science, King Abdulaziz University, Jeddah, Saudi Arabia;3. Geology Department, Faculty of Sciences, Menoufia University, Egypt;1. National Research Institute of Astronomy and Geophysics, Helwan, Egypt;2. Geology Department, Faculty of Science, Mansoura University, Egypt |
| |
| Abstract: | The current study utilizes a range of diagenetic fingerprints to differentiate between sandstone facies deposited in the Nile Delta before and during the Messinian salinity crisis (MSC), which is normally a challenging task considering the complex bio- and lithostratigraphic subdivisions of Messinian rock units. Subaerial exposure of the pre-MSC (Qawasim deltaic sandstone), during drawdown of the Mediterranean Sea at the time of the MSC, triggered pervasive dissolution of unstable rock fragments, kaolinization of feldspar, and meteoric dolomitization of carbonate. This was followed by mesogenetic calcite cementation and kaolinite transformation into dickite in deeply buried Qawasim sandstone. Comparatively, the Abu Madi estuarine facies, deposited during transgression after drawdown related to the MSC, is characterized by eogenetic iron (Fe)-calcite, glauconite, and pyrite (averages of 14.5%, 6%, and 2%, respectively). This facies transition is marked by abundance of mature glauconite (with potassium oxide (K2O) at about 8%) whose content abates upward from the transgression surface. Moreover, the compositional variability of the Abu Madi sandstone gave rise to multiple diagenetic trajectories that resulted in chlorite formation presumably following smectite and kaolinite. Listed diagenetic variations in the studied Messinian sandstone resulted from a complex interplay between rocks’ compositional, depositional, and burial attributes, ultimately serving as a basis for high-resolution stratigraphic correlation in continental and marginal marine settings with poor biostratigraphic controls. |
| |
| Keywords: | Messinian Nile Delta Diagenesis Deltaic sedimentation Fluvial-estuarine Stratigraphic correlation |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
