Article
Environmental Sciences
Yusen Dong, Hsing-Chung Chang, Jiangtao Liu
Summary: The Badain Jaran Desert and surrounding deserts are the main sources of sand and dust storms in Asia. This study evaluated the displacement of sand dunes using the discrete Fourier transform method and estimated the sand fluxes between deserts.
Article
Green & Sustainable Science & Technology
Abdulkader El-Mir, Hilal El-Hassan, Amr El-Dieb, Abdelrahman Alsallamin
Summary: This study assesses the effect of mix design parameters on the properties and cost of geopolymer mortar, and uses Taguchi method in experimental design. The results show that up to 25% DDF replacement enhances the density, strength, and durability of the geopolymers. Other factors have limited contributions. The TOPSIS method determines the optimal mix proportions.
Article
Environmental Sciences
Sultan A. S. Araffa, Maha Abdelazeem, Hassan S. Sabet, Ahmed M. Al Dabour
Summary: The El Moghra area in the western desert of Egypt is part of a national reclamation project that relies on the local El Moghra Formation as its main aquifer. The region has good soil suitable for agricultural development. The subsurface stratigraphy consists of six geo-electrical units, with the main aquifer represented by the fourth and sixth units intercalated with a clay unit.
ENVIRONMENTAL EARTH SCIENCES
(2021)
Article
Geography, Physical
Zhu Bingqi
Summary: The study comprehensively analyzed the dynamic changes, material sources, dust activity history, and influencing factors of sand dunes in the Hexi Corridor. The results showed that climate is the primary influencing factor of dune landform changes and the source materials of sand dunes mainly come from alluvial/proluvial and palaeo-fluvial sediments. The movement direction of sand dunes is controlled by the regional-scale wind system. The warming and humidification of the Hexi climate is a synchronous response to global warming and the strengthening of the Asian Summer Monsoon, and it is also the main reason for the reduction of dust storms in the study area, while desertification in oasis areas is caused by groundwater fluctuation affected by human activities.
JOURNAL OF GEOGRAPHICAL SCIENCES
(2022)
Article
Multidisciplinary Sciences
Noha Imam
Summary: Data on the recent migratory history and geochemical circumstances of radionuclides can be obtained from the disequilibrium of the uranium series, mainly caused by groundwater flow and host rock. The Siwa Oasis groundwater, which serves as a vital water source, was dated by measuring uranium levels. Disequilibrium behavior in water samples indicated high concentrations of U-234 and Th-230. The observation of Th-230/Th-232 activity ratios suggested the presence of pure carbonate minerals in the aquifer.
SCIENTIFIC REPORTS
(2023)
Article
Engineering, Environmental
Ahmad K. Abd El Aal, Mohamed K. Salah, Nevin Aly
Summary: The study evaluates tufa rocks exposed at Kurkur Oasis, finding that they are primarily composed of calcite and exhibit heterogeneous petrophysical and elastic properties, with major geomechanical differences limiting their use as building stones.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2021)
Article
Environmental Sciences
Eslam Ali, Wenbin Xu, Xiaoli Ding
Summary: Understanding the relationship between climatic conditions and dune ecosystems requires large-scale monitoring of dune velocities in the Sand Sea North Sinai. By automatically matching image pairs from Landsat-8 and utilizing fusion methods, researchers were able to estimate the spatial and temporal variability of dune migration velocities with high spatial coverage and reliability. The study found that the magnitudes and directions of dune migration in the area are spatially and temporally variable, highlighting the importance of accurate velocity data for climate and ecosystem research.
Article
Geography, Physical
Johannes M. Miocic, Ritu Sah, Sakonvan Chawchai, Peerasit Surakiatchai, Montri Choowong, Frank Preusser
Summary: The study investigates the depositional history of a transverse coastal dune in the Bang Berd dune field, Western Gulf of Thailand, using high-resolution luminescence chronology and sedimentological analyses. The dune deposition started at least around 3000 years ago, coinciding with a regional sea level drop, and predominantly occurred in relation to the northeasterly winter monsoon. This study highlights the importance of the Bang Berd dune system as natural protection against coastal inundation.
Article
Geology
Zaki A. Abdel-Fattah
Summary: This paper focuses on the fluvial architecture and depositional facies model of the Late Cretaceous large sandy braided-river system of the Nubia Formation in the central Eastern Desert of Egypt. It identifies two distinctive fluvial architectural styles in the lower and upper members, highlighting different characteristics and depositional environments. The fluvial depositional system and sequences are strongly controlled by Late Cretaceous base-level fluctuations and tectonic pulses of the Laramide Orogeny.
SEDIMENTARY GEOLOGY
(2021)
Article
Geology
Belal S. Salem, Patrick M. O'Connor, Eric Gorscak, Sanaa El-Sayed, Joseph J. W. Sertich, Erik Seiffert, Hesham M. Sallam
Summary: The discovery of Upper Cretaceous dinosaur fossils in the Western Desert of central Egypt adds to the limited record of dinosaurs in the region. The fossils include various types of dinosaurs, such as titanosaurian sauropods and non-avian theropods, indicating a diverse ecosystem supporting non-avian dinosaurs in Late Cretaceous North Africa.
CRETACEOUS RESEARCH
(2021)
Article
Environmental Sciences
Eman Ghoneim, Colleen Healey, Mohamed Hemida, Ali Shebl, Amr Fahil
Summary: Environmental degradation is reducing crop productivity in Egypt, but renewable energy sources such as geothermal energy and desalination of saline water could provide sustainable fresh water and electricity. The Siwa Oasis in Egypt has high geothermal potential and can be used for power production and industrial processes. Combining temperature measurements, satellite remote sensing, and geospatial analysis can enhance geothermal prospecting in this region.
Article
Geosciences, Multidisciplinary
Sahar Hassan, Sameh S. Tahoun, Mohamed Darwish, William Bosworth, Ahmed E. Radwan
Summary: An integrated approach combining borehole image logs, palynology, and conventional wireline logs, as well as global chronostratigraphic charts, has been used to study the chrono-lithological boundary between the Kharita and Bahariya formations and the Albian and Cenomanian Stages in the Abu Gharadig Basin. The interpreted reservoir intervals suggest that the hydrocarbons trapped in the Albian-Cenomanian reservoirs are composed of type II/III kerogen. The study provides comprehensive information about the Albian-Cenomanian succession in the Northern Western Desert.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Geochemistry & Geophysics
Mohamed A. Khalil, Mostafa G. Temraz, R. M. Joeckel, Osama M. Elnaggar, Hesham H. Abuseda
Summary: This study presents a method for estimating the hydraulic conductivity of rock strata in the Qarun oil field and shows that resistivity logs can be used to assess the flow properties of a reservoir.
PURE AND APPLIED GEOPHYSICS
(2022)
Article
Engineering, Multidisciplinary
A. Saad, Th. Abdel Fattah, H. Holial, A. I. Diab, S. Abou Shagar
Summary: The study focuses on understanding the structural elements controlling the hydrocarbon potential and productivity of upper Cretaceous reservoirs in the Eastern flank of the Abu Gharadig Basin in the Western Desert of Egypt. Major sandstone reservoirs in this area, particularly Abu Roash G Member and Upper Bahariya Formation, exhibit lateral facies changes and significant structure uncertainty with high hydrocarbon potential. The aim of the study is to identify the regional lateral distribution of these reservoirs in specific fields within the area through integrated geological and geophysical studies for future exploration activities.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Construction & Building Technology
Elhadj Guesmia Daheur, Zhong-Sen Li, Abdellah Demdoum, Said Taibi, Idriss Goual
Summary: The goal of this experimental research is to determine the suitability of Saharan soils (dune sand and tuff) for pavement construction in arid areas. After discovering the optimal geotechnical characteristics of a tuff and dune sand mixture (referred to as TDSopt) for low-traffic pavements, it was found that the rise of groundwater level and aggressive sulphate caused a decrease in mechanical properties. To address this issue, treatment with sulphate-resistant binders was proposed and laboratory testing was conducted. The results validated the effectiveness of the treatment, improving various properties of the TDSopt mixture.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Geology
E. A. Abou El-Anwar, H. S. Mekky, H. H. Darweesh, S. K. Aita
CARBONATES AND EVAPORITES
(2018)
Article
Geology
Esmat A. Abou El-Anwar, H. S. Mekky, W. Abdel Wahab
CARBONATES AND EVAPORITES
(2019)
Article
Geology
Esmat Ahmed Abou El-Anwar
CARBONATES AND EVAPORITES
(2019)
Article
Geology
Esmat A. Abou El-Anwar
CARBONATES AND EVAPORITES
(2019)
Article
Geology
Esmat A. Abou El-Anwar, Hamed S. Mekky, Said H. Abd El Rahim
CARBONATES AND EVAPORITES
(2020)
Article
Geosciences, Multidisciplinary
Esmat Abou El-Anwar, Salman Salman, Ahmed Asmoay, Ahmed Elnazer
Summary: The study revealed that River Nile sediments are mainly composed of Quartz, with SiO2 as the major chemical component. The geochemical interrelation indicated different sources of harmful elements. Pollution indices showed the degree of sediment contamination, highlighting the importance of regular monitoring to protect the Nile River environment.
JOURNAL OF AFRICAN EARTH SCIENCES
(2021)
Article
Geology
Esmat A. Abou El-Anwar, Said H. Abd El Rahim
Summary: The X-ray diffraction results of the study mine reveal two main phases, phosphatic and non-phosphatic, with apatite being the dominant component of the phosphatic phase. Microscopic examination shows that the phosphatic rocks consist of phosphatic lithoclasts, phosphatic bioclasts, opaques, and embedded quartz in a microcrystalline phosphatic matrix. These rocks were deposited under varying redox conditions and are considered potential sources of trace and rare earth elements. The enrichment of heavy metals in the study mine suggests post-depositional conditions and intensive chemical weathering. The phosphatic rocks are suitable for industrialized fertilizers according to international guidelines.
CARBONATES AND EVAPORITES
(2022)
Article
Chemistry, Applied
Hanan F. Youssef, Rabab A. Nasr, Esmat A. Abou El-Anwar, Hamed S. Mekky, Said H. Abd El Rahim
Summary: The study shows that the formation of synthetic zeolite mixture containing Analcime, Wairakite, and Phillipsite is influenced by parameters such as alkalinity, solution chemistry, parent rock dissolution rate, and reaction duration. Low alkalinity favors the formation of Analcime, while high alkalinity is more suitable for dominance of Phillipsite. The surface area significantly increases after zeolitization, showing good adsorption performance for methylene blue dye.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Geochemistry & Geophysics
Esmat Abou El-Anwar, Salman Salman, Doaa Mousa, Sami Aita, Walid Makled, Thomas Gentzis
Summary: The study evaluated the properties of organic-rich black shale in the El Sebaiya area in Egypt, finding it to be composed of quartz, calcite, kaolinite, and montmorillonite. The shale was deposited under marine conditions and has a range of organic richness and hydrocarbon potential. Organic petrography suggests that the kerogen is mixed types II/III and III and is immature to marginally mature, with the potential for oil and gas generation at higher maturity levels.
Article
Chemistry, Multidisciplinary
Salman A. Salman, Esmat A. Abou El-Anwar, Ahmed S. Asmoay, Hamed S. Mekky, Wael Abdel Wahab, Ahmed A. Elnazer
Summary: The study investigates the behavior of toxic elements in Egyptian soil, focusing on the mobility of As, Pb, Cr, Ni, Cu, and Co due to anthropogenic activities. The results indicate a risk of pollution in the studied soils, with varying levels of risk for different metals. Geogenic, mixed, and anthropogenic sources of the metals were identified, with urbanization, traffic, and industry playing a role in the release of toxic metals into the environment.
EGYPTIAN JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Esmat A. Abou El-Anwar, Salman A. Salman, Doaa Mousa, Sami K. Aita
EGYPTIAN JOURNAL OF CHEMISTRY
(2020)
Article
Chemistry, Multidisciplinary
Esmat A. Abou El-Anwar, Hamed S. Mekky, Wael Abdel Wahab
EGYPTIAN JOURNAL OF CHEMISTRY
(2019)
Article
Geology
Mohamed M. Gomaa, Esmat A. Abou El-Anwar
CARBONATES AND EVAPORITES
(2019)
Article
Chemistry, Multidisciplinary
Hs Mekky, E. A. Abou El-Anwar, S. A. Salman, A. A. Elnazer, W. Abdel Wahab, A. S. Asmoay
EGYPTIAN JOURNAL OF CHEMISTRY
(2019)
Article
Geology
Esmat A. Abou El-Anwar, S. H. Abd El Rahim, H. S. Mekky
CARBONATES AND EVAPORITES
(2019)