Hatem Aboelkhair - Profile on Academia.edu (original) (raw)

Papers by Hatem Aboelkhair

Research paper thumbnail of A proposed new Precambrian skarn deposits in the Arabian shield

The volcanosedimentary arc-related skarn deposits are the predominant types in the Arabian Shield... more The volcanosedimentary arc-related skarn deposits are the predominant types in the Arabian Shield (AS). However, the post-amalgamation extraordinary marine basins with carbonate successions exist in the AS, intruded by different types of granite plutons, and dissected by major shear zones. Therefore, all the recipes for skarn deposits are mature at the contact between the carbonate succession in the marine molasse basins and granite plutons. Magnetic data and ASTER data were integrated with the geochemical database to locate the preliminary areas for further exploration in the Murdama basin. The Murdama basin (72,000 km2), which is the locality for the Murdama limestone, has a higher magnetic anomaly at the contact with post-Murdama granite batholiths, but the magnetic anomaly becomes significant at the contact with the Idah granitic suite. The shallow-seated structural magnetic lineaments within the Murdama basin and at the eastern boundary of the basin are controlled by the Najd f...

Research paper thumbnail of The potential use of remote sensing and GIS techniques for sustainable development in the coastal plain between Halayb and Shalateen, Egypt

The potential use of remote sensing and GIS techniques for sustainable development in the coastal plain between Halayb and Shalateen, Egypt

Arabian Journal of Geosciences, 2021

The Red Sea coastal plain between Halayb and Shalateen represents one of the localities with grea... more The Red Sea coastal plain between Halayb and Shalateen represents one of the localities with great potential for future sustainable development. The area is almost flat with Quaternary deposits from the western wadies towards the Red Sea shoreline. Due to the general character of the area, it is promising for reclamation, tourism, and industrial activities. This paper highlights the environmental characteristics of the area for sustainable development using remote sensing and GIS techniques. Geomorphological analysis, assessment of soil pollution (radiological and heavy metal distribution), groundwater assessment, and detection of change to the shoreline have been carried out. Geomorphologically, the most suitable part of the study area for future planning is the southeastern region. The northern area is not appropriate as it is classified as third-order drainage and will be exposed to flash floods that threaten the infrastructure of the native settlements, newly built tourist villa...

Research paper thumbnail of Evaluation of salts in salt pans, Siwa Oasis, Egypt

Evaluation of salts in salt pans, Siwa Oasis, Egypt

Arabian Journal of Geosciences

Siwa Oasis is a tectonically induced depression located in the northern part of the Western Deser... more Siwa Oasis is a tectonically induced depression located in the northern part of the Western Desert. It is intensively characterized by salt mineralization and salt pans. This paper aims to investigate the evaluation of salts from the near-surface underground water in Siwa Oasis to assess the quality of salt for several uses. The study results show that the precipitated minerals identified by XRD are halite, sylvite, gypsum, carnallite, magnesium sulfate hydrate, sodium chlorate, and bischofite. More than 90% of NaCl present in the solution precipitate alone in the first stages. Analysis of heavy metals and trace elements indicated that all the salt samples were found at very low concentrations below the allowable limits. The study indicates that the type of Siwa salt is a very good quality salt, which needs a very simple refining process to meet and exceed the international standards of edible (food) salt.

Research paper thumbnail of Contribution of ASTER-TIR indices with geophysical and geospatial data for groundwater prospecting in El-Qaa plain area, Southern Sinai, Egypt

Contribution of ASTER-TIR indices with geophysical and geospatial data for groundwater prospecting in El-Qaa plain area, Southern Sinai, Egypt

Arabian Journal of Geosciences, 2020

El-Qaa plain in the South Sinai is one of Egypt’s promising regions for sustainable development. ... more El-Qaa plain in the South Sinai is one of Egypt’s promising regions for sustainable development. The groundwater forms the primary sources of development in this region. The present study aims to identify the groundwater resources in El-Qaa plain area, Southern Sinai, Egypt. ASTER-TIR indices (Carbonate Index, Quartz Index, and Mafic Index) combined for the first ones with geophysical and geospatial data using fuzzy overlay spatial model (FOSM) to define the potential zones of groundwater in the area of study. The resultant model was tested and validated using the available well data of groundwater in the area of study. The results revealed that over 65% of EL-Qaa area is high to moderate with groundwater potentiality. The favorable areas for groundwater storing are nearly situated in the areas of high infiltration (high pixel values of carbonate and quartz indices) in the northwestern part of EL-Qaa area. Also, the regions in the central western, mid, and northeastern portions of t...

Research paper thumbnail of Integration of airborne geophysical and ASTER remotely sensed data for delineation and mapping the potential mineralization zones in Hamash area, South Eastern Desert, Egypt

Integration of airborne geophysical and ASTER remotely sensed data for delineation and mapping the potential mineralization zones in Hamash area, South Eastern Desert, Egypt

The advancement of geophysical methods and remote-sensing techniques, with improved processing mo... more The advancement of geophysical methods and remote-sensing techniques, with improved processing models in recent years, encourage for further applied research in gold exploration and other associated elements and becoming useful tools for the exploration of new occurrences. The main objective of this research paper is to explore and map the hydrothermal alteration zones associated with gold mineralization in the Hamash area based on airborne geophysical (aeromagnetic and airborne gamma-ray spectrometry) and ASTER remote sensing data. For this purpose, ASTER and geophysical data are processed by different techniques including band ratios, minimum noise fraction, Crosta techniques, constrained energy minimization and F-parameter maps which allow for discriminating different rock units and delineating hydrothermal alteration zones. Furthermore, structural lineaments of surface and shallow-seated are effectively extracted and auto-mapped using ASTER and magnetic data. The potential miner...

Research paper thumbnail of Using Airborne Gamma-Ray Spectrometry for Mapping Radioactive Zones in G. Kadabora Area, Central Eastern Desert, Egypt

International Journal of Mining Science, 2020

This research aims at mapping potential radioactive zones in G. kadabora area, Central Eastern De... more This research aims at mapping potential radioactive zones in G. kadabora area, Central Eastern Desert, Egypt using airborne gamma-ray spectrometry data. Various processing techniques were applied to delineate potential radioactive zones in the studied area including; False Color Composite (FCC), Principal Component Analysis (PCA) and K-Means classification which represents their robustness in extracting known and potential anomalous areas. The results revealed that the highest radioactivity in the G. Kadabora area, Central Eastern Desert is associated with the central. G. Kadabora pluton which can be subdivided into three parts where the northern part of the pluton is the most promising part. The detailed investigation concluded that radioactivity in the current study area is controlled lithologically and structurally where Pegmatite, Syanogranite and Monzogranite represent the lithological control while N-S structural trend represents the structural control.

Research paper thumbnail of New Insights into the Tectonic Windows of the Eastern Desert of Egypt: An Integrated Field and Remote Sensing Approach

New Insights into the Tectonic Windows of the Eastern Desert of Egypt: An Integrated Field and Remote Sensing Approach

This work is an integrated field and ASTER remote sensing approach for remapping and interpreting... more This work is an integrated field and ASTER remote sensing approach for remapping and interpreting tectonic windows of the Eastern Desert of Egypt. These tectonic windows include the Hafafit, Sibai, Shalul, Meatiq and Beitan gneissic domes. The L1B data of the five areas are used, taking into consideration to avoid ASTER scenes after April, 2008 at which ASTER SWIR data show saturation of values and severe striping. False color composites (FCC) of the non-correlated bands 7, 3, 1 in RGB of the studied areas revealed a good match with field relations and observations. The relative good spatial and spectral resolution of ASTER imagery played an important role in distinguishing subtle spectral differences between the rock units outcropping in the studied areas. Field relations and observations collected from, at least three, cross-strike traverses in each dome, together with results obtained from microstructural investigations of the oriented samples and ASTER image processing led to ac...

Research paper thumbnail of Microstructural Study and Strain Analysis of Deformed Neoproterozoic Lithologies in the Um Junud Area, Northern Nubian Shield

Microstructural Study and Strain Analysis of Deformed Neoproterozoic Lithologies in the Um Junud Area, Northern Nubian Shield

Geotectonics

Estimation of finite strain and microstructural analysis of deformed rocks are keys to better und... more Estimation of finite strain and microstructural analysis of deformed rocks are keys to better understanding deformational processes and related structures in a variety of scales started from microscopic fabric development to regional-scale structures. In the present work, we carried out the quantitative calculation of strain using the Rf/φ and Fry methods for quartz, feldspar and mafic grains (e.g. biotite and hornblende) from twenty two collected samples for granitic gneiss, amphibolite and hornblende schist samples from the Um Junud area situated in south Eastern Desert of Egypt. Forty four thin sections were prepared and measured by using finite strain methods. The strain data indicate high to moderate ranges of deformation of the amphibolite to granitic rocks. The axial ratios in the XZ section range from 1.74 to 4.37 and 1.50 to 4.46 for the Rf/φ and the Fry methods respectively. The finite strain direction for the long axes displays clustering along N to WNW trend, and shallow WNW plunging in the majority of the studied samples. The short axes are found to be subvertical associated with a subhorizontal foliation. It is concluded that finite strain is of the same order of magnitude for various lithologic units outcropping in the area, and that contacts were formed under semi-brittle to semi-ductile deformation conditions. Thus, the finite strain accumulated during superimposed deformation on a previously nappe structure assemblage, which pointed out that these contacts were created during the accumulation of finite strain. This result is inconsistent with the generally believed that nappe creation in orogens carried out by simple shear deformation.

Research paper thumbnail of Airborne gamma-ray spectrometric characteristics of lithological units and environmental issues in the Bahariya Oases area in the northern part of western desert, Egypt

Airborne gamma-ray spectrometric characteristics of lithological units and environmental issues in the Bahariya Oases area in the northern part of western desert, Egypt

Research paper thumbnail of Shoreline Changes in Front of New Mansoura City

Scientific Journal for Damietta Faculty of Science

The shoreline changes of the coastal zone at New Mansoura City which extends about 27km, have bee... more The shoreline changes of the coastal zone at New Mansoura City which extends about 27km, have been studied using GIS technique based on RS data. The shoreline spatial and temporal changes in the interval time between years;1984 and 2018 has been estimated. The results show that the coast of New Mansoura City has been affected by morphological changes due to the shoreline accretion and erosion. The area has been subjected to increase in the accretion areas by nearly 2.34 km 2 , however, the erosional areas reach about 0.195 km 2 .The average rate of the shoreline accretion area was around 3.12 m/y, while the rate of the shoreline erosion area was-1.23m/y. Accordingly, the shoreline in the study area is mostly an accretion shoreline and the erosion areas are very limited and should be protected.

Research paper thumbnail of Evaluation of the Groundwater Quality of the Miocene Aquifer and its suitability for Domestic and Agriculture Purposes, West Nile Delta, Egypt

Scientific Journal for Damietta Faculty of Science

This study was conducted to evaluate factors regulating groundwater quality in an area with agric... more This study was conducted to evaluate factors regulating groundwater quality in an area with agriculture as main use. Thirty three groundwater samples have been collected from the area between El-Sadat and El-Khatatba city. The study area covers an area of approximately 634 km2. Rapid development in recent years has led to an increased demand for water, which is increasingly being fulfilled by groundwater abstraction. A detailed knowledge of the water quality can enhance understanding of the hydrochemical system, to achieve this; a hydrochemical investigation was carried out in the study area. Groundwater samples were chemically analyzed for major physicochemical parameters in order to understand the different geochemical processes affecting the groundwater quality. The analytical results show higher concentration of total dissolved solids (21%), chloride (24%), and total hardness (30%), calcium (9%) and sodium (36.4%) which indicates signs of deterioration as compared with limits of WHO (2011) standards. On the other hand, 3% groundwater sample is unsuitable for irrigation purposes according to Soluble Sodium Percent (SSP) and Kelley's Ratio (KR) represent 60% of samples are suitable based on irrigation quality parameters. The study revealed that application of fertilizer for agricultural contributing the higher concentration of ions in aquifer of Miocene.

Research paper thumbnail of Mapping lineament features using GIS approaches: case study of Neoproterozoic basement rocks in the South-Eastern Desert of Egypt

Mapping lineament features using GIS approaches: case study of Neoproterozoic basement rocks in the South-Eastern Desert of Egypt

Arabian Journal of Geosciences

In geosciences, field observations, and survey, remote sensing applications and data analysis sti... more In geosciences, field observations, and survey, remote sensing applications and data analysis still need to find out a seamless approach of integration, interlinking, and storing environment. Most applications of geomatic tools in geological studies (mainly in southern countries) focus on getting information of the real world from satellite data, but do not specify the concept of the way to represent them. However, heterogeneity exists in data form of different geological components (e.g., petrography and structure analysis), measurements, spatial analysis, and classification, which make the property and relation in the perspective of integration and management non-trivial aspect. However, this paper is an attempt to figure out a geo-data management approach by using the geo-information system (GIS). The case study is South Eastern Desert, Egypt, which built up of Neoproterozoic basement rocks and experienced successive deformations. We proposed to capture different geological data and processed digital images, together with conceptual model, to facilitate a geo-spatial framework and improve the exploration and detection of lithologies, lineaments features, and find out its interlink. Therefore, the lineament number percentage and the lineament length percentage could be used as significance of rock unit chronology, where the digital foot prints of Neoproterozoic basement rocks were created.

Research paper thumbnail of Mapping and assessing limestone as a raw material for the cement industry using satellite data: a case study of areas between Riyadh and Al Kharj, Saudi Arabia

Mapping and assessing limestone as a raw material for the cement industry using satellite data: a case study of areas between Riyadh and Al Kharj, Saudi Arabia

Arabian Journal of Geosciences

Research paper thumbnail of Reliability of using ASTER data in lithologic mapping and alteration mineral detection of the basement complex of West Berenice, Southeastern Desert, Egypt

Reliability of using ASTER data in lithologic mapping and alteration mineral detection of the basement complex of West Berenice, Southeastern Desert, Egypt

Arabian Journal of Geosciences

Research paper thumbnail of Hydrogeophysical study at an arid area: case study at Ayun Musa hot springs, Sinai, Egypt

NRIAG Journal of Astronomy and Geophysics

A geoelectrical resistivity survey supported by hydrochemical analysis was managed in Ayun Musa a... more A geoelectrical resistivity survey supported by hydrochemical analysis was managed in Ayun Musa area to detect the groundwater aquifer, differentiate the subsurface layers and estimate the groundwater quality of Ayun Musa springs. A suit of 29 vertical electrical soundings (VES) of AB/2 varying from 1 up to 1000 metres were measured in the study area to achieve the goals. Water samples were collected from ten localities in the study area. Interpretation of the VESes using 1D and 2D algorithms indicates the presence of five geoelectric units of different resistivities. The main water bearing formation related to the Lower Cretaceous represented by the fifth layer and located at depth range from 205 to 256 m below the surface. On the other hand, Interpretation of hydrochemical analysis reveals that the groundwater in Ayun Musa area is brackish in nature. The sequence of the abundance of the major ions is in the following order Na + > Mg +2 > Ca +2 and Cl − > SO 4 −2 > HCO 3 −. This suggests active dissolution and ion exchange processes and the high chloride and sodium concentrations indicate a major influence by seawater. Generally, the groundwater samples in the study area are not suitable for domestic purposes.

Research paper thumbnail of Integration of Gamma-Ray Spectrometric and Aster Data for Uranium Exploration in Qash Amer-El-Sela Area, Southeastern Desert, Egypt

Nuclear Sciences Scientific Journal

The present work used the integrated remote-sensing and ground gamma-ray spectrometric data to pr... more The present work used the integrated remote-sensing and ground gamma-ray spectrometric data to prospect of radioactive zones at Gabal Qash Amer-El-Sela area, Southeastern Desert of Egypt. Geological interpretation of ASTER image correlated with field studies revealed that the study area is mainly covered by intermediate metavolocanics, granodiorites, two-mica granites, biotite granites and muscovite granites. These rocks were injected by pegmatitic and quartz veins and cutting by acidic and basic dykes. The applied ASTER data enabled to identify uraniferous alteration zones hosted in the granitic rocks through the use of band ratios b4/b6 and b5/b4 for clay and ferrous silicate alteration. The band ratio combinations of b12/b13: b11/b12: b14/b13 as R:G:B and b4/b6:b2/b1:b4/b3 as R:G:B were very useful for discriminate the granites from the metavolcanics and mapping different phases of the granite in the study area. Ground gamma-ray spectrometric survey data were applied to check the surface distribution of radioactivity, which may ascertain its compatibility with surface structures, and delineate the suitable locations for probable valuable mineralization. The study revealed the existence of uranium mineralization in alteration zones associated with granites, along ENE-WSW trending shear zones as well as other isolated alteration zones. Three uranium-bearing alteration zones hosted in granities were detected. These zones are characterized by ferrugination, silicification, grizenization and kaolinitization. The most promising alteration zones occur at the northeastern part of El-Selashear zone. Another promising uranium anomaly is located to the west of the main shear zone, as well as third anomaly, located at the southeastern part of Gabal Qash Amer. These zones and individual anomalies are characterized by very high radioactive anomalies (up to 3700 ppm eU). Other mineralized sites were detected in the south central part of Gabal El-Selaas well as in the eastern part of the study area. The final result of this study confirms that El-Sela granite can be considered as one of the most promising granite outcrops in Egypt, regarding its U-fertility.

Research paper thumbnail of Using Remotely Sensed Multispectral Aster Data for Mapping Extensive Basalt Flow Around Al Madinah Area, Saudi Arabia

Processing of multispectral ASTER data were used for detection and mapping Tertiary-Quaternary ba... more Processing of multispectral ASTER data were used for detection and mapping Tertiary-Quaternary basalt flow around Madinah area, Saudi Arabia which forms part of the north-south alignment of basalt plateaux in the Western part of Arbian Sheild. To identify and map this type of volcanic rocks, Mafic Index (MI), as well as band combinations and band ratio combination were used in the study area. Mafic Index (MI) was high for mafic and ultrmafic rocks, and systematically lower as the rock type change to felsic. False color images of ASTER band combination of 7:3:1 in R:G:B distinguished obviously between different rock units in the study area. On the other hand ASTER band combination of 1:4:8 in R:G:B clearly separate volcanic cone and crater as blue color. A new band ratio combination 6/8:4/8:12/13 successfully mapped basalt flow in the study area as blue color. Decorrelation stretching of TIR band combination 10:12:13 for R:G:B clearly mapped the basalt flow bodies as greenish yellow ...

Research paper thumbnail of Detecting albite granite in the Central Eastern Desert of Egypt using ASTER multi-band thermal infrared

Detecting albite granite in the Central Eastern Desert of Egypt using ASTER multi-band thermal infrared

Research paper thumbnail of Arabian Journal of Geosciences

Arabian Journal of Geosciences

Arabian Journal of Geosciences

Research paper thumbnail of Processing of Multispectral ASTER Data for Mapping Alteration Minerals Zones: As an Aid for Uranium Exploration in Elmissikat-Eleridiya Granites, Central Eastern Desert, Egypt

The Open Geology Journal, 2014

Elmissikat-Eleridiya district is one of the most important uranium localities in the central East... more Elmissikat-Eleridiya district is one of the most important uranium localities in the central Eastern Desert of Egypt. The feature oriented principal component selection (FPCS) and spectral angle mapper (SAM) techniques were applied on ASTER L1B imagery for mapping the common alteration zones. The study revealed that ASTER VNIR-SWIR bands are effectively used for delineating sericite, kaolinite, chlorite, illite and hematite bearing alteration zones, whereas ASTER TIR bands are most effective in delineation of silica-rich zones, which associate and could be used as pathfinder for radioactive mineralization within the study area. The resultant alteration maps show good coincidence with the explored uranium sites and suggest further similar unexplored sites. The results could assist the development of uranium exploration in the study area and other similar localities within the Egyptian deserts.

Research paper thumbnail of A proposed new Precambrian skarn deposits in the Arabian shield

The volcanosedimentary arc-related skarn deposits are the predominant types in the Arabian Shield... more The volcanosedimentary arc-related skarn deposits are the predominant types in the Arabian Shield (AS). However, the post-amalgamation extraordinary marine basins with carbonate successions exist in the AS, intruded by different types of granite plutons, and dissected by major shear zones. Therefore, all the recipes for skarn deposits are mature at the contact between the carbonate succession in the marine molasse basins and granite plutons. Magnetic data and ASTER data were integrated with the geochemical database to locate the preliminary areas for further exploration in the Murdama basin. The Murdama basin (72,000 km2), which is the locality for the Murdama limestone, has a higher magnetic anomaly at the contact with post-Murdama granite batholiths, but the magnetic anomaly becomes significant at the contact with the Idah granitic suite. The shallow-seated structural magnetic lineaments within the Murdama basin and at the eastern boundary of the basin are controlled by the Najd f...

Research paper thumbnail of The potential use of remote sensing and GIS techniques for sustainable development in the coastal plain between Halayb and Shalateen, Egypt

The potential use of remote sensing and GIS techniques for sustainable development in the coastal plain between Halayb and Shalateen, Egypt

Arabian Journal of Geosciences, 2021

The Red Sea coastal plain between Halayb and Shalateen represents one of the localities with grea... more The Red Sea coastal plain between Halayb and Shalateen represents one of the localities with great potential for future sustainable development. The area is almost flat with Quaternary deposits from the western wadies towards the Red Sea shoreline. Due to the general character of the area, it is promising for reclamation, tourism, and industrial activities. This paper highlights the environmental characteristics of the area for sustainable development using remote sensing and GIS techniques. Geomorphological analysis, assessment of soil pollution (radiological and heavy metal distribution), groundwater assessment, and detection of change to the shoreline have been carried out. Geomorphologically, the most suitable part of the study area for future planning is the southeastern region. The northern area is not appropriate as it is classified as third-order drainage and will be exposed to flash floods that threaten the infrastructure of the native settlements, newly built tourist villa...

Research paper thumbnail of Evaluation of salts in salt pans, Siwa Oasis, Egypt

Evaluation of salts in salt pans, Siwa Oasis, Egypt

Arabian Journal of Geosciences

Siwa Oasis is a tectonically induced depression located in the northern part of the Western Deser... more Siwa Oasis is a tectonically induced depression located in the northern part of the Western Desert. It is intensively characterized by salt mineralization and salt pans. This paper aims to investigate the evaluation of salts from the near-surface underground water in Siwa Oasis to assess the quality of salt for several uses. The study results show that the precipitated minerals identified by XRD are halite, sylvite, gypsum, carnallite, magnesium sulfate hydrate, sodium chlorate, and bischofite. More than 90% of NaCl present in the solution precipitate alone in the first stages. Analysis of heavy metals and trace elements indicated that all the salt samples were found at very low concentrations below the allowable limits. The study indicates that the type of Siwa salt is a very good quality salt, which needs a very simple refining process to meet and exceed the international standards of edible (food) salt.

Research paper thumbnail of Contribution of ASTER-TIR indices with geophysical and geospatial data for groundwater prospecting in El-Qaa plain area, Southern Sinai, Egypt

Contribution of ASTER-TIR indices with geophysical and geospatial data for groundwater prospecting in El-Qaa plain area, Southern Sinai, Egypt

Arabian Journal of Geosciences, 2020

El-Qaa plain in the South Sinai is one of Egypt’s promising regions for sustainable development. ... more El-Qaa plain in the South Sinai is one of Egypt’s promising regions for sustainable development. The groundwater forms the primary sources of development in this region. The present study aims to identify the groundwater resources in El-Qaa plain area, Southern Sinai, Egypt. ASTER-TIR indices (Carbonate Index, Quartz Index, and Mafic Index) combined for the first ones with geophysical and geospatial data using fuzzy overlay spatial model (FOSM) to define the potential zones of groundwater in the area of study. The resultant model was tested and validated using the available well data of groundwater in the area of study. The results revealed that over 65% of EL-Qaa area is high to moderate with groundwater potentiality. The favorable areas for groundwater storing are nearly situated in the areas of high infiltration (high pixel values of carbonate and quartz indices) in the northwestern part of EL-Qaa area. Also, the regions in the central western, mid, and northeastern portions of t...

Research paper thumbnail of Integration of airborne geophysical and ASTER remotely sensed data for delineation and mapping the potential mineralization zones in Hamash area, South Eastern Desert, Egypt

Integration of airborne geophysical and ASTER remotely sensed data for delineation and mapping the potential mineralization zones in Hamash area, South Eastern Desert, Egypt

The advancement of geophysical methods and remote-sensing techniques, with improved processing mo... more The advancement of geophysical methods and remote-sensing techniques, with improved processing models in recent years, encourage for further applied research in gold exploration and other associated elements and becoming useful tools for the exploration of new occurrences. The main objective of this research paper is to explore and map the hydrothermal alteration zones associated with gold mineralization in the Hamash area based on airborne geophysical (aeromagnetic and airborne gamma-ray spectrometry) and ASTER remote sensing data. For this purpose, ASTER and geophysical data are processed by different techniques including band ratios, minimum noise fraction, Crosta techniques, constrained energy minimization and F-parameter maps which allow for discriminating different rock units and delineating hydrothermal alteration zones. Furthermore, structural lineaments of surface and shallow-seated are effectively extracted and auto-mapped using ASTER and magnetic data. The potential miner...

Research paper thumbnail of Using Airborne Gamma-Ray Spectrometry for Mapping Radioactive Zones in G. Kadabora Area, Central Eastern Desert, Egypt

International Journal of Mining Science, 2020

This research aims at mapping potential radioactive zones in G. kadabora area, Central Eastern De... more This research aims at mapping potential radioactive zones in G. kadabora area, Central Eastern Desert, Egypt using airborne gamma-ray spectrometry data. Various processing techniques were applied to delineate potential radioactive zones in the studied area including; False Color Composite (FCC), Principal Component Analysis (PCA) and K-Means classification which represents their robustness in extracting known and potential anomalous areas. The results revealed that the highest radioactivity in the G. Kadabora area, Central Eastern Desert is associated with the central. G. Kadabora pluton which can be subdivided into three parts where the northern part of the pluton is the most promising part. The detailed investigation concluded that radioactivity in the current study area is controlled lithologically and structurally where Pegmatite, Syanogranite and Monzogranite represent the lithological control while N-S structural trend represents the structural control.

Research paper thumbnail of New Insights into the Tectonic Windows of the Eastern Desert of Egypt: An Integrated Field and Remote Sensing Approach

New Insights into the Tectonic Windows of the Eastern Desert of Egypt: An Integrated Field and Remote Sensing Approach

This work is an integrated field and ASTER remote sensing approach for remapping and interpreting... more This work is an integrated field and ASTER remote sensing approach for remapping and interpreting tectonic windows of the Eastern Desert of Egypt. These tectonic windows include the Hafafit, Sibai, Shalul, Meatiq and Beitan gneissic domes. The L1B data of the five areas are used, taking into consideration to avoid ASTER scenes after April, 2008 at which ASTER SWIR data show saturation of values and severe striping. False color composites (FCC) of the non-correlated bands 7, 3, 1 in RGB of the studied areas revealed a good match with field relations and observations. The relative good spatial and spectral resolution of ASTER imagery played an important role in distinguishing subtle spectral differences between the rock units outcropping in the studied areas. Field relations and observations collected from, at least three, cross-strike traverses in each dome, together with results obtained from microstructural investigations of the oriented samples and ASTER image processing led to ac...

Research paper thumbnail of Microstructural Study and Strain Analysis of Deformed Neoproterozoic Lithologies in the Um Junud Area, Northern Nubian Shield

Microstructural Study and Strain Analysis of Deformed Neoproterozoic Lithologies in the Um Junud Area, Northern Nubian Shield

Geotectonics

Estimation of finite strain and microstructural analysis of deformed rocks are keys to better und... more Estimation of finite strain and microstructural analysis of deformed rocks are keys to better understanding deformational processes and related structures in a variety of scales started from microscopic fabric development to regional-scale structures. In the present work, we carried out the quantitative calculation of strain using the Rf/φ and Fry methods for quartz, feldspar and mafic grains (e.g. biotite and hornblende) from twenty two collected samples for granitic gneiss, amphibolite and hornblende schist samples from the Um Junud area situated in south Eastern Desert of Egypt. Forty four thin sections were prepared and measured by using finite strain methods. The strain data indicate high to moderate ranges of deformation of the amphibolite to granitic rocks. The axial ratios in the XZ section range from 1.74 to 4.37 and 1.50 to 4.46 for the Rf/φ and the Fry methods respectively. The finite strain direction for the long axes displays clustering along N to WNW trend, and shallow WNW plunging in the majority of the studied samples. The short axes are found to be subvertical associated with a subhorizontal foliation. It is concluded that finite strain is of the same order of magnitude for various lithologic units outcropping in the area, and that contacts were formed under semi-brittle to semi-ductile deformation conditions. Thus, the finite strain accumulated during superimposed deformation on a previously nappe structure assemblage, which pointed out that these contacts were created during the accumulation of finite strain. This result is inconsistent with the generally believed that nappe creation in orogens carried out by simple shear deformation.

Research paper thumbnail of Airborne gamma-ray spectrometric characteristics of lithological units and environmental issues in the Bahariya Oases area in the northern part of western desert, Egypt

Airborne gamma-ray spectrometric characteristics of lithological units and environmental issues in the Bahariya Oases area in the northern part of western desert, Egypt

Research paper thumbnail of Shoreline Changes in Front of New Mansoura City

Scientific Journal for Damietta Faculty of Science

The shoreline changes of the coastal zone at New Mansoura City which extends about 27km, have bee... more The shoreline changes of the coastal zone at New Mansoura City which extends about 27km, have been studied using GIS technique based on RS data. The shoreline spatial and temporal changes in the interval time between years;1984 and 2018 has been estimated. The results show that the coast of New Mansoura City has been affected by morphological changes due to the shoreline accretion and erosion. The area has been subjected to increase in the accretion areas by nearly 2.34 km 2 , however, the erosional areas reach about 0.195 km 2 .The average rate of the shoreline accretion area was around 3.12 m/y, while the rate of the shoreline erosion area was-1.23m/y. Accordingly, the shoreline in the study area is mostly an accretion shoreline and the erosion areas are very limited and should be protected.

Research paper thumbnail of Evaluation of the Groundwater Quality of the Miocene Aquifer and its suitability for Domestic and Agriculture Purposes, West Nile Delta, Egypt

Scientific Journal for Damietta Faculty of Science

This study was conducted to evaluate factors regulating groundwater quality in an area with agric... more This study was conducted to evaluate factors regulating groundwater quality in an area with agriculture as main use. Thirty three groundwater samples have been collected from the area between El-Sadat and El-Khatatba city. The study area covers an area of approximately 634 km2. Rapid development in recent years has led to an increased demand for water, which is increasingly being fulfilled by groundwater abstraction. A detailed knowledge of the water quality can enhance understanding of the hydrochemical system, to achieve this; a hydrochemical investigation was carried out in the study area. Groundwater samples were chemically analyzed for major physicochemical parameters in order to understand the different geochemical processes affecting the groundwater quality. The analytical results show higher concentration of total dissolved solids (21%), chloride (24%), and total hardness (30%), calcium (9%) and sodium (36.4%) which indicates signs of deterioration as compared with limits of WHO (2011) standards. On the other hand, 3% groundwater sample is unsuitable for irrigation purposes according to Soluble Sodium Percent (SSP) and Kelley's Ratio (KR) represent 60% of samples are suitable based on irrigation quality parameters. The study revealed that application of fertilizer for agricultural contributing the higher concentration of ions in aquifer of Miocene.

Research paper thumbnail of Mapping lineament features using GIS approaches: case study of Neoproterozoic basement rocks in the South-Eastern Desert of Egypt

Mapping lineament features using GIS approaches: case study of Neoproterozoic basement rocks in the South-Eastern Desert of Egypt

Arabian Journal of Geosciences

In geosciences, field observations, and survey, remote sensing applications and data analysis sti... more In geosciences, field observations, and survey, remote sensing applications and data analysis still need to find out a seamless approach of integration, interlinking, and storing environment. Most applications of geomatic tools in geological studies (mainly in southern countries) focus on getting information of the real world from satellite data, but do not specify the concept of the way to represent them. However, heterogeneity exists in data form of different geological components (e.g., petrography and structure analysis), measurements, spatial analysis, and classification, which make the property and relation in the perspective of integration and management non-trivial aspect. However, this paper is an attempt to figure out a geo-data management approach by using the geo-information system (GIS). The case study is South Eastern Desert, Egypt, which built up of Neoproterozoic basement rocks and experienced successive deformations. We proposed to capture different geological data and processed digital images, together with conceptual model, to facilitate a geo-spatial framework and improve the exploration and detection of lithologies, lineaments features, and find out its interlink. Therefore, the lineament number percentage and the lineament length percentage could be used as significance of rock unit chronology, where the digital foot prints of Neoproterozoic basement rocks were created.

Research paper thumbnail of Mapping and assessing limestone as a raw material for the cement industry using satellite data: a case study of areas between Riyadh and Al Kharj, Saudi Arabia

Mapping and assessing limestone as a raw material for the cement industry using satellite data: a case study of areas between Riyadh and Al Kharj, Saudi Arabia

Arabian Journal of Geosciences

Research paper thumbnail of Reliability of using ASTER data in lithologic mapping and alteration mineral detection of the basement complex of West Berenice, Southeastern Desert, Egypt

Reliability of using ASTER data in lithologic mapping and alteration mineral detection of the basement complex of West Berenice, Southeastern Desert, Egypt

Arabian Journal of Geosciences

Research paper thumbnail of Hydrogeophysical study at an arid area: case study at Ayun Musa hot springs, Sinai, Egypt

NRIAG Journal of Astronomy and Geophysics

A geoelectrical resistivity survey supported by hydrochemical analysis was managed in Ayun Musa a... more A geoelectrical resistivity survey supported by hydrochemical analysis was managed in Ayun Musa area to detect the groundwater aquifer, differentiate the subsurface layers and estimate the groundwater quality of Ayun Musa springs. A suit of 29 vertical electrical soundings (VES) of AB/2 varying from 1 up to 1000 metres were measured in the study area to achieve the goals. Water samples were collected from ten localities in the study area. Interpretation of the VESes using 1D and 2D algorithms indicates the presence of five geoelectric units of different resistivities. The main water bearing formation related to the Lower Cretaceous represented by the fifth layer and located at depth range from 205 to 256 m below the surface. On the other hand, Interpretation of hydrochemical analysis reveals that the groundwater in Ayun Musa area is brackish in nature. The sequence of the abundance of the major ions is in the following order Na + > Mg +2 > Ca +2 and Cl − > SO 4 −2 > HCO 3 −. This suggests active dissolution and ion exchange processes and the high chloride and sodium concentrations indicate a major influence by seawater. Generally, the groundwater samples in the study area are not suitable for domestic purposes.

Research paper thumbnail of Integration of Gamma-Ray Spectrometric and Aster Data for Uranium Exploration in Qash Amer-El-Sela Area, Southeastern Desert, Egypt

Nuclear Sciences Scientific Journal

The present work used the integrated remote-sensing and ground gamma-ray spectrometric data to pr... more The present work used the integrated remote-sensing and ground gamma-ray spectrometric data to prospect of radioactive zones at Gabal Qash Amer-El-Sela area, Southeastern Desert of Egypt. Geological interpretation of ASTER image correlated with field studies revealed that the study area is mainly covered by intermediate metavolocanics, granodiorites, two-mica granites, biotite granites and muscovite granites. These rocks were injected by pegmatitic and quartz veins and cutting by acidic and basic dykes. The applied ASTER data enabled to identify uraniferous alteration zones hosted in the granitic rocks through the use of band ratios b4/b6 and b5/b4 for clay and ferrous silicate alteration. The band ratio combinations of b12/b13: b11/b12: b14/b13 as R:G:B and b4/b6:b2/b1:b4/b3 as R:G:B were very useful for discriminate the granites from the metavolcanics and mapping different phases of the granite in the study area. Ground gamma-ray spectrometric survey data were applied to check the surface distribution of radioactivity, which may ascertain its compatibility with surface structures, and delineate the suitable locations for probable valuable mineralization. The study revealed the existence of uranium mineralization in alteration zones associated with granites, along ENE-WSW trending shear zones as well as other isolated alteration zones. Three uranium-bearing alteration zones hosted in granities were detected. These zones are characterized by ferrugination, silicification, grizenization and kaolinitization. The most promising alteration zones occur at the northeastern part of El-Selashear zone. Another promising uranium anomaly is located to the west of the main shear zone, as well as third anomaly, located at the southeastern part of Gabal Qash Amer. These zones and individual anomalies are characterized by very high radioactive anomalies (up to 3700 ppm eU). Other mineralized sites were detected in the south central part of Gabal El-Selaas well as in the eastern part of the study area. The final result of this study confirms that El-Sela granite can be considered as one of the most promising granite outcrops in Egypt, regarding its U-fertility.

Research paper thumbnail of Using Remotely Sensed Multispectral Aster Data for Mapping Extensive Basalt Flow Around Al Madinah Area, Saudi Arabia

Processing of multispectral ASTER data were used for detection and mapping Tertiary-Quaternary ba... more Processing of multispectral ASTER data were used for detection and mapping Tertiary-Quaternary basalt flow around Madinah area, Saudi Arabia which forms part of the north-south alignment of basalt plateaux in the Western part of Arbian Sheild. To identify and map this type of volcanic rocks, Mafic Index (MI), as well as band combinations and band ratio combination were used in the study area. Mafic Index (MI) was high for mafic and ultrmafic rocks, and systematically lower as the rock type change to felsic. False color images of ASTER band combination of 7:3:1 in R:G:B distinguished obviously between different rock units in the study area. On the other hand ASTER band combination of 1:4:8 in R:G:B clearly separate volcanic cone and crater as blue color. A new band ratio combination 6/8:4/8:12/13 successfully mapped basalt flow in the study area as blue color. Decorrelation stretching of TIR band combination 10:12:13 for R:G:B clearly mapped the basalt flow bodies as greenish yellow ...

Research paper thumbnail of Detecting albite granite in the Central Eastern Desert of Egypt using ASTER multi-band thermal infrared

Detecting albite granite in the Central Eastern Desert of Egypt using ASTER multi-band thermal infrared

Research paper thumbnail of Arabian Journal of Geosciences

Arabian Journal of Geosciences

Arabian Journal of Geosciences

Research paper thumbnail of Processing of Multispectral ASTER Data for Mapping Alteration Minerals Zones: As an Aid for Uranium Exploration in Elmissikat-Eleridiya Granites, Central Eastern Desert, Egypt

The Open Geology Journal, 2014

Elmissikat-Eleridiya district is one of the most important uranium localities in the central East... more Elmissikat-Eleridiya district is one of the most important uranium localities in the central Eastern Desert of Egypt. The feature oriented principal component selection (FPCS) and spectral angle mapper (SAM) techniques were applied on ASTER L1B imagery for mapping the common alteration zones. The study revealed that ASTER VNIR-SWIR bands are effectively used for delineating sericite, kaolinite, chlorite, illite and hematite bearing alteration zones, whereas ASTER TIR bands are most effective in delineation of silica-rich zones, which associate and could be used as pathfinder for radioactive mineralization within the study area. The resultant alteration maps show good coincidence with the explored uranium sites and suggest further similar unexplored sites. The results could assist the development of uranium exploration in the study area and other similar localities within the Egyptian deserts.