Utilization of full-polarimetric SAR data (RADARSAT-2), ASTER and Landsat 8 data in geological mapping of the west Gebal Elba area, Halayeb district, South Eastern Desert, Egypt

2019 ◽  
Vol 47 (2) ◽  
pp. 267-278
Author(s):  
Hassan Mohy ◽  
Islam Abou El-Magd ◽  
Fawzy Basta ◽  
Ali Amasha
Keyword(s):  
Eastern Desert ◽  
Geological Mapping ◽  
Landsat 8 ◽  
Polarimetric Sar ◽  
The West ◽  
South Eastern ◽  
Sar Data

scholarly journals Multispectral and Radar Data for the Setting of Gold Mineralization in the South Eastern Desert, Egypt

2019 ◽  
Vol 11 (12) ◽  
pp. 1450 ◽  
Author(s):  
Basem Zoheir ◽  
Ashraf Emam ◽  
Mohamed Abdel-Wahed ◽  
Nehal Soliman
Keyword(s):  
Synthetic Aperture Radar ◽  
Gold Mineralization ◽  
Eastern Desert ◽  
Synthetic Aperture ◽  
The South ◽  
Quartz Veins ◽  
South Eastern ◽  
Vein Formation ◽  
Band Ratios ◽  
Sar Data

Satellite-based multi-sensor data coupled with field and microscopic investigations are used to unravel the setting and controls of gold mineralization in the Wadi Beitan–Wadi Rahaba area in the South Eastern Desert of Egypt. The satellite-based multispectral and Synthetic Aperture Radar (SAR) data promoted a vibrant litho-tectonic understanding and abetted in assessing the regional structural control of the scattered gold occurrences in the study area. The herein detailed approach includes band rationing, principal component and independent component analyses, directional filtering, and automated and semi-automated lineament extraction techniques to Landsat 8- Operational Land Imager (OLI), Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER), Phased Array L-band Synthetic Aperture Radar (PALSAR), and Sentinel-1B data. Results of optical and SAR data processed as grayscale raster images of band ratios, Relative Absorption Band Depth (RBD), and (mafic–carbonate–hydrous) mineralogical indices are used to extract the representative pixels (regions of interest). The extracted pixels are then converted to vector shape files and are finally imported into the ArcMap environment. Similarly, manually and automatically extracted lineaments are merged with the band ratios and mineralogical indices vector layers. The data fusion approach used herein reveals no particular spatial association between gold occurrences and certain lithological units, but shows a preferential distribution of gold–quartz veins in zones of chlorite–epidote alteration overlapping with high-density intersections of lineaments. Structural features including en-echelon arrays of quartz veins and intense recrystallization and sub-grain development textures are consistent with vein formation and gold deposition syn-kinematic with the host shear zones. The mineralized, central-shear quartz veins, and the associated strong stretching lineation affirm vein formation amid stress build-up and stress relaxation of an enduring oblique convergence (assigned as Najd-related sinistral transpression; ~640–610 Ma). As the main outcome of this research, we present a priority map with zones defined as high potential targets for undiscovered gold resources.

Utilizing Landsat-8 and ASTER data in geologic mapping of hyper-arid mountainous region: case of Gabal Batoga area, South Eastern Desert of Egypt

2020 ◽  
Vol 79 (5) ◽  
Author(s):  
Mohamed F. Sadek ◽  
Baher A. El-kalioubi ◽  
Mohamed W. Ali-Bik ◽  
Mariam A. El Hefnawi ◽  
Ahmad A. Elnazer
Keyword(s):  
Eastern Desert ◽  
Landsat 8 ◽  
Mountainous Region ◽  
Geologic Mapping ◽  
Aster Data ◽  
South Eastern

Remote Sensing Aplication and Geochemical Studies for Hydrocarbon-Induced Alterations Discoveries in Western Kendeng Zone

2020 ◽  
Author(s):  
F., R. Maulana
Keyword(s):  
Xrd Analysis ◽  
Research Area ◽  
Geological Mapping ◽  
Hydrocarbon Exploration ◽  
Distribution Area ◽  
Landsat 8 ◽  
Test Results ◽  
Iron Sulfides ◽  
The South ◽  
The West

The development of satellite imaging technology that has spectral capability has the potential to be utilized in hydrocarbon exploration. The presence of hydrocarbons can be detected through spectral recording of hydrocarbon seepage. Over a long period, hydrocarbon seepage will change the chemical structure and mineralogy of the surrounding soil and rocks, so that it will cause spectral anomalies that are key to the existence of active hydrocarbons and petroleum systems. The West Kendeng zone was chosen as a research location because several hydrocarbon seepage sites were found to contain, either oil or gas in the area. Based on hydrocarbon seepage spectral theory, Landsat 8 imagery has a wavelength spectrum capability that is sensitive to the anomalous object of hydrocarbon seepage. Therefore, this research was conducted to determine the distribution of hydrocarbon seepage areas in the West Kendeng zone by using Landsat 8 imagery. In addition to using Landsat 8, to strengthen the research results a surface geological mapping process was also carried out at the seepage location. Then the samples obtained were analyzed by XRD and XRF. XRD analysis was carried out to determine the types of minerals that became an anomaly around the seepage location. In addition, the XRF analysis is carried out to determine the chemical composition of rocks that have undergone alteration. Based on the results of Landsat 8 data calibration, an altered rock which is an anomaly of hydrocarbon seepage is found in the south and southwest of the study site. These results are confirmed by the location of the discovery of several points of seepage of hydrocarbons in the research area. The XRD test results also showed anomalous clay mineral content in the form of halloysite, albite, and augite in the southwest and south of the study site. Besides this anomaly, magnetite and pyrite were also found at that location. While the XRF test results from the sample also showed the presence of Fe2O3 element at 9.21% and CaO at 7.42% in the south and southwest of the study location. This indicates a reaction between hydrocarbons and rocks that affect the acidity conditions around them, so they will form clay minerals, iron oxides, and iron sulfides. Therefore, based on Landsat 8 image analysis, XRD, and XRF, a hydrocarbon seepage distribution area accumulated in the Bancak, Boto, Wonokerto, and Nyemoh areas in the Semarang Regency.

Utilization of airborne gamma ray spectrometric data for geological mapping and radioactive mineral exploration of Gabel Umm Tineidba area, south eastern desert, Egypt

2015 ◽  
Vol 12 (2) ◽  
pp. 149-160 ◽  
Author(s):  
Tharwat H. Abdel Hafeez ◽  
Mohamed A. S. Youssef ◽  
Waheed H. Mohamed
Keyword(s):  
Gamma Ray ◽  
Mineral Exploration ◽  
Eastern Desert ◽  
Geological Mapping ◽  
Gamma Ray Spectrometry ◽  
Spectrometric Data ◽  
South Eastern ◽  
Uranium Exploration ◽  
Geological Information ◽  
Surface Geology

The present work utilizes airborne gamma ray spectrometric data in a trial to refine surface geology of igneous, metamorphic and sedimentary rocks, detect any radioactive mineralization at Gabel Umm Tineidba area South Eastern Desert, Egypt. The study area is covered by rock exposures ranging in age from the Precambrian to Quaternary. Airborne gamma ray spectrometry can be very helpful in mapping surface geology. This provides estimates of the apparent surface concentrations of the most common naturally occurring radioactive elements, such as potassium (K), equivalent uranium (eU) and equivalent thorium (eTh). This is based on the assumption that, the absolute and relative concentrations of these radioelements vary measurably and significantly with lithology. The composite image technique is used to display simultaneously three parameters of the three radioelement concentrations and their three binary ratios on one image. The technique offers much in terms of lithological discrimination, based on color differences and showed efficiency in defining areas, where different lithofacies occur within areas mapped as one continuous lithology. The integration between surface geological information and geophysical data led to detailing the surface geology and the contacts between different rock units. Significant locations or favourable areas for uranium exploration are defined, where the measurements exceed (X+2S), taking X as the arithmetic mean of eU, eU/eTh and eU/K measurements and S as the standard deviation corresponding to each variables. The study area shows the presence of fifteen relatively high uraniferous zone. In addition, the trend analysis based on the total count map and the published geological map shows that, most of the well-developed structural lineaments have NS, ENE, NNE and NNW trends.

Using ASTER images and field work data for geological mapping around Wadi Umm Ashira and Wadi Tilal Al-Qulieb, Northwestern part of Wadi Allaqi, South Eastern Desert, Egypt

2021 ◽  
Vol 14 (18) ◽  
Author(s):  
Nehal Mohamed Soliman ◽  
Hatem Mohamed El-Desoky ◽  
Mohamed Ahmed Heikal ◽  
Ahmed Mohamed Abdel-Rahman
Keyword(s):  
Field Work ◽  
Eastern Desert ◽  
Geological Mapping ◽  
Northwestern Part ◽  
South Eastern
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