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001-es BibID:	BIBFORM113482
035-os BibID:	(Scopus)85161370373
Első szerző:	El-Desoky, Hatem M.
Cím:	Detecting Oxides Mineralization Utilizing Remote Sensing and Comprehensive Mineralogical Analysis: A Case Study Around Mikbi-Zayatit District, South Eastern Desert, Egypt / Hatem El-Desoky, Ali Shebl, Hamada El-Awny, Mahmoud El-Rahmany, Omar Soliman
Dátum:	2023
ISSN:	2414-6064 2663-8754
Megjegyzések:	Undoubtedly, involving more tools, datasets, and techniques for detecting the mineralized areas sharply narrow the zones to be investigated and delivered, in most cases highly potential zones. Consequently, this study is an attempt to apply remote sensing data including Sentinel 2 and ASTER, field observations, petrography of the hydrothermal alteration processes, ore microscopic investigations, X-ray examinations, and EDX analysis to detect and emphasize mineralization types at Wadi Mikbi and Wadi Zayatit district, South Eastern Desert, Egypt. Towards accurate lithological mapping, remote sensing data, previous geological maps, and the field investigations recorded serpentinites, ophiolitic metagabbros, amphibolites, epidosite, arc-related metasediments (schists and quartzites), metagabbro-tonalite complex, dunite, olivine gabbros, and granitic rocks encountered in the study district. Additionally, various hydrothermal alterationzones have been primarily outlined using ASTER and Sentinel 2 data by implementing informative band ratios and constrained energy minimization techniques. The mineralogical studies have confirmed most of the remotely-detected hydrothermal alteration minerals. Ore microscopy, XRD technique, and EDX microchemical analysis of representative mineralized samples of the study district identified magnetite, ilmenite, titanomagnetite, chromite, magnesioferrite, quartz, apatite, clinochlore, plagioclase, pyroxene and epidote. Cross-linking remote sensing results, field observations and laboratory studies revealed that the dominant hydrothermal alteration processes include oxidization, serpentinization, carbonatization, epidotization, silicification, zoisitization, muscovitization, sericitization, and chloritization. Spatial overlay analysis of the resultant altered features, structural dissection, field observations, and analytical studies were integrated to build a mineral potentiality map of the study district.
Tárgyszavak:	Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Remote sensing Alteration zones Ore mineralogy Eastern Desert Egypt
Megjelenés:	Iraqi Geological Journal. - 56 : 1E (2023), p. 97-130. -
További szerzők:	Shebl, Aly (1992-) (geológus) El-Awny, Hamada El-Rahmany, Mahmoud M. Soliman, Omar
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM107208
035-os BibID:	(WoS)000872370100001 (Scopus)85140010447
Első szerző:	El-Desoky, Hatem M.
Cím:	Multiscale mineralogical investigations for mineral potentiality mapping of Ras El-Kharit-Wadi Khashir district, Southern Eastern Desert, Egypt / Hatem M. El-Desoky, Ali Shebl, Ahmed M. Abdel-Rahman, Wael Fahmy, Hamada El-Awny, Anas M. El-Sherif, Mahmoud M. El-Rahmany, Árpád Csámer
Dátum:	2022
ISSN:	1110-9823 2090-2476
Megjegyzések:	Through various scales of observation, ranging from remote sensing data, field investigations, hand specimens, microscopic petrographic examinations, XRD, to SEM, indicators of various mineralization types are highlighted in Ras El-kharit-wadi Khashir (Eastern Desert, Egypt). Systematic remote sensing explo- ration of the mineralized zones is performed through integrating Sentinel 2 and ASTER datasets. False- color combinations, informative band ratios, relative absorption band depth, and CEM techniques were applied to discriminate rock units and various types of hydrothermal alterations. Moreover, ALOS PALSAR DEM was utilized to decipher the structural lineaments. Intensive field investigations confirmed hydrothermally altered zones that were picked out through remote sensing analysis and revealed that the study area is affected by cataclastic metamorphism to some extent. Magmatic and metamorphic rock types are represented by propylitic, phyllic, argillic, and silicification zones. Sericitization, chloritization, epidotization, kaolinitization, carbonatization, and silicification are recorded utilizing petrographic and remote sensing investigations. Moreover, the current study reveals that the detected alteration is the main reason for the apparent wide range of petrographic characteristics of each rock type and bearing several opaque minerals, such as pyrite, magnetite, titanomagnetite, chalcopyrite, arsenopyrite, covellite, galena, goethite, and hematite. Most of these opaques were identified using ore microscopy, XRD, and SEM. The distribution of hydrothermal alterations, representative samples bearing mineralization, structurally dissected zones are integrated to build a mineral potentiality map of the study area. The resultant MPM was confirmed via field survey and emphasized the usefulness of the current integrated approach besides highlighting about 125 km2 as potential mineralized zones.
Tárgyszavak:	Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Sentinel 2 ASTER Hydrothermal alteration Ore mineralogy Eastern desert
Megjelenés:	Egyptian Journal of Remote Sensing and Space Science. - 25 : 4 (2022), p. 941-960. -
További szerzők:	Shebl, Aly (1992-) (geológus) Abdel-Rahman, Ahmed M. Fahmy, Wael El-Awny, Hamada El-Sherif, Anas M. El-Rahmany, Mahmoud M. Csámer Árpád (1976-) (geológus)
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001-es BibID:	BIBFORM113375
035-os BibID:	(cikkazonosító)826 (WoS)001017187600001 (Scopus)85163963917
Első szerző:	Shebl, Aly (geológus)
Cím:	Impact of DEMs for Improvement Sentinel 2 Lithological Mapping Utilizing Support Vector Machine: A Case Study of Mineralized Fe-Ti-Rich Gabbroic Rocks from the South Eastern Desert of Egypt / Ali Shebl, Hatem M. El-Desoky, Ahmed M. Abdel-Rahman, Wael Fahmy, Hamada El-Awny, Anas El-Sherif, Mahmoud M. El-Rahmany, Árpád Csámer
Dátum:	2023
ISSN:	2075-163X
Megjegyzések:	Fused remote sensing datasets have greatly contributed to enhancing lithological targets and providing significant information for mineral exploration. For instance, multispectral datasets can discriminate rock units through their unique spectral signatures. Digital Elevation Models (DEMs) could be an effective tool boosting lithological discrimination based mainly on their topographic variations. Consequently, the current study applied the power of the support vector machine (SVM) algorithm and the integrated Phased Array L-type band Synthetic Aperture Radar (PALSAR) DEM and multispectral Sentinel 2 data to: 1-Create an updated lithological map of a poorly mapped arid terrain (Khashir-Ras El-Kharit district, Eastern Desert of Egypt), and 2-Compare and assess the distribution of ferrogabbros with the aim of improving the localization of these rock bodies and investigating their mineral content. Our results enhanced the lithological mapping and revealed a better generalization of mineralized ferrogabbros when the input was a fused DEM with Sentinel 2 compared to the salt and pepper effect observed when adopting the Sentinel 2 solely as the input data. Additionally, the current research strongly recommends detailed exploration programs for Fe-Ti oxide ores within the gabbroic rocks delineated through the resultant thematic map. The ferrogabbros were subjected to a comprehensive analysis involving whole rock geochemistry, XRD, EDX, and lightreflecting investigations, which revealed the existence of magnetite, titanomagnetite, and hematite. The titanomagnetite crystals display subhedral morphology and exhibit fine- to medium-grained surfaces with irregular shapes. X-ray diffraction (XRD) analysis revealed the presence of magnetite and hematite in the concentrated Fe-Ti oxides. Additionally, the whole rock geochemistry highlighted the origin of the ferrogabbros and their proposed tectonic setting as an alkaline to calc-alkaline magma type that developed in a continental arc setting
Tárgyszavak:	Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk lithological mapping Sentinel 2 DEMs Eastern Desert gabbroic rocks Fe-Ti oxides
Megjelenés:	Minerals. - 13 : 6 (2023), p. 1-36. (cikkazonosító) 826-. -
További szerzők:	El-Desoky, Hatem M. Abdel-Rahman, Ahmed M. Fahmy, Wael El-Awny, Hamada El-Sherif, Anas M. El-Rahmany, Mahmoud M. Csámer Árpád (1976-) (geológus)
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