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001-es BibID:	BIBFORM116227
035-os BibID:	(Scopus)85170693997 (WoS)001192927200059
Első szerző:	Abdel-Rahman, Ahmed M.
Cím:	The geochemistry, origin, and hydrothermal alteration mapping associated with the gold-bearing quartz veins at Hamash district, South Eastern Desert, Egypt / Ahmed M. Abdel-Rahman, Hatem M. El-Desoky, Ali Shebl, Hamada El-Awny, Yahia Z. Amer, Árpád Csámer
Dátum:	2023
ISSN:	2045-2322
Megjegyzések:	Integrating diverse techniques and datasets, significantly enhances the accurate identification of various mineral deposits. This work aims to determine different types of mineral deposits in the Hamash district (Southern Eastern Desert, Egypt) by combining structural features (derived from ALOS PALSAR DEM), alteration zones (detected using ASTER and Sentinel-2), and ore mineralogy. Multispectral imaging, such as ASTER and Sentinel-2 satellite data, provides a cost-effective and efficient tool for lithological and hydrothermal alteration mapping utilizing selective band ratios (SBR), directed principal component analysis (DPCA), feature-oriented false-color composites (FFCC), and constrained energy minimization (CEM). The deductions drawn from the analysis of ASTER and Sentinel 2 satellite data are solidly corroborated through meticulous investigations of pre-existing lithological maps in the study area, on-site validation via fieldwork, and robust laboratory analysis, attesting to reliable results. Validation of remote sensing results was performed through field observations, petrographic investigations, X-ray diffraction technique (XRD), and SEM?EDX analyses. Based on ore mineralogy derived from XRD and SEM results the quartz-vein-associated ore minerals in the Hamash district include chalcopyrite, pyrite, hematite, goethite, bornite, covellite, and gold. According to the present paragenesis, the mineralization in the study area is classified into three types: sulfide mineralized zone, transitional zone, and supergene zone. Using an ore microscope, our studies identified that the alteration zones include gold-bearing sulfide minerals as well as the minerals goethite and malachite. In gold-bearing quartz samples, the concentrations of Cu, As, Ag, and Sb are positively correlated with Au at the degree of shear deformation. According to data gathered from the fire assay results, Au content varied from 0.027 to 57.20 ppm, along with Cu (10?6484 ppm), Ag (0.5?20.5 ppm), As (5?2046 ppm), Zn (3?1095 ppm), Pb (2?1383 ppm), and Sb (5?23). Our results confirmed that the Hamash region is one of the most important gold-bearing sites, with gold concentrations ranging from 0.027 up to 57.20 ppm. Furthermore, the current contribution highlighted four stages in the paragenetic sequence of the recorded ores, including magmatic, metamorphic, hydrothermal, and supergene by origin, indicating a considered similarity with the known Egyptian gold sites regarding host rocks, mineralization style, alteration assemblage, and several ore mineral conditions.
Tárgyszavak:	Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	Scientific Reports. - 13 : 1 (2023), p. 1-27. -
További szerzők:	El-Desoky, Hatem M. Shebl, Ali (1992-) (geológus) El-Awny, Hamada Amer, Yahia Z. Csámer Árpád (1976-) (geológus)
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001-es BibID:	BIBFORM136828
035-os BibID:	(WoS)001735290600002
Első szerző:	Atalla, Mohamed A.
Cím:	Integrating fuzzy AHP and geospatial modeling for wind farm suitability assessment in Kuwait / Mohamed A.Atalla, Ayad M. FadhilAl-Quraishi, Elsayed A. BadawyAtaalla, Ali Shebl, Árpád Csámer, Wael M.Al-Metwaly
Dátum:	2026
ISSN:	2045-2322
Megjegyzések:	In response to global energy depletion, this study addresses the critical challenge of selecting optimal wind farm sites in Kuwait, a key pillar of the "New Kuwait" 2035 vision for 15% renewable energy integration. A robust, hybrid Multi-Criteria Decision-Making (MCDM) framework was developed, integrating Fuzzy Analytical Hierarchy Process (FAHP) with Entropy-based objective weighting and Type-2 Fuzzy logic within a GIS environment. This approach effectively mitigates expert subjectivity and manages the high "Footprint of Uncertainty" inherent in complex desert environments. Twenty-six technical, environmental, and socioeconomic criteria?including wind power density, proximity to the national grid, and oil field restrictions?were analyzed at a modern utility-scale hub height of 100 m. The spatial results identified approximately 1444 km? (8.6%) of Kuwait's territory as ' Highly Suitable' for wind development, primarily concentrated in the western (Al-Jahra) and northern (Al-Abali) corridors. Validation against existing Shagaya Renewable Energy Park and Global Wind Atlas data confirmed a strong spatial correlation (R2 = 0.84). The identified zones represent a potential generation capacity of 2500 MW, providing a data-driven roadmap for national energy planners to meet sustainability targets while minimizing land-use conflicts with oil production and urban expansion.
Tárgyszavak:	Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Wind farm sitting Sustainable development goals (SDGs) GIS Fuzzy AHP Multi-criteria decision making (MCDM) Geo-spatial modeling Kuwait
Megjelenés:	Scientific Reports. - 16 : 1 (2026), p. 1-25. -
További szerzők:	Al-Quraishi, Ayad M. Fadhil Ataalla, Elsayed A. Badawy Shebl, Ali (1992-) (geológus) Csámer Árpád (1976-) (geológus) Al-Metwaly, Wael M.
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001-es BibID:	BIBFORM111657
035-os BibID:	(Scopus)85157963782 (WoS)001025221700001
Első szerző:	Shebl, Ali (geológus)
Cím:	Towards better delineation of hydrothermal alterations via multi-sensor remote sensing and airborne geophysical data / Ali Shebl, Mahmoud Abdellatif, Mohamed Badawi, Maher Dawoud, Amr S. Fahil, Árpád Csámer
Dátum:	2023
ISSN:	2045-2322
Megjegyzések:	Integrating various tools in targeting mineral deposits increases the chance of adequate detection and characterization of mineralization zones. Selecting a convenient dataset is a key for a precise geological and hydrothermal alteration mapping. Remote sensing and airborne geophysical data have proven their efficiency as tools for reliable mineral exploration. Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER), Advanced land imager (ALI), Landsat 8 (L8), and Sentinel 2 data are widely?used data among various types of remote sensing images in resolving lithological and hydrothermal alteration mapping over the last two decades. ASTER is a well?established satellite in geological remote sensing with detailed Short?wave infrared (SWIR) range compared to visible and near?infrared region (VNIR) that controls iron?associated alteration detection. On contrary, ALI has excellent coverage of the VNIR area (6 bands), but does not possess the potentiality of ASTER for the SWIR and thermal regions. Landsat 8 is widely used and highly recommended for lithological and hydrothermal alteration mapping. The higher spatial (up to 10 m) resolution of Sentinel 2 MSI has preserved its role in producing accurate geological mapping. Notwithstanding the foregoing, implementing the four datasets in a single study is time?consuming. Thus, an important question when commencing an exploration project for hydrothermal alterations?related mineralization (orogenic mineral deposits in the current research) is: which dataset should be adopted to fulfill proper and adequate outputs? Here the four widely recommended datasets (ASTER, ALI, L8, and sentinel 2) have been tested by applying the widely?accepted techniques (false color combinations, band ratios, directed principal component analysis, and constrained energy minimization) for geological and hydrothermal alteration mapping of Gabal El Rukham?Gabal Mueilha district, Egypt. The study area is covered mainly by Neoproterozoic heterogeneous collection of ophiolitic components, island arc assemblage, intruded by enormous granitic rocks. Additionally, airborne magnetic and radiometric data were applied and compared with the remote sensing investigations for deciphering the structural and hydrothermal alteration patterns within the study area. The results demonstrated a different extent from one sensor to another, highlighting their varied efficacy in detecting hydrothermal alterations (mainly hydroxyl?bearing alterations and iron oxides). Moreover, the analysis of airborne magnetic and radiometric data showed hydrothermal alteration zones that are consistent with the detected alteration pattern. The coincidence between high magnetic anomalies, high values of the K/eTh ratio, and the resultant alterations confirm the real alteration anomalies. Over and above that, the remote sensing results and airborne geophysical indications were verified with fieldwork and petrographic investigations, and strongly recommend combining ASTER and Sentinel 2 results in further investigations. Based on the outputs of the current research, we expect better hydrothermal alteration delineation by adopting the current findings as they sharply narrow the zones to be further investigated via costly geophysical and geochemical methods in mineral exploration projects.
Tárgyszavak:	Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	Scientific Reports. - 13 : 1 (2023), p. 1-27. -
További szerzők:	Abdellatif, Mahmoud Badawi, Mohamed Dawoud, Maher Fahil, Amr S. Csámer Árpád (1976-) (geológus)
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001-es BibID:	BIBFORM135636
Első szerző:	Shereif, Aya S. (Geologist)
Cím:	Gamma activity concentrations of 226Ra, 232Th, 40K, and health hazard assessments of granites from Wadi El-Nabi` mining area, Egyptian Nubian Shield / Aya S. Shereif, Mohamed Th. S. Heikal, Abdel Salam Abu El Ela, Ahmed El Shabasy, Ahmed E. Masoud, Árpád Csámer
Dátum:	2026
ISSN:	2045-2322
Megjegyzések:	Granitic rocks constitute one of the most prevalent and economically significant lithologies, owing to their abundance, mechanical durability, and aesthetic appeal, which render them highly suitable as ornamental stones in architectural and construction applications. In recent years, extensive research efforts have been directed toward quantifying the radiological hazards posed by naturally occurring radioactive materials within these rocks, concerning their potential implications for human health and environmental safety when utilized in building materials. In the present study, a comprehensive radiometric investigation was conducted on 35 granitic rock samples of Wadi El-Nabi' mining area, specifically El-Igl El-Ahmer monzo-syenogranites, to quantify the activity concentrations of principal radionuclides, including 226Ra, 232Th, and 40K, utilizing gamma spectrometry with a high-purity germanium (HPGe) detector. Furthermore, an array of radiological hazard indices was systematically calculated to evaluate the potential radiological risks associated with these granitoid specimens. Our findings indicate that the mean activity concentrations of 226Ra, 232Th, and 40K in the monzogranite samples were 29 (??6), 34 (??6), and 883 (??49) Bq/kg, respectively. In comparison, the syenogranite samples exhibited slightly elevated average values, measured at 31 (??5), 35 (??4), and 890 (??9) Bq/kg for the corresponding radionuclides, reflecting a modest enrichment in radioactivity within the syenogranitic lithology. With respect to the radiological parameters, the results indicate that Dout, Din, AEDEin, ELCRout, ELCRin, I?, and AGDE for both monzogranite and syenogranite samples exceed the internationally recommended reference levels. Conversely, Raeq, AEDEout, Hex, and Hin remain within acceptable global thresholds. 232Th/226Ra (238U) ratios for the monzogranite and syenogranite samples range from 0.88 to 1.39 (mean 1.15???0.14) and 0.88 to 1.41 (mean 1.14???0.16), respectively. These values are markedly lower than the canonical crustal Th/Ra ratio of?~?3.5, indicating post-magmatic hydrothermal alteration and selective uranium enrichment within the host granitoids. This radiological evidence is reinforced by remote sensing observations, which reveal characteristic alteration patterns, including kaolinization, sericitization, fluoritization, and silicification zones, that are spatially associated with the monzo-syenogranitic units, especially in the buffer location. Consequently, the granitic rocks in certain localized areas, particularly where radionuclide concentrations or radiological hazard indices exceed typical thresholds, may be considered unsuitable for use as construction materials.
Tárgyszavak:	Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Gamma Index HPGe detector health hazard indices Wadi El- Nabi' mining area Egyptian Nubian Shield hydrothermal alteration
Megjelenés:	Scientific Reports. - 2026 : 1 (2026), p. 1-76. -
További szerzők:	Heikal, Mohamed Th. S. El Ela, A. M. Abu El Shabasy, Ahmed Masoud, Ahmed E. Csámer Árpád (1976-) (geológus)
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