Gold-related Alteration Zones Detection at the Um Balad Area, Egyptian Eastern Desert, using Remote Sensing, Geophysical, and GIS Data Analysis

Hegab, Mahmoud A.; Mousa, Salah Eldin; Salem, Salem Mohamed; Farag, Karam S.I.; GabAllah, Hossam M.

doi:10.1016/j.jafrearsci.2022.104715

Cited by 17 publications

(4 citation statements)

References 26 publications

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“…The mining sites with several mineralization types fall within the drainage system and move with flooding to mangrove sites and are retained in sediment. This mineralization includes (copper, lead, zinc, gold, iron, and manganese) verified by Nour et al ( 2019 ), Baioumy ( 2021 ), Abdelkareem and El-Shazly ( 2022 ), and Hegab et al ( 2022 ). The existence of these mineralization sites within the stream network that ends up in the mangrove sites suggests the concentration of several heavy minerals being driven through the drainage network naturally.…”

Section: Discussionmentioning

confidence: 66%

Assessment of heavy metals at mangrove ecosystem, applying multiple approaches using in-situ and remote sensing techniques, Red Sea, Egypt

Mohammed,

Khalifa,

Mohamed

et al. 2024

Environ Sci Pollut Res

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Mangrove areas are considered the most retention zone for heavy metal pollution as it work as an edge that aggregates land and sea sediments. This study aims to examine if the heavy metals’ existence in the mangrove sediment is related to contamination or natural resources. In addition, it gives an interpretation of the origin of these metals along the Egyptian Red Sea coast. Twenty-two samples of mangrove sediments were collected and then, analyzed for metals (Mn, Ni, Cu, Fe, Cd, Ag, and Pb) using inductively coupled plasma mass spectroscopy (ICP-MS). Integration between the in-situ data, contamination indices, and remote sensing and geographical information science (GIS), and multivariate statistical analysis techniques (PCA) were analyzed to assess and clarify the spatial origin of heavy metals in sediment at a regional scale. The average concentration of heavy metals from mangrove sediments were shown to be substantially lower than the referenced value, ranging from moderate to significant except the levels of Ag were very high. The heavy metals concentrations were expected to be naturally origin rather than anthropogenic and that be confirmed by mapping of Red Sea alteration zones spots. These alteration zones are parallel to mangrove sites and rich by several mineralization types including heavy metals that are carried by flooding to the coastline. Remote sensing and GIS techniques successfully contributed to interpreting the pattern of the origin of heavy metals and discharging systems that control the heavy metals concentration along the Red Sea coast.

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Section: Discussionmentioning

confidence: 66%

Assessment of heavy metals at mangrove ecosystem, applying multiple approaches using in-situ and remote sensing techniques, Red Sea, Egypt

Mohammed,

Khalifa,

Mohamed

et al. 2024

Environ Sci Pollut Res

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“…These chemical facies are de ned by cherts, manganiferous and carbon-rich sediments, Fe-Ca-Mg carbonates as well as sulphide mineral disseminations. Gold mineralization has been discovered in association with hydrothermal veins that are rich in sulphide minerals within this area's alteration zones (Hegab et al, 2022). Furthermore, arsenopyrite, chalcopyrite, galena, pyrite and sphalerite have been identi ed among the sulphide minerals that are disseminated throughout both the rocks themselves and their alteration zones (Hammond & Tabata, 1997).…”

Section: Geologymentioning

confidence: 98%

The Concealed Perils to Public Health: Origins of Emerging Non-Communicable Illnesses (NCDs) in Mining Regions of Ghana

Arhin,

Osei,

Yevugah

et al. 2023

Preprint

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Artisanal and Small-Scale Gold Mining (ASGM) has a rich historical background in Ghana, contributing to over 40% of the country's gold production. However, current ASGM practices have neglected responsible mining operations, resulting in environmental degradation and adverse health impacts. A comprehensive study analyzed 3344 soil samples from a mining district in Ghana, revealing high concentrations of arsenic (As), lead (Pb), copper (Cu), and zinc (Zn). These elements are associated with gold mineralization within the Birimian System. The likely causes of these elevated levels include heavy metal accumulations during mining activities as well as pesticide/fertilizer usage on farms - which is the primary occupation within this study area alongside ASGM operations. The study identified areas enriched with potentially harmful double-sword elements that require small amounts for human development- indicating serious environmental health concerns within these zones. The highest recorded values were up to 246 ppm for As, 148 ppm for Pb, 87 ppm for Cu, and 200 ppm for Zn. Notably, elevated concentrations of As occurred at Agrave, Bogoso, Juabeng, Gyaba. Gyeduakese etc., while high levels of Pb were found at Bogoso, Agrave, Beposo, Wassa Bekwae, Asaasetre, Donkorworano, Samreboi, Odumase, Anhwerem locations; Cu had high concentrations near Bawdie and Moseaso while Zn was highly concentrated at Kwao Mensah, Kokoasi, Ayensukrom Hamatuo and Abotarey sites. In conclusion, this paper recommends establishing baseline pollution status measurements before commencing any mining activities followed by regular monitoring to ensure safety standards are maintained - especially regarding the population living around mining communities' good health rights protection.

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“…Despite the frequent and thorough investigations for carbonate alteration-related mineralization, their small size and lack of recording on large-scale geological maps 12 , 20 , 33 , 34 , hinder marbles investigations as a host for economic mineral deposits within the ANS. In addition to the critical need for exploration-based economic evaluation of the ANS's recorded Au and U-bearing marbles (to decipher their potential as a new gold and uranium geological trap), research into their origin can provide new insights into the conventional tectonic model of ANS 2 , 35 .…”

Section: Introductionmentioning

confidence: 99%

Multiscale (microscopic to remote sensing) preliminary exploration of auriferous-uraniferous marbles: A case study from the Egyptian Nubian Shield

Shebl

Hamdy

2023

Sci Rep

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Since their recent first record within the Egyptian Nubian Shield, auriferous and uraniferous marbles (Au = 0.98–2.76 g/t; U = 133–640 g/t) have rarely been addressed, despite not only their probable economic importance but also the fact that it is a new genetic style of gold and uranium mineralization in the Nubian Shield rocks. This is mainly attributed to the inadequate localization of these marbles within harsh terrains, as well as the cost and time spent with conventional fieldwork for their identification compared to the main lithological components of the Nubian Shield. On the contrary, remote sensing and machine learning techniques save time and effort while introducing reliable feature identification with reasonable accuracy. Consequently, the current research is an attempt to apply the well-known machine learning algorithm (Support vector Machine—SVM) over Sentinel 2 remote sensing data (with a spatial resolution of up to 10 m) to delineate the distribution of auriferous-uraniferous marbles in the Barramiya-Daghbagh district (Eastern Desert of Egypt), as a case study from the Nubian Shield. Towards better results, marbles were accurately distinguished utilizing ALOS PRISM (2.5 m) pan-sharpened Sentinel 2 data and well-known exposures during fieldwork. With an overall accuracy of more than 90%, a thematic map for auriferous-uraniferous marbles and the major rock units in the Barramiya-Daghbagh district was produced. Marbles are spatially related to ophiolitic serpentinite rocks, as consistent with their genesis within the Neoproterozoic oceanic lithosphere. Field and petrographic investigations have confirmed the newly detected Au and U-bearing zones (impure calcitic to impure dolomitic marbles in Wadi Al Barramiya and Wadi Daghbagh areas and impure calcitic marble in Gebel El-Rukham area). Additionally, X-ray diffraction (XRD), back-scattered electron images (BSEIs), and Energy Dispersive X-ray spectroscopy (EDX) results were integrated to verify our remote sensing results and petrographic investigations. Different times of mineralization are indicated, ranging from syn-metamorphism (gold in Wadi Al Barramiya and Gebel El-Rukham) to post-metamorphism (gold in Wadi Daghbagh and uranium in all locations). Based on the application of geological, mineralogical, machine learning and remote sensing results for the construction of a preliminary exploration model of the auriferous-uraniferous marble in the Egyptian Nubian Shield, we recommend a detailed exploration of Au and U-bearing zones in Barramiya-Dghbagh district and applying the adopted approach to other districts of similar geological environments.

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Gold-related Alteration Zones Detection at the Um Balad Area, Egyptian Eastern Desert, using Remote Sensing, Geophysical, and GIS Data Analysis

Cited by 17 publications

References 26 publications

Assessment of heavy metals at mangrove ecosystem, applying multiple approaches using in-situ and remote sensing techniques, Red Sea, Egypt

Assessment of heavy metals at mangrove ecosystem, applying multiple approaches using in-situ and remote sensing techniques, Red Sea, Egypt

The Concealed Perils to Public Health: Origins of Emerging Non-Communicable Illnesses (NCDs) in Mining Regions of Ghana

Multiscale (microscopic to remote sensing) preliminary exploration of auriferous-uraniferous marbles: A case study from the Egyptian Nubian Shield

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