The Arabian–Nubian Shield Within the Neoproterozoic Plate Tectonic Circuit

Collins, Alan S.; Blades, Morgan; Merdith, Andrew

doi:10.1007/978-3-030-72995-0_8

Cited by 6 publications

(3 citation statements)

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“…The structures related to this event evolved in Saudi Arabia as early as c. 680-640 Ma (Stoeser and Stacey, 1988); the major activity in Egypt was between c. 620 and 580 Ma, that is, after suturing of the Nabitah Suture (Collins et al, 2021a). Plate motion instigated activity of the crustal scale NFS, clearest seen in the CED (Figure 12).…”

Section: Nabitah Suturing-second Far-field Conditionsmentioning

confidence: 99%

“…Structural, tectonic, and isotopic data have newly been released in the form of comprehensive reviews focused on the tectonic evolution of the ED (Greiling et al, 1994;Johnson et al, 2011;Fritz et al, 2013;Stern, 2017;Hamimi et al, 2019;Hamimi and Abd El-Wahed, 2020;El-Kalioubi et al, 2020;Fowler and Hamimi, 2020;Stern and Ali, 2020). In addition, modern platetectonic reconstructions (Collins et al, 2021a;Collins et al, b) provide a far-field tectonic framework for EAO that inspired questions on the credibility of these old basement models and classifications. In the present study we develop a new tectonic map of ENS that incorporates these new studies.…”

Section: Introductionmentioning

confidence: 99%

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The Tectonic Map and Structural Provinces of the Late Neoproterozoic Egyptian Nubian Shield: Implications for Crustal Growth of the Arabian–Nubian Shield (East African Orogen)

et al. 2022

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The Late Neoproterozoic Egyptian Nubian Shield (ENS) has attracted increasing attention since the establishment of the Egyptian Geological Survey and Mining Authority (EGSMA (1896)), which conducted the first mapping. In the last three decades, rapid improvements in analytical techniques, along with field-oriented studies, have made it possible for the interpretation of the ENS as an integral part of the juvenile Arabian–Nubian Shield (ANS) as a portion of the East African Orogen (EAO). However, a consistent tectonic map of the ENS does not exist. Presentation of such a map is the main objective of the present work where Landsat-based lithological discrimination is combined with the systematic structural investigation and careful reassessment of previously published geological maps. Our interpretation of this map indicates that in accordance with previous work, the basement units of the Eastern Desert (ED) can be divided into three structural domains: Northern, Central, and South-Eastern Desert provinces. The proposed provinces are ascribed to three different plate tectonic far-field boundary conditions. The earliest magmatic, metamorphic, and tectonic history was set off by the approximate north–south convergence of the Gabgaba-Gebeit, Jiddah-Asir terranes, and Eastern Desert-Midyan terranes along the Yanbo-Onib-Sol-Hamid-Gerf-Allaqi-Heiani (YOSHGAH) suture between c. 800 and 620 Ma. The second event between c. 640 and 580 Ma was correlated with the Nabitah Orogeny when the Ad Dawadimi-Ar Rayn terranes in the eastern Arabian Shield accreted to the earlier consolidated arc terranes (Afif and Tathlith terranes). During this period, east–west convergence between northwestern Saudi Arabia and the Central Eastern Desert (CED) in Egypt caused a pronounced strike-slip deformation associated with the displacement along the wider Najd Fault system. The third orogenic phase, which was younger than c. 580 Ma, was controlled by the evolution and retreat of the Cadomian Arc. The northern portions of the ENS and the northern Arabian Shield experienced extension whereas extensive post-orogenic magmatism was related to mantle delamination and associated crustal thinning.

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Section: Nabitah Suturing-second Far-field Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Tectonic Map and Structural Provinces of the Late Neoproterozoic Egyptian Nubian Shield: Implications for Crustal Growth of the Arabian–Nubian Shield (East African Orogen)

et al. 2022

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“…S ¸engör et al ( 2020) recently suggested the Tuareg Shield, Arabian-Nubian Shield, and portions of the Saharan Metacraton constitute a single volcanic arc system that was segmented and recombined in a fashion very similar to the Kazakhstan and Mongolian oroclines. We tentatively accept this model for the Tuareg Shield and Saharan Metacraton, but include the younger Arabian Nubian Shield in the East African Orogen (Figure 8), whilst appreciating a likely continuity of orogenesis from one to the other (Blades et al, 2021;Collins et al, 2021a). Our use of Brasiliano Orogen encompasses all the South American Gondwanaforming orogens, as well as orogens along the west coast of Africa that correlate with them (including the West Congo Orogen, the Rokelides, the Gariep Belt and the Kaoko Belt).…”

Section: Neoproterozoic To Mesozoic Orogensmentioning

confidence: 79%