Three successive Proterozoic island arcs in the Northern Arabian–Nubian Shield: Evidence from SIMS U–Pb dating of zircon

Eyal, M.; Be’eri-Shlevin, Yaron; Eyal, Yehuda; Whitehouse, Martin J.; Litvinovsky, B.A.

doi:10.1016/j.gr.2013.03.016

Cited by 95 publications

(55 citation statements)

References 63 publications

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“…It is undeformed and unmetamorphosed, but subjected to late-magmatic and subsolidus alteration. This is consistent with the view that the onset of calc-alkaline post-collisional magmatism occurred at~620 Ma in the western Feiran-Solaf area and at~610 Ma at the eastern Kid area (Eyal et al 2014). The mafic-intermediate intrusion at Gebel Sheikh El-Arab area contains volcanic and clastic xenoliths of Rutig Formation and intruded the calc-alkaline syntectonic granodiorite, therefore it is regarded as post-collisional (post-tectonic setting) intrusion.…”

Section: Discussionsupporting

confidence: 88%

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The petrogenesis of late Neoproterozoic gabbro/diorite intrusion at Sheikh El-Arab area, central Sinai, Egypt

et al. 2014

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The late Neoproterozoic gabbro/diorite intrusion (~11.7 km 2 ) at Sheikh El-Arab area represents the only mafic exposure in the basement rocks of Katharina province of central Sinai largely occupied by granitoids and their volcanic equivalents. The field relations indicate that the intrusion is younger than the lower unit (630-615 Ma) of the volcanics and clastics of the Rutig Formation, and older than the surrounding granodiorites of Sheikh El-Arab and Rahaba (~610 Ma) plutons. It is not affected by regional metamorphism or ductile deformation, but recorded petrographic uralitization/amphibolitization signature. It is composed chiefly of pyroxene-hornblende gabbro, diorite, and quartz diorite. The chemical composition of the mafic minerals indicated that the suite was derived from calc-alkaline magma. Geochemically, the studied rocks are characterized by enrichment of LILE relative to HFSE and LREE relative to HREE. The gabbros are notably low in total REE (38-56 ppm) with (La/Yb) n =2.7-4.8, while the dioritic rocks are high in ΣREE (142-161 ppm) with high (La/Yb) n values (12.5-15.8); both are characterized by the absence of Eu anomaly, their Eu/Eu* ratios are close to unity (0.93-1.11). The studied intrusion evolved from mafic mantle magma into different types by assimilation fractional crystallization process (AFC) and/or gradual decrease in oxygen fugacity. The initial magma corresponds, most probably, to pyroxene-hornblende gabbro and the crystallization of hornblende was ascribed by slight H 2 O increase in magma after crystallization of near-liquidus clinopyroxene with high Ca content (Wo 42-52 ) and Ca-rich plagioclase (An 80-83 ). The intrusion is related to the later calcalkaline substage of post-collisional tectonic setting.

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Section: Discussionsupporting

confidence: 88%

“…Stern and Hedge 1985;Stern 1994;Beyth et al 1994;Abdel-Rahman 1995;Jarrar et al 2003;Moussa et al 2008;Be'eri-Shlevin et al 2009a;Eyal et al 2010;Farahat et al 2011). Recently, however, Eyal et al (2014) recorded shift of ages of similar stages in the northeastern and southern areas of Sinai.…”

Section: Introductionmentioning

confidence: 99%

The petrogenesis of late Neoproterozoic gabbro/diorite intrusion at Sheikh El-Arab area, central Sinai, Egypt

et al. 2014

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“…This age is comparable to the U-Pb zircon crystallization age of granodiorite of the Wadi Feiran area recorded by Kröner et al (1994;796±6 Ma) and by Stern and Manton (1987;782±7 Ma). The age of the dacite overlaps also with the Feiran-Elat arc system (870-740 Ma) proposed by Eyal et al (2014). This arc system is compatible with the oldest magmatic pulse (799-785 Ma) as suggested by Abu El-Enen and Whitehouse (2013).…”

Section: Geochronological Contextsupporting

confidence: 80%

The South Um Mongul Cu-Mo-Au prospect in the Eastern Desert of Egypt: From a mid-Cryogenian continental arc to Ediacaran post-collisional appinite-high Ba-Sr monzogranite

El‐Rahman

Seifert

Gutzmer

et al. 2017

Ore Geology Reviews

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“…1.0 Ga old rocks and rocks with detrital zircons of that age are present (Be'eri-Shlevin et al, 2012;Eyal et al, 2014). Their relation with the ANS is not clear.…”

Section: The Arabo-nubian Shield (Ans)mentioning

confidence: 97%

The relations between Gondwana and the adjacent peripheral Cadomian domain—constrains on the origin, history, and paleogeography of the peripheral domain

Garfunkel

2015

Gondwana Research

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Three successive Proterozoic island arcs in the Northern Arabian–Nubian Shield: Evidence from SIMS U–Pb dating of zircon

Cited by 95 publications

References 63 publications

The petrogenesis of late Neoproterozoic gabbro/diorite intrusion at Sheikh El-Arab area, central Sinai, Egypt

The petrogenesis of late Neoproterozoic gabbro/diorite intrusion at Sheikh El-Arab area, central Sinai, Egypt

The South Um Mongul Cu-Mo-Au prospect in the Eastern Desert of Egypt: From a mid-Cryogenian continental arc to Ediacaran post-collisional appinite-high Ba-Sr monzogranite

The relations between Gondwana and the adjacent peripheral Cadomian domain—constrains on the origin, history, and paleogeography of the peripheral domain

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