Assessment of magmatic versus post-magmatic processes in the Mueilha rare-metal granite, Eastern Desert of Egypt, Arabian-Nubian Shield

Abstract

This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

Geochemistry and Petrogenesis of Late Ediacaran Rare‐metal Albite Granites of the Arabian‐Nubian Shield

“…2a) (e.g. Helba et al, 1997;Küster, 2009;El Hadek et al, 2016;Abu El-Rus et al, 2017;Seddik et al, 2020). Despite the economic significance of these granites, their origin and evolution are not yet well-understood.…”

“…The ADAG in particular has likewise been assigned by different authors to either magmatic (Asran, 1985;Mohamed, 1993;Jahn, 1996;Renno, 1997) or metasomatic origins (Sabet et al,1976;Kamel and E1 Tabbal, 1980). In fact, the distinction between magmatic and metasomatic processes may not be as absolute as once thought (Lundstrom, 2016;Azer et al, 2019aAzer et al, , 2020Seddik et al, 2020).…”

“…The style of mineralization of these granites differs from one pluton to another (e.g. Moghazi et al, 2015;El Hadek et al, 2016;Abu El-Rus et al, 2017;Seddik et al, 2020). The rare-metal granites of the ANS have received much attention due to their substantial economic significance as sources of Nb, Ta, rare-earth elements (REE), U, Zr and Th (e.g.…”

Magmatic and hydrothermal evolution of highly-fractionated rare-metal granites at Gabal Nuweibi, Eastern Desert, Egypt

“…One of the most striking features of the Eastern Desert of Egypt, the northwestern segment of the ANS, is the abundance of post-collisional felsic plutons (Azer et al, 2019(Azer et al, , 2020Seddik et al, 2020;Abuamarah et al, 2021). The evolution of the Nuweibi intrusion is discussed here in light of the current data and post-collisional magmatism in the northern ANS.…”

“…Generally, post-orogenic granites J o u r n a l P r e -p r o o f evolved from calc-alkaline (630-600 Ma) to alkaline (610-590 Ma) character, with some overlap in their ages (Ali et al, 2009;Eliwa et al, 2014). They include a number of discrete, shallowlyemplaced A-type and highly fractionated I-type igneous complexes, with significant enrichment in some ores (Helba et al, 1997;Abou El Maaty and Ali Bik, 2000;El Hadek et al, 2016;Abu El-Rus et al, 2017;Sami et al, 2017Sami et al, , 2018Heikal et al, 2019;Azer et al, 2019Azer et al, , 2020Seddik et al, 2020, Abuamarah et al, 2021. The abundance of these post-orogenic granites is of geodynamic interest, as they represent a significant addition of material into the juvenile crust of the ANS over a relatively short time interval.…”