Petrogenesis and tectonic evolution of tourmaline- bearing leucogranites, Sikait area, Southeastn desert of Egypt utilizing mineralogical and bulk rock analysis.

ABSTRACT: The current research discuss in detail the tourmaline distribution in Sikait leucogranites in order to deduce its genesis and type. We conduct new detailed geological, petrographical, mineralogical, and geochemical examinations to understand the Arabian Nubian Shield development by investigation of such the examined leucogranites. Tourmaline occurs as disseminated or cluster nodular within coarse-grained leucogranites. Geochemically, the examined leucogranites have high contents of SiO₂ (69.44-75.87 wt%), and total alkalis (mean > 7) with low mean CaO (0.4 wt%), Fe₂O₃ (1.93 wt%), and Mg# (14.59) values. They share features of calc-alkaline, strongly peraluminous (A/CNK > 1.1), with high contents of Zn (av. 266.68 ppm), Pb (av. 29.13 ppm), Rb/Sr (av. 22), Al

SUBMITTER: Saleh GM 

PROVIDER: S-EPMC12181361 | biostudies-literature | 2025 Jun

REPOSITORIES: biostudies-literature