5674
Hebatullah Said Ali Ibrahim Mubarak
Metasomatic alterations and economic
potentialities of Neoproterozoic ophiolite rocks
at the Um Rashid-Hagar Dungash area, centralEastern Desert, Egypt
Ophiolitic, Serpentinite, rodingit
Ophiolitic rocks at the Um Rashid–Hagar Dungash (URHD) area are located at the southern part of the central Eastern Desert of Egypt, the northwestern corner of the ArabianNubian Shield (ANS). They represent the southern extension of El-Barramiya ophiolite sequence. They are dismembered, strongly deformed, metamorphosed, and show various degrees of alterations. Serpentinites form the main component of the URHD ophiolite with less common metagabbro that are found as blocks of various sizes within the ophiolitic mélange. The serpentinized ultramafic rocks are divided into partly serpentinized peridotite, massive serpentinite, sheared serpentinite and carbonated serpentinite. They host chromitite pods that occur as lenticular bodies exhibiting variation in size representing massive and nodular types. Alteration of the ophiolitic mafic-ultramafic rocks in the area of study led to the development of talc-carbonate, magnesite, rodingite and listvenite.
2021
M.Sc
Cairo
Science