Mahrous M. Abu El-Enen

Mansoura University · Department of Geology

Compiled U–Pb and Pb–Pb zircon ages from the Sinai Peninsula Precambrian basement record a crustal history covering of a time span of ~450 Ma, which reflects a complex history of magmatism, sedimentation, and metamorphism extending from ca. 1030–578 Ma. Three magmatic main age populations are recognized at 1025–975, 850–725, and 650–575 Ma and are...

Imperial Porphyry, a famous dimension stone of spectacular purple color, was quarried in the Mons Porphyrites area north of Jabal Dokhan in the Eastern Desert of Egypt, from the beginning of the first until the middle of the fifth century AD. During this period, the valuable material was processed as decorative stone and was used for objects of art...

The southeastern sector of the Hafafit Metamorphic Complex, southern Eastern Desert of Egypt comprises infrastructural orthogneisses of tonalite and syenogranite parentage, amphibolites, and a volcano-sedimentary association. These are overthrust by an obducted suprastructural ophiolite nappes via the Nugrus thrust. The protolith of the biotite-hor...

The southeastern sector of the Hafafit Metamorphic Complex, southern Eastern Desert of Egypt comprises infrastructural orthogneisses of tonalite and syenogranite parentage, amphibolites, and a volcano-sedimentary association. These are overthrust by an obducted suprastructural ophiolite nappes via the Nugrus thrust. The protolith of the biotite–hor...

The depositional age of the Wadi Zaghra metasediments (Zaghra Formation) of the Sa’al-Zaghra metamorphic complex (Sinai) in the Arabian–Nubian Shield (ANS) has been constrained by LA-ICP-MS dating of zircons from (1) metaconglomerate granitoid clasts, (2) the metaconglomerate matrix, (3) biotite-schist, and (4) diorites and granites intruding the m...

The Kid Group is one of the few exposures of Neoproterozoic metavolcano-sedimentary rocks in the basement of southern Sinai in the northernmost Arabian–Nubian Shield. It is divided into the mostly metamorphosed volcaniclastic Melhaq and siliciclastic Um Zariq formations in the north and the mostly volcanic Heib and Tarr formations in the south. The...

Metapelites are exposed at Wadi Ba’ba, east of Abu Zenima city; represent the northwestern extension of the Fieran-Solaf Metamorphic Complex, Sinai Peninsula, Egypt. The metapelites are characterized by qtz + pl (An24–28) + bt + grt ± crd ± sil mineral assemblage, indicating upper amphibolite facies with peak metamorphic conditions of 700 °C and pr...

The JEBEL Field conference in Sinai (Oct. 25-29, 2008) provided an opportunity to investigate two unresolved issues in the basement of Sinai: 1) the possible exposure of ~1Ga crust in the northernmost Sinai basement (Zaghra metaconglomerate), and 2) the age of the Kid metamorphic core complex (fi g. 1). These are two of the most important metamorph...

Two migmatite occurrences of contrasting origins from the Neoproterozoic metamorphic complexes of Taba and Feiran‐Solaf in southern Sinai Peninsula, Egypt are investigated. The migmatites of the Feiran‐Solaf metamorphic complex occur as sporadic patches in the Feiran gneisses. The leucosomes of the migmatites have tonalitic, granitic, and trondhjem...

The northern part of the Kid metamorphic complex, SE Sinai Peninsula, Egypt, comprises a thick sequence of volcano-sedimentary association, defined as Mahlaq Formation. It is composed predominantly of rhyodacitic to andesitic, less commonly of subalkaline basaltic metavolcanics and metatuffs interbedded and intercalated with metapelites and metagra...

Petrology, mineral chemistry, and age dating of the metapelitic schists and gneisses in three metamorphic complexes of Sinai have been studied and reported with the aims of characterizing the nature, type, and age of metamorphism as well as the metamorphic evolution of the Sinai metamorphic complexes. Nine representative samples of metapelitic schi...

Accessory tourmaline in metasediments from the Sinai crystalline basement exhibits textural and chemical signatures that relate to the evolution of regional metamorphism and deformation during the Pan-African orogeny and testifies to different P-T path segments. Tourmaline inclusions in various porphyroblasts were formed during the prograde phase o...

At the northeastern flank of Gebel Yelleq, northern Sinai, pure limestones of Upper Cretaceous age were subjected to a thermal overprint, caused by a c. 80m thick Tertiary olivine dolerite sill. Metasomatic supply of Si, Al, Fe, Mg and Ti was greater to the c. 7m wide upper than to the c. 25m wide lower thermal aureole. The greater width of the low...

The Taba metamorphic belt (TMB) is one of four Pan-African metamorphic belts of the Sinai Peninsula forming the north-ernmost extension of the East African Orogen. The TMB underwent two main phases of ductile deformation accompanied by a single metamorphic event. Critical metamorphic mineral assemblages in the metapelitic rocks testify to regional...

The Kid Belt, one of the four metamorphic belts constituting the Pan-African basement of the Sinai Peninsula, underwent two main phases of ductile deformation and regional metamorphism ranging in grade from the greenschist facies in the south to the upper amphibolite facies in the northeast. In the central western part of the Kid Belt, metapelites...

The northeastern part of the Kid metamorphic belt includes infrastructural rock assemblages of ortho-amphibolites, orthogneisses, and metasediments, overthrusted by suprastructural serpentinized peridotites. However, mobilized infrastructural components are represented by pinkish fine-grained gneisses. Basic volcanic protolith of the ortho-amphibol...

Two volcanic occurrences from southern Sinai were sampled for paleomagnetic, petrographic and geochemical investigations. 29 oriented samples were taken from six sites of the Middle Jurassic basaltic intrusion at Wadi Budra, southwest Sinai (28°55′N, 33°20′E). After alternating field (AF) demagnetization and tilt correction, all samples exhibit nor...

The gneisses of Taba Metamorphic Belt (TMB) are classified in terms of field, structural, mineralogical and geochemical criteria into two suites of different ages. The older suite, concentrated in the northern part of the study area, comprises three relatively highly deformed gneiss types of predominantly quartz-dioritic to tonalitic composition. T...

Wadi Seih area is covered by “Old Granites”, porphyritic granites, mafic-ultramafic cumulates, rhyolite porphyries, Younger Granites and Post-Granite Dykes which represent ≥200 Ma of Pan African orogeny.G-I “Old Granites” are given mainly by tonalites, monzodiorites and qz-monzodiorites. They are derived from calc-alkaline metaluminous to peralumin...