tawfeek.mahran

Tawfiq Mohamed Mahran

Professor - أستاذ

Faculty of science

Address: Geology Dept. - Faculty of Science- Sohag University

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Facies architecture And Sequence Stratigraphy of Early Syn-Rift Siliciclastic Deposits In Hamadat Half graben Basin, South Quseir, Red Sea, Egypt

2017 | Keywords Half grabens, Synrift, siliciclastics, lacustrine,
Facies architecture And Sequence Stratigraphy of Early Syn-Rift Siliciclastic Deposits In Hamadat Half graben Basin, South Quseir, Red Sea, Egypt
Tectono-stratigraphic analysis of Early Syn-Rift Siliciclastic Deposits of Nakheil and Ranga Formations, based on outcrop data from Hamadat Half Graben basin, south Quseir indicates that the evolution of normal faulting was an important role on syn rift depositional patterns and sequence stratigraphic development. The Nakheil Formation was deposited in depocentres formed during the low subsidence rift initiation phase. The Nakheil ... Read more

Geomorphic evolution and karst landforms of the Eocene limestone plateau , west of the Nile Valley (Sohag), Egypt: implications for geohazards and impacts

2017 | Keywords Karst, paleodolines, paleosurfaces, Geomorphic,
Geomorphic evolution and karst landforms of the Eocene limestone plateau , west of the Nile Valley (Sohag), Egypt: implications for geohazards and impacts
Most of the limestones in the Eocene Carbonate plateau, west of the Nile Valley (Sohag), are affected repeatedly by karst processes, and different landforms related to limestone dissolution occurred. However, there is no published literature available dealing with the detailed studies of the karstification process and associated karst landforms in this study area. Therefore, this study focuses on paleoerosion surfaces ... Read more

Normal faulting control on the stratigraphiy of the Early Syn Rift synrift lacustrine/shallow marine sequences, south Quseir, Red Sea, Egypt

2014 | Keywords normal faulting, Half grabens, synsedimentary, lacustrine,
Normal faulting control on the stratigraphiy of the Early Syn Rift synrift lacustrine/shallow marine sequences, south Quseir, Red Sea, Egypt
Tectono-stratigraphic analysis of Late Oligocene-Early Miocene Nakheil and Ranga Formations, based on outcrop data from Hamadat and Zug El Bohar half-graben basins, south Quseir, indicates that the evolution of normal fault segments was an important control on syn-rift depositional patterns and sequence stratigraphic development. Sedimentological and stratigraphic analysis of the Nakheil Formation indicates that it was deposited in a series ... Read more

Facies changes and tectonic-climatic controls on the development of Late Oligocene-Miocene sediments (Pre-Eonile and Eonile phases) of the Egyptian Nile west of Sohag

2013 | Keywords climate, Eonile, Miocene,
Facies changes and tectonic-climatic controls on the development of Late Oligocene-Miocene sediments (Pre-Eonile and Eonile phases) of the Egyptian Nile west of Sohag
The geological mapping, landstat images, and detailed sedimentological analysis through measurements of 10 stratigraphic columnar sections, have revealed the presence of four facies associations among the Pre-Eonile and Eonile sediments along the Egyptian Nile west of Sohag. These reflect the co-effect of local and regional tectonics, changes of the catchment areas and paleoclimatology, and were related to four successive tectono-sedimentary ... Read more

Facies, sequence stratigraphy and factors controlling Plio-Pleistocene lacustrine sedimentation of the area around Sohag , Nile Valley, Egypt

2007 | Keywords facie, travertine, ؛Palustrine,
Facies, sequence stratigraphy and factors controlling Plio-Pleistocene lacustrine sedimentation of the area around Sohag , Nile Valley, Egypt
The outcropping Plio-Pleistocene lacustrine sediments around Sohag area extends as a separate belt occupying the proximity of fault-controlled escarpment, and are represented by the laterally interfingering Issawia and Armant formations. Based on lithofacies changes three models of lacustrine sedimentation could be identified; mixed siliciclastic-carbonates (modele 1), dominanatly siliciclastics (model, 2), and dominanantly carbonates sediments (model 3). In the first model ... Read more

Facies and sequence stratigraphy of the syn-rift Miocene mixed carbonate-siliciclastic sediments of Sidri-Feiran area, southwestern Sinai, Egypt

2007 | Keywords siliciclas, carbonates, Syn rift,
Facies and sequence stratigraphy of the syn-rift Miocene mixed carbonate-siliciclastic sediments of Sidri-Feiran area, southwestern Sinai, Egypt
The Miocene syn-rift mixed carbonate-siliciclastic sediments of_ Sidri-Feiran area provide a good example_ for the co-effect of the rift tectonics and eustatic sea level changes on carbonate siliciclastic _sedimentation_ These syn-rift Miocene sediments had been affected by four major tectonic events during Miocene time. These are the early-clysmic, post-Nukhul, mid-clysmic and post Karem tectonic events. Facies variations, tectonic events and ... Read more

Plio-Quaternary continental sedimentation in El Qaa and Sidri extensional basins, southwest Sinai, Egypt: Tectonic and Paleoclimatic controls

2006 | Keywords Sidri, El Qaa, Plio-Quaternary,
Plio-Quaternary continental sedimentation in El Qaa and Sidri extensional basins, southwest Sinai, Egypt: Tectonic and Paleoclimatic controls
El Qaa and Sidri basins, located in SW Sinai Penensuila, are considered continental, fault bounded rift basins, resulting from NW- SE extensional faulting throughout the continuous rifting processes of the main Gulf of Suez basin. The Plio-Quaternary sediments, localized in El Qaa and Sidri basins, represent a model of mixed alluvial fans, fluvial siliciclastics, aeolian and lacustrine carbonates facies. Three ... Read more

Sedimentology and sequence stratigraphy of Oligocene-Miocene sediments in the area south of Wadi Um Gheig, Red Sea Egypt. Effects of eustasy and tectonics

2006 | Keywords
Sedimentology and sequence stratigraphy of Oligocene-Miocene sediments in the area south of Wadi Um Gheig, Red Sea Egypt. Effects of eustasy and tectonics
The Oligocene-Middle Miocene sedimentary sequence cropping out in the area south of Wadi Um Gheig, situated some 50 Km south of Quseir, is subdivided into three units; 1- Abu Ghusun Formation, 2- Ranga Formation, and 3- Um Mahara Formation. Development of these units and styles of deposition as well as lateral and vertical variations of grain size parameters in combination ... Read more

The impact of rift tectonics, paleoclimate and provenance on textural and mineralogical characteristics of syn-rift Miocene sediments of Sidri-Feiran area, southwestern Sinai, Egypt

2001 | Keywords Gulf of Suez, paleoclimate,
The impact of rift tectonics, paleoclimate and provenance on textural and mineralogical characteristics of syn-rift Miocene sediments of Sidri-Feiran area, southwestern Sinai, Egypt
The syn-rift Miocene siliciclastic sediments of Sidri-Feiran area on the eastern side of the Gulf of Suez provide an excellent example for the tectonics, paleoclimate and provenance control on sedimentation in rifted regions. Field relationships, grain size analysis, microscopic investigation, heavy and light mineralogy, and X-ray diffraction analysis of the clay minerals have revealed that:1) the siliciclastic sediments of the ... Read more

Cyclicity and sequence stratigraphy of syn-rift Late Neogene mixed carbonates-siliciclastics of the area between Wadi Zug El Bohar and Wadi Dabr, Red Sea, Egypt.

2000 | Keywords Pliocene, sequence stratigraph, Neogene, carbonates, Cycles, ,
Cyclicity and sequence stratigraphy of syn-rift Late Neogene mixed carbonates-siliciclastics of the area between Wadi Zug El Bohar and Wadi Dabr, Red Sea, Egypt.
THE LATE OLIGOCENE SEDIMENTS ARE REPRESENTED BY MIXED SILLICICLASTICS AND CARBONATES DEPOSITED UNDER CYCLICAL DEPOSITIONAL CONDITIONS. BASED ON SIZE VARIATIONS AND MIXING OF FACIES, SIX DIFFERENT TYPES OF CYCLES ARE RECOGNIZED; FINING-UPWARD CYCLES, COARSENING-UPWARD CYCLES, MIXED FLUVIAL-LACUSTRINE CARBONATE CYCLES, MIXED FLUVIAL-RESTRICTED MARINE CARBONATE CYCLES, MIXED SILICICLASTIC-OPEN MARINE CARBONATE CYCLES AND DOMINANTLY OPEN MARINE CARBONATE CYCLES. THE DEVELOPMENT OF CYCLIC SEDIMENTATION ... Read more