Geology of Dakhla Oasis, Western Desert, Egypt

Zaghloul, Elsayed A.

doi:10.1007/978-3-030-64005-7_3

Cited by 5 publications

(3 citation statements)

References 4 publications

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“…Phanerozoic sediments include the Thebes Group Formation, thinly bedded outer shelf chalk, and chalky limestone rich in chert bands and concretions. Near Quseir city, there are more biogenic and nodular limestone with uppermost middle Eocene beds [24]. The Umm Gheig Formation is a crystalline carbonate, algal, local reefal limestone.…”

Section: Location and Geologymentioning

confidence: 99%

Geophysical Assessment of Structurally Controlled Mineral Resources at Wadi El-Nakheel, Eastern Desert, Egypt

Al Deep,

Ibrahim,

Saleh

2024

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It is of great importance to evaluate simple methods to identify mineral occurrence for the future development of society. Applying a reconnaissance magnetic data analysis can help detect the main structural trends mounted to the occurrence of minerals. In this study, geological and geophysical data were analyzed to evaluate the main structural trends affecting mineralization in the area of Wadi El-Nakheel. Geomagnetic data were processed to remove the earth’s magnetic field and reduce the magnetic pole. Some mathematical filters related to detecting and enhancing boundaries between rock units, depending on their magnetization affinity, were applied, including the first vertical derivative, the analytic signal, and 3D Euler deconvolution. After structural analysis of these data, we reached the following findings: The main structural trends from the surface and subsurface estimations were the northwest–southeast trend and the northeast–southwest trend. The orientation and origin of Wadi El-Nakheel are aligned with the main structural trend affecting the area that formed during the Red Sea Rift movement and the Pan-African orogeny. The depth of the deep-seated structure controlling the valley is 1500 m and all mineral occurrence is mainly structurally controlled in the studied area; phosphate ore outcrops are usually aligned with the northwest–southeast geological trend, and metallic ores are related to basement rock succession and the main dominant geological structures in the studied area. Finally, the magnetic method was demonstrated to be a reliable tool for detecting the subsurface boundary between geologic units.

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Section: Location and Geologymentioning

confidence: 99%

Geophysical Assessment of Structurally Controlled Mineral Resources at Wadi El-Nakheel, Eastern Desert, Egypt

Al Deep,

Ibrahim,

Saleh

2024

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“…Recently, a titanosaurian sauropod, Mansourasaurus shahinae, was recovered from the upper member of the formation north of the road between Mut and Balat [59], along with sauropod and non-avian theropod remains [60]. The Quseir Variegated Shales has few useful index fossils and so its age is uncertain, but it is typically assigned to the Campanian [49,55,59,[61][62][63]. The Duwi Formation, 10-25 m thick, comprises several phosphatic layers separated by dark beds of shale.…”

Section: Stratigraphy and Agementioning

confidence: 99%

A Prognathodontin Mosasaur from the Maastrichtian of the Dakhla Oasis, Western Desert, Egypt

El-Kheir,

Shaker,

Street

et al. 2023

Fossil Studies

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Mosasaurs were diverse in the Upper Cretaceous in Africa, but relatively little is known about the mosasaur fauna of Egypt. Here, associated teeth and postcranial skeletal elements are reported for a mosasaur from the Maastrichtian Dakhla Shale of the Dakhla Oasis. The specimen includes tooth crowns, cervical, dorsal, and caudal vertebrae, and ribs. Teeth and bones exhibit features allowing referral to Prognathodontini. The teeth are relatively straight and blunt, suggesting affinities with Prognathodon overtoni or P. currii. Prognathodontins were important predators in the Maastrichtian of Africa, previously being recorded in Morocco, Congo, and Angola.

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“…The Abu-Tartur and Dakhla Oasis region of Egypt is renowned for its geological significance and abundant mineral resources [1,3]. The exposed rock formations in this area span from the Upper Cretaceous to Lower Eocene and Quaternary periods [16], (Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

Lithostratigraphic study of the phosphate bearing sedimentary sequence of some occurrences in Dakhla Oasis, Western Desert, Egypt

Fekry,

Abu Aly,

Said

et al. 2023

New Valley University Journal of Basic and Applied Sciences

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The south of the Western Desert of Egypt exhibits well exposures of Late Cretaceous successions, represented by the fluvio-marine (Nubian sandstone group) and shallow marine deposits. The phosphate bearing horizons of Abu-Tartur plateau and Dakhala Oasis are concentrated in the base of Duwi Formation, Campanian age. Duwi Formation uncomfortably overlies Quseir variegated shale and conformably and partially uncomfortably overlain by Maastrichtian Dakhla shale. The phosphate layer of Duwi Formation at Abu-Tartur and Dakhla Oasis regarded as the main sources of the phosphorites of Egypt. This research aims to provide a comprehensive understanding of the geological framework and lithostratigraphic characteristics of the phosphate bearing sedimentary sequences of Dakhla Oasis, which extends from west Abu-Tartur to Gabal-Edmonston in the Dakhla Oasis, with a special focus on phosphorite deposits and the associated non-phosphate interlayers. The study combines regional stratigraphic and lithological investigations to elucidate the vertical and lateral distribution patterns of phosphorite layers. The results will contribute to knowledge of phosphorite formation processes and evaluation of potential resources in the study area.

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Geology of Dakhla Oasis, Western Desert, Egypt

Cited by 5 publications

References 4 publications

Geophysical Assessment of Structurally Controlled Mineral Resources at Wadi El-Nakheel, Eastern Desert, Egypt

Geophysical Assessment of Structurally Controlled Mineral Resources at Wadi El-Nakheel, Eastern Desert, Egypt

A Prognathodontin Mosasaur from the Maastrichtian of the Dakhla Oasis, Western Desert, Egypt

Lithostratigraphic study of the phosphate bearing sedimentary sequence of some occurrences in Dakhla Oasis, Western Desert, Egypt

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