Subsurface stratigraphy and micropaleontology of the Neogene rocks, Nile Delta, Egypt

Ismail, Ahmed Aly; Boukhary, Mohamed; AbdelNaby, Ahmed Ibrahim

doi:10.4154/gc.2010.01

Cited by 23 publications

(15 citation statements)

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“…(a) Pre‐Oligocene paleogeography of Africa. Blue shading = minimum extent of Cenomanian marine deposition [ Sahagian , ]; black shading = distribution of indurated laterite during Paleogene times [ Burke and Gunnell , ]; gray shading = distribution of lateritic gravels; blue lobes at coastline = major deltas with Paleogene carbonate reef deposits [ Nyagah , ; Salman and Abdula , ; Séranne and Nzé Abeigne , ; Ismail et al , ]. (b) Early Neogene paleogeography of Africa.…”

Section: Drainage Network and River Profilesmentioning

confidence: 99%

The African landscape through space and time

2014

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Key Points:• We invert large sets of longitudinal river profiles. Fits to data are excellent • Our history of uplift is consistent with independent geological calibration • We have reconstructed the evolution of dynamic topography in Africa since 50 Ma Abstract It is generally accepted that Cenozoic epeirogeny of the African continent is moderated by convective circulation of the mantle. Nevertheless, the spatial and temporal evolution of Africa's "basin-and-swell" physiography is not well known. Here we show how continental drainage networks can be used to place broad constraints on the pattern of uplift through space and time. First, we assemble an inventory of 710 longitudinal river profiles that includes major tributaries of the 10 largest catchments. River profiles have been jointly inverted to determine the pattern of uplift rate as a function of space and time.Our inverse model assumes that shapes of river profiles are controlled by uplift rate history and modulated by erosional processes, which can be calibrated using independent geologic evidence (e.g., marine terraces, volcanism and thermochronologic data). Our results suggest that modern African topography started to develop ∼30 Myr ago when volcanic swells appeared in North and East Africa. During the last 15-20 Myr, subequatorial Africa was rapidly elevated, culminating in the appearance of three large swells that straddle southern and western coasts. Our results enable patterns of sedimentary flux at major deltas to be predicted and tested. We suggest that the evolution of drainage networks is dominated by rapid upstream advection of signals produced by a changing pattern of regional uplift. An important corollary is that, with careful independent calibration, these networks might act as useful tape recorders of otherwise inaccessible mantle processes. Finally, we note that there are substantial discrepancies between our results and published dynamic topographic predictions.

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Section: Drainage Network and River Profilesmentioning

confidence: 99%

The African landscape through space and time

2014

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“…The Late Miocene age is suggested by the occurrence of Sphaeroidinellopsis disjuncta in the top of the Abu Madi Formation (Ismail et al, 2010). Ward (1996) classified the Abu Madi Formation into three types (I, II, III), according to its petrology.…”

Section: Introductionmentioning

confidence: 99%

Reservoir characterization of the Lower Abu Madi Formation using core analysis data: El-Wastani gas field, Egypt

Kassab

Teama

Cheadle

et al. 2015

Journal of African Earth Sciences

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“…GPS (Leica viva GS15) was used for calculating two Bench Marks (BM), one of them in Port-Said at 31°15′31.32′′N and 32°16′35.83′′E and another one in Port-Fouad at 31°14′46.59′′N and 32°18′54.66′′E (Figure 4). The geology of Port-Said is composed of thick layers of sands and pebbles at its base (Pleistocene Mit Ghamr Formation) which are overlain by coastal sands and deposits from the Nile floods (Holocene Bilqas Formation) [45]. The plate tectonic development of the eastern Mediterranean plays an important role in shaping the Nile Delta region.…”

Section: Field Workmentioning

confidence: 99%

“…The Governorate is bounded by the Mediterranean Sea from the north, Lake Manzala from the west, Lake Malaha from the east, and has a total area of about 1351 km 2 with an approximate population of 517,216 [44]. The geology of Port-Said is composed of thick layers of sands and pebbles at its base (Pleistocene Mit Ghamr Formation) which are overlain by coastal sands and deposits from the Nile floods (Holocene Bilqas Formation) [45]. The plate tectonic development of the eastern Mediterranean plays an important role in shaping the Nile Delta region.…”

Section: Study Area and Geological Settingmentioning

confidence: 99%

Minimizing the Residual Topography Effect on Interferograms to Improve DInSAR Results: Estimating Land Subsidence in Port-Said City, Egypt

2017

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Abstract:The accurate detection of land subsidence rates in urban areas is important to identify damage-prone areas and provide decision-makers with useful information. Meanwhile, no precise measurements of land subsidence have been undertaken within the coastal Port-Said City in Egypt to evaluate its hazard in relationship to sea-level rise. In order to address this shortcoming, this work introduces and evaluates a methodology that substantially improves small subsidence rate estimations in an urban setting. Eight ALOS/PALSAR-1 scenes were used to estimate the land subsidence rates in Port-Said City, using the Small BAse line Subset (SBAS) DInSAR technique. A stereo pair of ALOS/PRISM was used to generate an accurate DEM to minimize the residual topography effect on the generated interferograms. A total of 347 well distributed ground control points (GCP) were collected in Port-Said City using the leveling instrument to calibrate the generated DEM. Moreover, the eight PALSAR scenes were co-registered using 50 well-distributed GCPs and used to generate 22 interferogram pairs. These PALSAR interferograms were subsequently filtered and used together with the coherence data to calculate the phase unwrapping. The phase-unwrapped interferogram-pairs were then evaluated to discard four interferograms that were affected by phase jumps and phase ramps. Results confirmed that using an accurate DEM (ALOS/PRISM) was essential for accurately detecting small deformations. The vertical displacement rate during the investigated period (2007)(2008)(2009)(2010) was estimated to be −28 mm. The results further indicate that the northern area of Port-Said City has been subjected to higher land subsidence rates compared to the southern area. Such land subsidence rates might induce significant environmental changes with respect to sea-level rise.

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Subsurface stratigraphy and micropaleontology of the Neogene rocks, Nile Delta, Egypt

Cited by 23 publications

References 0 publications

The African landscape through space and time

The African landscape through space and time

Reservoir characterization of the Lower Abu Madi Formation using core analysis data: El-Wastani gas field, Egypt

Minimizing the Residual Topography Effect on Interferograms to Improve DInSAR Results: Estimating Land Subsidence in Port-Said City, Egypt

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