Matches in SemOpenAlex for { <https://semopenalex.org/work/W4322006312> ?p ?o ?g. }
Showing items 1 to 61 of
61
with 100 items per page.
- W4322006312 abstract "Nile River, the longest river in the world (>6,500 km), has been studied since long time ago tracing back to the fifth century yet the timing of origin of its present-day drainage is still disputed. There are two end-members of notions of the birth of the Nile, the first one believes that the present-day Nile has been connected to the Ethiopian Plateau since ~30 Ma, while the other supports the idea of young Nile around ~6 Ma. The Nile crosses today two former endorheic systems (Sudanese and Albertine “Basins”) and one exorheic system (Tethys Margin) before finally depositing sediments in the Mediterranean Sea. Our objective here focuses on deciphering the source-to-sink scenario of the Nile through relief growth, tectonic, and climate since the uppermost Cretaceous.The timing of the uplifts and deformation wavelengths are constrained by characterizing and mapping several generations of stepped pediments on DEM and satellite images which then dated using their geometrical relationships with dated magmatic rocks. Additionally, stratigraphic records of the sedimentary basins were studied to complement the dating of the pediments. The authenticity of the approaches is to integrate those data enclosing all the source-to-sink (S2S) systems to construct a coherent scenario of the Nile paleorouting systems especially on the dynamics of its sediment sources.We proposed the following model for the S2S of the Nile where its catchment grew larger southwards through time. First, a significant deformation occurred around the Cretaceous-Paleogene boundary (66 Ma) with the uplift of western limit of the Nile catchment, the Darfur-Ennedi-Tibesti domains, followed by the formation of a main large pediment. Second, this pediment was then flooded during late Paleocene (58-57 Ma) until a subtle high bounding northward the endorheic Sudanese “Basin”. Consequently, carbonate platforms were widely deposited from Paleocene until middle Eocene in the Egypt extending southwards to the former Hudi Lakes in northeast Sudan and there was no siliciclastic supply for the Nile during that time. Third, the first evidence of a fluvial system (“Pre-Eonile” according to Said, 1981) was discovered during late Eocene (~37 Ma) by large channel incisions on top of the carbonate platforms. Contemporaneously, the Uweinat Dome was uplifted and likely acted as the main siliciclastic source during late Eocene to Oligocene. Fourth, the initiation of Red Sea rifts during the Oligocene followed by a major uplift at the scale of north-east Africa (~10 Ma) provoked another plausible siliciclastic source, the Red Sea Hill’s flanks, in addition to the Uweinat Dome. Fifth, during the capture of the Sudanese endorheic system in the Early Pliocene (~4 Ma), the Nile catchment grew significantly larger and the sources were actively provided by the Darfur and Ethiopian Plateau. Finally, during middle-late Pleistocene (< 1 Ma) the Nile completed its present-day catchment by capturing the Albertine endorheic system and the siliciclastic sediments were supplied by the Ethiopian Plateau and the East African Dome." @default.
- W4322006312 created "2023-02-26" @default.
- W4322006312 creator A5006281942 @default.
- W4322006312 creator A5007061034 @default.
- W4322006312 creator A5030392108 @default.
- W4322006312 creator A5072904044 @default.
- W4322006312 date "2023-05-15" @default.
- W4322006312 modified "2023-09-30" @default.
- W4322006312 title "Source-to-sink system evolution of the Nile since 70 Ma" @default.
- W4322006312 doi "https://doi.org/10.5194/egusphere-egu23-7821" @default.
- W4322006312 hasPublicationYear "2023" @default.
- W4322006312 type Work @default.
- W4322006312 citedByCount "0" @default.
- W4322006312 crossrefType "posted-content" @default.
- W4322006312 hasAuthorship W4322006312A5006281942 @default.
- W4322006312 hasAuthorship W4322006312A5007061034 @default.
- W4322006312 hasAuthorship W4322006312A5030392108 @default.
- W4322006312 hasAuthorship W4322006312A5072904044 @default.
- W4322006312 hasConcept C109007969 @default.
- W4322006312 hasConcept C12294951 @default.
- W4322006312 hasConcept C127313418 @default.
- W4322006312 hasConcept C134306372 @default.
- W4322006312 hasConcept C143050476 @default.
- W4322006312 hasConcept C151730666 @default.
- W4322006312 hasConcept C204330871 @default.
- W4322006312 hasConcept C205649164 @default.
- W4322006312 hasConcept C2780030769 @default.
- W4322006312 hasConcept C33923547 @default.
- W4322006312 hasConcept C58640448 @default.
- W4322006312 hasConcept C6494504 @default.
- W4322006312 hasConcept C77928131 @default.
- W4322006312 hasConceptScore W4322006312C109007969 @default.
- W4322006312 hasConceptScore W4322006312C12294951 @default.
- W4322006312 hasConceptScore W4322006312C127313418 @default.
- W4322006312 hasConceptScore W4322006312C134306372 @default.
- W4322006312 hasConceptScore W4322006312C143050476 @default.
- W4322006312 hasConceptScore W4322006312C151730666 @default.
- W4322006312 hasConceptScore W4322006312C204330871 @default.
- W4322006312 hasConceptScore W4322006312C205649164 @default.
- W4322006312 hasConceptScore W4322006312C2780030769 @default.
- W4322006312 hasConceptScore W4322006312C33923547 @default.
- W4322006312 hasConceptScore W4322006312C58640448 @default.
- W4322006312 hasConceptScore W4322006312C6494504 @default.
- W4322006312 hasConceptScore W4322006312C77928131 @default.
- W4322006312 hasLocation W43220063121 @default.
- W4322006312 hasLocation W43220063122 @default.
- W4322006312 hasOpenAccess W4322006312 @default.
- W4322006312 hasPrimaryLocation W43220063121 @default.
- W4322006312 hasRelatedWork W1904707052 @default.
- W4322006312 hasRelatedWork W1978330345 @default.
- W4322006312 hasRelatedWork W1989137276 @default.
- W4322006312 hasRelatedWork W2050063417 @default.
- W4322006312 hasRelatedWork W2104696163 @default.
- W4322006312 hasRelatedWork W2314412274 @default.
- W4322006312 hasRelatedWork W2325222095 @default.
- W4322006312 hasRelatedWork W2364628099 @default.
- W4322006312 hasRelatedWork W2886254431 @default.
- W4322006312 hasRelatedWork W3084163497 @default.
- W4322006312 isParatext "false" @default.
- W4322006312 isRetracted "false" @default.
- W4322006312 workType "article" @default.