Basement Structural Trends in Egypt as Obtained from Geopotential Data

Riad, S.; El-Etr, Hassan A.

doi:10.1007/978-94-017-0831-9_49

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“…There is a strong positive gravity anomaly in the southeastern part of the study area, Frontiers in Earth Science frontiersin.org up to southern Egypt, and in some northeasterly-extended areas in northeastern Libya and northwest Egypt (Figure 3). According to Riad et al (1983), higher gravity anomalies can only be juxtaposed with low gravity anomaly features and vice versa along zones of high gravity gradients if shear movements are acting on previously faulted formations.…”

Section: Extraction Of the High-pass Filtered Gravity Mapmentioning

confidence: 99%

“…Red box shows studies in Figure 17A. Maamoun, 1979;Maamoun et al, 1984;Ben-Menahem, 1979;Riad et al, 1983 and(Woodward-Clyde, 1985).…”

Section: Figure 16mentioning

confidence: 99%

“…(PMS = PMS as detected from this study, Thin lines = shear faults detected from gravity). (Compiled by Gamal, 2013 from,Maamoun, 1979;Maamoun et al, 1984; Ben-Menahem, 1979;Riad et al, 1983 and(Woodward-Clyde, 1985).…”

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confidence: 99%

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Sedimentary cover and structural trends affecting the groundwater flow in the Nubian Sandstone Aquifer System: Inferences from geophysical, field and geochemical data

2023

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This study combined gravity data from the Earth Gravitational Model (EGM2008) with other data to better understand the spatial variations of the sedimentary cover and the structural trends that affect groundwater flow in the Nubian Sandstone Aquifer System. Our findings were verified and evidenced by geological, geochronological, geochemical data, and earthquake records: 1) The Uweinat-Aswan basement uplift, which runs east-west, partially isolates the Dakhla subbasin from the shallower northern Sudan subbasin, and thereby impeding the south-to-north groundwater flow from northern Sudan platform to the Dakhla subbasin; 2) A thickening of the sedimentary cover in the NE-SW direction from the southern Kufra through the northern Kufra to the Dakhla subbasin; 3) The sedimentary cover was found to increase from less than 500 m in the south (Northern Sudan and Uweinat region) to more than 6 km in the north (Mediterranean coast); 4) A number of structural trends (NE-SW, N-S, E-W, and NW-SE) affecting the region; 5) A large Pelusium megashear system that runs northeast to southwest makes it easier for groundwater to flow from the Kufra subbasin to the Dakhla subbasin; 6) Along the paths that groundwater takes, like from Siwa to Qattara and from northwest Farafra to north Bahariya, and along structures that run in the same direction as the flow, a progressive increase in 36Cl groundwater ages were observed; 7) It is a better way to learn about the hydrogeological context of large aquifers and figure out how to best manage these underground water sources.

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Section: Extraction Of the High-pass Filtered Gravity Mapmentioning

confidence: 99%

“…Red box shows studies in Figure 17A. Maamoun, 1979;Maamoun et al, 1984;Ben-Menahem, 1979;Riad et al, 1983 and(Woodward-Clyde, 1985).…”

Section: Figure 16mentioning

confidence: 99%