Impact of inherited structures on present-day tectonics of the northern Red Sea and its western onshore area in Egypt: evidence from 3D gravity inversion and seismicity

2021 ◽  
Vol 14 (13) ◽  
Author(s):  
Salah Saleh ◽  
Adel R. Moustafa ◽  
Vladimír Pohánka
Keyword(s):  
Red Sea ◽  
Gravity Inversion ◽  
3D Gravity ◽  
Northern Red Sea

Integration of gravity, magnetic, and seismic data for subsalt modeling in the Northern Red Sea

2021 ◽  
Vol 9 (2) ◽  
pp. T507-T521
Author(s):  
Camille Le Magoarou ◽  
Katja Hirsch ◽  
Clement Fleury ◽  
Remy Martin ◽  
Johana Ramirez-Bernal ◽  
...  
Keyword(s):  
Red Sea ◽  
Seismic Reflection ◽  
Magnetic Data ◽  
Gravity Inversion ◽  
Gravity And Magnetic ◽  
3D Gravity ◽  
Thin Crust ◽  
Gravity And Magnetic Data ◽  
Refraction Data ◽  
Northern Red Sea

Rifts and rifted passive margins are often associated with thick evaporite layers, which challenge seismic reflection imaging in the subsalt domain. This makes understanding the basin evolution and crustal architecture difficult. An integrative, multidisciplinary workflow has been developed using the exploration well, gravity and magnetics data, together with seismic reflection and refraction data sets to build a comprehensive 3D subsurface model of the Egyptian Red Sea. Using a 2D iterative workflow first, we have constructed cross sections using the available well penetrations and seismic refraction data as preliminary constraints. The 2D forward model uses regional gravity and magnetic data to investigate the regional crustal structure. The final models are refined using enhanced gravity and magnetic data and geologic interpretations. This process reduces uncertainties in basement interpretation and magmatic body identification. Euler depth estimates are used to point out the edges of high-susceptibility bodies. We achieved further refinement by initiating a 3D gravity inversion. The resultant 3D gravity model increases precision in crustal geometries and lateral density variations within the crust and the presalt sediments. Along the Egyptian margin, where data inputs are more robust, basement lows are observed and interpreted as basins. Basement lows correspond with thin crust ([Formula: see text]), indicating that the evolution of these basins is closely related to the thinning or necking process. In fact, the Egyptian Northern Red Sea is typified by dramatic crustal thinning or necking that is occurring over very short distances of approximately 30 km, very proximal to the present-day coastline. The integrated 2D and 3D modeling reveals the presence of high-density magnetic bodies that are located along the margin. The location of the present-day Zabargad transform fault zone is very well delineated in the computed crustal thickness maps, suggesting that it is associated with thin crust and shallow mantle.

Numerical modeling and 3D-gravity inversion of the Vargeão impact structure formed in a mixed basalt/sandstone target, Paraná Basin, Brazil

2021 ◽  
pp. 103396
Author(s):  
Laian de Moura Silva ◽  
Marcos Alberto Rodrigues Vasconcelos ◽  
Vinamra Agrawal ◽  
Alvaro Penteado Crósta ◽  
Emilson Pereira Leite
Keyword(s):  
Numerical Modeling ◽  
Gravity Inversion ◽  
Impact Structure ◽  
Paraná Basin ◽  
3D Gravity ◽  
Parana Basin

scholarly journals Subsurface modelling of Kei Kecil Island with 3D gravity inversion

2021 ◽  
Vol 1918 (2) ◽  
pp. 022033
Author(s):  
Supriyadi ◽  
E Wijanarko ◽  
Khumaedi
Keyword(s):  
Gravity Inversion ◽  
3D Gravity

3D gravity inversion and uncertainty assessment of basement relief via Particle Swarm Optimization

2017 ◽  
Vol 139 ◽  
pp. 338-350 ◽  
Author(s):  
J.L.G. Pallero ◽  
J.L. Fernández-Martínez ◽  
S. Bonvalot ◽  
O. Fudym
Keyword(s):  
Particle Swarm Optimization ◽  
Particle Swarm ◽  
Uncertainty Assessment ◽  
Gravity Inversion ◽  
Swarm Optimization ◽  
3D Gravity

scholarly journals Effects of Water Column Mixing and Stratification on Planktonic Primary Production and Dinitrogen Fixation on a Northern Red Sea Coral Reef

2018 ◽  
Vol 9 ◽  
Author(s):  
Arjen Tilstra ◽  
Nanne van Hoytema ◽  
Ulisse Cardini ◽  
Vanessa N. Bednarz ◽  
Laura Rix ◽  
...  
Keyword(s):  
Coral Reef ◽  
Primary Production ◽  
Water Column ◽  
Red Sea ◽  
Dinitrogen Fixation ◽  
Water Column Mixing ◽  
Northern Red Sea

Oceanization Starts at Depth During Continental Rupturing in the Northern Red Sea

2018 ◽  
pp. 131-157 ◽  
Author(s):  
Marco Ligi ◽  
Enrico Bonatti ◽  
William Bosworth ◽  
Sara Ronca
Keyword(s):  
Red Sea ◽  
Northern Red Sea
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