Early stage diapirism in the Red Sea deep-water evaporites: Origins and length-scales

Mitchell, Neil C.; Hernandez, Karina; Preine, Jonas; Ligi, Marco; Augustin, Nico; Izzeldin, A.Y.; Hübscher, Christian

doi:10.1016/j.tecto.2022.229331

Cited by 6 publications

(2 citation statements)

References 124 publications

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“…To overcome the uncertainties due to these limitations associated with global grids, we compiled the available seismic sediment thickness data (Ali & Watts, 2013; Cochran, 1983; Davies & Tramontini, 1970; Delaunay et al., 2023; Drake & Girdler, 1964; Egloff et al., 1991; Fairhead, 1973, Gettings et al., 1986; Girdler et al., 1980; Girdler & Whitmarsh, 1974; Izzeldin, 1987; Laughton & Tramontini, 1970; Ligi et al., 2012, 2015; Lowell & Genik, 1972; Maguire et al., 2003, 2006; Makris & Ginzburg, 1987; Martinez & Cochran, 1988; Mechie & Prodehl, 1988; Mitchell et al., 2022; Mooney et al., 1985; Nawab, 1984; Okwokwo et al., 2022; Prodehl et al., 1997; Rihm et al., 1991; Ross & Schlee, 1977; Shi et al., 2018; Skipwith, 1973) and incorporated into the grids extracted from GlobSed and CRUST1.0 to prepare an improved sediment thickness map of the region (Figure 1c). The computational process consisted of several key steps.…”

Section: Methodsmentioning

confidence: 99%

Influence of Lateral Plume Channel on the Evolution of Rift Arms of the Afar Triple Junction: Constraints From 3‐D Gravity Interpretation

Sreenidhi,

Betts,

Radhakrishna

et al. 2023

JGR Solid Earth

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The Afar region presents a unique example of a juvenile R‐R‐R triple junction with the arms evolved to various stages of maturity. The lithosphere in this area has been modified heterogeneously by the nearby Afar mantle plume. To gain a comprehensive and consistent understanding of the link between crustal geometry and geodynamics of the region and facilitate comparisons across different tectonic elements, we developed a high‐resolution crustal thickness map of the region that resolves major tectonic features. The calculation involved a well‐constrained 3‐D inversion of upper mantle‐corrected crustal Bouguer gravity anomalies computed with the help of tomography‐derived densities. Our results match earlier localized crustal thickness estimates, illustrating the method's efficacy. A thinner crust (∼20–26 km) is revealed in the Afar compared to adjacent continental regions. The Main Ethiopian Rift has the thickest crust in the central part of the rift (∼38–40 km) and thinner to the north (∼30 km) and south (∼35 km). The crustal thickness along the Gulf of Aden changes from east (∼5 km) to west (∼17 km) in the west, consistent with a westward transition from seafloor spreading to continental rifting. The southern Red Sea is characterized by asymmetric crustal thickness, with a thicker crust (∼17 km) on the eastern flank compared to the western flank (∼11 km), which we attribute to the influence of a sub‐lithospheric channel from the Afar mantle plume. We propose a model describing the channel leading to asymmetric features of the southern Red Sea, such as crustal accretion, marginal topography, and volcanism.

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Section: Methodsmentioning

confidence: 99%

Influence of Lateral Plume Channel on the Evolution of Rift Arms of the Afar Triple Junction: Constraints From 3‐D Gravity Interpretation

Sreenidhi,

Betts,

Radhakrishna

et al. 2023

JGR Solid Earth

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“…STS2, Decarlis et al 2015). At the end of the Miocene, the evaporite level was below the range of the global sea level (−132 m air-loaded or −192 m water-loaded), suggesting that the Red Sea rifted margin was under-filled and in a shallow water condition where the water level was unstable and decreased during the deposition of the Upper Miocene Zeit Formation (Mitchell et al 2021(Mitchell et al , 2022. The erosion of the Upper Miocene layered evaporites correlated to an abrupt short-lived drawdown of the Red Sea level during the latest Miocene or the earliest Pliocene (Mitchell et al 2021).…”

Section: Rifting Modelmentioning

confidence: 99%

Red Sea rifting in central Egypt: constraints from the offshore Quseir province

Ali

Decarlis

Ligi

et al. 2023

JGS

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Southern and Central Red Sea oceanic crust formation is generally accepted to have started ∼5 Ma. However, the nature of the crust in the Northern Red Sea (NRS) is still debated. This paper describes the rift architecture, dynamics and evolution of the NRS and identifies domains that relate to first-order geodynamic processes. The proximal margin domain is located onshore and is characterized by latest Oligocene-Miocene half-graben basins. New seismic interpretations show that the offshore region is a necking domain dominated by low angle, high offset extensional faults, which led to the exhumation of lower crustal gabbros at Brothers Islands. 2D forward models suggest that necking passes into a distal margin domain, where the continental crust thins to < 10 km at 120 km from the coast. Sensitivity testing of interpretations for the distal domain indicates a probable scenario where exhumed lower continental crust or serpentinized mantle is present. A comprehensive rift model for the NRS in the Quseir sector accounts for circa 25 Ma magmatic underplating accompanied by half-graben development, followed by Early Miocene crustal thinning accommodated by an east-dipping detachment fault, and a Late Miocene phase with a flip of the detachment geometry, that led to the present-day configuration.

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Salt tectonics synchronous with salt deposition in the Santos Basin (Ariri Formation, Brazil)

Célini,

Pichat,

Ringenbach

2024

Earth and Planetary Science Letters

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Early stage diapirism in the Red Sea deep-water evaporites: Origins and length-scales

Cited by 6 publications

References 124 publications

Influence of Lateral Plume Channel on the Evolution of Rift Arms of the Afar Triple Junction: Constraints From 3‐D Gravity Interpretation

Influence of Lateral Plume Channel on the Evolution of Rift Arms of the Afar Triple Junction: Constraints From 3‐D Gravity Interpretation

Red Sea rifting in central Egypt: constraints from the offshore Quseir province

Salt tectonics synchronous with salt deposition in the Santos Basin (Ariri Formation, Brazil)

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