Amr El‐Sharkawy
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View article: Alpine Crust and Mantle Structure From 3D Monte Carlo Surface‐ and Body‐Wave Tomography
Alpine Crust and Mantle Structure From 3D Monte Carlo Surface‐ and Body‐Wave Tomography Open
An ongoing controversy revolves around the detailed structure of the subducting European and Adriatic plates under the Alps and the adjacent orogens. Mostly based on P‐wave travel time tomographic images, slab break‐off at different times,…
View article: Crustal and upper mantle 3-D <i>Vs</i> structure of the Pannonian region from joint earthquake and ambient noise Rayleigh wave tomography
Crustal and upper mantle 3-D <i>Vs</i> structure of the Pannonian region from joint earthquake and ambient noise Rayleigh wave tomography Open
SUMMARY The Pannonian Basin, situated in Central Europe, is surrounded by the Alpine, Carpathian and Dinaric orogens. To understand its tectonic characteristics and evolution, we determine a shear wave velocity model of its crust, mantle l…
View article: Cenozoic Volcanic Provinces and Shallow Asthenospheric Volumes in the Circum‐Mediterranean: Evidence From Magmatic Geochemistry, Seismic Tomography, and Integrated Geophysical‐Petrological Thermochemical Inversion
Cenozoic Volcanic Provinces and Shallow Asthenospheric Volumes in the Circum‐Mediterranean: Evidence From Magmatic Geochemistry, Seismic Tomography, and Integrated Geophysical‐Petrological Thermochemical Inversion Open
We compile an extensive catalog comprising geochemistry and ages of Cenozoic volcanic provinces in the Mediterranean region, distinguishing between three groups according to the geochemistry of magmatic rocks: intraplate (IVP), subduction‐…
View article: Imaging the Crust and Upper Mantle in the Southern Central Mediterranean with Joint Ambient Noise and Earthquake Surface Wave Tomography
Imaging the Crust and Upper Mantle in the Southern Central Mediterranean with Joint Ambient Noise and Earthquake Surface Wave Tomography Open
Surface wave tomography has proven to be a very powerful tool for discerning complex crustal and upper mantle structures since it bypasses the necessity for local seismic sources and crustal corrections. This study presents a refined 3D mo…
View article: Ambient Noise and Earthquake Surface Wave Phase Velocity Tomography of the South American Lithosphere
Ambient Noise and Earthquake Surface Wave Phase Velocity Tomography of the South American Lithosphere Open
The development of new automated techniques to measure earthquake-based interstation phase velocities allows for more detailed imaging of the South American Lithosphere. We calculated Rayleigh-wave phase velocities using the earthquake rec…
View article: Rayleigh phase velocity maps for central Europe including the Eifel volcanic province
Rayleigh phase velocity maps for central Europe including the Eifel volcanic province Open
High-resolution Rayleigh phase velocity maps can help to improve our understanding of the 3-D vs anisotropic structure of the lithosphere of central Europe and its relationship to surface tectonics and volcanism.Using seismic broad-band re…
View article: Shallow Asthenospheric Volumes Beneath Cenozoic Volcanic Provinces in the Circum-Mediterranean: Evidence From Seismic Tomography And Integrated Geophysical-Petrological Thermochemical Modelling
Shallow Asthenospheric Volumes Beneath Cenozoic Volcanic Provinces in the Circum-Mediterranean: Evidence From Seismic Tomography And Integrated Geophysical-Petrological Thermochemical Modelling Open
During the Cenozoic, the Circum-Mediterranean has experienced extensive and widespread igneous magmatism (i.e. intraplate, subduction-related and mixed-origin) that reflects the response of the upper mantle to the geodynamic evolution of t…
View article: Lithospheric evolution of eastern Arabia
Lithospheric evolution of eastern Arabia Open
The geology of eastern Arabia is dominated by a vast cover of mostly Phanerozoic sedimentary rocks and little was known about the architecture of the middle and lower crust. On the easternmost margin, obduction of the Semail Ophiolite duri…
View article: A 3-D crustal shear wave velocity model and Moho map below the Semail Ophiolite, eastern Arabia
A 3-D crustal shear wave velocity model and Moho map below the Semail Ophiolite, eastern Arabia Open
SUMMARY The Semail Ophiolite in eastern Arabia is the largest and best-exposed slice of oceanic lithosphere on land. Detailed knowledge of the tectonic evolution of the shallow crust, in particular during and after ophiolite obduction in L…
View article: Crustal and upper mantle 3D Vs structure of the Pannonian Region from joint earthquake and ambient noise Rayleigh wave tomography
Crustal and upper mantle 3D Vs structure of the Pannonian Region from joint earthquake and ambient noise Rayleigh wave tomography Open
<p>The Pannonian basin is a continental back-arc basin in Central Europe, surrounded by the Alpine, Carpathian, and Dinaric mountain ranges. To better understand this area's tectonic affinity and evolution, a high-resolution model of…
View article: Spatial Correlation between Intraplate Volcanism and Thin Lithosphere in the Circum-Mediterranean: New Evidences from Surface Wave Tomography and Thermomechanical Modelling
Spatial Correlation between Intraplate Volcanism and Thin Lithosphere in the Circum-Mediterranean: New Evidences from Surface Wave Tomography and Thermomechanical Modelling Open
<p>During the Cenozoic, the Circum-Mediterranean and its periphery have experienced extensive and widespread anorogenic igneous magmatism that reflects the response of the upper mantle to the geodynamic evolution of this area. The ex…
View article: Surface‐Wave Tomography of the Central‐Western Mediterranean: New Insights Into the Liguro‐Provençal and Tyrrhenian Basins
Surface‐Wave Tomography of the Central‐Western Mediterranean: New Insights Into the Liguro‐Provençal and Tyrrhenian Basins Open
The complex tectonic setting of the central‐western Mediterranean has interested geoscientists for decades, but its geodynamic evolution remains a matter of debate. We rely on 807 seismometers from southern Europe and northern Africa to me…
View article: Gravity effect of Alpine slab segments based on geophysical and petrological modelling
Gravity effect of Alpine slab segments based on geophysical and petrological modelling Open
In this study, we present an estimate of the gravity signal of the slabs beneath the Alpine mountain belt. Estimates of the gravity effect of the subducting slabs are often omitted or simplified in crustal-scale models. The related signal …
View article: Architecture of the crust and lithosphere beneath the Semail Ophiolite from ambient noise tomography and receiver functions: insights on the tectonic evolution of eastern Arabia
Architecture of the crust and lithosphere beneath the Semail Ophiolite from ambient noise tomography and receiver functions: insights on the tectonic evolution of eastern Arabia Open
<p>The Semail Ophiolite is the world<span>‘</span>s largest and best exposed oceanic lithosphere on land and a primary reference site for studies of creation of oceanic lithosphere, initiation of subduction, geo…
View article: Permo-Triassic Oceanic and Adjacent Continental Lithosphere in the Eastern Mediterranean, from surface-wave and wide-angle imaging
Permo-Triassic Oceanic and Adjacent Continental Lithosphere in the Eastern Mediterranean, from surface-wave and wide-angle imaging Open
<p>The Earth’s oldest oceanic lithosphere preserved in-situ is in the eastern Mediterranean Sea. It can offer essential information on the oceanic plate evolution. Yet, its thickness and other properties have been difficult…
View article: Crustal and upper mantle velocity structure of the Pannonian Region using Rayleigh wave ambient noise tomography
Crustal and upper mantle velocity structure of the Pannonian Region using Rayleigh wave ambient noise tomography Open
<p>The Pannonian Basin is located in Central-Europe surrounded by the Alpine, Carpathian, and Dinarides mountain ranges. This is a back-arc basin characterized by shallow Moho depth, updoming mantle and high heat flow. In this study,…
View article: Review of &amp;#8220;Transversely Isotropic Lower Crust of Variscan Central Europe imaged by Ambient Noise Tomography of the Bohemian Massif&amp;#8221; by Ji&amp;#345;&amp;#237; Kvapil et al.,
Review of &#8220;Transversely Isotropic Lower Crust of Variscan Central Europe imaged by Ambient Noise Tomography of the Bohemian Massif&#8221; by Ji&#345;&#237; Kvapil et al., Open
The authors conducted an ambient noise tomographic study for imaging the crust of the Bohemian Massif, central Europe.A new high resolution 3-D shear-wave crustal structure, constrained by about 21,066 Rayleigh wave group velocity dispersi…
View article: Gravity Effect of Alpine Slab Segments Based on Geophysical and Petrological Modelling
Gravity Effect of Alpine Slab Segments Based on Geophysical and Petrological Modelling Open
We study the potential gravity effect of suggested slab configurations beneath the Alpine mountain belt. The opposing slab configurations are based on seismic crustal thickness estimates and high-resolution upper mantle tomographies. Direc…
View article: The Slab Puzzle of the Alpine‐Mediterranean Region: Insights From a New, High‐Resolution, Shear Wave Velocity Model of the Upper Mantle
The Slab Puzzle of the Alpine‐Mediterranean Region: Insights From a New, High‐Resolution, Shear Wave Velocity Model of the Upper Mantle Open
Mediterranean tectonics since the Lower Cretaceous has been characterized by a multiphase subduction and collision history with temporally and spatially variable, small‐scale plate configurations. A new shear wave velocity model of the Med…
View article: The Alpine Deep Structure from Surface Wave Tomography
The Alpine Deep Structure from Surface Wave Tomography Open
<p>Collisional tectonics of the Alps is driven by several slab segments. A detailed imaging of the lithosphere-asthenosphere system beneath the Alps is, however, challenging due to the relatively small size of the slab segments and t…
View article: A 3-D crustal model of the eastern Arabian plate margin below the Oman Ophiolite
A 3-D crustal model of the eastern Arabian plate margin below the Oman Ophiolite Open
<p>The Oman ophiolite is one of the best preserved and studied ophiolites, where oceanic lithosphere was obducted on top of a continent. It covers an area of about 700 x 140 km² but its 3D geometry, as well as the properties…
View article: Constraining the dynamics of the present-day Alps with 3D geodynamic inverse models - model version 0.2
Constraining the dynamics of the present-day Alps with 3D geodynamic inverse models - model version 0.2 Open
<div>The ongoing formation of the alpine mountain belt is a major indicator of the active geological processes in the Mediterranean that for example causes volcanism in Italy as well as considerable hazard. To understand this complex…
View article: Gravity effect of Alpine slab segments based on geophysical and petrological modelling
Gravity effect of Alpine slab segments based on geophysical and petrological modelling Open
<p>The direction and location of subducting slab segments in the Alpine area is highly debated.  Here, we use seismic crustal depth estimates and different upper mantle tomographies to define hypotheses for the geometry of t…
View article: Shallow Asthenospheric Volumes in the Circum-Mediterranean and their Relation to Intraplate Volcanism and Topography
Shallow Asthenospheric Volumes in the Circum-Mediterranean and their Relation to Intraplate Volcanism and Topography Open
<p>Based on a high-resolution Rayleigh-wave tomography of the Mediterranean region, shallow asthenospheric volumes are identified characterized by low S-wave velocities between about 70 km and 250 km depth. We distinguish between fiv…
View article: The Slab Puzzle of the Alpine-Mediterranean Region: Insights from a new, High-Resolution, Shear-Wave Velocity Model of the Upper Mantle
The Slab Puzzle of the Alpine-Mediterranean Region: Insights from a new, High-Resolution, Shear-Wave Velocity Model of the Upper Mantle Open
<p>The fascinatingly complex tectonic make-up of the Mediterranean region comprises small, strongly-curved retreating subduction zones, associated back-arc basins, and the continental collisions along the northern and eastern margins…
View article: Lithospheric structure of the Pannonian Basin using Rayleigh wave ambient noise tomography &#8211; preliminary results
Lithospheric structure of the Pannonian Basin using Rayleigh wave ambient noise tomography – preliminary results Open
<p>We used Rayleigh wave ambient noise tomography to investigate the crust and uppermost mantle structure of the Pannonian Basin. The Pannonian Basin and the surrounding orogens are located within the arcuate Alpine–Carpath…
View article: Slab break-offs in the Alpine subduction zone
Slab break-offs in the Alpine subduction zone Open
After the onset of plate collision in the Alps, at 32–34 Ma, the deep structure of the orogen is inferred to have changed dramatically: European plate break-offs in various places of the Alpine arc, as well as a possible reversal of subduc…
View article: The Slab Puzzle of the Alpine-Mediterranean Region: Insights From a New, High-Resolution, Shear Wave Velocity Model of the Upper Mantle
The Slab Puzzle of the Alpine-Mediterranean Region: Insights From a New, High-Resolution, Shear Wave Velocity Model of the Upper Mantle Open
Mediterranean tectonics since the Lower Cretaceous has been characterized by a multiphase subduction and collision history with temporally and spatially variable, small-scale plate configurations. A new shear wave velocity model of the Med…
View article: Supplementary material to &quot;Slab Break-offs in the Alpine Subduction Zone&quot;
Supplementary material to "Slab Break-offs in the Alpine Subduction Zone" Open
1. Table S1 2. Figures S1 to S121 Table S1.Main observations concerning the subduction in the eastern Alps.
View article: Slab Break-offs in the Alpine Subduction Zone
Slab Break-offs in the Alpine Subduction Zone Open
After the onset of plate collision in the Alps, at 32–34 Ma, the deep structure of the orogen is inferred to have changed dramatically: European plate break-offs in various places of the Alpine arc, as well as a possible reversal of subduc…