scholarly journals Shear wave velocities in the Pampean flat-slab region from Rayleigh wave tomography: Implications for slab and upper mantle hydration

2012 ◽  
Vol 117 (B11) ◽  
pp. n/a-n/a ◽  
Author(s):  
Ryan Porter ◽  
Hersh Gilbert ◽  
George Zandt ◽  
Susan Beck ◽  
Linda Warren ◽  
...  
Keyword(s):  
Rayleigh Wave ◽  
Shear Wave ◽  
Upper Mantle ◽  
Flat Slab ◽  
Wave Velocities ◽  
Shear Wave Velocities ◽  
Wave Tomography ◽  
Rayleigh Wave Tomography

scholarly journals The structure of the lithosphere and upper mantle beneath the Eastern Mediterranean and Middle East

2020 ◽  
Vol 2 (3) ◽  
pp. 311-326 ◽  
Author(s):  
Dan McKenzie
Keyword(s):  
Middle East ◽  
Shear Wave ◽  
Upper Mantle ◽  
Eastern Mediterranean ◽  
Three Dimensional ◽  
Surface Velocity ◽  
Wave Velocities ◽  
Shear Wave Velocities ◽  
Surface Measurements ◽  
Lithosphere Thickness

AbstractSurface velocity measurements show that the Middle East is one of the most actively deforming regions of the continents. The structure of the underlying lithosphere and convecting upper mantle can be explored by combining three types of measurement. The gravity field from satellite and surface measurements is supported by the elastic properties of the lithosphere and by the underlying mantle convection. Three dimensional shear wave velocities can be determined by tomographic inversion of surface wave velocities. The shear wave velocities of the mantle are principally controlled by temperature, rather than by composition. The mantle composition can be obtained from that of young magmas. Application of these three types of observation to the Eastern Mediterranean and Middle East shows that the lithosphere thickness in most parts is no more than 50-70 km, and that the elastic thickness is less than 5 km. Because the lithosphere is so thin and weak the pattern of the underlying convection is clearly visible in the topography and gravity, as well as controlling the volcanism. The convection pattern takes the form of spokes: lines of hot upwelling mantle, joining hubs where the upwelling is three dimensional. It is the same as that seen in high Rayleigh number laboratory and numerical experiments. The lithospheric thicknesses beneath the seafloor to the SW of the Hellenic Arc and beneath the NE part of the Arabian Shield are more than 150 km and the elastic thicknesses are 30–40 km.

scholarly journals A first detailed look at the Greenland lithosphere and upper mantle, using Rayleigh wave tomography

2004 ◽  
Vol 158 (1) ◽  
pp. 267-286 ◽  
Author(s):  
Fiona A. Darbyshire ◽  
Tine B. Larsen ◽  
Klaus Mosegaard ◽  
Trine Dahl-Jensen ◽  
Ólafur Gudmundsson ◽  
...  
Keyword(s):  
Rayleigh Wave ◽  
Upper Mantle ◽  
Wave Tomography ◽  
Rayleigh Wave Tomography

Crustal and upper mantle structure of South China from Rayleigh wave tomography

2016 ◽  
pp. ggw477
Author(s):  
B. Shan ◽  
X. Xiong ◽  
K. F. Zhao ◽  
Z. J. Xie ◽  
Y. Zheng ◽  
...  
Keyword(s):  
Rayleigh Wave ◽  
South China ◽  
Upper Mantle ◽  
Mantle Structure ◽  
Upper Mantle Structure ◽  
Wave Tomography ◽  
Rayleigh Wave Tomography

scholarly journals Shear wave velocities in the upper mantle of the Western Alps: new constraints using array analysis of seismic surface waves

2017 ◽  
Vol 210 (1) ◽  
pp. 321-331 ◽  
Author(s):  
Chao Lyu ◽  
Helle A. Pedersen ◽  
Anne Paul ◽  
Liang Zhao ◽  
Stefano Solarino ◽  
...  
Keyword(s):  
Surface Waves ◽  
Shear Wave ◽  
Upper Mantle ◽  
Western Alps ◽  
Array Analysis ◽  
Wave Velocities ◽  
Shear Wave Velocities ◽  
Seismic Surface Waves
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