Compressional and Shear Wave Velocities of Volcanic Rocks and Glasses to 900°C at 20 Kbar

1979 ◽  
pp. 1248-1254
Author(s):  
S. Matsushima
Keyword(s):  
Shear Wave ◽  
Volcanic Rocks ◽  
Wave Velocities ◽  
Shear Wave Velocities

Using Volcanic Geochemistry and Seismic Tomography to Refine Global Models of Mantle Temperature and Plate Thickness

2021 ◽  
Author(s):  
Patrick Ball ◽  
Nicky White ◽  
John Maclennan ◽  
Simon Stephenson
Keyword(s):  
Volcanic Rock ◽  
Shear Wave ◽  
Plate Thickness ◽  
Volcanic Rocks ◽  
Seismic Velocities ◽  
Intraplate Volcanism ◽  
Lithospheric Thickness ◽  
Wave Velocities ◽  
Shear Wave Velocities ◽  
Mantle Temperature

<p>The thermochemical structure of lithospheric and asthenospheric mantle exert primary controls on surface topography and volcanic activity. Volcanic rock compositions and mantle seismic velocities provide indirect observations of this structure. Here, we compile and analyze a global database of the distribution and composition of Neogene-Quaternary intraplate volcanic rocks. By integrating this database with seismic tomographic models, we show that intraplate volcanism is concentrated in regions characterized by slow upper mantle shear-wave velocities and by thin lithosphere (i.e. < 100 km). We observe a negative correlation between shear-wave velocities at depths of 125-175 km and melt fractions inferred from volcanic rock compositions. Furthermore, mantle temperature and lithospheric thickness estimates obtained by geochemical modeling broadly agree with values determined from tomographic models that have been converted into temperature. Intraplate volcanism often occurs in regions where uplifted (but undeformed) marine sedimentary rocks are exposed. Regional elevation of these rocks can be generated by a combination of hotter asthenosphere and lithospheric thinning. Therefore, the distribution and composition of intraplate volcanic rocks through geologic time will help to probe past mantle conditions and surface processes.</p>

scholarly journals Global influence of mantle temperature and plate thickness on intraplate volcanism

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
P. W. Ball ◽  
N. J. White ◽  
J. Maclennan ◽  
S. N. Stephenson
Keyword(s):  
Volcanic Rock ◽  
Shear Wave ◽  
Plate Thickness ◽  
Volcanic Rocks ◽  
Seismic Velocities ◽  
Intraplate Volcanism ◽  
Lithospheric Thickness ◽  
Wave Velocities ◽  
Shear Wave Velocities ◽  
Mantle Temperature

AbstractThe thermochemical structure of lithospheric and asthenospheric mantle exert primary controls on surface topography and volcanic activity. Volcanic rock compositions and mantle seismic velocities provide indirect observations of this structure. Here, we compile and analyze a global database of the distribution and composition of Neogene-Quaternary intraplate volcanic rocks. By integrating this database with seismic tomographic models, we show that intraplate volcanism is concentrated in regions characterized by slow upper mantle shear-wave velocities and by thin lithosphere (i.e. <100 km). We observe a negative correlation between shear-wave velocities at depths of 125–175 km and melt fractions inferred from volcanic rock compositions. Furthermore, mantle temperature and lithospheric thickness estimates obtained by geochemical modeling broadly agree with values determined from tomographic models that have been converted into temperature. Intraplate volcanism often occurs in regions where uplifted (but undeformed) marine sedimentary rocks are exposed. Regional elevation of these rocks can be generated by a combination of hotter asthenosphere and lithospheric thinning. Therefore, the distribution and composition of intraplate volcanic rocks through geologic time will help to probe past mantle conditions and surface processes.

Soil moisture assessment by means of compressional and shear wave velocities: Theoretical analysis and experimental setup

Measurement ◽  
2010 ◽  
Vol 43 (3) ◽  
pp. 344-352 ◽  
Author(s):  
F. Adamo ◽  
F. Attivissimo ◽  
L. Fabbiano ◽  
N. Giaquinto ◽  
M. Spadavecchia
Keyword(s):  
Soil Moisture ◽  
Theoretical Analysis ◽  
Shear Wave ◽  
Experimental Setup ◽  
Wave Velocities ◽  
Shear Wave Velocities

Comparison of shear wave velocities on ultrasound elastography between different machines, transducers, and acquisition depths: a phantom study

2016 ◽  
Vol 26 (10) ◽  
pp. 3361-3367 ◽  
Author(s):  
Hyun Joo Shin ◽  
Myung-Joon Kim ◽  
Ha Yan Kim ◽  
Yun Ho Roh ◽  
Mi-Jung Lee
Keyword(s):  
Shear Wave ◽  
Phantom Study ◽  
Ultrasound Elastography ◽  
Wave Velocities ◽  
Shear Wave Velocities
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