Relationships Between Seismic Wave-Speed, Density, and Electrical Conductivity Beneath Australia from Seismology, Mineralogy, and Laboratory-Based Conductivity Profiles

2015 ◽  
pp. 145-171 ◽  
Author(s):  
A. Khan ◽  
S. Koch ◽  
T. J. Shankland ◽  
A. Zunino ◽  
J. A. D. Connolly
Keyword(s):  
Electrical Conductivity ◽  
Seismic Wave ◽  
Wave Speed

scholarly journals The influence of microstructure on seismic wave speed anisotropy in the crust: computational analysis of quartz-muscovite rocks

2011 ◽  
Vol 185 (2) ◽  
pp. 609-621 ◽  
Author(s):  
Félice M. J. Naus-Thijssen ◽  
Andrew J. Goupee ◽  
Senthil S. Vel ◽  
Scott E. Johnson
Keyword(s):  
Seismic Wave ◽  
Wave Speed ◽  
Computational Analysis

scholarly journals Improving temporal resolution in ambient noise monitoring of seismic wave speed

2011 ◽  
Vol 116 (B7) ◽  
Author(s):  
C. Hadziioannou ◽  
E. Larose ◽  
A. Baig ◽  
P. Roux ◽  
M. Campillo
Keyword(s):  
Temporal Resolution ◽  
Seismic Wave ◽  
Ambient Noise ◽  
Wave Speed

scholarly journals Inferring the thermomechanical state of the lithosphere using geophysical and geochemical observables

2021 ◽  
Author(s):  
◽  
William J. Shinevar
Keyword(s):  
Seismic Wave ◽  
Wave Speed ◽  
Bulk Composition ◽  
Normal Faults ◽  
Compositional Variation ◽  
Total Variability ◽  
Forward Calculation ◽  
Composition I ◽  
Relationship Of ◽  
Lower Crustal

This thesis focuses on interpreting geophysical and geochemical observables in terms of the thermomechanical state of the lithosphere. In Chapter 1, I correlate lower crustal rheology with seismic wave speed. Compositional variation is required to explain half of the total variability in predicted lower crustal stress, implying that constraining regional lithology is important for lower crustal geodynamics. In Chapter 2, I utilize thermobarometry, diffusion models, and thermodynamic modelling to constrain the ultra-high formation conditions and cooling rates of the Gore Mountain Garnet Amphibolite in order to understand the rheology of the lower crust during orogenic collapse. In Chapter 3, I interpret geophysical data along a 74 Myr transect in the Atlantic to the temporal variability and relationship of crustal thickness and normal faults. In Chapter 4, I constrain the error present in the forward-calculation of seismic wave speed from ultramafic bulk composition. I also present a database and toolbox to interpret seismic wave speeds in terms of temperature and composition. Finally, in Chapter 5 I apply the methodology from Chapter 4 to interpret a new seismic tomographic model in terms of temperature, density, and composition in order to show that the shallow lithospheric roots are density unstable.

Seismic wave speed structure of the Ontong Java Plateau

2015 ◽  
Vol 420 ◽  
pp. 140-150 ◽  
Author(s):  
Brian M. Covellone ◽  
Brian Savage ◽  
Yang Shen
Keyword(s):  
Seismic Wave ◽  
Wave Speed ◽  
Ontong Java Plateau

Variations in Seismic Wave Speed and V P / V S Ratio in the North American Lithosphere

2020 ◽  
Vol 125 (12) ◽  
Author(s):  
Eva M. Golos ◽  
Hongjian Fang ◽  
Robert D. Hilst
Keyword(s):  
Seismic Wave ◽  
North American ◽  
Wave Speed ◽  
The North

scholarly journals Seismic waves in the asteroid environment

2021 ◽  
Vol 249 ◽  
pp. 13001
Author(s):  
Paul Sánchez ◽  
Daniel J. Scheeres
Keyword(s):  
Numerical Simulations ◽  
Seismic Wave ◽  
Granular Media ◽  
Wave Speed ◽  
Seismic Waves ◽  
Wave Transmission ◽  
Overburden Pressure ◽  
Wave Speeds ◽  
The Impact ◽  
Random Packings

Through numerical simulations, we investigate impact generated seismic wave transmission in granular media under extremely low pressure. This mimics the conditions in the interior of asteroids and other small planetary bodies. We find a dependency not only on the overburden pressure on the medium, but also on the velocity of the impact that generates the wave. This is, at extremely low values of overburden pressure, the wave speed depends no only on the imposed pressure, but also on the increment in pressure created by the passing of the wave. We study crystalline and random packings and find very similar behaviour though with different wave speeds as expected. We then relate our results to different mission-related events on asteroids.

Sign in / Sign up

Export Citation Format

Share Document