© Terra Antartica Publication
... margin offshore from Queen Mary Land, East Antarctica, allow a regional interpretation of the geology and tectonic history of this sector of the Antarctic margin. The margin formed mainly in the Cretaceous, adjacent to the pre-breakup triple junction that developed between Greater India, Australia a ...
... margin offshore from Queen Mary Land, East Antarctica, allow a regional interpretation of the geology and tectonic history of this sector of the Antarctic margin. The margin formed mainly in the Cretaceous, adjacent to the pre-breakup triple junction that developed between Greater India, Australia a ...
2. Geophysics and the Structure of the Lesser Antilles Forearc
... eastern boundary of the Caribbean Plate, where Atlantic oceanic lithosphere of the North and South American plates passes beneath it. The predominantly easterly direction of plate convergence at the boundary has been inferred primarily from the northern boundary of the Caribbean Plate (Jordan, 1975; ...
... eastern boundary of the Caribbean Plate, where Atlantic oceanic lithosphere of the North and South American plates passes beneath it. The predominantly easterly direction of plate convergence at the boundary has been inferred primarily from the northern boundary of the Caribbean Plate (Jordan, 1975; ...
Mantle deformation beneath the Chicxulub impact crater
... lower crustal material (Christeson et al., 2001; Morgan et al., 2002). This central uplift is offset ...
... lower crustal material (Christeson et al., 2001; Morgan et al., 2002). This central uplift is offset ...
Factors controlling elastic properties in carbonate sediments and rocks
... Cementation can transform carbonate sediment within months into a rock. These shallow subsurface cementation processes add stiffness to the young rocks, which results in a significant increase in velocity that is much greater than the velocity increase due to compaction. Figure 3 illustrates this ph ...
... Cementation can transform carbonate sediment within months into a rock. These shallow subsurface cementation processes add stiffness to the young rocks, which results in a significant increase in velocity that is much greater than the velocity increase due to compaction. Figure 3 illustrates this ph ...
Probability of radial anisotropy in the deep mantle Earth and
... non-linear model space search approach. We use Rayleigh wave phase velocity maps for the fundamental and up to the sixth higher mode and Love wave phase velocity maps for the fundamental and up to the fifth higher mode. This provides us with a large dataset of higher modes, especially in comparison w ...
... non-linear model space search approach. We use Rayleigh wave phase velocity maps for the fundamental and up to the sixth higher mode and Love wave phase velocity maps for the fundamental and up to the fifth higher mode. This provides us with a large dataset of higher modes, especially in comparison w ...
S-Velocity Structure of the Upper Mantle
... Knowledge of the velocity structure of the crust and upper mantle can improve source studies and aid investigations into mantle dynamics. Using an initial data set of single-station phase measurements of surface waves recorded on the USArray Transportable Array, we investigate the phase-velocity str ...
... Knowledge of the velocity structure of the crust and upper mantle can improve source studies and aid investigations into mantle dynamics. Using an initial data set of single-station phase measurements of surface waves recorded on the USArray Transportable Array, we investigate the phase-velocity str ...
Elastic Wave Propagation in Anisotropic Media: Migration
... primary benefits of this technique are: 1) it allows for fast traveltime computation; 2) it makes possible an extremely rapid estimation of the interval elastic parameters; and 3) it provides physical insight into wave propagation in anisotropic media. Based on the forward modeling discussed above, ...
... primary benefits of this technique are: 1) it allows for fast traveltime computation; 2) it makes possible an extremely rapid estimation of the interval elastic parameters; and 3) it provides physical insight into wave propagation in anisotropic media. Based on the forward modeling discussed above, ...
Seismic refraction evidence for steep faults cutting highly
... faults. Each of these faults is known to cut basement and to juxtapose fundamentally different rock types at the surface of the Earth. The 2-D structure model places constraints on the geometry of these and other recognized faults at depth, as well as on the pre-existing ...
... faults. Each of these faults is known to cut basement and to juxtapose fundamentally different rock types at the surface of the Earth. The 2-D structure model places constraints on the geometry of these and other recognized faults at depth, as well as on the pre-existing ...
Distributed deformation in the lower crust and upper mantle beneath
... Converted phases from teleseisms recorded by a seismic array spanning the northern half of the Marlborough fault system, South Island, New Zealand, show a continuous unbroken Moho underlying a seismically anisotropic lower crust beneath the two northernmost faults of the fault system. These observat ...
... Converted phases from teleseisms recorded by a seismic array spanning the northern half of the Marlborough fault system, South Island, New Zealand, show a continuous unbroken Moho underlying a seismically anisotropic lower crust beneath the two northernmost faults of the fault system. These observat ...
Crust and Upper Mantle Velocity Structure of the Yellowstone Hot
... [12] 2. Use (1) as a starting model, and invert observations for mean phase velocity in each of the three tectonic regions: Basin and Range (BR), Wyoming Craton (WY), and Yellowstone hot spot track (YHT) (Figure 1). [13] 3. Use (2) as a starting model and invert data for twodimensional phase velocit ...
... [12] 2. Use (1) as a starting model, and invert observations for mean phase velocity in each of the three tectonic regions: Basin and Range (BR), Wyoming Craton (WY), and Yellowstone hot spot track (YHT) (Figure 1). [13] 3. Use (2) as a starting model and invert data for twodimensional phase velocit ...
Crustal flow pattern beneath the Tibetan Plateau constrained by
... series in an equal-length window as the Lg phase before the firstarriving P wave. Then, we calculated Fourier spectra for both the Lg-wave and the noise, sampled the spectral amplitudes, and corrected for the noise effects. As an example, Fig. 2 illustrates this process for event 2004/08/26 at statio ...
... series in an equal-length window as the Lg phase before the firstarriving P wave. Then, we calculated Fourier spectra for both the Lg-wave and the noise, sampled the spectral amplitudes, and corrected for the noise effects. As an example, Fig. 2 illustrates this process for event 2004/08/26 at statio ...
Precise hypocenter locations of midcrustal low-frequency earthquakes beneath Mt. Fuji, Japan
... The resulting distribution of hypocenters of the MLFs (Fig. 3) has several striking features. Hypocenters of the MLFs occupy an ellipsoidal volume roughly 5 km in diameter with its center offset 3 km to the northeast of the summit of Mt. Fuji. The long axis of the volume is oriented NW-SE. The reloc ...
... The resulting distribution of hypocenters of the MLFs (Fig. 3) has several striking features. Hypocenters of the MLFs occupy an ellipsoidal volume roughly 5 km in diameter with its center offset 3 km to the northeast of the summit of Mt. Fuji. The long axis of the volume is oriented NW-SE. The reloc ...
Deformation in the asthenospheric mantle beneath the Carpathian
... We used the shear wave splitting method [e.g., Vinnik et al., 1984; Silver and Chan, 1988] to constrain anisotropy. This method has become a routine means of characterizing mantle anisotropy by analyzing the splitting of core shear waves, SK(K)S, during their voyage through anisotropic structures [S ...
... We used the shear wave splitting method [e.g., Vinnik et al., 1984; Silver and Chan, 1988] to constrain anisotropy. This method has become a routine means of characterizing mantle anisotropy by analyzing the splitting of core shear waves, SK(K)S, during their voyage through anisotropic structures [S ...