How Plate-forming Processes Explain Structure and Shortening in
... belts where shortening is constrained by a single restored cross‐section, a consistent average error of 20% was assumed. Cross‐sections were carefully selected so that inferred shortening values best capture the long‐term evolution of fold and thrust belts. Such single data are provided for large‐sc ...
... belts where shortening is constrained by a single restored cross‐section, a consistent average error of 20% was assumed. Cross‐sections were carefully selected so that inferred shortening values best capture the long‐term evolution of fold and thrust belts. Such single data are provided for large‐sc ...
Crustal seismicity and the earthquake catalog maximum moment
... Early Proterozoic cratons with cold, stable continental lithospheric roots have fewer crustal earthquakes and a lower maximum earthquake catalog moment magnitude (Mcmax). The geographic distribution of thick lithospheric roots is inferred from the global seismic model S40RTS that displays shear-velo ...
... Early Proterozoic cratons with cold, stable continental lithospheric roots have fewer crustal earthquakes and a lower maximum earthquake catalog moment magnitude (Mcmax). The geographic distribution of thick lithospheric roots is inferred from the global seismic model S40RTS that displays shear-velo ...
Geochemistry, Geophysics, Geosystems
... Figure 1. Topographic map of North America (km). Red, pink, and blue-dashed contours show the boundaries between the Archean, Proterozoic, and Phanerozoic tectonic provinces. White labels stand as follows: AP, Appalachians; BR, Basin and Range; CA, Cascade; CHCr, Churchill craton; CI, Cuba Island; C ...
... Figure 1. Topographic map of North America (km). Red, pink, and blue-dashed contours show the boundaries between the Archean, Proterozoic, and Phanerozoic tectonic provinces. White labels stand as follows: AP, Appalachians; BR, Basin and Range; CA, Cascade; CHCr, Churchill craton; CI, Cuba Island; C ...
P-and S-wave velocities of the lowermost crustal rocks from the
... microcracks at high pressures (e.g. Birch, 1960; 1961; Kern, 1978; Kern and Richter, 1981). Although our Vp and Vs measurements were carried out during the depressurization process, some microcracks might have partially reopened during the depressurization at low pressures. In addition, heating at l ...
... microcracks at high pressures (e.g. Birch, 1960; 1961; Kern, 1978; Kern and Richter, 1981). Although our Vp and Vs measurements were carried out during the depressurization process, some microcracks might have partially reopened during the depressurization at low pressures. In addition, heating at l ...
Crustal flow in Tibet: geophysical evidence for the physical state of
... corridor across the plateau (this transect will continue in 2007 as INDEPTH-4 across the northern boundary of Tibet). Without minimizing the contributions of many other groups, these three international programs collected data that continue to be re-analyzed today, a decade or more after acquisition ...
... corridor across the plateau (this transect will continue in 2007 as INDEPTH-4 across the northern boundary of Tibet). Without minimizing the contributions of many other groups, these three international programs collected data that continue to be re-analyzed today, a decade or more after acquisition ...
Density structure and geometry of the Costa Rican subduction zone
... (von Huene et al., 2000). This paper focuses on the subduction zone, geometry the density distribution of the subducting slab under Costa Rica, and on the relationship between the density structure and the seismicity distribution. The 3D density modeling based on interpretation of the satellitederiv ...
... (von Huene et al., 2000). This paper focuses on the subduction zone, geometry the density distribution of the subducting slab under Costa Rica, and on the relationship between the density structure and the seismicity distribution. The 3D density modeling based on interpretation of the satellitederiv ...
Geodynamics of the Yellowstone hotspot and mantle plume: Seismic
... Integration of geophysical and geological data show that the Yellowstone hotspot resulted from a mantle plume interacting with the overriding North America plate, a process that has highly modified continental lithosphere by magmatic and tectonic processes and produced the 16-17 Ma, 700-km-long Yello ...
... Integration of geophysical and geological data show that the Yellowstone hotspot resulted from a mantle plume interacting with the overriding North America plate, a process that has highly modified continental lithosphere by magmatic and tectonic processes and produced the 16-17 Ma, 700-km-long Yello ...
Geophysical Constraints on Mantle Composition
... hence Vj) for single crystals (Zha et al., 1998a). The second group of acoustic methods, the ultrasonic techniques, require larger samples but can be performed on either single crystals or polycrystalline aggregates. They require experimental measurement (via interferometry) of the travel times of t ...
... hence Vj) for single crystals (Zha et al., 1998a). The second group of acoustic methods, the ultrasonic techniques, require larger samples but can be performed on either single crystals or polycrystalline aggregates. They require experimental measurement (via interferometry) of the travel times of t ...
Crustal geophysical research helps constrain the nature of mantle
... 2.1.2. Velocity Structure of Igneous Provinces Most existing melting models assume that, once mantle melts, the magma rises through the lithosphere and is eventually emplaced to form igneous crust. The crustal volume, as well as the physical properties of the igneous rocks produced, depend on the te ...
... 2.1.2. Velocity Structure of Igneous Provinces Most existing melting models assume that, once mantle melts, the magma rises through the lithosphere and is eventually emplaced to form igneous crust. The crustal volume, as well as the physical properties of the igneous rocks produced, depend on the te ...
Intrinsic versus extrinsic seismic anisotropy: The radial anisotropy in
... and Lundquist, 1982]. Under finite strain accumulation [Ribe, 1992], they can obtain a lattice or crystallographic preferred orientation (LPO or CPO), resulting in large-scale (>1 km) anisotropy. This can provide fundamental information on the structure and the geodynamic processes of the Earth [Hess ...
... and Lundquist, 1982]. Under finite strain accumulation [Ribe, 1992], they can obtain a lattice or crystallographic preferred orientation (LPO or CPO), resulting in large-scale (>1 km) anisotropy. This can provide fundamental information on the structure and the geodynamic processes of the Earth [Hess ...
LCGT-V5
... resonance. This lower pendulum resonant frequency can be easily matched in the vertical direction with the GAS filter tuning. A proper simulation should be performed to simulate the overall chain attenuation power as function of tunnel separation and evaluate the real gain. Because longer wires are ...
... resonance. This lower pendulum resonant frequency can be easily matched in the vertical direction with the GAS filter tuning. A proper simulation should be performed to simulate the overall chain attenuation power as function of tunnel separation and evaluate the real gain. Because longer wires are ...
Subduction of the Daiichi Kashima Seamount in the Japan Trench
... of the other two sets, N-S and N140”, do not align with any other known regional features. Possibly they are related to the internal structure of the seamount basement. The N140” direction is exactly perpendicular to the trench and corresponds ...
... of the other two sets, N-S and N140”, do not align with any other known regional features. Possibly they are related to the internal structure of the seamount basement. The N140” direction is exactly perpendicular to the trench and corresponds ...
GEOPHYSICAL CHARACTERISTICS OF THE NINETYEAST RIDGE
... Forward modeling of slab residual gravity anomaly along the six profiles is carried out, using the USGS Potential Field Saki subroutine and the GMSYS software package, under seismic constraints on water/sediment thickness and NER relief. ...
... Forward modeling of slab residual gravity anomaly along the six profiles is carried out, using the USGS Potential Field Saki subroutine and the GMSYS software package, under seismic constraints on water/sediment thickness and NER relief. ...
Mantle discontinuities beneath the Deccan volcanic
... velocity zone below 200 km were mapped through teleseismic P-wave tomography [14]. This seismic anomaly is seen to link to the Narmada rift and possibly extends further south beneath the Western Ghats, the main effusive phase in the DVP, where the tomograms were not well resolved. Earlier, tomograph ...
... velocity zone below 200 km were mapped through teleseismic P-wave tomography [14]. This seismic anomaly is seen to link to the Narmada rift and possibly extends further south beneath the Western Ghats, the main effusive phase in the DVP, where the tomograms were not well resolved. Earlier, tomograph ...
Figure 1 - ePrints Soton - University of Southampton
... material above the oceanic Moho is commonly referred to as the crust, it does not necessarily comprise solely products of partial melting. The remarkable consistency of seismic velocities in layer 3, the lower oceanic crust, was apparent in early compilations of results from seismic refraction profi ...
... material above the oceanic Moho is commonly referred to as the crust, it does not necessarily comprise solely products of partial melting. The remarkable consistency of seismic velocities in layer 3, the lower oceanic crust, was apparent in early compilations of results from seismic refraction profi ...
Determining crustal structure beneath seismic stations overlying a
... t1 , t2 , and t3 correspond to the theoretical moveout of PmS, PPmS, and PSmS phases in the subsediment crust. The optimal pair of Hi and kj corresponds to the maximum amplitude of A(Hi , kj ). To better understand the time terms in equation (5), let us consider a hypothetical situation of vertical ...
... t1 , t2 , and t3 correspond to the theoretical moveout of PmS, PPmS, and PSmS phases in the subsediment crust. The optimal pair of Hi and kj corresponds to the maximum amplitude of A(Hi , kj ). To better understand the time terms in equation (5), let us consider a hypothetical situation of vertical ...
fault-related carbonate rocks and earthquake indicators
... 2008], pseudotachylytes are absent in fault-zones hosted in carbonate-bearing rocks, where, in contrast, fault rock assemblages such as cataclasites, pulverized rocks, or fluidized gouges occur rather frequently. The interpretation of these rock assemblages remains enigmatic. Can they be produced du ...
... 2008], pseudotachylytes are absent in fault-zones hosted in carbonate-bearing rocks, where, in contrast, fault rock assemblages such as cataclasites, pulverized rocks, or fluidized gouges occur rather frequently. The interpretation of these rock assemblages remains enigmatic. Can they be produced du ...
Lithospheric and upper mantle structure of the northeastern Tibetan
... Moho and the light dashed lines identify the underthrust Lhasa Terrane lithosphere slab (ULS) and the crustal layers. These lines were taken from the P wave migration image and plotted on the other images for comparison. corner frequency of 2.5 Hz was applied to the deconvolved traces. In the classi ...
... Moho and the light dashed lines identify the underthrust Lhasa Terrane lithosphere slab (ULS) and the crustal layers. These lines were taken from the P wave migration image and plotted on the other images for comparison. corner frequency of 2.5 Hz was applied to the deconvolved traces. In the classi ...
Crustal Structure at the Continental Margin South of South Africa
... Isopachs of sediment thickness over the Agulhas Arch show the extent of the basement outcrop and the shape of the west and east flanks of the arch. On the west, straight contours suggest a rather simple slope in basement; on the east, uneven contours suggest downfaulting and the presence of minor an ...
... Isopachs of sediment thickness over the Agulhas Arch show the extent of the basement outcrop and the shape of the west and east flanks of the arch. On the west, straight contours suggest a rather simple slope in basement; on the east, uneven contours suggest downfaulting and the presence of minor an ...