Extremely thin crust in the Indian Ocean possibly resulting from
... filtered (2 Hz). The digital signals were then spatially resampled to a 12.5 m receiver interval after applying digital noise attenuation techniques and appropriate digital spatial anti-alias filter providing 958 channels (Martin et al. 2000). The sampling interval was 2 ms and the record length was ...
... filtered (2 Hz). The digital signals were then spatially resampled to a 12.5 m receiver interval after applying digital noise attenuation techniques and appropriate digital spatial anti-alias filter providing 958 channels (Martin et al. 2000). The sampling interval was 2 ms and the record length was ...
integration of rock physics and reservoir simulation for the
... injection program at Weyburn Field, changes in reservoir fluid pressure, fluid composition and saturation are expected. Fluid models are developed for the acoustic properties of brine, oil, and oil - COz mixtures. An anisotropic rock physics model is used to calculate the sensitivity of the seismic ...
... injection program at Weyburn Field, changes in reservoir fluid pressure, fluid composition and saturation are expected. Fluid models are developed for the acoustic properties of brine, oil, and oil - COz mixtures. An anisotropic rock physics model is used to calculate the sensitivity of the seismic ...
Insights into the lithospheric structure and tectonic setting of the
... interpretation (Bungum et al. 2005) and some industry data are available. In general, the accuracy of the depth to basement estimates from the aeromagnetic data is of the order of ±1 km for the deepest part of the basins, but this estimate also depends on the available constraints from seismic data ...
... interpretation (Bungum et al. 2005) and some industry data are available. In general, the accuracy of the depth to basement estimates from the aeromagnetic data is of the order of ±1 km for the deepest part of the basins, but this estimate also depends on the available constraints from seismic data ...
Upper mantle beneath Southeast Asia from S velocity tomography
... is uneven, and so is the distribution of seismic stations; this reduces the ray coverage and therefore the resolution of tomographic imaging using first P arrivals. [14] Seismic structure of the regions with low seismicity and few stations can be constrained with surface waves. Southeast Asia was a ...
... is uneven, and so is the distribution of seismic stations; this reduces the ray coverage and therefore the resolution of tomographic imaging using first P arrivals. [14] Seismic structure of the regions with low seismicity and few stations can be constrained with surface waves. Southeast Asia was a ...
Printer-friendly Version - Solid Earth Discussions
... predicted by the iasp91 model, which clearly indicates that lithospheric P and S velocities beneath the Baltic Shield are higher than in the global iasp91 model. For two northern events at Spitsbergen and Novaya Zemlya we observe a low velocity layer, 60–70 km thick asthenosphere, and the LAB beneat ...
... predicted by the iasp91 model, which clearly indicates that lithospheric P and S velocities beneath the Baltic Shield are higher than in the global iasp91 model. For two northern events at Spitsbergen and Novaya Zemlya we observe a low velocity layer, 60–70 km thick asthenosphere, and the LAB beneat ...
Melt Generation at Very Slow-Spreading Oceanic Ridges
... METHODOLOGY OF SEISMIC MEASUREMENT OF CRUSTAL THICKNESS What do seismic methods measure? Seismic methods measure the thickness of rock down to the Moho, which marks the depth at which a marked increase occurs in the P-wave velocity. The P-wave velocity beneath the Moho is typically 8·1 ± 0·2 km/s, a ...
... METHODOLOGY OF SEISMIC MEASUREMENT OF CRUSTAL THICKNESS What do seismic methods measure? Seismic methods measure the thickness of rock down to the Moho, which marks the depth at which a marked increase occurs in the P-wave velocity. The P-wave velocity beneath the Moho is typically 8·1 ± 0·2 km/s, a ...
A duplex beneath a major overthrust plate in the Montana disturbed
... From the Canadian Rockies in Alberta and British Columbia south into northwestern Montana, the Cordilleran overthrust belt maintains a distinct structural style (Figure 1). A zone of closely spaced imbricate thrust faults within Mesozoic and Paleozoic rocks lies east of large thrust plates, which ca ...
... From the Canadian Rockies in Alberta and British Columbia south into northwestern Montana, the Cordilleran overthrust belt maintains a distinct structural style (Figure 1). A zone of closely spaced imbricate thrust faults within Mesozoic and Paleozoic rocks lies east of large thrust plates, which ca ...
Upper Mantle Tomographic Vp and Vs Images of the Rocky
... belt, and a 100 km deep low velocity "Jemez body" beneath the ProterozoicProterozoic Jemez suture. The Cheyenne slab is most likely a slab fragment accreted against the Archean Wyoming mantle keel during the Proterozoic arc collision processes. If this interpretation is correct, then the ancient sla ...
... belt, and a 100 km deep low velocity "Jemez body" beneath the ProterozoicProterozoic Jemez suture. The Cheyenne slab is most likely a slab fragment accreted against the Archean Wyoming mantle keel during the Proterozoic arc collision processes. If this interpretation is correct, then the ancient sla ...
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... both regional and broad scale tectonic implications. In particular, results from this project will help define what constitutes the boundaries of blocks of Alaska crust, and whether the wide plate boundary zone between the Pacific and North American plates is best characterized by diffuse deformatio ...
... both regional and broad scale tectonic implications. In particular, results from this project will help define what constitutes the boundaries of blocks of Alaska crust, and whether the wide plate boundary zone between the Pacific and North American plates is best characterized by diffuse deformatio ...
Geological Society, London, Special Publications
... (c. 1 m s21), interseismic creep (c. 10–100 mm year21) and intermediate rate transients (e.g. afterslip and slow slip events). Studies of exhumed faults are sometimes able to identify seismic slip surfaces by the presence of frictional melts, and slow creep by textures diagnostic of rate-limited pla ...
... (c. 1 m s21), interseismic creep (c. 10–100 mm year21) and intermediate rate transients (e.g. afterslip and slow slip events). Studies of exhumed faults are sometimes able to identify seismic slip surfaces by the presence of frictional melts, and slow creep by textures diagnostic of rate-limited pla ...
SEISMIC ATTENUATION ANISOTROPY IN THE SOUTHERNMOST
... attenuation compared to other volcanic or tectonic regions. In an anisotropic medium, the attenuation depends on the propagation direction because scatters may be preferentially aligned. Recently, several techniques have been broadly adopted in seismic attenuation anisotropy studies to reveal the ph ...
... attenuation compared to other volcanic or tectonic regions. In an anisotropic medium, the attenuation depends on the propagation direction because scatters may be preferentially aligned. Recently, several techniques have been broadly adopted in seismic attenuation anisotropy studies to reveal the ph ...
Seismic structure of the crust and uppermost mantle of the Capricorn
... Fortescue Group) that are interpreted to have been deposited during continental rifting (Thorne and Trendall, 2001). Evolution of the rifted margin to a passive margin was marked by the deposition of the 2.60–2.45 Ga Hamersley Group within the Hamersley Basin, which is dominated by chemical iron for ...
... Fortescue Group) that are interpreted to have been deposited during continental rifting (Thorne and Trendall, 2001). Evolution of the rifted margin to a passive margin was marked by the deposition of the 2.60–2.45 Ga Hamersley Group within the Hamersley Basin, which is dominated by chemical iron for ...
Dynamic lithosphere within the Great Basin
... DMC, we present new surface-wave tomography and receiver function results to provide constraints on regional crust and uppermost mantle structure that allow us to test the competing models of Great Basin tectonics listed above. These analyses are done independently, allowing for us to compare result ...
... DMC, we present new surface-wave tomography and receiver function results to provide constraints on regional crust and uppermost mantle structure that allow us to test the competing models of Great Basin tectonics listed above. These analyses are done independently, allowing for us to compare result ...