Seismic wave attenuation and dispersion resulting from wave
... relationship 共see below兲. At intermediate saturations, there is a transition behavior controlled by the fluid-patch arrangement and fluidpatch size that can be modeled consistently with the WIFF mechanism 共Figure 3兲. Lei and Xue 共2009兲 inject 共gaseous and supercritical兲 CO2 into a water-saturated sa ...
... relationship 共see below兲. At intermediate saturations, there is a transition behavior controlled by the fluid-patch arrangement and fluidpatch size that can be modeled consistently with the WIFF mechanism 共Figure 3兲. Lei and Xue 共2009兲 inject 共gaseous and supercritical兲 CO2 into a water-saturated sa ...
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 ...
Fast-decaying IP in frozen unconsolidated rocks and potentialities
... temperature dependence have been given by Reynolds (1997). A similar dependence of the dielectric-relaxation time constant τ on temperature T has been found for frozen coarse-grained unconsolidated rocks. In rocks with high clay content, other factors in addition to temperature, may control the rela ...
... temperature dependence have been given by Reynolds (1997). A similar dependence of the dielectric-relaxation time constant τ on temperature T has been found for frozen coarse-grained unconsolidated rocks. In rocks with high clay content, other factors in addition to temperature, may control the rela ...
Lecture8 - ECED Mansoura
... The model size is adjusted from TINY, to SMALL so that a data segment can be included The SMALL model allows one data segment and one code segment The SMALL model is often used whenever memory data are required for a program A SMALL model program assembles as an execute (.EXE) program file ...
... The model size is adjusted from TINY, to SMALL so that a data segment can be included The SMALL model allows one data segment and one code segment The SMALL model is often used whenever memory data are required for a program A SMALL model program assembles as an execute (.EXE) program file ...
International Ocean Discovery Program
... mass extinction event and the only terrestrial impact with a global ejecta layer. Of the three largest impact structures on Earth, Chicxulub is the best preserved. Chicxulub is also the only known terrestrial impact structure with an intact, unequivocal topographic peak ring. Chicxulub’s role in the ...
... mass extinction event and the only terrestrial impact with a global ejecta layer. Of the three largest impact structures on Earth, Chicxulub is the best preserved. Chicxulub is also the only known terrestrial impact structure with an intact, unequivocal topographic peak ring. Chicxulub’s role in the ...
Magmatic and tectonic patterns over the Northern Victoria Land
... Magnetic lineaments trace major fault zones, including NNW to NNE trending transtensional fault systems that appear to control the emplacement of Neogene age McMurdo volcanics. These faults represent splays from a major NW–SE oriented Cenozoic strike-slip fault belt, which reactivated the inherited ...
... Magnetic lineaments trace major fault zones, including NNW to NNE trending transtensional fault systems that appear to control the emplacement of Neogene age McMurdo volcanics. These faults represent splays from a major NW–SE oriented Cenozoic strike-slip fault belt, which reactivated the inherited ...
Mountain building in Taiwan: A thermokinematic model
... and to the flux of incoming material due to frontal accretion and/or basal underplating so as to maintain a stable selfsimilar geometry dictated by the internal friction angle of the medium and by the shear stresses at the base of the wedge [e.g., Chapple, 1978; Dahlen and Barr, 1989; Davis et al., ...
... and to the flux of incoming material due to frontal accretion and/or basal underplating so as to maintain a stable selfsimilar geometry dictated by the internal friction angle of the medium and by the shear stresses at the base of the wedge [e.g., Chapple, 1978; Dahlen and Barr, 1989; Davis et al., ...
LCGT-V5
... Load reserve. The LCGT load requirements should be easily met by the proposed standard filter. However future evolution with possibly heavier mirrors may require even larger payloads. It is useful to evaluate how much more load can be imposed on the standard filters by changing blades and without re ...
... Load reserve. The LCGT load requirements should be easily met by the proposed standard filter. However future evolution with possibly heavier mirrors may require even larger payloads. It is useful to evaluate how much more load can be imposed on the standard filters by changing blades and without re ...
Phase Transitions and Mineralogy of the Upper Mantle
... This implies that the small amount of clinopyroxene present in lherzolites will completely disappear during higher degrees of partial melting. During even higher degrees of partial melting (or further reaction of mantle rock with melts), other minerals such as orthopyroxene are also significantly af ...
... This implies that the small amount of clinopyroxene present in lherzolites will completely disappear during higher degrees of partial melting. During even higher degrees of partial melting (or further reaction of mantle rock with melts), other minerals such as orthopyroxene are also significantly af ...
Document
... feature that can be identified from the data on a regional scale. A few comments on the radiometric results are also included together with a brief evaluation of the mineral potential of Northern Ireland based on the airborne geophysical data. For the preliminary interpretation many high resolution ...
... feature that can be identified from the data on a regional scale. A few comments on the radiometric results are also included together with a brief evaluation of the mineral potential of Northern Ireland based on the airborne geophysical data. For the preliminary interpretation many high resolution ...
Composition of the Oceanic Crust - DukeSpace
... The oceanic crust plays a key role in the on-going processes that modify the compositions of major Earth reservoirs. As the product of mantle melting, the generation of new oceanic crust continuously changes the composition of the upper mantle from which it forms. This has a profound effect on the m ...
... The oceanic crust plays a key role in the on-going processes that modify the compositions of major Earth reservoirs. As the product of mantle melting, the generation of new oceanic crust continuously changes the composition of the upper mantle from which it forms. This has a profound effect on the m ...
Nitrogen concentration and d N of altered oceanic crust obtained on
... intense alteration represented by AOC from Site 417 (Staudigel et al., 1996). The other group consists of 39 AOC samples from Sites 801 and 1149 offshore of the Mariana and Izu-Bonin margins, respectively, and 14 composite samples for the basalt sections at Site 801 (see description and chemical anal ...
... intense alteration represented by AOC from Site 417 (Staudigel et al., 1996). The other group consists of 39 AOC samples from Sites 801 and 1149 offshore of the Mariana and Izu-Bonin margins, respectively, and 14 composite samples for the basalt sections at Site 801 (see description and chemical anal ...
Earth and Planetary Science
... in regions that contain abundant seamounts and ridges, such as near the Mariana trench (Fig. 2), these traditional approaches are inadequate for investigating the spatial variations in plate bending. In this paper, we present a new approach in identifying the deformed shape of a bending plate. Inste ...
... in regions that contain abundant seamounts and ridges, such as near the Mariana trench (Fig. 2), these traditional approaches are inadequate for investigating the spatial variations in plate bending. In this paper, we present a new approach in identifying the deformed shape of a bending plate. Inste ...
Unit 1 The Ocean Basins
... According to fossil and rock records, oceans have existed on Earth for at least 3.8 billion years. It is easy to think that they are permanent features, ancient and unchanging. However, the only thing that is truly constant about ocean basins — and continents — is that they are always moving and cha ...
... According to fossil and rock records, oceans have existed on Earth for at least 3.8 billion years. It is easy to think that they are permanent features, ancient and unchanging. However, the only thing that is truly constant about ocean basins — and continents — is that they are always moving and cha ...
Geosciences Course Descriptions - The University of Texas at Dallas
... software, plotting facilities, introductory matrix theory, and statistics. Students will examine problems in basic statistical analysis, graphics, and mapping of geological and geophysical data. Development of programming skills in areas directly related to thesis and dissertation research is encour ...
... software, plotting facilities, introductory matrix theory, and statistics. Students will examine problems in basic statistical analysis, graphics, and mapping of geological and geophysical data. Development of programming skills in areas directly related to thesis and dissertation research is encour ...
Special Report 142, 1980. Geology and Slope Stability in Selected
... Manzanita growing on blocky serpentinite .............................................................................................................. 29 ...
... Manzanita growing on blocky serpentinite .............................................................................................................. 29 ...
Evolving deformation along a transform plate boundary: Example
... Tavarnelli, 1998; Woodcock and Rickards, 2003], which in turn may provide insight into the tectonic development of transform plate boundaries. Regions where transpression is partitioned into strike-slip and contractional domains are of particular interest due to the potential for seismicity originat ...
... Tavarnelli, 1998; Woodcock and Rickards, 2003], which in turn may provide insight into the tectonic development of transform plate boundaries. Regions where transpression is partitioned into strike-slip and contractional domains are of particular interest due to the potential for seismicity originat ...
Earthquake Mechanisms and Stress Field
... Zoback 2007; Zang and Stephansson 2010). The main source of non-tectonic stress within the Earth is gravitational loading. This stress is vertical with largest lateral variations near the Earth’s surface being more homogeneous at depth. On the other hand, tectonic stress is mostly horizontal and ori ...
... Zoback 2007; Zang and Stephansson 2010). The main source of non-tectonic stress within the Earth is gravitational loading. This stress is vertical with largest lateral variations near the Earth’s surface being more homogeneous at depth. On the other hand, tectonic stress is mostly horizontal and ori ...
STP 3 & 4 2.5S.1 Basic Geologic and Seismic Information
... 2.5S.1.1.2.4 Mesozoic Rifting (Opening of the Gulf of Mexico and the Atlantic) Although there was some sort of basin developed as the proto-Gulf of Mexico prior to the Cretaceous period, there was no connection to the Atlantic Ocean until the Early Cretaceous period. Jurassic-age salt deposits were ...
... 2.5S.1.1.2.4 Mesozoic Rifting (Opening of the Gulf of Mexico and the Atlantic) Although there was some sort of basin developed as the proto-Gulf of Mexico prior to the Cretaceous period, there was no connection to the Atlantic Ocean until the Early Cretaceous period. Jurassic-age salt deposits were ...
Bulletin of the Geological Society of Denmark, Vol. 29/1-2, pp. 77-101
... molasse sedimentation and Mesozoic rifting, and a southern area which apparently formed a cratonic block from the Early Proterozoic to the Middle Cretaceous. The whole margin was finally separated from the NW Eiu'opean margin by sea floor spreading in the latest Paleocene to earliest Eocene and now ...
... molasse sedimentation and Mesozoic rifting, and a southern area which apparently formed a cratonic block from the Early Proterozoic to the Middle Cretaceous. The whole margin was finally separated from the NW Eiu'opean margin by sea floor spreading in the latest Paleocene to earliest Eocene and now ...
Kinematics of the South Atlantic rift
... deforming during the rifting and breakup of western Gondwana (160–85 Ma; Fig. 1). These blocks are delineated using first order structures, such as main basin-bounding faults, thrust belts or large gradients in reported sediment thickness, indicative of subsurface faulting, in conjunction with poten ...
... deforming during the rifting and breakup of western Gondwana (160–85 Ma; Fig. 1). These blocks are delineated using first order structures, such as main basin-bounding faults, thrust belts or large gradients in reported sediment thickness, indicative of subsurface faulting, in conjunction with poten ...
Determination of seismic wave attenuation: A Review
... during tectonic activities. This energy spreads in the form of waves and while propagating, these waves attenuate non-uniformly in different directions due to the variation in the elastic properties of the propagation medium. The recorded amplitudes of seismic waves are directly related to the atten ...
... during tectonic activities. This energy spreads in the form of waves and while propagating, these waves attenuate non-uniformly in different directions due to the variation in the elastic properties of the propagation medium. The recorded amplitudes of seismic waves are directly related to the atten ...
The Central Basin Spreading Center in the Philippine Sea: Structure
... 126°000 and 133°300E. ‘‘Slow-spreading features’’ (deep rift valleys and nodal basins, rough abyssal hills on the ridge flanks, and mantle Bouguer anomaly lows beneath segment centers) are observed in the eastern CBSC. In contrast, ‘‘fast-spreading’’ features (overlapping spreading centers, volcanic ...
... 126°000 and 133°300E. ‘‘Slow-spreading features’’ (deep rift valleys and nodal basins, rough abyssal hills on the ridge flanks, and mantle Bouguer anomaly lows beneath segment centers) are observed in the eastern CBSC. In contrast, ‘‘fast-spreading’’ features (overlapping spreading centers, volcanic ...
The Upper Mantle Geoid: Implications for Continental Structure and
... out by Anderson (1982), and others, the geoid anomalies in Figure 1a do not correlated well with the present-day tectonic features of the Earth (with the exception of the trenches and hotspots). Most of the power in the Earth’s geoid can be explained in terms of lower-mantle structure imaged by seis ...
... out by Anderson (1982), and others, the geoid anomalies in Figure 1a do not correlated well with the present-day tectonic features of the Earth (with the exception of the trenches and hotspots). Most of the power in the Earth’s geoid can be explained in terms of lower-mantle structure imaged by seis ...
Earthscope
Earthscope is an earth science program using geological and geophysical techniques to explore the structure and evolution of the North American continent and to understand the processes controlling earthquakes and volcanoes. The project has three components: USARRAY, the Plate Boundary Observatory, and the San Andreas Fault Observatory at Depth.The project is funded by the National Science Foundation (NSF), and the data produced is publicly accessible in real-time. Organizations associated with the project include UNAVCO, the Incorporated Research Institutions for Seismology (IRIS), Stanford University, the United States Geological Survey (USGS) and National Aeronautics and Space Administration (NASA). Several international organizations also contribute to the initiative.