Geological Survey of Denmark and Greenland Bulletin 33
... sonobuoys were deployed along the profi les to record the seismic energy at larger offsets of up to 34 km. Ray-tracing modelling was then used to obtain velocity models of sediments in the Amundsen Basin. The velocities show little scatter (Fig. 4). Assuming normal compaction, the data points can be ...
... sonobuoys were deployed along the profi les to record the seismic energy at larger offsets of up to 34 km. Ray-tracing modelling was then used to obtain velocity models of sediments in the Amundsen Basin. The velocities show little scatter (Fig. 4). Assuming normal compaction, the data points can be ...
and the Korea Strait
... ABSTRACT: Group velocity maps were derived for the southern East Sea (Japan Sea) and the Korea Strait (Tsushima Strait) for the 5–36 s period range, which is sensitive to shear wave velocities of the crust and the uppermost mantle. Images produced in our study enhance our understanding of the tecton ...
... ABSTRACT: Group velocity maps were derived for the southern East Sea (Japan Sea) and the Korea Strait (Tsushima Strait) for the 5–36 s period range, which is sensitive to shear wave velocities of the crust and the uppermost mantle. Images produced in our study enhance our understanding of the tecton ...
Statistical Features of Seismic Noise
... some information on the site response (see the review of Bard, 1999 and references therein): using absolute spectra or spectral ratios with respect of a reference site or spectral ratio of horizontal over vertical component of a single station (H/V spectral ratio). All of them are based on physical ...
... some information on the site response (see the review of Bard, 1999 and references therein): using absolute spectra or spectral ratios with respect of a reference site or spectral ratio of horizontal over vertical component of a single station (H/V spectral ratio). All of them are based on physical ...
Earth as a Planet
... of planets. At the beginning of the 16th century A.D., Nicolaus Copernicus proposed that Earth and all the other planets orbit the Sun. With the Sun at the center, this model is called the heliocentric model, or "sun-centered" model. Although Copernicus’ model was simpler –it didn’t need epicycles a ...
... of planets. At the beginning of the 16th century A.D., Nicolaus Copernicus proposed that Earth and all the other planets orbit the Sun. With the Sun at the center, this model is called the heliocentric model, or "sun-centered" model. Although Copernicus’ model was simpler –it didn’t need epicycles a ...
Worldwide distribution of ages of the continental lithosphere derived
... he computed the decrease in density that results from the extraction of basalt from a fertile (basalt rich) mantle and showed that this deficit is sufficient to prevent cratons from sinking. The subcrustal lithosphere of cratons is depleted and less dense than the primitive mantle, even though the roo ...
... he computed the decrease in density that results from the extraction of basalt from a fertile (basalt rich) mantle and showed that this deficit is sufficient to prevent cratons from sinking. The subcrustal lithosphere of cratons is depleted and less dense than the primitive mantle, even though the roo ...
The influence of crenulation cleavage development on the bulk
... et al., 2007), and (5) neutron diffraction (Ivankina et al., 2005). Each method has its advantages and disadvantages (Ullemeyer et al., 2000; Wenk et al., 2007), but overall the X-ray texture goniometry, synchrotron X-rays, and neutron diffraction methods are more suitable for determining bulk rock ...
... et al., 2007), and (5) neutron diffraction (Ivankina et al., 2005). Each method has its advantages and disadvantages (Ullemeyer et al., 2000; Wenk et al., 2007), but overall the X-ray texture goniometry, synchrotron X-rays, and neutron diffraction methods are more suitable for determining bulk rock ...
COMPOSITE PLASTER CEMENT-BASED ELECTROMAGNETIC WAVE ABSORBER Johann Christiaan Pretorius by
... bands, wireless communications, WiFi, electromagnetic interference ...
... bands, wireless communications, WiFi, electromagnetic interference ...
Three-dimensional ionospheric tomography of post
... GPS Service (IGS). Although the raw 1 s sampling GPS data is demonstrated below to be much superior in quality, our main data are the only data provided freely by the GPS dense networks at 30 s sampling rate. These dense GPS networks, shown in Fig. 2, have been mainly developed for geodetic applicat ...
... GPS Service (IGS). Although the raw 1 s sampling GPS data is demonstrated below to be much superior in quality, our main data are the only data provided freely by the GPS dense networks at 30 s sampling rate. These dense GPS networks, shown in Fig. 2, have been mainly developed for geodetic applicat ...
Seismic strike-slip faults on a major boundary transverse to the
... Apulian platform during the syn-orogenic stage of the Alpine orogen that followed the final collision between the Apulia (northern promontory of the African plate) and the European plate margins of the Apennines and Dinarides (Aubouin [1], Disperati et al. [2], Jolivet [4]). This sequence is tecton ...
... Apulian platform during the syn-orogenic stage of the Alpine orogen that followed the final collision between the Apulia (northern promontory of the African plate) and the European plate margins of the Apennines and Dinarides (Aubouin [1], Disperati et al. [2], Jolivet [4]). This sequence is tecton ...
yer-17-3-7-0804-5:Mizanpaj 1 - Tubitak Journals
... Introduction The most important point in plate tectonics is the thickness of the lithosphere and how it behaves for long geological eras. With the development of isostasy, one of the basic assumptions of the plate tectonics was put forward which is a fact that the plates have long been remained rigi ...
... Introduction The most important point in plate tectonics is the thickness of the lithosphere and how it behaves for long geological eras. With the development of isostasy, one of the basic assumptions of the plate tectonics was put forward which is a fact that the plates have long been remained rigi ...
Compositional Stratification in the Deep Mantle
... heat production of the average chondritic meteorite, the total heat production would be 31 TW; the remaining 13 TW would be provided by cooling of the planet by 65 K per 109 years. Geochemical analyses of basalts, however, show that the source region of MORBs is depleted in heat production by a fact ...
... heat production of the average chondritic meteorite, the total heat production would be 31 TW; the remaining 13 TW would be provided by cooling of the planet by 65 K per 109 years. Geochemical analyses of basalts, however, show that the source region of MORBs is depleted in heat production by a fact ...
The role of water in connecting past and future episodes of
... mantle where the average Q factor is low and may be less important in the transition zone where the reference Q factor is high. Either way, partial melt or lowered Q will lead to more strongly reduced S-velocities in the sub-lithospheric mantle, as observed here beneath the US East Coast. We thus in ...
... mantle where the average Q factor is low and may be less important in the transition zone where the reference Q factor is high. Either way, partial melt or lowered Q will lead to more strongly reduced S-velocities in the sub-lithospheric mantle, as observed here beneath the US East Coast. We thus in ...
Evidence of active mantle flow beneath South China
... deformation, and thus provide constraints for quantification of the forces generating geologic features. These are generally attributed to buoyancy forces resulting from density variations within the lithosphere and the integrated effect of large-scale tractions acting at the base of tectonic plates ...
... deformation, and thus provide constraints for quantification of the forces generating geologic features. These are generally attributed to buoyancy forces resulting from density variations within the lithosphere and the integrated effect of large-scale tractions acting at the base of tectonic plates ...
SUBDUCTION ZONE)
... Seismic attenuation is important for predictions of strong earthquake ground motions, and also it gives additional constraints on the physical properties of deep medium. In (Petukhin et al., 2003) the high-frequency (HF) Q-value, parameter of seismic attenuation was studied in Kinki region. In that ...
... Seismic attenuation is important for predictions of strong earthquake ground motions, and also it gives additional constraints on the physical properties of deep medium. In (Petukhin et al., 2003) the high-frequency (HF) Q-value, parameter of seismic attenuation was studied in Kinki region. In that ...
Rupture Characteristics of the Deep Bolivian Earthquake of 9 June
... surface events. Frictional sliding, the mechanism that causes earthquakes at shallow depths, is restricted to pressures lower than about 1 to 2 GPa (depths of 30 to 60 km); at high pressures and temperatures, faulting is expected to be replaced by ductile deformation (1 ). These deeper events then r ...
... surface events. Frictional sliding, the mechanism that causes earthquakes at shallow depths, is restricted to pressures lower than about 1 to 2 GPa (depths of 30 to 60 km); at high pressures and temperatures, faulting is expected to be replaced by ductile deformation (1 ). These deeper events then r ...
4.5. Control system - Hanford Observatory
... constrained layers of damping material as shown in figure 4. Damping is required in the springs to limit motion on the stack resonances, which lie between 1.5 and 15 Hz. The damping material is sandwiched between aluminum slugs and the phosphor bronze walls, prior to coiling the springs. End caps ar ...
... constrained layers of damping material as shown in figure 4. Damping is required in the springs to limit motion on the stack resonances, which lie between 1.5 and 15 Hz. The damping material is sandwiched between aluminum slugs and the phosphor bronze walls, prior to coiling the springs. End caps ar ...
empirical correlation between the shear
... the shear modulus (GMAX or Go) and the Young’s modulus (Eo and Er) were estimated. The main aim of this paper is not to give an empirical correlation between VS - NDPH as a substitute for seismic measurements, but to show a reliable way of comparing two different experimental approaches at low strai ...
... the shear modulus (GMAX or Go) and the Young’s modulus (Eo and Er) were estimated. The main aim of this paper is not to give an empirical correlation between VS - NDPH as a substitute for seismic measurements, but to show a reliable way of comparing two different experimental approaches at low strai ...
Crustal and upper mantle structure beneath southwestern margin of
... 1993]. In our initial model, velocities are organized in successive horizontal layers of nodes, with an interpolation gradient between each of them [Thurber, 1983]. The minimum distance between two nodes horizontally is 20 km (i.e., the minimum distance between two stations). The node spacing is 40– ...
... 1993]. In our initial model, velocities are organized in successive horizontal layers of nodes, with an interpolation gradient between each of them [Thurber, 1983]. The minimum distance between two nodes horizontally is 20 km (i.e., the minimum distance between two stations). The node spacing is 40– ...
What is Basin Modeling
... What is Basin Modelling 1 Interpretation & depht convertion 2 Geohistory 3 Isostasy 4 Tectonics 5 Temperature 6 Hydrocarbon Maturation 7 Hydrocarbon Migration ...
... What is Basin Modelling 1 Interpretation & depht convertion 2 Geohistory 3 Isostasy 4 Tectonics 5 Temperature 6 Hydrocarbon Maturation 7 Hydrocarbon Migration ...
Document
... For the the measured value differs by 9 standard deviations from the QED calculation. This arises from the fact that for the there are further corrections to a due to the strong and weak interactions. Hadrons do not couple directly to the , but they can couple to the virtual photon. We theref ...
... For the the measured value differs by 9 standard deviations from the QED calculation. This arises from the fact that for the there are further corrections to a due to the strong and weak interactions. Hadrons do not couple directly to the , but they can couple to the virtual photon. We theref ...
Listric Thrust Faulting in the Laramide Front of North
... faults and folds that step right to the north, forming a ragged, sawtooth pattern of uplifted units. These structural steps range in size from 50 km between the en echelon Sangre de Cristo, Wet Mountain, and Front Range arches to 10 km along the margin of the northeastern Front Range. South of the S ...
... faults and folds that step right to the north, forming a ragged, sawtooth pattern of uplifted units. These structural steps range in size from 50 km between the en echelon Sangre de Cristo, Wet Mountain, and Front Range arches to 10 km along the margin of the northeastern Front Range. South of the S ...
Magnetotellurics
Magnetotellurics (MT) is an electromagnetic geophysical method for inferring the earth's subsurface electrical conductivity from measurements of natural geomagnetic and geoelectric field variation at the Earth's surface. Investigation depth ranges from 300m below ground by recording higher frequencies down to 10,000m or deeper with long-period soundings. Developed in the USSR and France during the 1950s, MT is now an international academic discipline and is used in exploration surveys around the world. Commercial uses include hydrocarbon (oil and gas) exploration, geothermal exploration, mining exploration, as well as hydrocarbon and groundwater monitoring. Research applications include experimentation to further develop the MT technique, long-period deep crustal exploration, and earthquake precursor prediction research.