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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 40 for “"Receiver Function"”.
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Comparison of receiver function deconvolution techniques
Receiver function (RF) techniques are commonly used by geophysicists to image discontinuities and estimate layer thicknesses within the crust and upper mantle. A receiver function is a time-series record of the P-to-S (Ps) teleseismic wave conversions within the earth and can be viewed as the …
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Receiver function study in northeast Tibet and adjacent boundaries
… plateau Seismic (NETS) project, we performed receiver functions analysis across the northeastern Tibetan plateau and adjacent boundaries. Using the data of about 500 events obtained from 61 broad-band stations, we provided a detailed image of the Moho geometry and constraints on the …
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Receiver function imaging of mantle transition zone discontinuities beneath Alaska
… extent of the subducted slabs. We conducted a receiver function study to map the topography of the 410 km and the 660 km discontinuities beneath Alaska and its adjacent areas by taking advantage of the teleseismic data from the new USArray deployment in Alaska and northwestern Canada. Stacking …
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Seismic discontinuities and order estimation using wavelets : a receiver function approach
… isolated through a single station/multiple event receiver function technique which uses a wavelet deconvolution and denoising known as WaRD. It is an edge-preserving damped least squares solution with a small water level and subsequent wavelet thresholding. The deconvolved data is then imaged …
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Receiver function analysis of crustal and upper mantle structure beneath Southern Africa
Bibliography: leaves 101-111.
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Der obere Mantel in der Eifel-Region untersucht mit der Receiver Function Methode
… Mitteleuropas ist. In dieser Arbeit wird die Receiver Function Methode verwendet, um die Strukturen des oberen Mantels zu untersuchen. 96 teleseismische Beben (mb > 5.2) wurden ausgewertet, welche von permanenten und mobilen breitbandigen und kurzperiodischen Stationen aufgezeichnet wurden. …
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Receiver function studies of crustal structure, composition, and evolution beneath the Afar Depression, Ethiopia
"The dissertation utilizes a set of sophisticated computer programs developed at the Geophysics group at Missouri S&T to characterize crustal properties beneath the Afar Depression in Ethiopia where extensional tectonics dominates. In this study, measurements of crustal thickness (H), crustal mean …
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Ps receiver function imaging of crustal structure and Moho topography beneath the Northeast Caribbean.
… of complex plate boundaries. We conduct P-to-S receiver function studies of the Northeast Caribbean in order to image the plate boundary and study the major forces driving tectonics and strain distribution in the region. To calculate a velocity model for migration, we implement a technique …
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Dynamics of the North American Plate: Numerical Development, Mantle Flow Modeling, and Receiver Function Analysis
… Another part of this dissertation reports the receiver function analysis along a recent dense seismic array across the eastern U.S from the western border of Ohio to the Atlantic coast of Virginia. 3D stacking yields shallowing trends of 410-km and 660-km discontinuities and thinning transition …
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Testing the Utility of S Receiver Function Analysis For Mapping Seismic Discontinuities In the Sierran Lithosphere
… et al., 2009).</p> <p>The experimental S receiver function technique utilizes teleseismic S and Sp converted phases to map lithospheric seismic discontinuities. Though the method has been successfully implemented using large datasets from long-term deployments, few successful detailed …
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Receiver function investigations of mantle transition zone and crustal structure in East Africa and Northeast Asia
… imaged by stacking an unprecedented volume of receiver functions (RFs). The normal MTZ thickness beneath the Western Branch of the EARS and Tanzania Craton indicates the absence of present-day thermal upwelling from the lower mantle. In contrast, beneath the Eastern Branch, a significant MTZ …
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Crustal structure and tectonics of Borneo and Sulawesi: results from receiver function analysis and virtual deep seismic sounding
… by stations on the surface. I utilise both receiver function analysis (RFA) and virtual deep seismic sounding (VDSS) to extract information from mode converted and reflected phases to constrain seismic properties including Moho depth, V_S and V_P 〖/V〗_S. In the case of RFA, H-k stacking, …
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MANTLE FLOW AND TRANSITION ZONE DISCONTINUITIES BENEATH THE CARRIBEAN PLATE: CONSTRAINTS FROM SHEAR WAVE SPLITTING AND RECEIVER FUNCTION ANALYSES
<p>"Azimuthal anisotropy quantified by teleseismic SKS, SKKS, PKS (“XKS”) and local S wave splitting parameters is used to investigate lithospheric deformation and asthenospheric flow beneath the boundary zone of the North American and Caribbean plates and adjacent areas. A total of 4915 XKS and …
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Imaging the crust and uppermost mantle of north central Alaska using the joint inversion of ambient seismic noise correlation and receiver function
… of ambient seismic noise correlation and receiver function analysis show a representation of the crustal and uppermost mantle velocity structure in north central Alaska. Due to the lack of station coverage and inhospitable terrain, the structure beneath northern Alaska remains largely …
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Crustal modification by tectonic events and upper mantle anisotropy beneath the Midcontinent Rift and New Madrid Seismic Zone: insights from receiver function studies and teleseismic shear wave splitting
… In this dissertation, shear wave splitting and receiver function techniques were employed to study the extent of crustal and upper mantle modifications beneath the New Madrid Seismic Zone (NMSZ) and the Midcontinent Rift (MCR). Shear wave splitting analysis in the MCR reveals the presence of …
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Lithospheric Structure Across the Northern Canadian Cordillera from Teleseismic Receiver Functions
… tectonic setting of a region. Teleseismic P-wave receiver function techniques can provide estimates of the depth of the Moho and therefore crustal thickness under a broadband station. In this research we are interested in the structure of the crust and mantle across the northern Canadian …
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Teleseismic imaging of the Slave craton and implications for the assembly of cratonic lithosphere
… seismic discontinuities in the lithosphere using receiver-function analysis of converted P-to-S waves. The resulting seismic profile shows a pronounced low velocity discontinuity at -100 km depth beneath the central Slave craton. This seismic discontinuity shows striking spatial correlation with …
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A broad Iceland plume associated with two phase transitions at the 660 km discontinuity: Constraints from receiver functions
… wavespeed anomaly. Here we utilize a robust receiver-function-based technique to image the topography of the 410 and 660 km discontinuities bordering the mantle transition zone beneath Iceland and surrounding oceanic regions, and construct thermal and seismic wavespeed models of the upper …
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Seismic investigation of the Matador Arch and Central Basin Platform
… and wavefield iterative deconvolution receiver function methods before being stacked. The Moho and midcrustal discontinuity both deepen in the northern region of the Central Basin Platform beneath mafic intrusions in the upper crust. Gravity anomaly maps, known basement rock location …
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Crustal structure beneath hi-climb seismic array in western Tibetan plateau from a generalized H-κ method
Receiver function(RF) is commonly used for analyzing seismic waves generated at structural boundaries and imaging major interfaces of the Earth. The traditional H-κ method using grid search and RF stacking developed by Zhu and Kanamori (2000) has been applied for calculating H and κ of the crust …
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