Global ETD Search
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Showing 1 to 5 of 5 for “"ULVZs"”.
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Mapping the Core-Mantle Boundary Using Sdiff Postcursors
… boundary, called ultra-low velocity zones (ULVZs). The largest of these anomalies have been associated with whole-mantle plumes at the base of major hotspots (Hawaii, Iceland, Samoa, and Galapagos), and have been suggested to act as a plume root and geochemical reservoir. In this thesis, we …
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Seismic Imaging of Earth’s Core-Mantle Boundary using Diffracted Waves
… Provinces (LLSVPs) and Ultra-Low Velocity Zones (ULVZs) have been reported in this region. We analyse seismic diffraction in different aspects including real data observations, numerical synthetics, asymptotic theory, and use it as a tool to resolve the fine-scale structure close to the core- …
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Seismic and gravitational studies of melting in the mantle's thermal boundary layers
… finite-width ultra-low velocity zones (ULVZs) at the core-mantle boundary. Together these three studies highlight the dynamic complexities of melting in the mantle while offering new tools to understand that complexity.
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Seismic and gravitational studies of melting in the mantle's thermal boundary layers
… finite-width ultra-low velocity zones (ULVZs) at the core-mantle boundary. Together these three studies highlight the dynamic complexities of melting in the mantle while offering new tools to understand that complexity.
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The character of the core-mantle boundary : a systematic study using PcP
… is evaluated for these ultra-low velocity zones (ULVZs). The aim of this thesis is to analyse the behaviour of PcP between 10° and 40° source distance for such models using different velocity and density configurations. Furthermore, the resolution limits of seismic data are discussed. The …