Global ETD Search
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 10 of 10 for “"Basaltic Volcanism"”.
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Direct numerical simulations of multiphase flow with applications to basaltic volcanism and planetary evolution
… of an exsolved gas phase in the conduit of basaltic volcanoes. The second part examines the solidification processes in magma oceans which entail both degassing (gas-fluid coupling) and crystallization (solid-fluid coupling). For both applications, we find that the fluid dynamics at the …
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A geotechniques-based exploratory investigation of vog impacts to the environmental system on Hawai'i island.
… were chosen for the research site because the basaltic volcanism taking place is significant, and relevant data concerning many environmental variables are readily available. Specifically, changes to spatial and temporal trends in precipitation and surface temperature as well as negative …
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Imaging the mantle in southwestern, Utah using geochemistry, and geographic information systems
Basaltic volcanism is common in the transition zone from the Basin and Range to the Colorado Plateau. This study focuses on an 80 km long transect containing seven separate basalt fields spaced less than 20 km apart. The transect extends from eastern Nevada through northwestern Arizona and into …
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Generation of Buried Transient Landscapes and Residual Depth Anomalies
… relationship is proposed, whereby pulses of basaltic volcanism serve as both sources of CO2 and triggers for methane release, thus generating hyperthermal aberrations. The present-day surface expression of the Icelandic plume is evaluated using a comprehensive database of residual depth …
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Neotectonic evolution of Grand Canyon : interaction between volcanism, river incision, epeirogenic uplift, and faulting
<p>This thesis focuses on the effects of volcanism, river incision, epeirogenic uplift, and faulting on the landscape evolution of the Grand Canyon region. In the first chapter the migration of increasingly asthenospheric basaltic volcanism is used to constrain lithospheric modification of the …
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Microanalytical Constraints on the Geometry and Chemical Evolution of Kīlauea’s Volcanic Plumbing System
… natural laboratory in which to investigate basaltic volcanism, owing to over a century of extensive study. In the last decade, there has been a paradigm shift in our understanding of volcanic plumbing systems, moving away from a model where large vats of melt are stored in the crust, to a …
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Temporal and petrogenetic constraints on volcanic accretionary processes at 9-10 degrees north East Pacific Rise
… recognized. Model age dating of ferrobasalts, basaltic andesites, andesites, and dacites sampled from the east limb of the overlapping spreading center at 9º03’N EPR is difficult due to uncertainties in magma residence times. However, (226Ra/230Th) disequilibria indicate recent basaltic …
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Unveiling the lithospheric and mantle dynamic controls on Antarctic topography
… of thinned lithosphere, and Neogene intraplate basaltic volcanism. Modelling of rare earth element concentrations from these volcanic provinces defines melt fraction as a function of depth, allowing for both mantle potential temperature and lithospheric thickness to be constrained. Results are …
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Temporal and petrogenetic constraints on volcanic accretionary processes at 9-10 degrees North East Pacific Rise
… recognized. Model age dating of ferrobasalts, basaltic andesites, andesites, and dacites sampled from the east limb of the overlapping spreading center at 9'03'N EPR is difficult due to uncertainties in magma residence times. However, (22 6Ra/23 Th) disequilibria indicate recent basaltic …
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Structure and dynamics of the Pacific upper mantle
… buoyancy mechanism which is generated by basaltic volcanism and the formation of its low-density peridotitic residuum. While the basaltic depletion mechanism can produce high shear velocities in the uppermost 200 km, it cannot explain the depth extent of the fast anomalies beneath the …