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 20 of 312 for “"Emplacement"”.
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Linking sill morphology to emplacement mechanisms
… history. Most of the current models of sill emplacement assume that brittle fracture operates at all points of sill emplacement. Within this thesis, a series of observations are presented from sheet intrusions in South Africa, USA and the UK showing that in certain situations, dependent on …
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Mechanisms of emplacement of cone sheets, Ardnamurchan, Argyll
… been made in order to determine their mode of emplacement.
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A drop-in-concept for deep borehole canister emplacement
… aspects associated with this approach. For emplacement, past reports suggest using steel cables to lower each canister into the borehole. This process would require many years to complete and precise control to safely lower the canisters thousands of meters. The current study evaluated a …
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Distict element numerical modelling of volcanic debris avalanche emplacement geomechanics.
… The geomechanical processes that occur during emplacement, however, remain poorly understood as emplacement processes must generally be inferred from deposit analysis. Summarizing the literature, this thesis first introduces the general factors that control edifice collapse, mechanisms thought …
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Magma emplacement and deformation in rhyolitic dykes : insight into magmatic outgassing
… the textures and water content within shallow (emplacement depths <500 m) rhyolitic dykes at two Icelandic central volcanoes. It is demonstrated that dyke propagation commenced with the intrusion of gascharged currents that were laden with particles, and that the distribution of intruded …
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Dike-Driven Hydrothermal Processes on Mars and Sill Emplacement on Europa
… the icy moon Europa, I modeled a proposed sill emplacement mechanism using a finite element code and found that water could flow up through an approximately 10 km thick ice shell without freezing. The analysis also found that shallow cracks in the ice combined with deep cracks cause a stress …
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Origin and Emplacement Mechanisms of the Slieve Gullion Ring Dyke Complex, Ireland
… sequence; as well as producing a model for the emplacement of these units. A combination of detailed field observations, mapping, rock sample collection and structural measurements were obtained at selected field sites around the ring dyke complex. In the laboratory, the rock samples obtained …
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L' effet de l'emplacement des yeux sur la mémorisation orthographique
… avait pour but d'étudier la relation entre l'emplacement des yeux jumelé avec des instructions de se faire des images visuelles et la capacité de mémorisation orthographique de mots à non sens. Quarante-quatre sujets ont été répartis en quatre groupes pour lesquels la directive majeure donnée …
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Racial and Relational Urbanisms: The Spatial Politics of Afro-Colombian Emplacement in Bogotá
… that govern everyday life and the politics of emplacement. Conclusively, the research shows how Afro-Colombian spatial praxis and everyday tactics of placemaking can foreshadow new urban futures for the pluri-ethnic Latin American city. While broadening studies on postcolonial urbanism through …
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Conceptual design of an automated system for emplacement and retrieval of nuclear waste
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1987.
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Guiana Shield diamonds, the sub-cratonic lithosphere, and kimberlite emplacement in the upper crust.
… sub-solidus reactions that occur syn- to post- emplacement. We observe that olivine in the presence of calcite is unstable and monticellite is precipitated, within the span of hours, suggesting at least rapid syn-emplacement This decarbonation reaction is directly proportional to temperature and …
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Feasibility of lateral emplacement in very deep borehole disposal of high level nuclear waste
… research in this field has focused on vertical emplacement techniques, horizontal emplacement offers the significant advantages of allowing increased emplacement lengths without crushing of the waste package and the use of a single vertical shaft for drilling multiple horizontal shafts. This …
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Strain path partitioning during forceful emplacement of the Papoose Flat pluton, Inyo Mountains, CA
… not, have occurred synchronously with forceful emplacement.
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Timing and emplacement of the Philipsburg batholith, SW Montana, and a comparison of two magnetic fabric techniques
Magnetic anisotropy is widely used for measuring the orientation of minerals in many rock types. The anisotropy of magnetic susceptibility (AMS) is used extensively to determine magma flow fabrics in both intrusive and extrusive igneous rocks. The anisotropy of anhysteretic remanent magnetization …
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Thermal considerations in the drift due to the emplacement of a horizontal high level nuclear waste container
… completed for two scenarios for the in-drift emplacement scheme i.e. drift without backfill and drift with inverted backfill. Transient and steady state simulations have been carried out for a period of 1000 years and the peak temperatures at the walls of the drift and at the center of the …
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Commonalities in the emplacement of cooling-limited lavas : insights from the 2011-2012 Cordón Caulle rhyolitic eruption
… communities near many volcanoes. Although the emplacement processes of low-viscosity basaltic lava flows are relatively well studied, the infrequency of silicic eruptions has limited our understanding of the emplacement of high-viscosity rhyolitic lavas. The 2011-2012 eruption of Puyehue-Cordón …
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