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 870 for “"mantle"”.
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Mantle plume-midocean ridge interaction : geophysical observations and mantle dynamics
… plume-ridge systems to constrain crustal and mantle density structure at these prominent oceanic features. Numerical models are then used to explore the physical mechanisms controlling plume-ridge interaction and to place theoretical constraints on the temperature anomalies, dimensions, and …
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Mantle plume-midocean ridge interaction : geophysical observations and mantle dynamics
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1996.
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Dynamics of mantle plumes
Mantle plumes are a link between different scales in the Earth’s mantle: They are an important part of large-scale mantle convection, transporting material and heat from the core-mantle boundary to the surface, but also affect processes on a smaller scale, such as melt generation and transport and …
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The Biology of Mantle Cell Lymphoma: Exploring the Gender Difference in Mantle Cell Lymphoma
Mantle cell lymphoma (MCL) is a rare B cell neoplasm that accounts for approximately 4-8% of non-Hodgkin’s lymphomas (NHLs). The median age at diagnosis is 65 years with a male to female predominance of 3:1. It has also been demonstrated that female MCL patients have a greater response to therapy, …
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Kinetic processes of mantle minerals
… with equilibrium major elements distribution in mantle pyroxenes.
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Kinetic processes of mantle minerals
… with equilibrium major elements distribution in mantle pyroxenes.
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Insights into the location, nature and influence of mantle heterogeneity in the Galápagos mantle plume
… of the Earth's, highly heterogeneous, convecting mantle. Our view of the Earth's mantle is, however, partially obscured by processes that influence mantle-derived melts as they transition through the lithosphere (e.g. mixing, assimilation). Nevertheless, via careful consideration of the magmatic …
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Geochemical characterization of endmember mantle components
… abundances in reservoirs of the Earth's mantle, including EM2 (the Enriched Mantle 2), as seen in the Samoan hotspot track, and DMM (the depleted upper mantle), which is sampled at mid-ocean ridges. Together these components comprise up to -50% of the total mantle mass. Much of the …
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Targeted therapies in mantle cell lymphoma
Mantle cell lymphoma (MCL) is characterized by the presence of the t(11 ;14)(g13 ;g32) translocation which results in cyclin Dl over-expression. MCL is one of the most difficult lymphoproliferative disorders to manage with a median survival rate of 43 months from diagnosis. The poor prognosis …
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Impact modification of Mercury's mantle composition
… proportion of proto-Mercury's silicate mantle. Previous investigations demonstrate sufficient removal of mantle material to account for the planets unusually high mean density, but do not consider the effects of multiple silicate and oxide phases. In this study, we extend the present …
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Geochemical characerization of endmember mantle components
… abundances in reservoirs of the Earth's mantle, including EM2 (the Enriched Mantle 2), as seen in the Samoan hotspot track, and DMM (the depleted upper mantle), which is sampled at mid-ocean ridges. Together these components comprise up to [approx.] 50% of the total mantle mass. Much of …
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Elasticity of some mantle crystal structures,
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1971.
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Upper mantle reflectivity beneath an intracratonic basin: insights into the behavior of the mantle beneath Illinois basin.
… images of the lower crust and uppermost mantle beneath the Illinois basin have been derived from reprocessing of several hundred kilometers of industry seismic reflection data using extended vibroseis recorrelation. The recorrelation was based on extending an originally 4-s correlated …
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Origin of geochemical heterogeneity in the mantle : constraints from volcanism associated with Hawaiian and Kerguelen mantle plumes
Lavas derived from long-lived mantle plumes provide important information of mantle compositions and the processes that created the geochemical heterogeneity within the mantle. Kerguelen and Hawaii are two long-lived mantle plumes and lavas associated with them have very different geochemical …
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Mantle Heterogeneity Through Mid-Ocean Ridge Basalts
The chemical heterogeneity of Earth's upper mantle is often examined through mid-ocean ridge basalts (MORB), which contest the prevalent assumption of a well-mixed convecting mantle. This dissertation delves into studying mantle heterogeneity from a local to regional scale. Initially, petrological …
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Seismic Studies of the Mantle Transition Zone
… show that due to high VP near the bottom of the mantle transition zone, the contrast in VP across the 660-km discontinuity beneath central Tibet is small (around 3.1%): only about 70% of that beneath the northern Indian shield. This sub-horizontal anomaly of high V P is most likely a remnant of …
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