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 274 for “"Lithosphere"”.
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Seismic studies of subducted lithosphere
… and the state of strain within the subducted lithosphere are highly variable along both the strike and dip. In particular, I observed down-dip compressional strain in the northern and central portions of the arc between depths of 200 and 650 km. In these regions, deformation of the subducted …
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Numerical experiments on continental lithosphere extension
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Science, 1982.
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The isotopic evolution of the British lithosphere
A Sm-Nd mineral isochron obtained from an olivine gabbro yields an age of 375 +/- 34 Ma (M.S.W.D. = 0.006) and represents the formation age of the Lizard Igneous Complex. Two magmatic suites are recorded in the complex, an early trace element enriched (ENd<sub>375</sub> = + 8.9 - + 10.1) and a late …
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The morphology and dynamics of subducting lithosphere
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1989.
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Small-scale convection and the evolution of the lithosphere
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1985.
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Time dependent deformation and stress diffusion in the lithosphere
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1981.
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Imaging and interpreting seismic heterogeneity in the North American lithosphere
… of seismic heterogeneity within the cratonic lithosphere. I present a joint inversion of body and surface wave travel-times to determine independent but mutually-constrained variations in V[subscript p] and V[subscript s] within the continental United States. From this, the V[subscript p] …
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Intraplate earthquakes and the state of stress in oceanic lithosphere
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric and Planetary Sciences, 1984.
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Nonlocalized faulting in a thick lithosphere : application to lunar contraction
… system of compressive faults. We model the lunar lithosphere as a layered elastic medium that fails according to a Mohr-Coulomb criterion. We use elastic constants inferred from lunar seismic profiles, and use a finite element code to model the response of this lithosphere to contraction. We find …
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On the ability of rocks to conduct heat in the lithosphere
… D for modeling thermal conduction in the lithosphere.
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Three dimensional geodetic inversion method for stress modelling in the lithosphere
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Science, 1980.
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Seismic wave scattering and the small scale inhomogeneities in the lithosphere
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric and Planetary Sciences, 1984.
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Seismic and numerical constraints on the formation and evolution of oceanic lithosphere
… aspects of the basic structure of oceanic lithosphere that are shaped by the processes that form the lithosphere. The strength of lithospheric plates relative to the underlying mantle enables the surface plate motions and plate boundary processes that characterize plate tectonics on Earth. …
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Inferring the thermomechanical state of the lithosphere using geophysical and geochemical observables
… in terms of the thermomechanical state of the lithosphere. In Chapter 1, I correlate lower crustal rheology with seismic wave speed. Compositional variation is required to explain half of the total variability in predicted lower crustal stress, implying that constraining regional lithology is …
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Seismic Studies of Subducted Lithosphere Beneath Fiji: Evidence for a Petrologic Anomaly
… VS) beneath the Tonga subduction zone where cold lithosphere is subducting rapidly at 200 mn/yr. Under these conditions, the lack of prominent anomalies of high VP and VS in the lower mantle implies that a large amount of recently subducted material remains above the lower mantle. This inference …
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Inferring the Thermomechanical State of the Lithosphere Using Geophysical and Geochemical Observables
… in terms of the thermomechanical state of the lithosphere. In Chapter 1, I correlate lower crustal rheology with seismic wave speed. Compositional variation is required to explain half of the total variability in predicted lower crustal stress, implying that constraining regional lithology is …
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Flexure of the oceanic lithosphere in the vicinity of the Marquesas Islands
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1992.
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Seismic and numerical constraints on the formation and evolution of ocean lithosphere
… aspects of the basic structure of oceanic lithosphere that are shaped by the processes that form the lithosphere. The strength of lithospheric plates relative to the underlying mantle enables the surface plate motions and plate boundary processes that characterize plate tectonics on Earth. …
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Modeling the Thermal and Chemical Evolution of the Martian Lithosphere Over Time
… thermal and petrologic history of the martian lithosphere. We developed a model that calculates the thermal state and melt composition of Mars over time. This model provides insight into the planet's history and enables us to describe how the density and seismic properties have evolved over …
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