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 27 for “"crustal deformation"”.
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Estimating crustal deformation from geodetic data
… analysis of geodetic measurements in active deformation regions represents therefore one of the most important tool in the study of crustal deformation over different temporal scales [e.g., Dixon, 1991]. This dissertation focuses on motion that can be observed geodetically with classical …
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Crustal deformation and geodetic site stability determination using GPS
Bibliography: p. 160-167.
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Global positioning system measurement of crustal deformation in central California
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1992.
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Present day plate boundary deformation in the Caribbean and crustal deformation on southern Haiti
<p>The Caribbean plate and its boundaries with North and South America, marked by subduction and large intra-arc strike-slip faults, are a natural laboratory for the study of strain partitioning and interseismic plate coupling in relation to large earth- quakes. In this work, I use the available …
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Crustal deformation source monitoring using advanced InSAR time series and time dependent inverse modeling
Crustal deformation can be the result of volcanic and tectonic activity such as fault dislocation and magma intrusion. The crustal deformation may precede and/or succeed the earthquake occurrence and eruption. Mitigating the associated hazard, continuous monitoring of the crustal deformation …
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Present-day and late Quaternary crustal deformation along the southern Dead Sea Fault System, Jordan
… models of the earthquake cycle predict that crustal rheology may lead to differences between short-term crustal deformation rates (decadal time scales) and long-term fault slip rates (Holocene to late Pleistocene time scales). This study investigates fault kinematics along the southern Dead …
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Seismic characterization of fractured reservoirs (part I) ; Crustal deformation in the Tibetan Plateau (part II)
… plateau and the basic processes that control its deformation. A 3-D, large-scale analytical model is used to model continental crustal deformation in the Tibetan plateau. The idealized crust is assumed to consist of two layers, an upper layer with a uniform viscosity and a lower layer with …
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Receiver function study in northeast Tibet and adjacent boundaries
… boundaries (LAB). The average crustal thickness is about 50km for the northeastern corner of the Tibetan plateau. The deepest Moho is found along the Kunlun Fault zone in the northern Tibetan plateau. We also observed the presence of a double Moho phase in this region which …
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Elastic and viscous anisotropy in Earth's mantle : observations and implications
… angles: I use seismic anisotropy to detect deformation in the mantle, and I demonstrate the importance of accounting for rheological anisotropy in mantle flow models. The observations of seismic anisotropy in the Earth's interior allow geophysicists to probe the direction and mechanism of …
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Dynamic links between short-term deformation and long-term tectonics: a finite element study
… REQUEST.] Geodetic and geological data for crustal deformation are significantly different in many places. This discrepancy may indicate different strain rates in the geological past, or simply reflect the timescale-dependent behavior of fault movement. By using 2-D and 3-D finite element …
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Thermal Structure of Mid-Crustal Shear Zones
… examination of the kinematics associated with crustal deformation. This thesis expands on the current knowledge of the kinematic evolution of the Himalayas and Scottish Caledonides, by examining samples from the Main Central Thrust (MCT) (Himalayas) and the Sgurr Beag Thrust (SBT) (Scottish …
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High temperature deformation mechanisms and strain heterogeneities in calcite rocks
… zones. Such marble sequences play a key role in crustal deformation processes. Despite extensive field and laboratory investigation, many questions remain concerning the mechanical behavior of these rocks. For example, the mechanical behavior of different limestones and marbles differ greatly, …
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Multiscale Integration of Empirical Geologic Observations with Quantitative Structural Modeling to Constrain Late Cretaceous to Eocene Paleostress Environments on the Colorado Plateau
Relating crustal deformation to stress conditions has long been a subject of interest to the geologic community as rock failure has important implications for storage and extraction of petroleum and mineral deposits, as well as sequestration efforts. The ability to relate patterns of rock …
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A study of the structure of the Belgian crust by Moho determination and local seismic tomography
… is known about the extension of the different crustal structures into the middle and lower crust. Until now, only seismic profiles and gravimetric and magnetic data gave some insights. The general aim of this thesis is to improve the understanding of the lower/middle crustal structure of …
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EASTERN BASIN AND RANGE CRUSTAL EXTENSION: A VIEW FROM SEISMOLOGY AND GEODESY
This dissertation investigates the crustal structure of the eastern Basin and Range Province in the western United States and its relationship with the present-day extensional regime governing this region. The use of combined results from different geophysical methods provide a better understanding …
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Earthquakes in complex fault settings: Examples from the Oregon Cascades, Eastern California Shear Zone, and San Andreas fault
The surface expression of upper crustal deformation varies widely based on geologic settings. Normal faults within an intra-arc basin, strike-slip faulting within a wide shear zone, and creeping fault behavior all manifest differently and require a variety of techniques for analysis. In this …
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Controls on the diversity of the fault slip styles at the brittle-ductile transition: examples from the Cape Fold Belt, Nuy Valley, South Africa
Crustal deformation models have a first-order rheological division, with pressure-dependent brittle deformation predominating at shallow depths, and temperature-dependent viscous deformation occurring in the deeper levels of the crust. The brittle-ductile transition zone separates these two …
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The roof of the cyclades : a structural, stratigraphic, and paleomagnetic study of Neogene extensional tectonics in Central Greece
… observations to address the record of Neogene crustal deformation in the Central Aegean region, thereby providing new constraints on the overall geometric and tectonic evolution of an extensional system that is largely governed by the dynamics of a retreating subducting slab. I document a …
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Observing Drought-Induced Crustal Loading Deformation Around Lake Mead Region via GNSS and InSAR: A Comparison With Elastic Loading Models
… technology. In this study, I analyze vertical deformation observations from GNSS sites and multi-temporal InSAR analysis of Sentinel-1A/B to investigate the contribution of water mass changes in lake, soil, and groundwater to the deformation signal. To achieve this, I remove the effects of …
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Observações geodésicas multi-sensores aplicadas para caracterização de secas e monitoramento de massa hidrológica
… (CCDI), Drought Severity Index (DSI), Vertical Crustal Deformation Index (DIVCD) e o SPI em múltiplas escalas (03, 06, 12, 24 e 36 meses) afim de melhor entender e caracterizar os diversos tipos de seca que a região se encontra suscetível de ocorrer. Os resultados encontrados mostram fortes …
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