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 “"Geological structure"”.
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ΤΕΧΝΙΚΟΓΕΩΛΟΓΙΚΗ ΕΡΕΥΝΑ ΕΥΡΥΤΕΡΗΣ ΠΕΡΙΟΧΗΣ ΑΤΑΛΑΝΤΗΣ
… OF SUBJECTS OF THE GEOSCIENCES CONNECTED TO THE GEOLOGICAL STRUCTURE, THE SEISMOTECTONIC (WITH SOME ELEMENTS OF THE SEISMIC HAZARD), THE HYDROGEOLOGICAL CONDITIONS, THE CONSEQUENCES OF SOME ACTIVITIES ON THE ENVIRONMENT (PARTICULARLY ON THE POLLUTION OF UNDERGROUND WATER) AND THE GEOTECHNICAL …
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ΓΕΩΛΟΓΙΚΗ ΔΟΜΗ ΚΑΙ ΓΕΩΔΥΝΑΜΙΚΗ ΕΞΕΛΙΞΗ ΤΗΣ ΟΡΟΣΕΙΡΑΣ ΤΟΥ ΚΟΖΙΑΚΑ (ΔΥΤΙΚΗ ΘΕΣΣΑΛΙΑ)
THE OBJECT OF EXAMINATION IS THE GEOLOGICAL STRUCTURE OF THE KOZAKAS RANGE, WHICH IS CONSTRUCTED MAINLY BY FORMATIONS OF THE WESTERN THESSALY UNIT, AGED UPPERTRIASSIC-MIDDLE-UPPER EOCENE. AFTER STUDIES ON THE LITHOSTRATIGRAPHY TECTONIC,STRUCTURE AND DEFORMATION, THERE HAS BEEN CONFIRMED THAT DURING …
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The geology of China
… V Igneous rocks in China. Chapter VI General geological structure of China. Chapter VII The geological history of China. SECTION III Economic geology Chapter VIII The economic aspect of Chinese geology. A. Coal fields. B. Oil fields. C. Ore deposits. D. Underground water. E. Miscellaneous …
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Active tectonics and earthquake hazards in continental mountain ranges and foreland basins
… produce large earthquakes, and the underlying geological structure amplifies the resulting ground shaking. The aim of this dissertation is to investigate the regional-scale controls on earthquake ground motions and seismic hazard in these settings. The first part of this dissertation describes …
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ΓΕΩΛΟΓΙΚΕΣ ΚΑΙ ΥΔΡΟΓΕΩΛΟΓΙΚΕΣ ΣΥΝΘΗΚΕΣ ΤΗΣ ΠΕΡΙΟΧΗΣ ΤΟΥ ΤΟΠΟΓΡΑΦΙΚΟΥ ΦΥΛΛΟΥ "ΜΟΧΟΣ" (ΚΕΝΤΡΟΑΝΑΤΟΛΙΚΗ ΚΡΗΤΗ)
THIS THESIS DEALS WITH THE GEOLOGICAL AND HYDROLOGICAL CONDITIONS OF THE AREA COVERED BY THE TOPOGRAPHIC SHEET "MOCHOS" (SCALE 1 : 50,000), AT THE CENTRAL-EASTERN CRETE. THE GEOTECTONIC UNITS CONTRIBUTING TO THE GEOLOGICAL STRUCTURE OF THE STUDY AREA ARE: A) CRETA-MANI UNIT (IDI ZONE OR TALEA ORI …
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Kirchhoff Common Offset Migration Velocity Analysis via Differential Semblance
… the image that represents the true underground geological structure: major evidence to explore for potential reservoirs and indicate hydrocarbons. This method optimizes a differential measure of the image gather flatness by comparing the residual moveout between neighboring traces. It stands out …
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P- and S- wave tomography of the crust and uppermost mantle in China and surrounding areas
This thesis involves inverting the seismic structure of the crust and uppermost mantle in China from the P- and S-wave travel-time tomography. The main contributions of this research are: 1) introducing the adaptive moving window method to obtain 2338 1D P and S models in China; 2) introducing a …
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Geomorphology of the Cape Peninsula
… the relationship between the underlying geological structure and present landforms, together with the strong structural and directional control which is manifested within the study area. Present drainage patterns are examined, whilst the role played by running water and the sea in …
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Controls on earthquake rupture and triggering mechanisms in subduction zones
… of M ≥ 7.5 earthquakes with fore-arc geological structure suggests that long-lived frictional heterogeneities (asperities) are primary controls on the rupture extent of large earthquakes. To determine when and where stress is accumulating on the megathrust that could cause one of these …
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Controls on earthquake rupture and triggering mechanisms in subduction zones
… of M 7.5 earthquakes with fore-arc geological structure suggests that long-lived frictional heterogeneities (asperities) are primary controls on the rupture extent of large earthquakes. To determine when and where stress is accumulating on the megathrust that could cause one of these …
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Curve sampling and geometric conditional simulation
… resonance (MR) images, brain MR images, and geological structure estimation using surface gravity observations. We generalize our basic curve sampling framework to perform conditional simulation: a portion of the solution space is specified, and the remainder is sampled conditioned on that …
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Sub-Ice Relief and Geology of East Antarctica
… assessed results of previous geophysical and geological investigations, has allowed some interpretation of the geological structure and glacial history of East Antarctica. A comparison of the relative and absolute accuracy of radio echo sounding results and seismic-gravity data in East …
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Adapting Seismic Processing Techniques for Data Preconditioning in Radar Imaging of Highly Dissipative and Dispersive Media
… of specific portions of the earth’s subsurface geological structure. The overall objective of this thesis is to produce more accurate microwave breast images from ultra-wideband radar signals by adapting advanced seismic imaging techniques. First, we develop a method based on first-breaks to …
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New technologies for unconventional reservoir characterization: Seismic inversion, focal-time estimation, and signal processing to improve reservoir imaging
… to map and understand the relationship between geological structure and induced seismic events. Constraints obtained from full-waveform inversion provide detailed information about the properties of the Duvernay Formation itself, such as brittle and ductile facies. Accurate microseismic …
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Investigation of changes in permeability due to poro-thermo-elastic effects in enhanced geothermal reservoirs
… map of three formations. For this purpose, a geological structure is reconstructed according to its past tectonic history. Then fractures are stochastically simulated using Gaussian simulation. After generating the subsurface fracture map, the fluid flow is simulated using finite element …
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Informing Code-Compliant Site-Specific Infrastructure Seismic Evaluations With Physics-Based Simulated Ground Motions
… the characteristics of fault rupture, geological structure, and topography are therefore becoming a fundamental resource to support structural design and advance understanding of seismic risk. However, technical guidance on their correct use in engineering applications is yet to be …
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Pressure estimation using time-lapse seismic in compacting reservoirs
… has not been properly drained. The impact of geological structure and gas saturation on the technique is assessed. Strong thickness variations within the reservoir interval increase the errors on the pressure prediction. This is mitigated if relative values instead of absolute values are used …
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The Thermal and Fluid Environment of the Cascadia Subduction Zone, Southern Washington State
… a 3-D view of the Cascadia margin thermal structure by interpreting 40,232 individual BSR data points in terms of temperature and heat flow. Localized differences between BSR heat flow and numerical models reflect an estimated regional mean upward fluid flow of 0.53 cm yr-1 for the survey …
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A comparison of proxies for seismic site conditions and amplification for the large urban area of Santiago de Chile
… data shows significant dependence on the local geological structure with regards to amplitude and duration. Moreover, the analysis of noise spectral ratios shows that they can provide a lower bound in amplitude for site amplification and, since no variability in terms of time and amplitude is …
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Seismic Tomography at Volcanic Rift Zones and Transpressional Plate Boundaries Askja Caldera and Macquarie Island
… consists of two main parts: imaging the seismic structure beneath Askja caldera, Iceland, located in a divergent tectonic setting, and Macquarie Island, south-west Pacific, that sits within an intra-oceanic transpressive regime. For decades, the presence or absence of a shallow magma body beneath …
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