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 “"strike-slip faulting"”.
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Structural Analysis of Ernst Tinaja Canyon Focusing on Strike-Slip Faulting and Folding, Big Bend National Park, Texas
… faults and a previously unmapped, large dextral strike-slip fault, with associated negative flower structure. Theories for the mechanisms and kinematics of deformation are discussed and a model is presented for the overall tectonic history of the area based on field evidence. Orientations of …
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The 2014-15 Bárðarbunga-Holuhraun magmatic rifting episode: A seismic study
… mechanism during the collapse to be steep normal faulting, with sub-vertical P-axes, striking sub-parallel to the caldera rim. The northern and southern sides of the caldera, however experienced very different seismicity rates, highlighted by the order of magnitude difference in the cumulative …
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A structural and geochemical traverse across the NW outcrop of the Colenso Fault Zone, Saldanha, South Africa
… Suite, followed by formation of aplite veins and strike-slip faulting generating cataclasites. The initial strike-slip sense of movement along the fault was sinistral, followed by dextral strike-slip shearing and finally late stage jointing. The Colenso Fault Zone is host to 3 large zones of …
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Duality of magmatism at Kirkland Lake, Ontario, Canada.
… in extensional fractures associated to sinistral strike-slip faulting. Uplift of domain 3 and reverse faulting along the Kirkland Lake main break (KLMB) and the LLF are associated with a later transpressive phase; it was during this phase that gold deposits were formed. The structural, …
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Tectonic evolution of Pegasus Basin and the Hikurangi Trench, offshore New Zealand, The
… of the North Island of New Zealand, and the strike-slip faulting that dominates the majority of the South Island of New Zealand. The transition from this strike-slip zone into the actively subducting Hikurangi Trench requires a significant translation of plate motion from margin parallel to …
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Multiscale determination of in situ stress and fracture properties in reservoirs
… minimum horizontal stress). This suggests strike-slip faulting, consistent with earthquake mechanisms in the region. The in situ stresses play an important role on determining the properties of fractured formation. The azimuth of SHmax determines the preferred orientation of open fractures. …
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Deciphering the Tectonics of the Caucasus from Post-Collisional Volcanism
… is ruled out because of tectonic constraints. Strike-slip faulting, the result of a tectonic regime shift at 5 Ma, determined the location of volcanoes. Although the style of post-collisional magmatism may not be characteristic of all continental collision zones, where present it has a high …
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Cenozoic evolution of the Pamir Salient; timing, mechanisms and paleo-environmental impacts : constraints from the Aertashi section, western Tarim Basin
… initiation of Pamir indentation. Activation of strike slip faulting, growth strata and exhumation along the Kashgar-Yecheng Transfer System is evidenced in the Aertashi region which may be linked to a pull-apart basin. By ~18.5 Ma, the onset of northward thrusting of the Kunlun hinterland and …
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Seismic Characterization of Faults from 3-D Seismic Data: Fault Detection, and Characterization of the Bakken Formation
… a seismic discontinuity volume such as dip and strike, density, displacement, and rose diagrams to characterize faults from 3D seismic data in the Bakken Formation. I use principal component analysis (PCA) for automatic fault detection. The PCA fault attribute indicates significantly different, …
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REVISED STRATIGRAPHIC AND TECTONIC EVOLUTION OF THE SAN FRANCISCO RIDGE; AN EMERGING PUSH-UP STRUCTURE IN THE NORTHEAST DOMINICAN REPUBLIC
… San Francisco Ridge is bounded by left-lateral strike-slip faults associated with the Septentrional Fault System. In this regard, the Septentrional Fault represents a major fracture in the northeast of the Hispaniola Island and separates an uplifted oceanic crust represented by the Cordillera …
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Geologic Mapping along the Benton Spring Fault, Nevada: Dextrally-offset Tuff-filled Paleovalleys in the Central Walker Lane
… for characterizing the forces which drive faulting across the U.S. Cordillera. Within the Cordillera, the Walker Lane, characterized by active intracontinental faults, straddles the western edge of the Basin and Range Province and the eastern edge of the Sierra Nevada. In the Gabbs Valley …
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Micro-seismic observations in Leeu Gamka, Karoo, South Africa
… satellite imagery. The focal mechanisms display strike-slip faulting with the fault plane likely in a NW - SE orientation, consistent with the distribution of the earthquakes. The velocity model was tested by varying the thickness of the Karoo supergroup to investigate the sensitivity of the …
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Structure, evolution, and petroleum potential of the Queen Charlotte Basin
… Their crosscutting relationships, lack of strike-slip displacements, and presence of through going Oligocene dikes, all preclude substantial strike-slip movements in the basin during the Neogene. The origin of the basin by large extension and strike-slip faulting is ruled out; a model based …
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Geomechanical Stability Analysis for Co2 Sequestration in Carbonate Formation
… formations during CO2 sequestration. One is the faulting induced by pore-pressure buildup, and another is the compaction failure because of rock quality deterioration due to exposure to CO2 enriched solution.</p><p>Fracture toughness measurements on limestone and shale suggest that the fracture …
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SEISMIC VELOCITY, RADIAL ANISOTROPY IN THE CRUST AND UPPER MANTLE OF NORTHEASTERN TIBETAN PLATEAU FROM SURFACE WAVE TOMOGRAPHY
… interaction between mountain building and strike-slip faulting is a prime site to study the growth of the plateau and to understand the dynamic processes at its boundaries. This dissertation research investigates the crust and upper mantle structure in the NE Tibetan Plateau using surface …
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An Analysis of Focal Parameters with Application to West Texas Micro-Earthquakes
… initial P-wave polarities and reflect normal and strike-slip faulting. The resolved fault strikes vary from NW-SE in the southwest of the study area to E-W in the south and southeast and NE-SW in the northeast. Although focal mechanisms agree with current tectonic stress in west Texas, the …
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Earthquakes in complex fault settings: Examples from the Oregon Cascades, Eastern California Shear Zone, and San Andreas fault
… 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 dissertation I studied three different actively deforming regions across a variety of …
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Geology of the Zacapa Quadrangle and vicinity, Guatemala, Central America
… folds with wavelengths up to 1 km. Foliations strike NSOE, oblique to the Motagua trend, and linear structural elements plunge southwest between 7 degrees and 35 degrees. There are no known correlatives of the Las Ovejas Complex north of the Motagua fault zone.</p> <p>Plate convergence during …
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