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 40 for “"strike-slip faults"”.
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Structural analysis of brittle deformation features along Grenvillian shear zones in southeastern Ontario
… highs in Paleozoic cover above the RLmz. Normal faults striking NW to WNW and ESE-striking dextral strike-slip faults in the RLmz and Paleozoic cover above both shear zones are compatible with Ordovician-Devonian Taconic and Acadian stresses. Prominent NNE- and NW-striking subvertical joint sets …
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A PALAEOMAGNETIC STUDY OF CRUSTAL ROTATIONS AND THEIR RELATIONSHIP TO THE TECTONICS OF THE ATACAMA AND DOMEYKO FAULT SYSTEMS, NORTHERN CHILE
… for palaeomagnetic analysis from within two strike-slip fault systems in northern Chile (25.4°S - 26.4°S); the Atacama Fault System in the Coastal Cordillera, and the Domeyko Fault System in the Andean pre-Cordillera. In the Coastal Cordillera, analysis of Middle Jurassic lavas (La Negra …
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Development and interaction of segmented fault systems
Faults in contractional and extensional settings have been studied, both during fieldwork and from interpretation of 2D and 3D seismic sections. Detailed analysis of the geometries of faults, with displacements of a few mm to 100's m, has provided insights into the development of fault networks. …
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Partitioning of fluid flow along faults and fractures in the Bristol Channel Basin: implications for low carbon geoscience projects in SW England
… slickenfibres within normal, thrust, and strike-slip faults in the East<br/>Quantoxhead and Kilve region of Somerset.<br/>Protracted N-S extension (ca. 150–120 Ma) formed normal faults, while subsequent NS shortening (ca. 50–20 Ma) involved (i) cross-cutting strike-slip faults, (ii) minor …
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Structural analysis of the valley and ridge extension of the Parsons Lineament
The Parsons Lineament (a major Appalachian Cross-strike Structural Discontinuity, CSD) extends from the Plateau of West Virginia into the Valley and Ridge Province in northern Rockingham County, Virginia. Regional and second—order folds change in strike from typical Central Appalachian trends …
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Evolution of tectonic and stratigraphic geometries in the Southern Outeniqua Basin
… based on the geographical position of these faults. Sequence stratigraphic analysis of the basin lead to the identification of seven secondorder unconformities which have been further defined into five main seismo-stratigraphic units. The variation in major structural orientations suggest the …
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Tectonic significance of the Atnarko complex, Coast Mountains, British Columbia
… to equivalent portions of the orogen along strike, indicates a post mid-Cretaceous change in structural style. To the northwest the orogen records continued southwest-directed compression which dominates the deformation style; while to the southeast large dextral strike-slip faults dominate. …
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Structural Geology of the Caddo Gap Area, Ouachita Mountains, Arkansas
… <p>Previously unmapped, northeast-trending strike-slip faults in the Arkansas Novaculite were discovered on the east-west “South Ridge” immediately south of and adjacent to the South Caddo Mountain fold. This style of faulting differs significantly from previous regional interpretations …
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Thermal and mechanical development of the East African Rift System
… fault system. These basins are linked by oblique-slip and strike-slip faults cross-cutting the rift valley. Faults bounding the Kenya and Western rift valleys delineate two north-south-trending, 40-75 km wide zones of crustal extension, and little or no crustal thinning has occurred beneath the …
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Thermal and mechanical development of the East African Rift System
… fault system. These basins are linked by oblique-slip and strike-slip faults cross-cutting the rift valley. Faults bounding the Kenya and Western rift valleys delineate two north-south-trending, 40-75 km wide zones of crustal extension, and little or no crustal thinning has occurred beneath the …
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Geology of part of the Inchelium Quadrangle, Stevens County, Washington
… time. The sedimentary rock units strike north and dip west. Mapping data delineates a large isoclinal syncline in the eastern half of the area, as well as small related chevron and drag folds. A large north-trending normal fault system cuts off part of the western limb of the …
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Structure of the Patagonian fold-thrust belt in the Magallanes region of Chile, 53° - 55° S Lat.
… present tectonic superposition of a left-lateral strike-slip plate margin defined by the Magallanes- Fagnano fault zone. In this dissertation, I present new geologic maps, cross sections and detailed macro- and microscopic structural analyses that describe the geometry and kinematic evolution of …
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Geologic mapping and zircon (U-Th)/He thermochronology of the Avawatz Mountains, California; Implications for the eastern terminus of the Garlock fault
… are located at the eastern tip of the left-slip Garlock fault where the fault intersects the NW-striking right-slip Southern Death Valley fault (SDVF). The Avawatz Mountains were constructed via late Cenozoic contractional deformation involving active thrust and/or oblique-slip faults. …
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Building Velocity Models for Steep-Dip Prestack Depth Migration through First Arrival Traveltime Tomography
… outside of sedimentary basins, such as major strike-slip faults, seismic reflectivity is often sparse and little is known of detailed subsurface geology. Alternate methods of velocity model construction must be used. First arrival (refraction and turning ray) traveltime tomography is proposed …
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Different styles of deformation of the fore-arc wedge along the Chilean convergent margin : insights from 3D numerical experiments
… starved trench. Two major margin parallel strike slip faults are observed in this area, the Atacama Fault Zone (AFZ) and the Precordilleran Fault System (PFS). Both strike-slip faults do not exhibit significant recent displacement. The southern study area (37° - 42°S), compared to the …
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Present day plate boundary deformation in the Caribbean and crustal deformation on southern Haiti
… 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 campaign and continuous GPS measurements in the Caribbean to …
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Structural style of the San Francisco Mountains, Sevier fold-thrust belt, Utah
… sheets that are overprinted by extensional faults, distorting correlations of geologic structures in the region. The Frisco thrust is exposed within the San Francisco Mountains in west-central Utah. Correlations with the better studied Canyon Range-Willard thrust to the north and the Wah Wah …
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Shear Wave Splitting Analyses in West Texas
… horizontal stress direction as well as the strikes of active normal faults, and the NW-SE fast direction is attributed to the NW trending strike-slip faults. The different combinations of the multiple faults may be the cause of other different fast directions. SWS results are unique in the …
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STRUCTURAL STYLE VARIATIONS IN THE HIMALAYAN FRONT: IMPLICATIONS FOR WEDGE-TOP DEPOSITION, NEPAL
… the most plausible features to explain the along-strike variation in structural style within the study area. From west to east these are: 1) the West Dang Transfer Zone (WDTZ), interpreted to be a complex zone of strike-slip faults and lateral ramps which may transfer strain to a deeper detachment …
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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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