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 24 for “"Transform faults"”.
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Earthquake behavior and structure of oceanic transform faults
Oceanic transform faults that accommodate strain at mid-ocean ridge offsets represent a unique environment for studying fault mechanics. Here, I use seismic observations and models to explore how fault structure affects mechanisms of slip at oceanic transforms. Using teleseismic data, I find that …
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Earthquake behavior and structure of oceanic transform faults
Oceanic transform faults that accommodate strain at mid-ocean ridge offsets represent a unique environment for studying fault mechanics. Here, I use seismic observations and models to explore how fault structure affects mechanisms of slip at oceanic transforms. Using teleseismic data, I find that …
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Slip on ridge transform faults : insights from earthquakes and laboratory experiments
… simple tectonic environment of mid-ocean ridge transform fault (RTF) seismicity provides a unique opportunity for investigation of earthquake and faulting processes. We develop a scaling model that is complete in that all the seismic parameters are related to the RTF tectonic parameters. …
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Slip on ridge transform faults : insights from earthquakes and laboratory experiments
… simple tectonic environment of mid-ocean ridge transform fault (RTF) seismicity provides a unique opportunity for investigation of earthquake and faulting processes. We develop a scaling model that is complete in that all the seismic parameters are related to the RTF tectonic parameters. …
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Earthquake source parameters, seismicity, and tectonics of North Atlantic transform faults
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1983.
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The dynamics of oceanic transform faults : constraints from geophysical, geochemical, and geodynamical modeling
Segmentation and crustal accretion at oceanic transform fault systems are investigated through a combination of geophysical data analysis and geodynamical and geochemical modeling. Chapter 1 examines the effect of fault segmentation on the maximum predicted earthquake magnitude of an oceanic …
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The dynamics of oceanic transform faults : constraints from geophysical, geochemical, and geodynamical modeling
Segmentation and crustal accretion at oceanic transform fault systems are investigated through a combination of geophysical data analysis and geodynamical and geochemical modeling. Chapter 1 examines the effect of fault segmentation on the maximum predicted earthquake magnitude of an oceanic …
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Transform Faults, Fracture Zones, and the Kinematics of Horizontal Thermal Contraction of Oceanic Lithosphere
… and dissipated by young oceanic lithosphere. Transform faults provide the necessary free boundaries across which most of the contractional stresses can be dissipated by ridge-parallel contraction of the oceanic lithosphere. The strike of the transform faults, earlier predicted to be parallel …
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Provenance and tectonic significance of the Lower Paleozoic Douglas Conglomerate, northern Churchill Mountains, Antarctica
… the craton but subsequently were dispersed along transform faults; Petrographic analyses suggest a recycled orogen provenance for the Douglas Its depositional basin may have developed within a fold-and-thrust belt or along an active transform fault. Subsequent tectonism dismembered the formation, …
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ΧΑΡΑΚΤΗΡΙΣΤΙΚΕΣ ΠΑΡΑΜΕΤΡΟΙ ΣΕΙΣΜΙΚΗΣ ΠΗΓΗΣ ΜΕ ΤΗ ΜΕΘΟΔΟ ΤΗΣ ΑΝΤΙΣΤΡΟΦΗΣ ΤΩΝ ΚΥΜΑΤΩΝ ΧΩΡΟΥ: ΕΛΛΑΔΑ ΚΑΙ Η ΕΥΡΥΤΕΡΗ ΠΕΡΙΟΧΗ ΤΗΣ
… RAPTURE PROCESS COMPARED TO THE ONES DUE TO TRANSFORM FAULTS AND DURATION OF THE SOURCE CLOSE TO 10 SEC. EARTHQUAKES AT DEPTHS MORE THAN 25 KM ARE IMPULSIVE IN THEIR RAPTURE PROCESS. THE COMPUTED AVERAGESTRESS DROP IS AT LEAST ONE ORDER OF MAGNITUDE LESS THAN THE STRESS DROP CALCULATED FOR …
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The evolution of lithospheric deformation and crustal structure from continental margins to oceanic spreading centers
… of fault development are identified: Mode C faults that initiate near the center of a segment and Mode E faults that initiate at the segment ends. Numerical results from Ch. 5 predict that over time scales longer than a typical earthquake cycle transform faults behave as zones of significant …
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The evolution of lithospheric deformation and crustal structure from continental margins to oceanic spreading centers
… of fault development are identified: Mode C faults that initiate near the center of a segment and Mode E faults that initiate at the segment ends. Numerical results from Ch. 5 predict that over time scales longer than a typical earhquake cycle transform faults behave as zones of significant …
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Characteristics of active deformation, fault interaction, and earthquake triggering in a rapidly-deforming complex normal fault network (south-west Türkiye)
… earthquakes on subduction zones and continental transform faults, normal faulting earthquakes frequently cause severe destruction and casualties. Understanding earthquake occurrence and determining those faults most at risk of rupturing in destructive earthquakes is crucial to prevent disasters. …
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Oceanic lithosphere magnetization : marine magnetic investigations of crustal accretion and tectonic processes in mid-ocean ridge environments
… the slow-spreading Mid Atlantic Ridge with Kane Transform Fault. Marine magnetic anomalies and magnetic properties of seafloor samples are combined to characterize the magnetic source layer in both locations. The EPR study suggests that along-axis variations in the observed axial magnetic anomaly …
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Oceanic lithosphere magnetization : marine magnetic investigations of crustal accretion and tectonic processes in mid-ocean ridge environments
… the slow-spreading Mid Atlantic Ridge with Kane Transform Fault. Marine magnetic anomalies and magnetic properties of seafloor samples are combined to characterize the magnetic source layer in both locations. The EPR study suggests that along-axis variations in the observed axial magnetic anomaly …
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Oblique Seafloor Spreading, the Malpelo Plate Hypothesis, and Cocos-Nazca-Pacific Plate Motion Circuit
… multi-resolution topography, we estimate new transform-fault azimuths along the eastern Cocos-Nazca plate boundary and show that the direction of relative plate motion is 3.3° ±1.8° (95% confidence limits) clockwise of prior estimates. The new direction of Cocos-Nazca plate motion is, …
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The Mechanisms and Triggering of Earthquakes in the Ridge-Transform Environment
… mainly located on the NW-SE striking oceanic transform faults that delineate the plate boundary. In addition, we calculate regional moment tensors for ~30 of these events, and find that the majority are right-lateral strike-slip events consistent with observed transtensional plate motion. …
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Tectono-stratigraphic evolution of the offshore Benin Basin, SW Nigeria
… There is no evidence in these sequences for transform-related tectonics. Several short-lived episodes of contractional deformation probably occurred from late Aptian/early Albian to Cenozoic, with the Cretaceous events studied in detail in this thesis. The localised late Aptian/early Albian …
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Modeling of the great earthquake seismic cycles
… can be also extended to the case of continental transform faults and for the advanced 3D modeling of specific subduction zones. This will require further development of numerical techniques and adaptation of the existing advanced highly scalable parallel codes like LAMEM and ASPECT.
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Insight from thermochronology, magnetotellurics, and structural analysis into the tectonic evolution of the Ozark Dome-Illinois Basin region, Midcontinent USA
… and thus may have originated as Proterozoic transform faults. A study focused on the IB/OD boundary (Chapter 3), incorporating new field structural analysis and the production of a high-resolution structure-contour map, together with a review of literature concerning Midcontinent …
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