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 34 for “"transform fault"”.
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Seismicity and structure of the Orozco transform fault
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Science, 1982.
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Earthquake source parameters, seismicity, and tectonics of the oceanographer transform fault
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Science, 1982.
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Seismicity and structure of the Orozco transform fault from ocean bottom seismic observations
… activity and crustal structure of the Orozco transform fault. Most of the data were collected by a network of 29 ocean bottom seismometers (OBS) and hydrophones (OBH) which were deployed as part of project ROSE (Rivera Ocean Seismic Experiment). Additional information is provided by magnetic …
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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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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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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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Tectonic evolution of the Western Limassol Forest Complex, Cyprus
… involving the development of a transtensional transform fault zone and an extensional relay zone that off-set to the south, sinistral transform movement along the Arakapas fault belt. Comparison of the WLFC with a transpressional palaeo-transform fault preserved in the Antalya complex of Turkey …
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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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Imaging of the Hellenic subduction zone by seismic tomography
… the Central Hellenic Shear Zone and Kephalonia Transform Fault, with slab more pronounced in southern part of the system. Our study supports the hypothesis of the change in subduction mode between northern and southern part of Hellenic arc in late Pliocene.
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The tectonic evolution of the Eastern Limassol Forest Complex, Cyprus
… of the Troodos Massif by an east-west trending fault zone, the Arakapas Fault Belt, which earlier studies suggest formed the northern wall of an oceanic transform fault. Transform-related structures are identifiable in the northern part of the ELFC, and volcaniclastic turbiditic sediments …
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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 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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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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Space-time rupture properties of large earthquakes
… to the high-frequency, mainshock for two oceanic transform fault events. Both the 1994, M, 7.0, Romanche and 1997, M, 6.8, Prince Edward Island events show clear time-domain evidence for episodes of smooth moment release that preferentially radiated energy at low frequencies. Inversions for the …
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The Geology of the Arakapas Fault Belt Area Troodos Massif, Cyprus
… Here the geology of an east-west striking fault zone in the southern part of the massif, the Arakapas Fault Belt (APB), is investigated and evidence is presented which supports its interpretation as a fossil transform fault. The Arakapas Fault Belt area had a trough-like morphology during …
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Structure and Accretion at Mid-Ocean Ridges With High Magma Supply: Perspectives From Seafloor Escarpments and Iceland
… rotations of crustal blocks within a migrating transform fault zone in North Iceland that may exhibit similar kinematics to other oceanic transforms.</p>
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Mineralogical, textural, and paragenetic studies of selected ore deposits of the Southeast Missouri lead-zinc-copper district and their genetic implications
… Missouri. This fracture zone may represent a transform fault, an epicenter trend, and a distinct, first-order lineament” --Abstract, pages xxiv-xxv.</p>
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The isotope geochemistry of abyssal peridotites and related rocks
… This is the best demonstration to date of a transform fault effect on basalt compositions. In trying to quantify putative transform fault effects documented at other fracture zones, no systematic correlation of transform offset age with mantle temperature change can be found, suggesting that …
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