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 62 for “"tectonic history"”.
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The origin and tectonic history of the Southwest Philippine Sea
This thesis is a collection and analysis of seafloor magnetic anomalies, bathymetry, and the paleomagnetism of DSDP sediments and basalt in the West Philippine Basin, in an attempt to resolve questions about its origin as a marginal basin. Our results suggest that this basin was formed in an Eocene …
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The origin and tectonic history of the Southwest Philippine Sea.
Thesis. 1976. Ph.D.--Massachusetts Institute of Technology. Dept. of Earth and Planetary Sciences.
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Tectonic history of Billings and southern McKenzie Counties, southwestern North Dakota
… analysis were used to identify episodes of tectonic activity within the area. </p><p> Although the subsidence of the Williston Basin was the principal regional tectonic activity, the structural features in Billings and McKenzie Counties were intermittently decoupled from the larger-scale …
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Strain in Ordovician and Devonian shales from the Massanutten Synclinorium: implications for fold development and tectonic history
Syntectonic chlorite pressure fringes on framboidal pyrites record strain in Ordovician and Devonian shales from the Massanutten synclinorium. Total strains display no systematic relation to minor or major structures. Strain histories are related to the development of minor, rather than regional, …
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Extensional tectonic history of the Rhodope metamorphic core complex, Greece, and geophysical modeling of the Halloran Hills, California
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1995.
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Stratigraphy and tectonic history of the Mesaverde group (Upper Cretaceous), east flank of the Rock Springs uplift, Sweetwater County, Wyoming
Includes bibliographical references (pages 176-188).
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Cenozoic stratigraphic and tectonic history of the Grenada and Tobago basins as determined from marine seismic data, wells, and onland geology
… thesis presents an integrated stratigraphic and tectonic evolution of the Grenada and Tobago basins using multi-channel seismic data collected in May, 2004, (BOLIVAR cruise), along with GULFREX seismic data collected by Gulf Oil Company in 1975. These reflection data, combined with UTIG OBS …
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Volcano-tectonic history and volcanic hazard assessment of the 22.5-29°S segment of the Central Volcanic Zone of the Andes
… integrating temporal and spatial variability in tectonic and magmatic processes. In this study, I investigate new approaches to quantify the hazards of such long-term active and complex settings, using the example of the 22.5-29°S segment of the Central Volcanic Zone (CVZ) of the Andes. This zone …
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New Insight Into the Thermal-Tectonic History of the Southern Antarctic Peninsula: (U-Th-Sm)/He and Fission-Track Thermochronologic Results From Northwest Palmer Land and Alexander Island
<p>This study examines the thermal history of the southern Antarctic Peninsula through the application of thermochronometry, and presents the first high-resolution thermochronologic dataset for arc rocks of northwest Palmer Land. I present 19 new thermochronologic ages obtained via (U-Th-Sm)/He and …
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The relationship between active faulting and fluvial geomorphology: a case study in the Gediz Graben, Turkey.
Identifying tectonically active faults and quantifying rates of movement is a key challenge in the Earth Sciences, in addition to this the interactions between active faulting and the landscape, specifically involving the fluvial network, is a relatively new area of study. Previous work has …
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The Lower Carboniferous (Chadian-Brigantian) geology of shallow marine carbonate rocks in the central and southeast Irish Midlands and the Wexford Outlier
… difference in the style of sedimentation and tectonic history between the basins in the Irish Midlands and the Wexford Outlier."--Abstract, page iii.
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Seismic and numerical constraints on the formation and evolution of oceanic lithosphere
… plate boundary processes that characterize plate tectonics on Earth. Surprisingly, we have a relatively poor understanding of the physical mechanisms that make the lithosphere strong relative to the asthenosphere, and we lack a reference model for ordinary lithospheric structure that can serve as …
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Mesoproterozoic Basement From The Central And Southern Appalachians Reveal High-temperature Magmatic Conditions And Non-laurentian Origin Of Earth’s Most Zircon Fertile Magmas
… here is to better our understanding of the tectonic history of southeastern Laurentia during the Mesoproterozoic (Chapter 1), to investigate the potential link between Laurentia and Amazonia during the formation of Rodinia (Chapter 2), and to elucidate the tectonic processes responsible for …
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Mesoproterozoic Basement From the Central and Southern Appalachians Reveal High-temperature Magmatic Conditions and Non-laurentian origin of Earth's Most Zircon Fertile Magmas
… here is to better our understanding of the tectonic history of southeastern Laurentia during the Mesoproterozoic (Chapter 1), to investigate the potential link between Laurentia and Amazonia during the formation of Rodinia (Chapter 2), and to elucidate the tectonic processes responsible for …
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Seismic and numerical constraints on the formation and evolution of ocean lithosphere
… plate boundary processes that characterize plate tectonics on Earth. Surprisingly, we have a relatively poor understanding of the physical mechanisms that make the lithosphere strong relative to the asthenosphere, and we lack a reference model for ordinary lithospheric structure that can serve as …
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Testing models of ultra-fast India-Asia convergence : new paleomagnetic results from Ladakh, Western Himalaya
… the Kohistan-Ladakh Arc (KLA), an intermediate tectonic unit currently situated between the converging Indian and Eurasian continents in Western Himalaya, would constrain the tectonic history and dynamics of Himalayan orogenesis. We present new paleomagnetic data from the Khardung volcanic rocks …
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Polyphase Proterozoic tectonometamorphic history of the Taos Range, northern New Mexico
… New Mexico preserve components of a protracted tectonic history involving pre-1.7 Ga, 1.65 Ga, 1.4 Ga, and possible 1.1 Ga tectonism. The southern Taos Range is a 1.76 – 1.7 Ga volcano-plutonic complex with tectonically interlayered remnants of the Hondo Group. Similar rock types are exposed in …
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Structure and Accretion at Mid-Ocean Ridges With High Magma Supply: Perspectives From Seafloor Escarpments and Iceland
… uncertain about specific details of magmatic and tectonic processes beneath these divergent plate boundaries and how these processes may vary along the spreading axis. Investigations that combine geologic relationships and magnetic properties continue to yield fundamental tools for understanding …
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Stream profiles as a proxy for uplift in the San Bernardino Mountains
… profile analysis provides new insight into the tectonic history of the San Bernardino Mountains of Southern California. The San Bernardino Mountains, along with the nearby San Gabriel Mountains, have been tectonically uplifted since the late Miocene due to transpression-related thrust faulting. …
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Structure and evolution of the Australian continent : insights from seismic and mechanical heterogeneity and anisotropy
… with age, but is dependent on the scale and the tectonic history of the region under consideration. I construct an azimuthally anisotropic three-dimensional model of the Australian upper mantle from Rayleigh-wave waveforms. I compare Bayesian inverse methods with discretely parameterized …
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