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 18 of 18 for “"active tectonics"”.
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Active tectonics and seismicity of New Guinea
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1990.
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Active tectonics and earthquake hazards in continental mountain ranges and foreland basins
The regions adjacent to tectonically active mountain belts are exposed to significant earthquake hazard, since the range-bounding faults produce large earthquakes, and the underlying geological structure amplifies the resulting ground shaking. The aim of this dissertation is to investigate the …
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Geomorphic and thermochronologic signatures of active tectonics in the central Nepalese Himalaya
… this break in landscape morphology reflects active tectonic displacements at the foot of the Himalaya. The goals of the thesis are 1) to understand the degree to which landscape morphology can be used to delineate breaks in rock uplift in active orogens; 2) to characterize the neotectonics of …
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Alluvial river response to active tectonics in the Dehradun region, Northwest India: A case study of the Ganga and Yamuna rivers.
In environments characterised by active tectonics, it is widely accepted that river morphology will be affected by active fault displacement. For example, there is documented evidence of change in channel slope, channel width, channel braiding patterns, grain size distribution trends, and stream …
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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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Deformation, erosion and sedimentation in collisional orogens : case studies from eastern Tibet and southwestern China
This dissertation addresses aspects of the tectonics of regions adjacent to the eastern Himalayan syntaxis. The first chapter describes the Tertiary Gonjo basin, includes structural and sedimentologic observations, and interprets these as a record of limited upper crustal shortening during and …
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Numerical modelling and observations of nuclear-explosion coda wavefields
… areas could likely be related to younger and active tectonics. By contrast, when interpreted by using the traditional (Q₀, η) approach, the synthetic coda shows a strong and spurious frequency dependence with η ≈ 0.5, which is also similar to many published observations. Observed Lg codas from …
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Quaternary to recent drainage evolution of the Rambla de Lucainena, SE Spain
… strongly influenced by the unique climate and active tectonics of this semi-arid area. Fluvial incision during the Quaternary has left a series of terrace fragments from which four important terrace groups have been identified. This study has taken a unique approach by integrating the analysis …
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GEOCHEMISTRY OF LARGE EXPLOSIVE ERUPTIONS FROM THE MAIN ETHIOPIAN RIFT
… since Eocene-Oligocene. In this area, the active tectonics has repeatedly favoured magma ascent along the rift axis resulting in intense volcanic activity characterized by a wide compositional range (from basalts to per-alkaline rhyolites with scarce intermediate products). During the …
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Stratigraphic signatures of convergent orogenesis from the plate interior : studies from Tibet and the southern Rocky Mountains
… combined with inherited structures, active tectonics, geodynamic processes, and climatic feedback. Through these studies of the basin records of orogenesis in the Qaidam basin of northern Tibet and the southern Rocky Mountain basins of North America, we provide new constraints on the …
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Lake sediments as climate and tectonic archives in the Indian summer monsoon domain
… As the Spiti valley is located in the in the active tectonic orogen of Himalayas, it was essential to understand the role of regional tectonics to make valid interpretations of catchment erosion and detrital influx into the lake. My approach of using integrated structural/morphometric and …
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Multidisciplinary investigations of the Chaman strike-slip fault along the western Indo-Asian collision boundary, Pakistan
… fault, respectively. Geomorphic history of an active transpression was reconstructed using digital elevation model data integrated with Advance Spaceborne Thermal Emission and Reflection Radiometer and images from GeoEye-1 to understand the interaction of a strand of the Chaman fault and the …
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SAR interferometry analysis of surface processes in the Pamir – Tien Shan active orogens - emphasis on coseismic deformation and landslides
… methods and their application to tectonically active systems and related surface deformation. With 3 publications two case studies are presented: (1) The coseismic deformation related to the Nura earthquake (5th October 2008, magnitude Mw 6.6) at the eastern termination of the intramontane Alai …
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Pliocene-Pleistocene landscape evolution in south-central Chile : interactions between tectonic, geomorphic, and climatic processes
… in a complex interplay between climate and tectonics. Thus, the geomorphic characteristics of a landscape can only be understood if both, climatic and tectonic signals of past and ongoing processes can be identified. In order to evaluate the impact of both forcing factors it is crucial to …
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Fault Behavior and Kinematic Evolution of the Eastern California Shear Zone
The geomorphic expression, sedimentation, and near-field deformation of a fault system may be characterized to obtain an understanding of its kinematic evolution and potential seismic hazards. The dynamics and deformation history of the Eastern California shear zone (ECSZ), a wide and complex …
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Plio-pleistocene tectonic evolution of Southern Sardinia
… the kinematic related to the Plio-Pleistocene tectonics in southern Sardinia, although tectonic activity during the latest million years is long since known in the Island. Then, the general aim of this research is to improve the understanding of the recent geological evolution of the southern …
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Earthquakes in complex fault settings: Examples from the Oregon Cascades, Eastern California Shear Zone, and San Andreas fault
… In this dissertation I studied three different actively deforming regions across a variety of geologic settings. First, I explored the drivers of extension within the La Pine graben in the Oregon Cascades. I mapped >20 new Quaternary faults and conducted paleoseismic trenching, where I found …