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 7 of 7 for “"caldera collapse"”.
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The 2014-15 Bárðarbunga-Holuhraun magmatic rifting episode: A seismic study
… southeastern rim of the ice-covered Bárðarbunga caldera in central Iceland. Over the course of two weeks a dyke propagated 48 km beneath the glacier northeastwards and into the Holuhraun lava field, where it erupted for six months, becoming the largest eruption in Iceland for over 200 years. …
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HYDROTHERMAL FLUID TRANSPORT PATHWAYS ALONG FRACTURES AND VEINS AT BROTHERS VOLCANO, SOUTHERN KERMADEC ARC
… in the mineralization of economic metals within calderas. But there are several methods by which fractures can form. Regional extension, episodic caldera collapse, and fluid overpressure all have the potential to create brittle features. Current studies focus on the formation of fractures and …
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Mud Volcano Systems: Structure, Evolution and Processes
… by new vents due to the onset of elongate-caldera collapse. Kilometre-scale, elongate scarps are identified as ‘sector collapses’ on mud volcanoes in Azerbaijan due to morphological similarity to those on igneous volcanoes. Shape parameters distinguish sector collapses and eruptive mud …
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Near-vent processes of the 273 ka Poris eruption (Tenerife)
Near-vent processes during caldera-forming explosive eruptions are poorly known, as are relations between proximal and counterpart distal ignimbrites. Consequently, understanding of the full course of these eruptions and how to analyse their deposits for purposes of hazard assessment has been …
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Interactions Between Tectonism and Magmatism at Santorini: Insights from an Active Source Seismic Experiment
… magmatic diking and volcanic edifice growth/collapse can change both the regional and local stress/strain in the crust altering the style and amount of faulting. The relative importance of these magmatic and tectonic processes as well as how these processes coevolve are still poorly known. …
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Prelude to the Tshirege caldera-forming eruption of the Bandelier magmatic system, New Mexico, USA
Two caldera-forming eruptions have occurred in the Bandelier magmatic system of the Jemez Mountains of northern New Mexico, the latter of which formed Valles caldera during the Tshirege eruption at 1232 ka. Despite no eruptions at Valles in the last ca. 70 kyr, the presence of partially molten …
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Investigations of Anomalous Earthquakes at Active Volcanoes
… swarms, effusive and explosive eruptions, and caldera collapse, and approximately 70% are associated with documented volcanic eruptions or episodes of volcanic unrest. Those events with vertical pressure axes typically occur after volcanic eruptions initiate, whereas events with vertical …