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 72 for “"volcanology"”.
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Volcanology from space: applications of infrared remote sensing
Remote sensing techniques are being used increasingly to address volcanological problems. This thesis is concerned with the interpretation of multispectral infrared data of volcanic thermal features. Data from the two short wavelength infrared (SWIR) bands of the Landsat Thematic Mapper (TM) are …
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Volcanology and geochemistry of selected kimberlites from the Lulo kimberlite field, Angola
Abstract The area under study is the Lulo Kimberlite Field in the province of Lunda Norte, Angola, which is located 630 km east of the capital, Luanda. This 3000 km2 concession is one of the world's most abundant alluvial diamond fields, producing high value Type IIa diamonds, as well as hosting a …
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The volcanology and petrogenesis of the Northern Lunar Crater Volcanic Field, Nye County, Nevada
The Northern Lunar Crater Volcanic Field (NLCVF) is located along the axis of the Great Basin in Nye County, Nevada. This area of Pliocene to Recent cinder cones, maars and alkali basalt lava flows represents the northern terminus of the Death Valley-Pancake Range Basalt Zone. Basalts from this …
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The eruptions of Örӕfajökull 1362 (Iceland) and Lanzarote 1730-36 (Canary Islands) : sulphur emissions and volcanology
This thesis presents new data on the volcanology, erupted volumes, and sulphur emissions of the AD 1362 Örӕfajökull eruption and the AD 1730-36 Lanzarote eruption, and relates these findings to their atmospheric and environmental impacts. The Örӕfajökull eruption was an explosive Plinian event with …
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Geophysical and geochemical constraints on submarine volcanic processes
… to address key open questions in submarine volcanology. This thesis provides new insight into submarine volcanic processes using observations and samples from the 2011 Axial Seamount eruption, the 2012 Havre Volcano eruption, and the Mid-Atlantic Ridge near 14°N. In Chapter 2, I develop best …
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Volcanic deformation as an indicator of mechanical stability and eruption susceptibility
… future hazards. The classic paradigm in volcanology is that eruption occurs when the pressure within a magma reservoir exceeds the confining strength of the host rock surrounding it. However, this paradigm has been widely debated in recent years as quantitative constraints on critical …
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Embayments in explosive, silicic eruptions : a textural, numerical, and experimental assessment.
… the foundation for a powerful new technique in volcanology that is thought to record how quickly the magma ascended during an eruption. My goal was to determine how accurately embayments record changes in the magma during ascent. Using a high-pressure, high-temperature system, I performed …
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Science, politics, and soul-making: the Romantic encounter with climate change
… from meteorology, climatology, geology, and volcanology with theoretical frameworks derived from environmental criticism, I argue this period, in no small part due to the influence of creative writers, saw a new sense of the earth’s climate as contingent, dynamic, globally interconnected, and …
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Degassing Behaviour of Basaltic Open Vent Volcanoes
… thesis investigates two problems in the field of volcanology by using a combination of remote sensing of volcanic gases, magma modelling and fluid dynamics. The first problem relates to gas-flow through particle-liquid suspension; with relevance for understanding the mechanism of intermittency and …
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The geology of kimberlites from the Fort a la Corne area, Saskatchewan, Canada
… is then applied to the deposits. The volcanology of the Fort a la Cone kimberlites are then discussed: these are unusual in that the craters are preserved, and are broad and flat, rather than steep sided tapering cones. A new term, pateran crater, and process of evolution is proposed …
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Geophysical and geochemical constraints on submarine volcanic processes
… to address key open questions in submarine volcanology. This thesis provides new insight into submarine volcanic processes using observations and samples from the 2011 Axial Seamount eruption, the 2012 Havre Volcano eruption, and the Mid-Atlantic Ridge near 14°N. In Chapter 2, I develop best …
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Deciphering the 4-D geological framework of the Taupo-Reporoa Basin: Implications for hydrothermal fluid flow and volcanism
… rocks. Corresponding sedimentology, physical volcanology, geochemical analyses, and 40Ar/39Ar age determinations have allowed surface outcrops to be correlated with geothermal drillhole records to at least ~3 km depth. This has resulted in the development of an age constrained 4-D basin …
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Integrated geophysical studies at Masaya volcano, Nicaragua
… fundamental question in modem volcanology concerns the manner in which a volcanic eruption is triggered; the intrusion of fresh magma into a reservoir is thought to be a key component. The amount by which previously ponded reservoir magma interacts with a newly intruded magma …
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First multi-year muography of Etna Volcano
… and from National Institute for Geophysics and Volcanology (INGV) - Etna Observatory.
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An unexpected journey: experimental insights into magma and volatile transport beneath Erebus volcano, Antarctica
… aspects of the Erebus system, such as physical volcanology, gas chemistry, petrology, melt inclusion research, seismic, and more. Despite this large data set, however, interpretations of Erebus rocks, particularly mafic and intermediate lavas, which are thought to originate from deep within the …
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