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 9 of 9 for “"Magma residence"”.
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Timescales of magma residence and transport underneath Iceland
… to characterise the timescales of pre-eruptive residence and transport: the Skuggafjöll eruption, Bárðarbunga volcanic system; the Borgahraun eruption, Theistareykir volcanic system; and the Laki eruption, Grímsvötn volcanic sytem. These findings are then synthesised within an Icelandic and …
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Geochemistry of Melt Inclusions from the Fondo Riccio and Minopoli 1 Eruptions at Campi Flegrei (Italy)
… In this study, the geochemistry of the magma associated with two different eruptions at Campi Flegrei has been characterized, with the aim to identify geochemical trends that may help to predict the style and nature of future eruptions. Two eruptions of different age and eruptive style …
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Crystallisation history of rhyolite magmas at Tarawera volcano, New Zealand, from in-situ 238U-230Th disequilibrium dating and trace element geochemistry of zircon
… of the episodes involved at least two distinct magma types that were erupted from the same conduit. New SIMS 238U-230Th disequilibrium dating and trace element analyses (U, Th, Y, Hf, Ce, Ti) of individual zircon crystals provide insight to the timescales of silicic magma system processes. …
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Temporal and petrogenetic constraints on volcanic accretionary processes at 9-10 degrees north East Pacific Rise
… the distribution and timing of volcanic and magmatic activity. Uranium series nuclides are susceptible to fractionation by magmatic processes that occur beneath mid-ocean ridges, and the half-lives of 226Ra (1.6 kyrs) and 230Th (75 kyrs) make them ideally suited for determining eruption ages …
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The record of magma storage conditions in mineral compositions below a glacial to ice-free Askja volcano, Iceland
… and textures from basaltic lavas to reconstruct magma chamber conditions before, during and after glaciation. In this study, 36 lava flow and gabbro xenolith samples were collected from seven separate units: two glacial, the Early Holocene, and four historical. These samples were analyzed along …
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Abundances of Lithium, Beryllium and Boron in Phenocrysts from Santorini Volcano (Greece): Implications on Magma Genesis and Eruption Mechanisms
… new tools and schemes to explain more of the magmatic enigma. Among these new approaches is the use of the light elements lithium, beryllium and boron and their isotopes: incompatible in common mineral phases in the magma and sensitive as tracers of source components and material recycling in …
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Temporal and petrogenetic constraints on volcanic accretionary processes at 9-10 degrees North East Pacific Rise
… the distribution and timing of volcanic and magmatic activity. Uranium series nuclides are susceptible to fractionation by magmatic processes that occur beneath mid-ocean ridges, and the half-lives of 22 6Ra (1.6 kyrs) and 23Th (75 kyrs) make them ideally suited for determining eruption ages …
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UNDERSTANDING ERUPTIVE DYNAMICS, PLUME DISPERSAL AND PARTICLE TRANSPORT FOR RISK ASSESSMENT IN PAROXYSMAL MAFIC ERUPTIONS
… estimates of eruptive source parameters, such as magma ascent velocities and magma residence times within the conduit.
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Geochemical and volcanological aspects of rhyolite eruptions from Taupo Volcanic Zone, New Zealand
… of eruptions in the TVZ implies that the magmatic systems may not be analogous to those documented at other rhyolitic centres in continental settings which generally have eruption frequencies that are orders of magnitude greater. This study was undertaken to further understanding of the …