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Dissertations / Theses on the topic 'Volcanic'

Author: Grafiati
Published: 4 June 2021
Last updated: 25 July 2025

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1

Purdy, David John. "Volcanic stratigraphy and origin of the Wallangarra Volcanics, Wandsworth volcanic group, northern NSW, Australia." Thesis, Queensland University of Technology, 2003.

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2

Smith, R. T. "Eruptive and depositional models for units 3 and 4 of the 1.85 ka Taupo eruption: Implications for the nature of large-scale 'wet' eruptions." Thesis, University of Canterbury. Geological Science, 1998. http://hdl.handle.net/10092/5928.

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Phreatomagmatic eruptions result from the explosive interaction between magma and some external source of water, and produce deposits which are usually distinctive in nature from those of magmatic eruptions. The widespread deposits of large-scale phreatomagmatic eruptions (usually termed Phreatoplinian) are poorly studied relative to their magmatic counterparts and, consequently, current models for large-scale phreatomagmatic volcanism remain speculative. The Hatepe ash and Rotongaio ash (units 3 and 4 of the 1.85 ka Taupo eruption) are two classical widespread phreatomagmatic fall deposits. T
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3

Bartolini, Stefania. "Volcanic hazard assessment in monogenetic volcanic fields." Doctoral thesis, Universitat de Barcelona, 2014. http://hdl.handle.net/10803/284845.

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One of the most important tasks of modern volcanology, which represents a significant socio-economic implication, is to conduct hazard assessment in active volcanic systems. These volcanological studies are aimed at hazard that allows to constructing hazard maps and simulating different eruptive scenarios, and are mainly addressed to contribute to territorial planning, definition of emergency plans or managing volcanic crisis. The impact of a natural event, as a volcanic eruption, can significantly affect human life, property, infrastructures, and the environment. Long periods of quiescence ar
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4

Wetie, Ngongang Ariane. "Seismic and Volcanic Hazard Analysis for Mount Cameroon Volcano." Diss., University of Pretoria, 2016. http://hdl.handle.net/2263/60871.

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Mount Cameroon is considered the only active volcano along a 1600 km long chain of volcanic complexes called the Cameroon Volcanic Line (CVL). It has erupted seven times during the last 100 years, the most recent was in May 2000. The approximately 500,000 inhabitants that live and work around the fertile flanks are exposed to impending threats from volcanic eruptions and earthquakes. In this thesis, a hazard assessment study that involves both statistical modelling of seismic hazard parameters and the evaluation of a future volcanic risk was undertaken on Mount Cameroon. The Gutenberg-Richter
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5

Hellwig, Bridget M. "The viscosity of dacitic liquids measured at conditions relevant to explosive arc volcanism determing the influence of temperature, silicate composition, and dissolved volatile content /." Diss., Columbia, Mo. : University of Missouri-Columbia, 2006. http://hdl.handle.net/10355/4597.

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Thesis (M.S.)--University of Missouri-Columbia, 2006.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (February 7, 2007) Includes bibliographical references.
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Vallejo, Vargas Silvia Ximena. "Numerical models of volcanic flows for an estimation and delimitation of volcanic hazards, the case of Reventador volcano (Ecuador)." Thesis, Université Clermont Auvergne‎ (2017-2020), 2017. http://www.theses.fr/2017CLFAC100/document.

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Les coulées de laves sont les produits volcaniques les plus représentatifs des éruptions effusives. Elles sont formées quand le magma est extrudé et se répand à la surface de la Terre. Quand la lave arrive en surface, elle perd de la chaleur et refroidit. Le refroidissement affecte directement les propriétés rhéologiques de la lave, jusqu’à arrêter son écoulement. Les paramètres rhéologiques qui contrôlent la dynamique des coulées de laves sont la viscosité et le seuil de plasticité, qui dépendent eux-mêmes de la composition chimique, de la cristallinité et de la teneur en bulles. Il existe de
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7

Smith, Cassandra M. "Volcanic Electrification: A Multiparametric Case Study of Sakurajima Volcano, Japan." Scholar Commons, 2019. https://scholarcommons.usf.edu/etd/7950.

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Electrical activity at volcanoes has been recently recognized as a potential new remote sensing technique for plume-forming eruptions. Volcanic electrical activity takes place in the conduit and plume and therefore has the benefit of being a direct indicator of surface activity. This is unlike seismic signals, which indicate magma/gas movement underground, and infrasound signals, which indicate a surface explosion but not necessarily the formation of an ash plume. There are two distinct types of volcanic electrical discharges: volcanic lightning and continual radio frequency (CRF) impulses. T
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8

Longobardi, Mariantonietta <1983&gt. "Locating the source of volcanic tremor at stromboli volcano, italy." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amsdottorato.unibo.it/5181/1/Tesi.pdf.

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We have developed a method for locating sources of volcanic tremor and applied it to a dataset recorded on Stromboli volcano before and after the onset of the February 27th 2007 effusive eruption. Volcanic tremor has attracted considerable attention by seismologists because of its potential value as a tool for forecasting eruptions and for better understanding the physical processes that occur inside active volcanoes. Commonly used methods to locate volcanic tremor sources are: 1) array techniques, 2) semblance based methods, 3) calculation of wave field amplitude. We have choosen the third ap
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Longobardi, Mariantonietta <1983&gt. "Locating the source of volcanic tremor at stromboli volcano, italy." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amsdottorato.unibo.it/5181/.

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We have developed a method for locating sources of volcanic tremor and applied it to a dataset recorded on Stromboli volcano before and after the onset of the February 27th 2007 effusive eruption. Volcanic tremor has attracted considerable attention by seismologists because of its potential value as a tool for forecasting eruptions and for better understanding the physical processes that occur inside active volcanoes. Commonly used methods to locate volcanic tremor sources are: 1) array techniques, 2) semblance based methods, 3) calculation of wave field amplitude. We have choosen the third ap
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10

NOGUEIRA, LAGES Joao Pedro. "Constrains on mantle, slab and crustal contributions to major volatiles and noble gases along the Andean Volcanic Belt." Doctoral thesis, Università degli Studi di Palermo, 2020. http://hdl.handle.net/10447/395502.

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11

Milawski, James. "Quaternary Volcanic Ash Transformation in the Mayan Lowland." University of Cincinnati / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1377871595.

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12

García, Pérez Olaya. "The explosive volcanism of Teide-Pico Viejo volcanic complex, Canary Island." Doctoral thesis, Universitat de Barcelona, 2013. http://hdl.handle.net/10803/130923.

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The explosive events in Teide Pico Viejo (TPV) complex in Tenerife Island (Spain) have traditionally been restricted to the subplinian eruption of Montaña Blanca, which occurred about 2000 years ago. A recent revision of the stratigraphy of TPV shows that phonolitic explosive activity has been significant during the Holocene, with several distinct episodes related to eruptions ranging from Strombolian to sub-plinian. Using field, mineralogical and geochemical stratigraphic correlations, we have identified 11 phonolitic explosive eruptions related to the satellite domes present all around TPV
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13

Watt, Sebastian F. L. "Records of volcanism and controls on volcanic processes in southern Chile." Thesis, University of Oxford, 2010. http://ora.ox.ac.uk/objects/uuid:41cf206e-2cef-4108-9267-5e9217aee96d.

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This thesis describes volcanic records from the Andean southern volcanic zone, based on the collection of field data between Calbuco and Puyuhuapi volcanic centres, with a particular focus on the Hualaihue peninsula, combined with existing records from the region as a whole. These data, extending the understanding of the volcanic history of southern Chile, are examined for evidence of spatial or temporal variability, which may be used to explore underlying controls on volcanic processes. All three volcanoes on the Hualaihue peninsula have been active in the Holocene. A large mafic scoria unit
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Syahbana, Davy Kamil. "Seismological study of volcanic activity at Papandayan volcano, West Java, Indonesia." Doctoral thesis, Universite Libre de Bruxelles, 2013. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209395.

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Dans l'histoire des éruptions volcaniques, le Papandayan à l'Ouest de Java est considéré comme l'un des plus meurtriers après avoir causé la mort de 2957 personnes et des dégâts sérieux en 1772. L'éruption la plus récente de ce volcan a eu lieu en 2002 et était de type phréatique. Cette éruption a été précédée d'une augmentation soudaine de l'activité sismique moins de deux jours avant l'éruption. Aucune victime n'a été déplorée. La nature de cette éruption est indéfinie. Cette thèse regroupe plusieurs études utilisant différentes techniques en vue d'améliorer la prédictibilité des éruptions d
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15

Johnstone, Jade. "Rainfall induced volcanic activity on Soufriere Hills Volcano, Montserrat, West Indies." Thesis, University of East Anglia, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.490615.

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Extremely hazardous volcanic dome collapse and pyroclastic flows can occur without warning and can be triggered by intense rainfall. Rainfall data collected on Soufriere Hills Volcano, Montserrat between 1998 and 2006 was analysed to assess the impact on primary volcanic activity, defined here as pyroclastic flows, dome collapse and explosions and to explore the utility of meteorological data as a predictive tool for active volcanoes. A statistical analysis of daily rainfall totals and volcanic activity, showed that if greater than 20 mm of rainfall fell on a particular day the probability of
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16

Ebmeier, Susanna Kathryn. "InSAR measurements of volcano deformation on the Central American Volcanic Arc." Thesis, University of Oxford, 2012. http://ora.ox.ac.uk/objects/uuid:c015fe2a-f4dc-49db-b150-a2ab00ba8f5b.

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Satellite measurements of volcano deformation have the potential to illuminate a wide range of volcanic processes and have provided us with the first opportunity to investigate volcano deformation as an arc-scale process. This thesis presents the results of an Interferometric Synthetic Aperture Radar (InSAR) survey of the Central American Volcanic Arc between 2007 and 2010. My measurements confirm a statistically significant absence of magmatic deformation in Central America relative to other well-studied volcanic arcs. I estimate a minimum detection threshold for deformation at 20 of the arc’
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17

Rawson, Harriet. "Volcanic history and magmatic evolution of Mocho-Choshuenco Volcano, southern Chile." Thesis, University of Oxford, 2015. https://ora.ox.ac.uk/objects/uuid:05969e3b-4f38-4478-bc26-381ca13bce1d.

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Active volcanoes pose a significant natural hazard. In order to evaluate the hazard it is important to reconstruct the history of such volcanoes to understand the frequency, style of eruption and the areas typically affected by the explosive eruptions. This thesis focuses on deciphering the volcanic and magmatic record for one of the most productive volcanoes in southern Chile, Volcán Mocho-Choshuenco. Work presented in the thesis establishes a detailed record of the explosive activity during the last 18 kyrs, constructed using field observations and geochemical analyses of the eruption depos
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18

Leonard, Graham S. "The evolution of Maroa Volcanic Centre, Taupo Volcanic Zone, New Zealand." Thesis, University of Canterbury. Geology, 2003. http://hdl.handle.net/10092/5437.

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Maroa Volcanic Centre (Maroa) is located within the older Whakamaru caldera, central Taupo Volcanic Zone, New Zealand. Dome lavas make up the majority of Maroa volume, with the large Maroa West and East Complexes (MWC and MEC, respectively) erupted mostly over a short 29 kyr period starting at 251 ± 17 ka. The five mappable Maroa pyroclastics deposits are discussed in detail. The Korotai (283 ± 11 ka), Atiamuri (229 ±12 ka), and Pukeahua (~229 -196 ka) pyroclastics are all s 1 km3 and erupted from (a) northern Maroa, (b) a vent below Mandarin Dome and (c) Pukeahua Dome Complex vents, respectiv
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19

Hartley, Margaret Elizabeth. "Post glacial volcanism and magmatism on the Askja volcanic system, North Iceland." Thesis, University of Edinburgh, 2012. http://hdl.handle.net/1842/5845.

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Postglacial activity on the Askja volcanic system, north Iceland, has been dominated by basaltic volcanism. Over 80% of Askja's postglacial basalts fall within a relatively narrow compositional range containing between 4 and 8 wt.% MgO. The 'main series' is further divided into two groups separated by a distinct compositional gap evident in major and trace element concentrations. The most evolved basalts formed by fractional crystallisation within shallow magma reservoirs, followed by the extraction of residual liquid from a semi-rigid, interconnected crystal network. This process is analogous
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20

Spinks, Karl D. "Rift architecture and Caldera volcanism in the Taupo Volcanic Zone, New Zealand." Thesis, University of Canterbury. Geological Sciences, 2005. http://hdl.handle.net/10092/4944.

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The Taupo Volcanic Zone (TVZ) is investigated to determine the interaction of regional structure and volcanism. A three-tiered approach is employed involving (i) analysis of rift geometry and segmentation in Modem TVZ(<300 ka) from remote sensing and digital topographic data; (ii) fault kinematic data collected along the length of TVZ; and (iii) combining new and existing volcanological data for TVZ. Modem TVZ is a NNE-SSW trending intra-arc rift zone, subject to dextral transtension, and characterised by a segmented axial rift zone with a number of offset and variably oriented rift segments.
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21

Ritchie, Alistair B. H. "Volcanic geology and geochemistry of Waiotapu Ignimbrite, Taupo Volcanic Zone, New Zealand." Thesis, University of Canterbury. Geological Sciences, 1996. http://hdl.handle.net/10092/6588.

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Waiotapu Ignimbrite (0.710 ± 0.06 Ma) is a predominantly densely welded, purple-grey coloured, pumice rich lenticulite, which is exposed on both eastern and western flanks of Taupo Volcanic Zone. The unit is uniform in terms of lithology and mineralogy over its entire extent and has been deposited as a single flow unit. The unit contains abundant pumice clasts which are often highly attenuated (aspect ratios of c.1 :30) and are evenly distributed throughout the deposit. Lithic fragments are rare, never exceeding 1% of total rock volume at an outcrop and no proximal facies, such as lithic lag b
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22

Emery, William Daniel. "Geology and Eruptive History of the Late Oligocene Nathrop Volcanics, Central Colorado Volcanic Field." Bowling Green State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1299733477.

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23

Montelius, Cecilia. "The genetic relationship between rhyolitic volcanism and Zn-Cu-Au deposits in the Maurliden volcanic centre, Skellefte district, Sweden : volcanic facies, lithogeochemistry and geochronology /." Luleå : Luleå University of Technology, 2005. http://epubl.luth.se/1402-1544/2005/17.

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24

Maund, J. G. "The volcanic geology, petrology and geochemistry of Caldeira volcano, Graciosa, Azores, and its bearing on contemporaneous felsic-mafic oceanic island volcanism." Thesis, University of Reading, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.370121.

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25

Letham-Brake, Mark. "Geological constraints on fluid flow at Whakaari volcano (White Island)." Thesis, University of Canterbury. Department of Geological Sciences, 2013. http://hdl.handle.net/10092/8728.

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This study assesses the geological constraints on fluid flow within the main crater of Whakaari volcano (White Island) which is located in the Bay of Plenty, New Zealand. A review of the volcanological and morphological history, field mapping, and permeability experiments were used to propose a model for single-state (gas or liquid water) fluid flow in the volcano. Three structural scales were of most importance: (a) the elongate main crater (1.2 km by 0.5 km); which contains (b) three subcraters (~300-500 m in diameter); and (c) >14 historic eruption craters and crater complexes (30-300 m in
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26

Wilson, James Adams. "A New Volcanic Event Recurrence Rate Model and Code For Estimating Uncertainty in Recurrence Rate and Volume Flux Through Time With Selected Examples." Scholar Commons, 2016. http://scholarcommons.usf.edu/etd/6435.

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Recurrence rate is often used to describe volcanic activity. There are numerous documented ex- amples of non-constant recurrence rate (e.g. Dohrenwend et al., 1984; Condit and Connor, 1996; Cronin et al., 2001; Bebbington and Cronin, 2011; Bevilacqua, 2015), but current techniques for calculating recurrence rate are unable to fully account for temporal changes in recurrence rate. A local–window recurrence rate model, which allows for non-constant recurrence rate, is used to calculate recurrence rate from an age model consisting of estimated ages of volcanic eruption from a Monte Carlo simulati
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Telling, Jennifer Whitney. "Microphysical processes of volcanic ash aggregation and their implications for volcanic eruption dynamics." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/52925.

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Although numerous hazard models exist to assess possible ash fallout from explosive volcanic eruptions around the world, these models frequently neglect to consider ash aggregation or use a simple percent proxy to represent aggregation, without considering the varying processes at work throughout the volcanic flow. Eruption dynamics are sensitive to ash aggregation, and ash aggregates are commonly found in eruptive deposits, yet few experiments have been conducted on aggregation phenomena using natural materials. In this work, experiments were developed to produce both probabilistic and proces
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Dibben, Christopher J. L. "Looking beyond eruptions for an explanation of volcanic disasters : vulnerability in volcanic environments." Thesis, University of Bedfordshire, 1999. http://hdl.handle.net/10547/582569.

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'Natural' disasters have traditionally been viewed as the result of an extreme physical environment. A radical backlash against this dominant view, in the nineteen seventies and eighties, moved the debate to the opposite extreme and in doing so replaced physical with social determinism. Vulnerability analysis is proposed as a methodology that bridges these extremes. It takes into account individual decision making, social milieu and physical hazard when describing human habitation in areas of volcanic activity. It is argued that vulnerability should be defined in terms of universal human needs
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Galeazzo, Tommaso. "Tracking volcanic sulphate : modelling tropospheric volcanic sulphate formation and its oxygen isotopic signatures." Electronic Thesis or Diss., Sorbonne université, 2018. http://www.theses.fr/2018SORUS300.

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Les émissions volcaniques sont une source importante de soufre. Le soufre volcanique est oxydé et forme des aérosols sulfatés qui influencent le climat en absorbant et en dispersant le rayonnement solaire incident. Les émissions de soufre dans la troposphère influencent le climat local et régional, mais de grandes incertitudes subsistent en ce qui concerne l’oxydation et sa conversion en aérosols de sulfate volcanique. L’oxydation du soufre dans une vaste gamme de panaches volcaniques et l’influence des halogènes volcaniques sur la chimie du panache sont étudiées à l’aide d’un modèle de boîte
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Clavero, Jorge Eduardo. "Evolution of Parinacota volcano and Taapaca Volcanic Complex, Central Andes of Northern Chile." Thesis, University of Bristol, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.393075.

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31

B, Jhon Macario Londoño. "A seismic model for the volcanic activity of Nevado del Ruiz Volcano, Colombia." 京都大学 (Kyoto University), 2002. http://hdl.handle.net/2433/149994.

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32

Doherty, Angela Louise. "Blue-sky eruptions, do they exist? : implications for monitoring New Zealand's volcanoes." Thesis, University of Canterbury. Geological Sciences, 2009. http://hdl.handle.net/10092/2855.

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The term “blue-sky eruption” (BSE) can be used to describe eruptions which are unexpected or have no detected precursory activity. Case study analyses indicate that they have a diverse range of characteristics and magnitudes, providing both direct and indirect hazards and occur in both under-developed and developed countries. BSEs can be a result of physical triggers (e.g. the lack of physically detectable precursors or a lack of understanding of the eruption model of the volcano), social triggers (such as an inadequate monitoring network), or a combination of the two. As the science of eru
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Wright, Heather Michelle. "Physical and chemical signatures of degassing in volcanic systems /." view abstract or download file of text, 2006. http://proquest.umi.com/pqdweb?did=1188873641&sid=1&Fmt=2&clientId=11238&RQT=309&VName=PQD.

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Thesis (Ph. D.)--University of Oregon, 2006.<br>Typescript. Includes vita and abstract. Includes bibliographical references (leaves 162-173). Also available for download via the World Wide Web; free to University of Oregon users.
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34

McOwen, Lisa Kathryn 1968. "The Brock canyon volcanic complex, Grant County, New Mexico: volcanic evolution, alteration, and mineralization." Thesis, The University of Arizona, 1993. http://hdl.handle.net/10150/558223.

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Rinaldi, Antonio Pio <1982&gt. "Modeling hydrothermal system: deriving observables and hydrothermal instability in volcanic and non-volcanic setting." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2011. http://amsdottorato.unibo.it/3321/1/Rinaldi_Antonio_tesi.pdf.

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Hydrothermal fluids are a fundamental resource for understanding and monitoring volcanic and non-volcanic systems. This thesis is focused on the study of hydrothermal system through numerical modeling with the geothermal simulator TOUGH2. Several simulations are presented, and geophysical and geochemical observables, arising from fluids circulation, are analyzed in detail throughout the thesis. In a volcanic setting, fluids feeding fumaroles and hot spring may play a key role in the hazard evaluation. The evolution of the fluids circulation is caused by a strong interaction between magmatic an
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Rinaldi, Antonio Pio <1982&gt. "Modeling hydrothermal system: deriving observables and hydrothermal instability in volcanic and non-volcanic setting." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2011. http://amsdottorato.unibo.it/3321/.

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Hydrothermal fluids are a fundamental resource for understanding and monitoring volcanic and non-volcanic systems. This thesis is focused on the study of hydrothermal system through numerical modeling with the geothermal simulator TOUGH2. Several simulations are presented, and geophysical and geochemical observables, arising from fluids circulation, are analyzed in detail throughout the thesis. In a volcanic setting, fluids feeding fumaroles and hot spring may play a key role in the hazard evaluation. The evolution of the fluids circulation is caused by a strong interaction between magmatic an
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POLA, VILLASENOR ANTONIO. "Physical and Mechanical characterization of altered volcanic rocks for the stability of volcanic edifices." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2011. http://hdl.handle.net/10281/18917.

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Geomechanical characterisation of altered volcanic rocks and their role in flank volcanoes stability are evaluated in this study. Physical and mechanical properties and their variation with the degree of alteration are described in detailed. A series of multidisciplinary tests were performed to identify and quantify the progressive degradation of the properties. They are as follow: 1) petrographycal and chemical studies (thin-sections, x-ray diffractions and x-ray fluorescence); 2) effective and total porosity (standard test procedure, mercury intrusion porosimetry, pycnometer tests, two-dimen
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Mattsson, Hannes B. "Volcanism at the tip of a propagating rift : the Heimaey volcanic centre, south Iceland /." Stockholm : Institutionen för geologi och geokemi, Univ, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-257.

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Carmody, L. "Geochemical characteristics of carbonatite-related volcanism and sub-volcanic metasomatism at Oldoinyo Lengai, Tanzania." Thesis, University College London (University of London), 2012. http://discovery.ucl.ac.uk/1348540/.

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The eruption of xenolithic material during large explosive eruptions, at any volcano, supply vital samples of the sub-surface lithologies upon which it is built, which in turn provides an indication of the evolution of the volcanic complex, in particular the volcanic conduit, magma storage zones and crustal / mantle lithologies. This is particularly important at alkaline-carbonatite complexes which are known to have “exotic” chemistries and also cause extensive zones of alteration through fenitisation processes. As the only active carbonatite volcano on Earth and also the unusual nature of Old
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Heslop, S. E. "Aspects of volcanic fluid dynamics." Thesis, Lancaster University, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.383570.

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Matthews, C. "Fracture mechanics of volcanic eruptions." Thesis, University College London (University of London), 2009. http://discovery.ucl.ac.uk/16280/.

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Seismology is a key tool in the forecasting of volcanic eruptions. The onset of an eruption is often preceded and accompanied by an increase in local seismic activity, driven by fracturing within the edifice. For closed systems, with a repose interval of the order of a century or more, this fracturing must occur in order to create a pathway for the magma to reach the surface. Time-to-failure forecasting models have been shown to be consistent with seismic acceleration patterns prior to eruptions at volcanoes in subduction zone settings. The aim of this research is to investigate the patterns i
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Simpson, Annika Emilia. "Microbial weathering of volcanic rocks." Thesis, Open University, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.607463.

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The aim of this thesis was to further the knowledge on microbial weathering, by looking at the effect of model organisms (AcidithiobacilIus ferrooxidans and Geobacter metallireducens) to natural microbial communities (from basaltic glass). It was found that the medium water-rock ratio (50: I) provided the optimum conditions for A. ferrooxidans growth, whilst the low water-rock ratio (1: I) had a lower release of iron because of pH. The pH affected the release of iron and REEs, with less released the higher the pH. In addition, it was found that, though localised areas of hematite were found on
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Bower, S. M. "Models of explosive volcanic eruptions." Thesis, University of Cambridge, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.596823.

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This thesis describes the investigation of fluid dynamic processes involved in maintained explosive volcanic eruptions. The thesis is divided into chapters relating to dynamical processes in a volcanic system: evolution and evacuation of a reservoir of molten rock, flow in a narrow conduit to the Earth's surface, and subsequent transport in the atmosphere. In chapter 2, we calculate the mass erupted, prior to caldera collapse, from a chamber as the pressure changes from a certain overpressure to a specified underpressure at which wall collapse occurs. The compressibility of the magma increases
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Burt, Mary Louise. "Statistical modelling of volcanic hazards." Thesis, University of Reading, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282730.

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45

Harford, Chloe Linden. "The volcanic evolution of Montserrat." Thesis, University of Bristol, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343316.

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46

Dingwell, Adam. "Atmospheric Dispersion Modellingof Volcanic Emissions." Licentiate thesis, Uppsala universitet, Luft-, vatten och landskapslära, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-263081.

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Gases and particles released by volcanoes pose a serious hazard to humans and society. Emis-sions can be transported over long distances before being reduced to harmless concentrations.Knowing which areas are, or will be, exposed to volcanic emissions is an important part inreducing the impact on human health or society. In this thesis, the dispersion of volcanic emis-sions is studied using a set of atmospheric models. Two case studies have been performed, onestudying potential ash emission from future eruptions on Iceland, and a second covering SO2 emissions from Mt. Nyiragongo in D.R. Congo
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47

Dingwell, Adam. "Dispersion modelling of volcanic emissions." Doctoral thesis, Uppsala universitet, Luft-, vatten och landskapslära, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-303959.

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Gases and particles released by volcanoes pose a serious hazard to humans and society. Emissions can be transported over long distances before being reduced to harmless concentrations. Knowing which areas are, or will be, exposed to volcanic emissions is an important part inreducing the impact on human health and society. In this thesis, the dispersion of volcanic emissions is studied using a set of atmospheric models. The work includes contribution to the development of the Lagrangian Particle Dispersion Model FLEXPART-WRF. Three case studies have been performed, one studying potential ash em
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Blower, Jonathan David. "Degassing processes in volcanic eruptions." Thesis, University of Bristol, 2001. http://hdl.handle.net/1983/30b2bc8c-2956-4a7a-a801-cdbef473ee1a.

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49

Smith, Patrick John. "Attenuation of volcanic seismic signals." Thesis, University of Leeds, 2010. http://etheses.whiterose.ac.uk/1131/.

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Low frequency volcanic earthquakes, characterised by slowly decaying harmonic codas of 0.5-5Hz, have been observed on many volcanoes and are considered key tools in monitoring and eruption forecasting. The common element in a variety of models proposed for the origin of these earthquakes is resonance of a fluid body within a volcanic edifice. The source of the resonance is believed to consist of dispersive interface waves, trapped at the fluid-solid boundaries. The amplitude decay or attenuation of these earthquake signals can be decomposed into radiative and intrinsic components, and in this
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Carter, Catherine St John. "Communication of Lava Flow Hazards at the San Francisco Volcanic Field, Flagstaff, Arizona." Scholar Commons, 2015. http://scholarcommons.usf.edu/etd/5655.

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This thesis examines different methods of communicating volcanic hazards to the population of Flagstaff, Arizona using the results of a recent lava flow hazard assessment of the nearby San Francisco Volcanic Field (SFVF). Harburger (2014) determined that given a lava flow originating in the SFVF, there is a statistical probability that it will inundate the city of Flagstaff or even originate from a vent within the city limits. Based on the recurrence rates for the most recent eruptions (3 x 10-4/year), the probability of lava flow inundation in Flagstaff is 1.1 x 10-5 per year. This study cons
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