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Дисертації з теми "Volcanic systems"

Автор: Grafiati
Опубліковано: 10 березня 2023

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1

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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Анотація:
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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2

COSTA, Michela. "Bromine degassing in basaltic volcanic systems." Doctoral thesis, Università degli Studi di Palermo, 2014. http://hdl.handle.net/10447/91244.

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3

Collinson, Amy Sarah Diana. "Determination of degassing patterns in volcanic systems." Thesis, University of Leeds, 2014. http://etheses.whiterose.ac.uk/7099/.

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Анотація:
The volume of gas contained within a silicic magma, dissolved and subsequently exsolved, greatly influences the behaviour of a volcano. There is a marked contrast between the behaviour of a volcano "open" to degassing, compared to one which is "closed". It is, therefore, essential to understand the entire degassing process of gas transport, storage and loss. The particular focus of this study is the effect different permeabilities and pressure gradients within a volcanic edifice have on the degree and pattern of the gas velocity. Gas loss is modelled numerically in two- and three-dimensions us
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4

Wyk, de Vries Benjamin van. "Tectonics and magma evolution of Nicaraguan volcanic systems." Thesis, Open University, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.577137.

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5

Peters, Michael Steven. "Temporal impacts of volcanic ash in freshwater systems." Thesis, University of Canterbury. Geological Sciences, 2012. http://hdl.handle.net/10092/7639.

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Анотація:
Volcanic ash can cause acidification and metal contamination of freshwater systems. Shmt-te1m chemical and pH fluxes in water have been attributed to dissolution of the ash surface film while dissolution of the glassy matrix has been linked to metal input over longer time periods. The rate at which ash surface film and glassy matrix dissolution occurs and the associated impact of ash to freshwater pH and chemistry over time has not previously been established. The influence of volcanic ash BET surface area on initial pH fluxes and metal dissolution rates in freshwater systems was investigated
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6

Cortés, Joaquín Alberto. "Thermodynamics of magma recharge in open volcanic systems : a case study from Stromboli volcano, Italy." Thesis, University of Leeds, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.421973.

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7

Wilson, Thomas McDonald. "Vulnerability of Pastoral Farming Systems to Volcanic Ashfall Hazards." Thesis, University of Canterbury. Geological Sciences, 2009. http://hdl.handle.net/10092/5978.

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Анотація:
Volcanic eruptions are powerful, spectacular, uncontrollable geophysical events which require management to mitigate loss of life and property. An essential part of volcanic risk management is to quantify the vulnerability of exposed elements of society to volcanic hazard. Agriculture takes advantage of the fertile soils of volcanic regions, but is vulnerable to damage and disruption from volcanic hazards, in particular ashfall. This thesis investigates the vulnerability of pastoral agriculture to volcanic ashfall by examining impacts on the resource base of pastoral farming (water supply, pas
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8

Wardman, John Blackburn. "Vulnerability of Electric Power Systems to Volcanic Ashfall Hazards." Thesis, University of Canterbury. Geological Sciences, 2013. http://hdl.handle.net/10092/8014.

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Анотація:
Volcanic eruptions are powerful natural events which impact strongly on society. As human populations grow and expand into volcanically active areas, their exposure and vulnerability to volcanic hazards is also increasing. Of all volcanic hazards, ashfall is the most likely to impact lifelines because of the large areas affected. The widespread dispersal of ash can cause large-scale disruption of vital infrastructure services, aviation, and primary production. Electric power supply is arguably the most crucial of modern infrastructure systems, especially considering the dependence of other sec
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9

Matoza, Robin S. "Seismic and infrasonic source processes in volcanic fluid systems." Diss., [La Jolla] : University of California, San Diego, 2009. http://wwwlib.umi.com/cr/ucsd/fullcit?p3386569.

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Анотація:
Thesis (Ph. D.)--University of California, San Diego, 2009.<br>Title from first page of PDF file (viewed January 19, 2010). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references (p. 219-246).
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10

Belien, Isolde L. M. B. (Leo Maria Beatrijs) 1985. "Gas Migration Through Crystal-Rich Mafic Volcanic Systems and Application to Stromboli Volcano, Aeolian Islands, Italy." Thesis, University of Oregon, 2011. http://hdl.handle.net/1794/12107.

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Анотація:
xvii, 171 p. : ill. (some col.)<br>Crystals influence the migration of gas through magma. At low concentrations, they increase the bulk fluid properties, especially viscosity. At concentrations close to maximum packing, crystals form a rigid framework and magma cannot erupt. However, erupted pyroclasts with crystal contents close to the packing concentration are common at mafic volcanoes that exhibit Strombolian behavior. In this dissertation, I study the influence of solid particles on gas migration. I apply my results to Stromboli volcano, Italy, type locality of the normal Strombolian erupt
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11

Farquharson, James. "Permeability evolution in volcanic systems : field, laboratory, and numerical investigations." Thesis, Strasbourg, 2016. http://www.theses.fr/2016STRAH018/document.

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Анотація:
La perméabilité est une propriété essentielle notamment pour déterminer la nature explosive des volcans, ainsi que pour de nombreuses autres applications scientifiques et industrielles dans les environnements où l'écoulement du fluide est une préoccupation majeure. Combinant des méthodes expérimentales de déformation des roches en laboratoire, des approches de terrain, de la modélisation numérique, et des analyses systématiques de microstructure, ce travail a mis en évidence le caractère complexe de la formation et la destruction des réseaux poreux dans le magma et des roches volcaniques. La c
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12

Kent, Russell Malcolm. "Modelling fluid flow and heat transfer in some volcanic systems." Thesis, Lancaster University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.306912.

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13

McLean, Charlotte Elizabeth. "Shallow magmatic plumbing systems and edifices of monogenetic volcanic fields." Thesis, University of Glasgow, 2017. http://theses.gla.ac.uk/8418/.

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Анотація:
Magmatic plumbing systems of monogenetic volcanic fields comprise an interconnected network of sills, dykes and inclined sheets; however, the morphology, distribution and emplacement mechanisms of these shallow plumbing systems are often overlooked due to the lack of observable field data. Using seismic data provides an opportunity to understand these systems and integrate seismic-scale features with macro-scale observations from the field. Using a seismic dataset from the Faroe-Shetland Basin, NW Scotland, the Ben Nevis Monogenetic Volcanic Field (BNVF), this research provides an insight into
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14

Darnell, Amii Rebecca. "Application of geographical information systems to lahar hazard assessment on an active volcanic system." Thesis, University of East Anglia, 2010. https://ueaeprints.uea.ac.uk/47533/.

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Анотація:
Lahars (highly dynamic mixtures of volcanic debris and water) have been responsible for some of the most serious volcanic disasters and have killed tens of thousands of people in recent decades. Despite considerable lahar model development in the sciences, many research tools have proved wholly unsuitable for practical application on an active volcanic system where it is difficult to obtain field measurements. In addition, geographic information systems are tools that offer a great potential to explore, model and map hazards, but are currently under-utilised for lahar hazard assessment. This r
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15

Faizy, Shelly Mardhia. "Assessing a Modeling Standard in Volcanic-Geothermal Systems: the Effects of the Lower System Boundary." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-438664.

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Анотація:
Geothermal energy consumption is projected to increase along with other renewable energy in the future. Therefore, it is important to have a better understanding on the evolution of geothermal systems to optimize the exploitation of such resources. Generally, numerical models are used as a fundamental tool to study a potential geothermal field. However, current modeling practices tend to focus on the shallow area around the heat source, while ignoring the deeper part below the heat source. The purpose of this project is to observe the influence of lower boundary at the bottom of intrusion towa
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16

Lamur, A. L. "Development, impact and longevity of fractures in magmatic, volcanic and geothermal systems." Thesis, University of Liverpool, 2018. http://livrepository.liverpool.ac.uk/3019206/.

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Анотація:
The migration of fluids in the Earth’s crust embodies the last stage of the internal heat release of our planet. Either spectacularly expressed at the surface through volcanic activity, or more subtly as internal hydrothermal circulation, this phenomenon involves the upwards motion of fluids and magmas that contribute to more efficient heat transfer. On one hand, volcanic eruptions result from the movement of buoyant magmatic liquids towards the surface. On their way up, these magmas cool down, crystallise and upon decompression, build up an internal pressure that dictate the eruptive style: E
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17

Kushnir, Alexandra Roma Larisa. "Permeability development and evolution in volcanic systems : insights from nature and laboratory experiments." Thesis, Orléans, 2016. http://www.theses.fr/2016ORLE2006/document.

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Анотація:
La transition entre le comportement effusif et explosif des volcans de magma riche en silice est en partie contrôlée par la capacité des surpressions gazeuses à se dissiper hors du magma. La libération efficace des gaz est associée aux éruptions effusives tandis que la rétention de ces gaz contribue aux processus explosifs. L’une des approches pour évaluer la facilité d’échappement des gaz est de considérer l’évolution et le développement de la perméabilité dans la colonne magmatique et dans l'édifice. J'évalue dans ce travail de thèse le rôle des changements post-mise en place sur la microstr
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18

Sirinyildiz, Tunc. "Integration Of Geophysical - Geological Data Using Geographic Information Systems." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/1206374/index.pdf.

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Анотація:
This study attempts to integrate geophysical data with other spatial data using Geographic Information Systems (GIS). The study is carried out in a part of Galatean Volcanic Province, north of Ankara. Gravity, magnetic, topographic, rock type and volcanic eruption center data are the data layers used in the study. All data layers are converted to raster format with a grid spacing of 100 m. The first step in the analysis is the pair-wise analyses of all data layers. For the geophysical data, different layers for the depths of 1 to 5 km are generated. All paired analyses indicate that geophysic
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19

Budd, David A. "Characterising volcanic magma plumbing systems : A tool to improve eruption forecasting at hazardous volcanoes." Doctoral thesis, Uppsala universitet, Mineralogi, petrologi och tektonik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-267473.

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This thesis attempts to develop our understanding of volcanic magma plumbing systems and the magmatic processes that operate within them, such as fractional crystallisation, crustal partial melting, assimilation, and magma mixing. I utilise petrology, rock and mineral geochemistry, and isotope systematics to seek to improve our ability to forecast the eruptive frequency and style of active volcanoes, an aspect often lacking in current volcano monitoring efforts. In particular, magma reservoir dynamics are investigated from a mineral scale at Katla volcano in Iceland, to a sub-mineral scale at
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20

Davidson, Jonathan Robert Joseph. "The Effect of Fractures on Fluid Flow in Geothermal Systems, Taupo Volcanic Zone, New Zealand." Thesis, University of Canterbury. Department of Geological Sciences, 2014. http://hdl.handle.net/10092/9566.

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The goal of this thesis is to evaluate the effect of fractures on the bulk permeability of rocks. Several methods are used to address this problem: 1) surface radon gas measurements, 2) stress induced fracture permeability 3) fracture generation conditions. Each method was variably effective in providing answer to the initial question. The radioactive radon isotopes (220Rn and 222Rn) were measured in soil gas extracted from 1 m depth in two areas and the concentrations for both isotopes tended to be higher near mapped faults. Soil samples recovered from 1 m depth indicate that the isotopic an
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21

AGOSTINI, CLAUDIA. "Crystallization kinetics: a probe of magmatic and eruptive processes for Stromboli and Pantelleria volcanic systems." Doctoral thesis, Università degli Studi di Camerino, 2013. http://hdl.handle.net/11581/401842.

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22

Riker, Jenny Michelle. "Experimental constraints on volatile-driven crystallisation in volcanic systems: A case study at Mount St. Helens." Thesis, University of Bristol, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.629006.

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Анотація:
Degassing and crystallisation are concomitant processes in volcanic systems that together modulate the physico-chemical properties of magmas. The compositions and textures of crystal-bearing volcanic rocks therefore preserve valuable information about the degassing paths experienced by their host magmas. Accurate interpretation of the rock record, however, requires a detailed interpretive framework. This thesis presents the results of high-temperature, high-pressure experiments designed to clarify the mechanisms and manifestations of volatile-driven crystallisation in natural magmas. The well-
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23

Raithatha, Bansri Gitesh. "The sealing potential of volcanic rocks in hydrocarbon systems : a case study from the Rosebank Field." Thesis, Durham University, 2017. http://etheses.dur.ac.uk/11978/.

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Анотація:
Hydrocarbon exploration in frontier regions has resulted in a series of discoveries within intra- and sub-volcanic basins along the NE Atlantic margin. The majority of these basins are blanketed by varying thicknesses of subaerial lavas and volcaniclastic sequences that form the Paleogene-aged North Atlantic Igneous Province. During Exploratory drilling in 2004, the 213/27-1Z well encountered two oil and gas accumulation with a total pay thickness of 52 metres, within the Late Palaeocene-Early Eocene aged Colsay Member sandstones within the Rosebank Field. These hydrocarbon-bearing reservoir i
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24

Atlas, Zachary D. "Volatiles in Melt Inclusions from Mexican and Nicaraguan Volcanoes: Implications for Complex Degassing Processes." Scholarly Repository, 2008. http://scholarlyrepository.miami.edu/oa_dissertations/142.

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Анотація:
The first section of this work examines melt inclusions in phenocrysts from Volcán Popocatépetl and Volcán de Colima within the Trans Mexican Volcanic Belt (TMVB). These inclusions are dacitic to rhyolitic. Trends in melt inclusion major element and water concentrations form the evolved extension of other Mexican volcanics including those presumably derived directly from primitive melts. Water concentrations in Popocatépetl and Colima melt inclusions are similar (0.3 to 3.4 weight percent Hsub2O). Melt-vapor equilibration pressures calculated from dissolved Hsub2O and COsub2 (Popocatépetl)
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25

Kraus, Stefan. "Magmatic dyke systems of the South Shetland Islands volcanic arc (West Antarctica) reflections of the geodynamic history /." Diss., [S.l.] : [s.n.], 2005. http://edoc.ub.uni-muenchen.de/archive/00003827/.

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26

Montanaro, Cristian [Verfasser], and Bettina [Akademischer Betreuer] Scheu. "A multidisciplinary approach to unravel the steam-driven eruptions in volcanic systems / Cristian Montanaro ; Betreuer: Bettina Scheu." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2016. http://d-nb.info/1114068195/34.

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27

Randazzo, Loredana Antonella. "The behaviour of trace elements during the volcanic ash-liquid interaction : example of marine and human systems." Thesis, Lyon 1, 2011. http://www.theses.fr/2011LYO10051.

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Анотація:
Les processus d’interaction solide-liquide régulent les mécanismes qui régissent la disponibilité des oligo-éléments en phase liquide. Dans cet article, ces processus ont été étudiés grâce à l'utilisation des éléments de terres rares (REE), car ils sont d'excellents traceurs des processus géochimiques. Le but de la première partie de ce travail était d'étudier la réactivité des particules volcaniques lors de l'interaction avec l'eau de la mer synthétique. Les résultats montrent que en dehors de la dissolution, qui est le processus principal, un procédé d'adsorption de surface se produit égalem
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28

Kaye, Grant David. "Volcanic hazard risk assessment for the RiskScape program, with test application in Rotorua, New Zealand, and Mammoth Lakes, USA." Thesis, University of Canterbury. Geological Sciences, 2008. http://hdl.handle.net/10092/1950.

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This thesis presents a new GIS-based scenario volcanic risk assessment model called RiskScape Volcano (RSV) that has been designed for the RiskScape program to advance the field of volcanic risk assessment. RiskScape is a natural hazards risk assessment software tool being developed in New Zealand by GNS Science and NIWA. When integrated into RiskScape, RSV will add proximal volcanic hazard risk assessment capability, and enhanced inventory design; it presently operates outside of RiskScape by combining volcanic hazard models’ output spatial hazard intensity (hazard maps) with inventory databa
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29

Romero, Mujalli Gibran [Verfasser], and Jens [Akademischer Betreuer] Hartmann. "The role of temperature in processes controlling weathering rates of carbonate lithologies and volcanic systems / Gibran Romero Mujalli ; Betreuer: Jens Hartmann." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2019. http://d-nb.info/1187921734/34.

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30

Lupi, Matteo. "High-resolution simulations of fluid flow in active hydrothermal systems : applications to the Tjornes Fracture Zone and Askja Volcanic complex in Iceland." Thesis, Heriot-Watt University, 2010. http://hdl.handle.net/10399/2357.

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This study provides new insights into the transient uid ow dynamics that characterise high temperature hydrothermal systems. So far, these kind of studies have used process models that tend to over-simplify the geology and focus instead on the physical processes, hence not revealing the hidden behaviour that depends on the complex geological structures often encountered in hydrothermal systems. This study is one of the rst examples where high resolution numerical simulations in two and three dimensions have been applied to hydrothermal systems in order to preserve geological detail in the mode
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31

Konchi, Wakgari Furi. "Hydrogeology of complex volcanic systems in continental rifted zone : integrated geochimical, geophysical and hydrodynamic approach : Middle Awash basin, Main Ethiopian Rift, Ethiopia." Poitiers, 2010. http://theses.edel.univ-poitiers.fr/theses/2010/Konchi-Wakgari-Furi/2010-Konchi-Wakgari-Furi-These.pdf.

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Middle Awash basin, located in the complex volcanic centre of the Ethiopian Rift valley, is one of the drought prone areas marked by considerable water supply problems. Due to lack of surface waters, groundwater remains the sole resource supplying water for domestic and livestock. However, its effective use has been hampered due to the complex aquifer system of this basin. In this study, multidisciplinary method has been applied to characterize the hydrogeological system of this complex volcanic basin. The combined results from datasets show two distinct aquifer systems linked to geology and p
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32

Hernandez, Lindsey Danielle. "Magma Plumbing Systems along the Juan de Fuca Ridge." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1587630136962186.

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33

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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34

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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35

Keith, Manuel [Verfasser], and Karsten [Akademischer Betreuer] Haase. "From active submarine vent systems to fossil volcanic-hosted massive sulphide deposits: an in-situ analytical study of hydrothermal sulphides / Manuel Keith. Gutachter: Karsten Haase." Erlangen : Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 2015. http://d-nb.info/1080362703/34.

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36

Needy, Sarah Katherine. "Tracking the Evolution of Mid Cenozoic Silicic Magma Systems in the Southern Chocolate Mountains Region, California Using Zircon Geochemistry and Quartz and Zircon Geothermometry." Thesis, Connect to resource online, 2009. http://hdl.handle.net/1805/1953.

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Анотація:
Thesis (M.S.)--Indiana University, 2009.<br>Department of Earth Sciences, Indiana University-Purdue University Indianapolis (IUPUI). Advisor(s): Andrew P. Barth, Gabriel Filippelli, Jeffery Wilson. Includes vitae. Includes bibliographical references (leaves 62-64).
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37

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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Анотація:
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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38

[Verfasser], Budi Joko Purnomo, Thomas [Akademischer Betreuer] Pichler, and Peter [Akademischer Betreuer] LaFemina. "Geothermal systems in the Sunda volcanic island arc : Investigations on the islands of Java and Bali, Indonesia / Budi Joko Purnomo. Gutachter: Thomas Pichler ; Peter LaFemina. Betreuer: Thomas Pichler." Bremen : Staats- und Universitätsbibliothek Bremen, 2015. http://d-nb.info/1072304244/34.

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39

Maussen, Katharine. "Carbon dioxide transport through Taal volcano’s hydrothermal system and Main Crater Lake (Philippines)." Doctoral thesis, Universite Libre de Bruxelles, 2018. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/271649.

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Анотація:
The presence of a hydrothermal system at Taal volcano is evident from the presence of a craterlake (Main Crater Lake, MCL), a caldera lake (Lake Taal) and several hot springs on the flanksof Taal volcano island and in the crater. Taal MCL, covering an area of 1.2 km², is acidic (pH= 3), warm (T = 30-33 °C) and its composition is dominated by Cl, Na and SO4. This thesisaims at understanding the geochemistry of Taal volcano’s hydrothermal system and the wayCO2 is transported through the hydrothermal system and MCL towards the atmosphere.The long-term geochemical evolution of MCL indicates that t
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40

Peers, Justin, Ashleigh Reeves, Christopher Gregg, Michael K. Lindell, and Andrew Joyner. "Improving volcano risk communication at the Long Valley Caldera and Mono-Inyo Craters volcanic system, eastern California, USA." Digital Commons @ East Tennessee State University, 2018. https://dc.etsu.edu/asrf/2018/schedule/4.

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Exposure to volcano hazards can lead to crises; with or without an eruptive event. Therefore, it is important to distinguish that volcanic events (unrest & eruptions) are physical phenomena while volcanic crises are social. Volcanic eruptions, unlike some other geologic hazards are often preceded by weeks or months of precursors, which offer the opportunity to reduce risk by early intervention. However, resistance to discussion of local hazards can hinder stakeholders’ (emergency managers, scientists, etc.) ability to mitigate volcano hazards and create well-informed protocols to respond when
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41

Tambe-Ebot, Mathias Ashu Tako. "Proposing a Theoretical GIS Model for Landslides Analysis : The Case of Mount Cameroon." Thesis, Linköpings universitet, Institutionen för datavetenskap, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-65899.

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This study presents a theoretical GIS model to investigate the relative impacts of geomorphic and environmental factors that govern the occurrence of landslides on the slopes of Mount Cameroon and its surrounding areas. The study area is located along the Cameroon Volcanic Line (CVL), a major structural feature that originates from the south Atlantic and continues into the continental landmass. The quite frequent seismic activity, geologic character, humid tropical climate and high human pressure on hill slopes are the major factors behind the occurrence of landslides in Mount Cameroon. This p
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42

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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43

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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Анотація:
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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44

Blacic, Tanya Marie. "Magma supply and storage in volcanic systems : shallow crustal emplacement processes and causes of the large axial high along the western Galápagos Spreading Center, and relation of earthquakes to tectonic and magmatic features near Lassen Peak, northern California /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2005. http://uclibs.org/PID/11984.

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45

Arnott, Stuart K. "A seismic study of the Krafla volcanic system, Iceland." Thesis, Durham University, 1990. http://etheses.dur.ac.uk/6526/.

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Following a major crustal rifting episode centred on the Krafla volcanic system in Northeast Iceland, the local seismicity was monitored for three months using a dense network of single component seismometers. Initial earthquake locations were computed for 489 local events using a one-dimensional velocity model derived from seismic refraction data. Activity was concentrated in clusters beneath a geothermal area within the Krafla caldera and below the Bjarnarflag geothermal well field to the south, and in a narrow linear zone coincident with a site of recent dyke injection. Events of magnitudes
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46

Loughlin, Susan C. "The evolution of the Eyjafjöll volcanic system, southern Iceland." Thesis, Durham University, 1995. http://etheses.dur.ac.uk/1456/.

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47

Kaikkonen, R. (Riina). "Evolution of basaltic lavas of the Kverkfjöll volcanic system, Northern Volcanic Zone, Iceland:evidence from in-situ LA-ICP-MS analyses." Master's thesis, University of Oulu, 2017. http://urn.fi/URN:NBN:fi:oulu-201704191514.

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This study deals with the evolution of the basaltic lavas of the Kverkfjöll volcanic system, which is located at the eastern edge of the Northern Volcanic Zone in central Iceland. The aim of this study is to model the melt and mineral evolution of the collected basaltic sample series by utilizing major and trace element data. The sample set consists of separated glass shards and plagioclase, olivine and clinopyroxene macrocrystals (d>500 µm). In addition, the glass shards contain microcrystals (d1 in specific minerals. Incompatible elements are enriched in evolved glasses and in general show h
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48

Lee, Sang Hee. "The responses of the respiratory system when exposed to volcanic ash." Thesis, Cardiff University, 2004. http://orca.cf.ac.uk/55387/.

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The toxicological investigations demonstrated quite clearly the different toxicological properties of the MA, CRS and ANR. The CRS proved to be fibrogenic in rat lung with a 5.0mg single instillation dose after long-term (1 year) exposure whereas ANR was minimally bioreactive. The MA did not cause inflammation in the lung until 49 weeks post-instillation even though size augmentation with granuloma formation in thoracic lymph nodes were recognised at 13 weeks. These findings suggested that the size and granuloma formation of thoracic lymph nodes were good early markers to assess the toxicity o
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49

Roberts, Katie Sarah. "Mud volcano systems : structure, evolution and processes." Thesis, Durham University, 2011. http://etheses.dur.ac.uk/752/.

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Mud volcano systems erupt sediment and fluid onto the Earth’s surface producing edifices up to 25 km3 in volume however, little is known about how such volumes are transported through the Earth’s crust. This thesis investigates whether transport is through mud-dyke-sill complexes, or is diapiric. Structural field mapping of exhumed mud volcano intrusive domains onshore in Azerbaijan, shows that feeder complexes are 200-800 m wide and roughly circular. These complexes consist of various fracture networks and a megabreccia of country rock blocks tens-of-metres-across that have rotated up to 90°
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50

Schmidt, Anja. "Modelling tropospheric volcanic aerosol : from aerosol microphysical processes to Earth system impacts." Thesis, University of Leeds, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.540764.

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