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Dissertations / Theses on the topic 'Basalt'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Qi, Liang. "Determination of trace platinum group elements in geological samples application to Emeishan flood basalts in SW China /." Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/hkuto/record/B38791079.

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2

Rossetti, Marcos de Magalhães May. "Evolução do vulcanismo histórico de 1580 A.D. da Ilha de São Jorge, Arquipélago dos Açores." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2017. http://hdl.handle.net/10183/153372.

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A erupção histórica de 1580 A.D. ocorreu ao sudoeste da Ilha de São Jorge, Açores recobrindo uma área total de 4 km². Este trabalho teve como objetivo caracterizar as diferentes morfologias de lava de 1580 A.D, juntamente com a definição de padrões petrográficos e geoquímicos. A erupção gerou quatro flow fields: Ribeira do Almeida, Queimada, Ribeira do Nabo I e Ribeira do Nabo II. A descrição detalhada das lavas permitiu identificar spiny, sheet, e slabby pahoehoe e derrames do tipo ‘a´ā. Próximo aos cones, derrames do tipo ‘a´ā são descritos. Com a constante erupção, estas lavas fluem em dire

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3

Chironi, Caterina. "Sub-basalt seismic imaging." Thesis, Imperial College London, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.410001.

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4

Hamed, Sarah. "Shear Contribution of Basalt Fiber-Reinforced Concrete Reinforced with Basalt Fiber-Reinforced Polymer Bars." Master's thesis, Université Laval, 2019. http://hdl.handle.net/20.500.11794/34008.

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Cette étude évalue expérimentalement et analytiquement le comportement au cisaillement des poutres en béton renforcé de fibres de basalte (BRFB) renforcées longitudinalement avec des barres en polymère renforcé de fibres de basalte (PRFB). Un nouveau type de macro-fibres de basalte a été ajouté au mélange de béton pour produire le mélange de BRFB. Quatorze poutres (152 x 254 x 2000 mm) sans armature transversale ajouté ont été testées sous une configuration de chargement à quatre points jusqu'à la défaillance. Les poutres ont été regroupés en deux groupes A et B en fonction de leurs rapports p

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5

Stockmann, Gabrielle J. "Experimental study of basalt carbonatization." Toulouse 3, 2012. http://thesesups.ups-tlse.fr/1572/.

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La concentration croissante de CO2 dans l'atmosphère et les dangers potentiels qu'elle représente pour la terre au travers des changements climatiques, l'acidification des océans et l'élévation du niveau de la mer a conduit à un certain nombre de projets qui tentent de trouver un moyen sûr et inoffensifs pour capturer et stocker le CO2 dans des formations géologiques. Une de ces tentatives se déroule actuellement en Islande à la centrale géothermique Hellisheiði, située à proximité de la capitale, Reykjavik (le projet CarbFix). Le dioxyde de carbone et d'autres gaz comme H2S, N2, H2, CH4, et A

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6

Bishop, Carolyn Wagoner 1947. "Hydraulic properties of vesicular basalt." Thesis, The University of Arizona, 1991. http://hdl.handle.net/10150/291554.

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Laboratory experiments were conducted on vesicular basalt cores to estimate hydraulic properties. Properties included dry bulk density, effective porosity, skeletal density, saturated hydraulic conductivity and determination of moisture characteristic curves. Unsaturated hydraulic properties estimated included hydraulic conductivity and diffusivity as a function of matrix suction. Infiltration tests were run on a larger block of the same basalt. Infiltration curves were developed and saturated hydraulic conductivity estimated.

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7

Singh, Shantanu Kumar. "Sub-basalt imaging: modeling and demultiple." Texas A&M University, 2005. http://hdl.handle.net/1969.1/3315.

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Seismic imaging of sub-basalt sedimentary layers is difficult due to high impedance of the basalt layer, the roughness of the top and bottom of the basalt layer and sometimes the heterogeneities within the basalt layer. In this thesis we identify specific problems within the modern imaging technology which limit sub-basalt imaging. The basic framework for the identification of this limitation is that we are able to group most basalt layers into the following four categories: A basalt layer having smooth top and bottom surfaces. A basalt layer having rough top and bottom surfaces. Small-scale h

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8

Martyn, Kendal Roger. "The relationship between the geochemistry of spinel peridotite nodules and alkali basalt." Thesis, University of Cambridge, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.340974.

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9

Qi, Liang, and 漆亮. "Determination of trace platinum group elements in geological samples: application to Emeishan flood basalts in SWChina." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B38791079.

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10

Sweeney, Russell James, and Russell James Sweeney. "Geochemistry of the Sabie River Basalt Formation in the central Lebombo, Karoo Igneous Province." Doctoral thesis, University of Cape Town, 1988. http://hdl.handle.net/11427/23637.

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The Sabie River Basalt Formation is a group of tholeiitic basaltic rocks erupted ca 190 Ma ago in the eastern zone of the Karoo Igneous Province of southern Africa. It is traceable over a distance of 700 km from Zululand, northwards along the Lebombo monocline into the Transvaal and south-east Zimbabwe. An abrupt compositional change in this formation occurs about halfway down its length in the vicinity of the Sabie and Komati Rivers: basalts to the north are known to be enriched in certain incompatible elements relative to basalts in the south, which are comparable in geochemistry to most bas

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11

Wingrove, Dennis. "Early mixing in the evolution of alkaline magmas chemical and oxygen evidence from phenocrysts, Royal Society Range, Antarctica /." Connect to this title online, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=bgsu1116257410.

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12

Darold, Amberlee, and Amberlee Darold. "Resolving Upper Mantle Seismic Structure Beneath the Pacific Northwest and Inferred Plume-Lithosphere Interactions During the Steens-Columbia River Flood Basalt Eruptions." Thesis, University of Oregon, 2012. http://hdl.handle.net/1794/12365.

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Cenozoic tectonics of the Pacific Northwest (PNW) and the associated mantle structures are remarkable, the latter revealed by EarthScope seismic data. In this thesis we model teleseismic body waves constrained by ambient-noise surface waves and teleseismic receiver function analysis in order to recover better-controlled higher resolution images of the PNW continuously from the surface of the crust to the base of the upper mantle. We focus on and have clearly imaged two major upper mantle structures: (1) the high-velocity Farallon slab (the "Siletzia curtain") extending vertically beneath the C

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13

Mallory-Greenough, Leanne M. "Predynastic and First Dynasty Egyptian basalt vessels." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0020/NQ53818.pdf.

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14

McKenna, John. "Morphodynamics and sediments of basalt shore platforms." Thesis, University of Ulster, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.481098.

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15

Arena, Michele Correia. "Petrologia da sucessão magmática do Arquipélago de Abrolhos." Universidade do Estado do Rio de Janeiro, 2008. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=722.

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A Sucessão Magmática do Arquipélago de Abrolhos é composta por quatro unidades, quais sejam: Olivina-Plagioclásio Basalto (b1), Piroxênio-Plagioclásio-Olivina Basalto (b2), Piroxênio-Plagioclásio Basalto (b3) e Cumulado (b4). As unidades não são correlacionáveis litoestratigraficamente e estão empilhadas da base para o topo em unidade b1, b2, b3 e b4. As unidades da sucessão magmática são diferentes quanto à textura, estrutura e mineralogia. A análise litogeoquímica de vinte e três amostras de rochas basálticas das unidades da sucessão magmática discriminou uma série transicional de afinidade

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16

Sullivan, George Edward. "The Petrogenetic significance of melt inclusion and phenocryst compositions in Phyric Basalts from the Kane Fracture Zone and vicinity, 23-̊28 ̊N Mid-Atlantic ridge /." Access abstract and link to full text, 1989. http://0-wwwlib.umi.com.library.utulsa.edu/dissertations/fullcit/9015229.

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17

Trotsek, Dylan. "Flexural Behavior of Concrete Using Basalt FRP Rebar." Thesis, Florida Atlantic University, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10616626.

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<p> The objective of this research is to determine if the deflection equations currently adopted in ACI 440.1r-15 and previously ACI 440.1r-06 accurately reflect the flexural behavior of an over-reinforced Basalt Fiber Reinforced Polymer (BFRP) concrete beam. This was accomplished with experimental, analytical and numerical models. The experiment consisted of two beams doubly-reinforced with BFRP rebar. A three-point flexural test on beams with a 30 in. clear span was performed and the deflections were recorded with a dial gauge and LVDT system. This data was compared to the equations from ACI

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18

Aceman, Sheila. "Simulated organic acid weathering of granodiorite and basalt." Thesis, University of British Columbia, 1989. http://hdl.handle.net/2429/27386.

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Basalt and granodiorite (medium to fine sand particle size) were leached by three low molecular weight aliphatic organic acids, namely citric, oxalic and acetic acid of . 1M concentration. To evaluate the effectiveness of the organic acids in dissolving the rock samples, two control solutions, .005M HCl and distilled water were added to the number of dissolution treatments. Dissolution of ions from granodiorite, by the leaching treatment shown in parenthesis, decreased in the following order: Fe(OX) > Al(OX) ~ Si(OX) > Ca(CIT) ~ Mg(OX) ~ K(OX) > Na(OX) Dissolution of ions from basalt decreas

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19

Gaitzsch, Jens. "500 Jahre Ersterwähnung Stolpener Basalt: Eine kurze Kulturgeschichte." Jens Gaitzsch, 2020. https://slub.qucosa.de/id/qucosa%3A72864.

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Das heutige Naturdenkmal Stolpener Basalt (Nationaler Geotop) kann auf eine lange und vielseitige kulturgeschichtliche Entwicklung verweisen. Seine schriftliche Ersterwähnung lag in der Zeit der Reformationsauseinandersetzungen und jährt sich 2020 zum 500. Mal.

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20

Chaffey, David John. "Characterisation of ocean island basalt sources : St. Helena." Thesis, University of Leeds, 1988. http://etheses.whiterose.ac.uk/625/.

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The extrusive and intrusive members of the St. Helena rock suite (SHRS) are formed in an intra-oceanic plate tectonic setting as part of two shield volcanoes. The SHRS vary from picrobasalts to phonofites. The former represent mantle derived melts, whereas the remainder of the suite have undergone differing degrees of crystal fractionation. A stratigraphic framework is developed to illustrate temporal geochemical variations over 2 Ma of subaerial activity. This is accomplished in conjunction with a detailed field study of the SHRS by Baker(1968) which is shown to be largely accurate. It is dem

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21

Trone, Paul M. "Textural and mineralogical characteristics of altered Grande Ronde basalt, northeastern Oregon : a natural analog for a nuclear waste repository in basalt." PDXScholar, 1987. https://pdxscholar.library.pdx.edu/open_access_etds/3824.

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Altered flows that are low-MgO chemical types of the Grande Ronde Basalt crop out in the steep walls of the Grande Ronde River canyon near Troy, Wallowa County, Oregon. The alteration effects in these flows are being investigated as a natural analog system to a high level nuclear waste repository in basalt. The flows within the study are referred to as the analog flow, in which the alteration effects are the strongest, and the superjacent flow. The analog flow crops out at Grande Ronde River level and a roadcut-outcrop is developed in the flow-top breccia of this flow. The two flows have been

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22

Reindel, Jenna L. "The Origin of Basalt and Cause of Melting Beneath East Antarctica as Revealed by the Southernmost Volcanoes on Earth." Bowling Green State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1542379105898001.

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23

Liu, Jianwen. "Untersuchung von Verbundwerkstoffen mit Basalt- und PBO-Faser-Verstärkung." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2008. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1205926921343-19844.

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Zur Erweiterung der Grundlagenkenntnisse für diese beiden bisher wenig genutzten Verstärkungsfasern werden in dieser Arbeit Einzelfaserzugversuche durchgeführt, um den Einfluss der Prüfbedingungen und der Faseroberflächenbehandlungen auf die mechanischen Eigenschaften der Fasern zu charakterisieren. Durch die Analysen der unimodalen und bimodalen Weibullverteilung wird der Zusammenhang zwischen der Faserzugfestigkeit und den kritischen Oberflächendefekten untersucht. Um den Einfluss der Faseroberflächenbehandlungen auf die Oberflächenenergien und Grenzflächenhaftung zu ermitteln, werden in die

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24

Perry, Anna F. Parker Donnie Franklin. "Petrology of Cascade Head Basalt, Oregon Coast Range, USA." Waco, Tex. : Baylor University, 2007. http://hdl.handle.net/2104/5079.

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25

Hanssen, Peter. "The influence of basalt layers on seismic wave propagation." Thesis, University of Edinburgh, 2003. http://hdl.handle.net/1842/497.

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Large areas of the Earth are covered by intrusive and extrusive lavas, forming high velocity basalts, which are often opaque to cinventional seismicreflection surveys. On the North East Atlantic margin these basalts cover sediments in whose lateral extension away from the basalt cover proven hydrocarbon reservoirs and source rocks exist. To reveal the comparable structures that are expected to exist beneath the basalt cover novel seismic methods are required. The primary objectives of this thesis are to examine the effects of basalts on seismic wave propagation and the concequent implications

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26

Palme, Jahi. "Investigation of the Addition of Basalt Fibres into Cement." TopSCHOLAR®, 2014. http://digitalcommons.wku.edu/theses/1361.

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Mechanical properties of concrete are most commonly determined using destructive tests including: compression, flexure, and fracture notch specimen tests. However, nondestructive tests exist for evaluating the properties of concrete such as ultrasonic pulse velocity and impact echo tests. One of major issues with concrete (which has cement as its prime ingredient) is that unlike steel it is quasi-brittle material. It tends to want to crack when tensile stresses develop. Fibres have been added to concrete for many years to reduce the amount of and size of cracks cause by temperature changes or

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27

Betts, Alison Venetia Graham. "The prehistory of the basalt desert, Transjordan : an analysis." Thesis, University College London (University of London), 1986. http://discovery.ucl.ac.uk/1348996/.

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The content of this thesis is based on original fieldwork by the candidate in the Black Desert, the basalt region of eastern Jordan. Very little is known about the prehistoric sequence of occupation in the area. The thesis attempts to outline this sequence through analysis of the survey data, and compare it to existing information from the better documented areas of Palestine and Syria. The first chapter describes the environment of the study area, both at present and in history, and sets out the survey and sampling techniques used in the study. The second chapter gives a brief description of

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28

Liu, Jianwen. "Untersuchung von Verbundwerkstoffen mit Basalt- und PBO-Faser-Verstärkung." Doctoral thesis, Technische Universität Dresden, 2007. https://tud.qucosa.de/id/qucosa%3A24101.

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Zur Erweiterung der Grundlagenkenntnisse für diese beiden bisher wenig genutzten Verstärkungsfasern werden in dieser Arbeit Einzelfaserzugversuche durchgeführt, um den Einfluss der Prüfbedingungen und der Faseroberflächenbehandlungen auf die mechanischen Eigenschaften der Fasern zu charakterisieren. Durch die Analysen der unimodalen und bimodalen Weibullverteilung wird der Zusammenhang zwischen der Faserzugfestigkeit und den kritischen Oberflächendefekten untersucht. Um den Einfluss der Faseroberflächenbehandlungen auf die Oberflächenenergien und Grenzflächenhaftung zu ermitteln, werden in die

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29

Weismiller, Heather C. "Sediment Accumulation on Basalt Flows (Jurassic Kalkrand Formation, Namibia)." Ohio University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1338565913.

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30

Abbas, Usama. "Materials Development of Steel-and Basalt Fiber-Reinforced Concretes." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for konstruksjonsteknikk, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-24224.

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Concrete is a structural composite material with excellent properties when subjected to compression. But the poor ability to resist tensile stresses forces the concrete to be used with reinforcement. Commonly, large continuous steel bars have been applied as reinforcement since mid-1800s to carry the tensile loads. Placing the steel bars takes many man-hours, which contributes to a significant part of the total concrete costs. By eliminating the reinforcement part of the construction work, the costs can be reduced considerably. Fibers have been incorporated into building materials since

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31

Erdman, Linda Ruth. "Chemistry of neogene basalts of British Columbia and the adjacent pacific ocean floor : a test of tectonic discrimination diagrams." Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/24658.

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Seventy-one samples of subalkaline and alkaline basalts from British Columbia and the adjacent Pacific seafloor were analyzed for 33 major, trace and rare earth elements using X-ray flourescence (XRF) and instrumental neutron activation analysis (INAA). These basalts are all less than 22 Ma in age and come from various magmatic belts, each with a distinct, well-known, tectonic setting; (1) Convergent margin (Garibaldi and Pemberton Belts), (2) Back-arc (Chilcotin Basalts), (3) Hotspot (Anahim Volcanic Belt), (4) Incipient rift (Stikine Volcanic Belt), (5) Arc-trench gap (Alert Bay Volcanic Bel

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32

Sajja, Mani Bhushan. "Eco-friendly paving blocks from alkali-activation of basalt powder." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.

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The main aim of the research is to investigate the waste by-products as a sustainable construction material by means of Alkali-activation processes. Nowadays, cement is one of the most significant factors of climate change and global warming. It accounts for 5% to 8% of total emission, which may increase due to the increase in concrete production. In this process, sustainable and eco-products have been chosen. Basalt and metakaolin were chosen as precursors. In this, basalt is the main component of our research. Basalt is an igneous rock formed by the rapid cooling of lava at the surface of

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Vye, Charlotte. "Flow Field Formation and Compositional Variations of Flood Basalt Eruptions." Thesis, Open University, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.518169.

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Characterisation of three lava flow fields from the Columbia River Basalt Group (CRBG), USA, reveals compositional heterogeneity on all scales, from adjacent lava lobes to the intra-crystal scale. Simple flow fields can be traced from vent areas to distal reaches, but those with multiple-layered lobes present a degree of complexity that make lava pathways and eruption sequences difficult to identify. A 3-D model based on field investigation of a single flow field establishes a volcanological context for geochemical sampling. Compositional v.ariation within each flow field suggests that small-s

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34

Quispe, C., D. Lino, J. Rodríguez, and A. Hinostroza. "Concrete cracking control in underwater marine structures using basalt fiber." IOP Publishing Ltd, 2021. http://hdl.handle.net/10757/655950.

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The construction of coastal ports requires the use of materials that meet the demands of the marine environment, to prevent underwater concrete structures from cracking and spalling easily; basalt fiber is used to delay the expansion of concrete and prevent the formation of cracks. This research studies the behavior of concrete for prefabricated piles with Portland Cement Type I and basalt fibers added in 0.1%, 0.3% and 0.6%; the results indicate that the fiber is suitable for concrete, the slump decreases, the compressive strength increases for specimens cured in tap water and sea water, the

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Hvozdyuk, M. Hembara T. "Impact of corrosive medium on fatigue strength of basalt reinforcement." Thesis, Book of Abstract /ХV International Conference «Problems of corrosion and corrosion protection of materials» (Corrosion-2020) (461 event of the European Federation of Corrrrosion) October 15–16, 2020 Lviv, Ukraine, – p.39, 2020. http://sci.ldubgd.edu.ua:8080/jspui/handle/123456789/7468.

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Peixoto, Ricardo Trippia dos Guimaraes. "Surface chemical properties of oxisols derived from Parana basalt (Brazil) /." The Ohio State University, 1995. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487864485231497.

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Borhan, Tumadhir Merawi. "Thermal and structural behaviour of basalt fibre reinforced glass concrete." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/thermal-and-structural-behaviour-of-basalt-fibre-reinforced-glass-concrete(2fcc3a9a-2012-4261-966b-4ff37420e032).html.

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This study aims to produce a type of concrete with both good thermal and mechanical properties by using environmentally friendly and low cost materials. In addition, the resistance of this concrete to fire conditions was investigated. The experimental work comprises two parts. In the first part, recycled glass was used as a partial replacement for natural sand (at proportions 20%, 40% and 60%) together with basalt fibre having different volume fractions (0.1%, 0.3%, and 0.5%). The results obtained from the experimental work showed that the optimum content is 20% glass and at 28 days, there was

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Mrotzek, Ralf. "Wuchsdynamik und Mineralstoffhaushalt der Krautschicht in einem Buchenwald auf Basalt /." Göttingen : Forschungszentrum Waldökosysteme, 1998. http://www.gbv.de/dms/bs/toc/248171879.pdf.

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Peterman, Kenneth James. "Determination of Oxygen Fugacity using Olivine-Melt Equilibrium: Implications for the Redox States of Mid-Ocean Ridge Basalt and Ocean Island Basalt Mantle Source Regions." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1502803559889083.

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McDonald, Michael. "Palaeo-geothermal activity in basaltic lavas of Lower Carboniferous age in the Midland Valley of Scotland." Thesis, University of St Andrews, 1992. http://hdl.handle.net/10023/15574.

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Post-extrusive hydrothermal alteration within basaltic lavas has been examined with special reference to the Lower Carboniferous Clyde Plateau Basalts of the Midland Valley of Scotland. Within this province several steep-sided, narrowly constrained zones of intense water-rock interaction have been located and examined. It is thought that these zones, or metadomains, developed where hydrothermal fluids exploited permeability contrasts within the volcanic pile and as such they represent foci for geothermal fluids which advected through the lavas. In the field metadomains are often manifest as ar

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Coulthard, Daniel A. Jr. "Subduction initiation and igneous petrogenesis: characterizing melt generation at a new convergent boundary through the geochemical analysis of volcanic glass." Thesis, University of Iowa, 2018. https://ir.uiowa.edu/etd/6398.

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The impact of subduction initiation on regional to global tectonics and the compositions of major Earth reservoirs are topics of vigorous ongoing research. Here, pristine glasses extracted from ~51.9 Myr old basalts and younger boninites that erupted in the Izu-Bonin Mariana forearc immediately after subduction initiation were analyzed by microbeam techniques, with goals of characterizing the mantle sources and the conditions under which melting occurred to produce nascent arc crust. Forearc basalts (FAB) have relatively differentiated major element compositions. Thus, to determine melting con

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González, Adriana Maria Sánchez. "Cristalização de um vidro de basalto." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/3/3133/tde-16122014-161458/.

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Os materiais vitrocerâmicos de basalto representam uma importante família de vitrocerâmicos. Sendo que um dos desempenhos técnicos exigidos atualmente é o efeito anti-desgaste dos materiais, as vitrocerâmicas de basalto cobrem essa necessidade e têm uma aplicação direta por suas boas propriedades mecânicas e anti-abrasivas, além da vantagem que têm as rochas basálticas quanto à baixa temperatura de fusão e maior fluidez do fundido, o que as torna mais adequadas para o processamento cerâmico. No presente trabalho, rejeitos da mineração de rocha basáltica da região de Campinas, São Paulo, foram

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McClintock, Murray, and n/a. "Physical volcanology of the Sterkspruit flood basalt crater complex, South Africa." University of Otago. Department of Geology, 2007. http://adt.otago.ac.nz./public/adt-NZDU20070601.161342.

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Volcanism associated with the onset of Karoo flood basalt eruptions (c. 180 Ma) at Sterkspruit, South Africa, began with emplacement of thin lava flows before abruptly switching to phreatomagmatic and magmatic activity that formed a nest of craters, spatter and tuff rings and cones that collectively comprise a crater complex >40 km� filled by 9-18 km� of volcaniclastic debris. Phreatomagmatic activity driven by interaction of Karoo magma with groundwater hosted in country rock and crater-filling debris quarried broad, mainly shallow craters (hundreds of metres, but not kilometers deep) into wa

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Høie, Truls Holm, and Andreas Vermedal. "Vurdering av basalt- og stålfibres effekt og mekaniske egenskaper i jetpeler." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for konstruksjonsteknikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-18554.

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Denne masteroppgaven er en eksperimentell studie av en selvkomprimerende konstruksjonsbetong (styrkeklasse B35) med antiutvaskingsegenskaper armert med enten basaltfiber (monofilament) eller stålfiber. Formålet med oppgaven har vært å undersøke fibrenes effekter på blant annet betongens ferskegenskaper, som eksempelvis synk og synkutbredelse, samt mekaniske egenskaper i herdet tilstand, hovedsakelig bøyestrekkfasthet og trykkfasthet. Motivasjonen for oppgaven har vært et ønske om å øke proporsjonalitetsgrensen for undervannsbetongen, altså bøyestrekkfastheten ved riss, samt å gi betongen dukti

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Elkins, Lynne J. "Basalt petrogenesis beneath slow- and ultraslow-spreading Arctic mid-ocean ridges." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/55327.

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Thesis (Ph. D.)--Joint Program in Marine Geology and Geophysics (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 2009.<br>Includes bibliographical references.<br>To explore the ability of melting mafic lithologies to produce alkaline ocean-island basalts (OIB), an experimental study was carried out measuring clinopyroxene (Cpx)melt and garnet (Gt)-melt partition coefficients during silica-poor garnet pyroxenite melting for a suite of trace elements, including U and Th, at 2.5GPa and 1420-1450°C. Partitio

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Regelous, Marcel. "Geochemistry of dolerites from the Parana flood basalt province, southern Brazil." Thesis, Open University, 1993. http://oro.open.ac.uk/57423/.

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The Cretaceous Parana-Etendeka flood basalt magmatism of South America and Africa was accompanied by intense intrusive activity. This study examines the geochemistry and petrogenesis of dykes from two regions of southern Brazil. Dykes from the Ponta Grossa region of Parana. State fed the basalt lava flows of the northern Parana. The dolerites underwent extensive crystal fractionation at pressures of less than about 5kb, but do not represent parental magmas to the associated rhyolites. The dolerites have received a contribution from a LREE enriched source with time-integrated high RblSr relativ

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Le, Gall Nolwenn. "Ascension et dégazage des magmas basaltiques : approche expérimentale." Thesis, Orléans, 2015. http://www.theses.fr/2015ORLE2044/document.

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Afin de parvenir à une meilleure compréhension de la dynamique d’ascension et d’éruption des magmas basaltiques, nous avons réalisé des expériences de décompression à haute pression (200–25 MPa) et haute température (1200°C) spécifiquement orientées pour documenter la nucléation des bulles de gaz ; ce processus, qui constitue la première étape du dégazage magmatique, conditionne l’évolution de la phase gazeuse (force motrice des éruptions explosives) dans le conduit volcanique. Quatre principaux ensembles d’expériences ont été menés afin de mieux comprendre le rôle des volatils majeurs (H2O, C

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Adhikari, Sudeep. "Mechanical Properties and Flexural Applications of Basalt Fiber Reinforced Polymer (BFRP) Bars." University of Akron / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=akron1259635900.

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Slater, Lucy. "Melt generation beneath Iceland." Thesis, University of Cambridge, 1996. https://www.repository.cam.ac.uk/handle/1810/252247.

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Barker, Charles E. "Physical and geochemical conditions of organic metamorphism next to selected dikes, Victoria, Australia /." Title page, contents and abstract only, 1994. http://web4.library.adelaide.edu.au/theses/09PH/09phb2545.pdf.

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