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Dissertations / Theses on the topic 'Fluides crustaux'

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Published: 18 May 2024

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1

Alikouss, Saïda. "Contribution a l'étude des fluides crustaux : approche expérimentale et analytique." Vandoeuvre-les-Nancy, INPL, 1993. http://www.theses.fr/1993INPL055N.

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Le développement des techniques d'analyse des inclusions fluides nécessite une calibration précise des installations micro-thermométriques. Une collection d'inclusions fluides synthétiques a été réalisée à partir de systèmes simples (h2o, h2o-co2) et de divers systèmes binaires bien connus (h2o-nacl, h2o-licl, h2o-kcl). Une étude d'inclusions fluides naturelles a été menée afin de caractériser la nature des paléofluides et leur éventuelle contribution à minéralisation en sn-w dans deux sites du limousin: 1) les indices du nord du granite de Saint-Goussaud: des fluides aqueux a h2o-nacl sans au
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2

Dubois, Michel. "Fluides crustaux : approche expérimentale et analytique : 1) détermination du solvus des systèmes H2O-MCL (M=Li, K, Rb, Cs) et 2) caractérisation et dynamique des fluides des dômes thermiques, sur l'exemple du Diapir Vellave (S-E Massif Central Francais)." Vandoeuvre-les-Nancy, INPL, 1992. http://docnum.univ-lorraine.fr/public/INPL_T_1992_DUBOIS_M.pdf.

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L’étude expérimentale réalisée sur les domaines d'immiscibilité liquide-vapeur des systèmes binaires eau-chlorure alcalin à 500 et 600°C montre une corrélation entre le rayon ionique du cation et la largeur du solvus tandis que la pression critique diminue. Cette étude a nécessité la reconstruction des diagrammes de phase des systèmes H2O-CsCl et H2O-RbCl par une méthode des moindres carrés modifiée. Une étude d'inclusions fluides a été menée sur les différents faciès lithologiques du dôme du Velay (Massif Central Francais). Dans les vaugnerites et les pegmatites associes ont été observés des
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3

Eglinger, Aurélien. "Cycle de l'uranium et évolution tectono-métamorphique de la ceinture orogénique Pan-Africaine du Lufilien (Zambie)." Thesis, Université de Lorraine, 2013. http://www.theses.fr/2013LORR0306/document.

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L'uranium, élément lithophile et incompatible, peut être utilisé en traceur géochimique pour discuter des différents modèles de formation et d'évolution de la croûte continentale. Ce travail de thèse, ciblé sur la ceinture Pan-Africaine du Lufilien en Zambie, caractérise le cycle de l'U et les minéralisations d'U pour ce segment de croûte continentale. Les séries silicoclastiques/évaporitiques de la ceinture du Lufilien, encaissant les minéralisations d'U, se sont déposées en contexte de rift (bassin du Roan) lors de la dislocation du supercontinent Rodinia au Néoprotérozoïque inférieur. Les â
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4

Ballentine, Christopher John. "He, Ne, and Ar isotopes as tracers in crustal fluids." Thesis, University of Cambridge, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387053.

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5

Barker, Shaun, and sbarker@eos ubc ca. "Dynamics of fluid flow and fluid chemistry during crustal shortening." The Australian National University. Research School of Earth Sciences, 2007. http://thesis.anu.edu.au./public/adt-ANU20090711.074630.

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In this thesis, an integrated structural and chemical approach has been used to investigate the spatial and temporal evolution of fluid chemistry, and fluid flow pathways, during crustal shortening. The Taemas Vein Swarm is hosted in a limestone-shale sequence, the Murrumbidgee Group, in the Eastern Belt of the Lachlan Orogen, in New South Wales, Australia. The Taemas Vein Swarm (TVS) is composed of calcite ± quartz veins, hosted in a series of faults and fractures, which extends over an area of approximately 20 km2. The Murrumbidgee Group is composed of several formations, comprising massive
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6

Wilkinson, Jamie John. "The origin and evolution of Hercynian crustal fluids, South Cornwall, England." Thesis, University of Southampton, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.252719.

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7

Siebenaller, Luc Vanderhaeghe Olivier. "Circulations fluides au cours de l'effondrement d'un prisme d'accrétion crustal l'exemple du "Metamorphic Core Complex" de l'île de Naxos (Cyclades, Grèce) /." S. l. : Nancy 1, 2008. http://www.scd.uhp-nancy.fr/docnum/SCD_T_2008_0139_SIEBENALLER.pdf.

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8

Siebenaller, Luc. "Circulations fluides au cours de l'effondrement d'un prisme d'accrétion crustal : l'exemple du "Metamorphic Core Complex" de l'île de Naxos (Cyclades, Grèce)." Thesis, Nancy 1, 2008. http://www.theses.fr/2008NAN10139/document.

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Cette thèse a pour objectif de caractériser les circulations de fluides en contexte d’effondrement d’un prisme d’accrétion crustal. Le Metamorphic Core Complex (MCC) de Naxos comprend un système de détachement/décollement caractérisé par mylonites, ultramylonites, cataclasites et failles normales dont les relations géométriques témoignent du litage rhéologique de la croûte continentale. La chimie des inclusions fluides déterminée par l’analyse microthermométrique, la spectroscopie RAMAN, l’ablation laser couplée à l’analyse spectroscopique (LA-ICP-MS), le « crush-leach », et les signatures iso
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9

Blythe, Lara S. "Understanding Crustal Volatiles : Provenance, Processes and Implications." Doctoral thesis, Uppsala universitet, Berggrundsgeologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-171486.

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Knowledge of the provenance of crustal volatiles and the processes by which they are released is extremely important for the dynamics of magmatic systems. Presented here are the results of multiple investigations, which aim to understand magmatic volatile contamination from contrasting but complementary perspectives. The main methodologies used include He and C isotope values and CO2/3He ratios of volcanic gases and fluids; simulation of magma-carbonate interaction using high-pressure high-temperature experimental petrology; X-ray microtomography of vesiculated xenoliths and computer modeling.
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10

Warwick, Alison Julie. "Mineral growth and fluid migration in mid-crustal shear zones." Thesis, University of Plymouth, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.340287.

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11

Hopkinson, Laurence. "The role of aqueous fluids in crustal processes at the inter and intra-crystalline level." Thesis, University of Southampton, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296147.

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12

Tourneur, Enora. "Circulation de fluides aux abords de failles d’échelle crustale : contraintes structurales, microtectoniques, inclusions fluides et géochimiques sur les processus de formation du gisement de Bou Azzer (Ni-Co), Anti-Atlas, Maroc." Thesis, Montpellier, 2019. http://www.theses.fr/2019MONTG064.

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Le district de cobalt-nickel de Bou Azzer est un gisement unique au monde mis en place dans un environnement de serpentinite carbonatée. Deux types de minéralisations sont exploités : des minéralisations massives et un système de veines. Les minéralisations massives sont des corps métalliques, sous forme de lentilles, orientées N120°E et essentiellement enrichies en arséniures de nickel et de cobalt. Elles sont localisées au contact entre une serpentinite, une diorite quartzique ou des roches volcaniques précambriennes. Leur mise en place se fait dans des conditions de moyennes températures (à
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13

Ay, Erkan. "Origin of crustal reflectivity and influence of fluids and fractures on velocity at the Kola superdeep borehole." Laramie, Wyo. : University of Wyoming, 2007. http://proquest.umi.com/pqdweb?did=1453231711&sid=4&Fmt=2&clientId=18949&RQT=309&VName=PQD.

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14

Ricci, Andrea <1989&gt. "Geochemistry of C-bearing gas compounds in natural fluids under crustal conditions: insights into deep and shallow processes." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amsdottorato.unibo.it/9007/1/ricci_andrea_tesi.pdf.

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The PhD research project was aimed to improve the scientific knowledge of the origin and fate of C-bearing gas compounds released from active volcanoes, hydrothermal systems and tectonically active sedimentary basins. The first goal was to investigate the primary source(s) of CH4 and light hydrocarbons in volcanic-hydrothermal gases under crustal conditions. This objective was achieved by comparing the composition of low molecular weight organic fraction (C1-C4) and associated CO2 and H2O in fumarolic gases and geothermal wells from different study areas around the world. We demonstrated that
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15

Porritt, R. W., and S. Yoshioka. "Evidence of Dynamic Crustal Deformation in Tohoku, Japan, From Time-Varying Receiver Functions." AMER GEOPHYSICAL UNION, 2017. http://hdl.handle.net/10150/626288.

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Temporal variation of crustal structure is key to our understanding of Earth processes on human timescales. Often, we expect that the most significant structural variations are caused by strong ground shaking associated with large earthquakes, and recent studies seem to confirm this. Here we test the possibility of using P receiver functions (PRF) to isolate structural variations over time. Synthetic receiver function tests indicate that structural variation could produce PRF changes on the same order of magnitude as random noise or contamination by local earthquakes. Nonetheless, we find sign
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16

Fichtel, Katja [Verfasser], Heribert [Akademischer Betreuer] Cypionka, and Ralf [Akademischer Betreuer] Rabus. "Influence of crustal fluids on growth and activity of marine deep biosphere microbial populations / Katja Fichtel. Betreuer: Heribert Cypionka ; Ralf Rabus." Oldenburg : BIS der Universität Oldenburg, 2014. http://d-nb.info/1066873305/34.

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17

Nüchter, Jens Alexander. "The structural record of mid crustal stress and pore fluid pressure changes related to the earthquake cycle." [S.l.] : [s.n.], 2007. http://deposit.ddb.de/cgi-bin/dokserv?idn=983666849.

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18

Diop, Catherine Bineta. "Structures et circulations de fluides dans un avant-pays synschisteux : le système de chevauchements des Mauritanides du Sénégal." Vandoeuvre-les-Nancy, INPL, 1996. http://www.theses.fr/1996INPL044N.

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Les Mauritanides du Sénégal (Afrique de l'ouest) sont constituées par des nappes épizonales mises en place au varisque. Ces nappes sont constituées de séries du précambrien supérieur au silurien, répétées dans des duplex caractéristiques des systèmes de chevauchements en rampes et paliers. Les chevauchements sont associés à une schistosité majeure S2 orientée N030°E, 15°NW portant une linéation d'étirement régionalement orientée N130°E. Des critères cinématiques suivant cette linéation indiquent que la mise en place des nappes s'est faite du NW vers le SE. La propagation des nappes vers le SE
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19

Hutnak, Michael. "Heat and fluid flux at a crustal scale : observations and models of coupled transport in young oceanic lithosphere /." Diss., Digital Dissertations Database. Restricted to UC campuses, 2007. http://uclibs.org/PID/11984.

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20

Wijns, Christopher P. "Exploring conceptual geodynamic models : numerical method and application to tectonics and fluid flow." University of Western Australia. School of Earth and Geographical Sciences, 2005. http://theses.library.uwa.edu.au/adt-WU2005.0068.

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Geodynamic modelling, via computer simulations, offers an easily controllable method for investigating the behaviour of an Earth system and providing feedback to conceptual models of geological evolution. However, most available computer codes have been developed for engineering or hydrological applications, where strains are small and post-failure deformation is not studied. Such codes cannot simultaneously model large deformation and porous fluid flow. To remedy this situation in the face of tectonic modelling, a numerical approach was developed to incorporate porous fluid flow into an exist
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21

Moore, Myles Thomas. "Noble Gas and Hydrocarbon Geochemistry of Coalbed Methane Fields from the Illinois Basin." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1462561493.

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22

Salazar, Reinoso Pablo [Verfasser]. "The upper crustal microseismicity image from the North Chilean subduction zone : implications for tectonics and fluid migration / Pablo Salazar Reinoso." Berlin : Freie Universität Berlin, 2011. http://d-nb.info/1025511484/34.

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23

Blereau, Eleanore Renee. "A Petrochronological Investigation of Metamorphic, Melt and Fluid Related Processes in Lower Crustal Rocks from Southwestern Norway and Southern India." Thesis, Curtin, 2017. http://hdl.handle.net/20.500.11937/59704.

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A petrochronological approach permitted quantitative constraints on the duration, conditions and spatio-temporal controls on metamorphism within complex high-grade metamorphic terranes. The effects of prolonged high temperatures on commonly used geochronometers, zircon and monazite, contrasts between terranes. The availability of these minerals and information recorded in lower crustal rocks is highly controlled by lower crustal processes, but the involvement of particular processes is resolvable through the integration of many analytical techniques into a coherent multidisciplinary interpreta
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24

Hood, Shawn Bruce. "Mid-crustal Cu-Au mineralisation during episodic pluton emplacement, hydrothermal fluid flow, and ductile deformation at the Minto deposit, YT, Canada." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/42818.

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The genesis of the Minto copper-gold deposit, YT, Canada, has been variously interpreted since its discovery although no existing model accounts for ductile deformation as a control on mineralization. Results from this study show that Minto ore is hosted within ductiley deformed granitoid host rocks emplaced as multiple intrusions into an actively deforming environment, with the variably sheared host rocks separated by incipiently deformed granodiorites essentially barren of mineralisation. Contacts between deformed/mineralized rock and incipiently deformed/barren rock range from abrupt to gra
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25

Maggi, Matteo <1981&gt. "The role of the fluid phase in the chemico-mechanical evolution of a mid-crustal shear zone: an example from Alpine Corsica." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2011. http://amsdottorato.unibo.it/3773/1/The_role_of_the_fluid_phase_in_the_chemico-mechanical_evolution.pdf.

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26

Maggi, Matteo <1981&gt. "The role of the fluid phase in the chemico-mechanical evolution of a mid-crustal shear zone: an example from Alpine Corsica." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2011. http://amsdottorato.unibo.it/3773/.

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27

Abily, Bénédicte. "Caractéristiques pétrographique, géochimique et structurale de la section crustale profonde de l'ophiolite d'Oman : Implications pour la genèse des magmas et le fonctionnement des chambres magmatiques à l'aplomb d'un centre d'expansion océanique." Phd thesis, Université Paul Sabatier - Toulouse III, 2011. http://tel.archives-ouvertes.fr/tel-00627553.

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Ce travail repose sur (1) une étude de terrain des cumulats lités de l'ophiolite d'Oman, notamment dans plusieurs massifs où cette unité restait largement inexplorée, (2) une étude pétrographique et géochimique (microsonde électronique et LA-ICP-MS) d'environ 700 échantillons et (3) une simulation en laboratoire de la cristallisation de magmas boninitiques en présence d'eau. La cinquantaine de faciès pétrographiques définie, gabbroïques et ultrabasiques, est indispensable pour décrire rigoureusement la croûte profonde omanaise. Cette variété lithologique est révélatrice de la très grande varia
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28

Barker, Shaun. "Dynamics of fluid flow and fluid chemistry during crustal shortening." Phd thesis, 2007. http://hdl.handle.net/1885/49303.

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In this thesis, an integrated structural and chemical approach has been used to investigate the spatial and temporal evolution of fluid chemistry, and fluid flow pathways, during crustal shortening. The Taemas Vein Swarm is hosted in a limestone-shale sequence, the Murrumbidgee Group, in the Eastern Belt of the Lachlan Orogen, in New South Wales, Australia. The Taemas Vein Swarm (TVS) is composed of calcite ± quartz veins, hosted in a series of faults and fractures, which extends over an area of approximately 20 km2. The Murrumbidgee Group is composed of several formations, comprising massive
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29

Kay, B. V. "Testing the uncover paradigm: crustal fluid pathways in the Curnamona Province." Thesis, 2017. http://hdl.handle.net/2440/128253.

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This item is only available electronically.<br>In July 2017, scale-reduction was undertaken to improve the bandwidth and resolution of the AusLAMP defined Curnamona Conductor (Robertson et al., 2016) by way of a broadband magnetotelluric profile with site spacing of 2 km, extending from the Erudina Domain across the Mudguard and Quinyambie Domains in the Curnamona Province. A fossil fluid pathway has been identified from the lower mid crustal conductor to the near surface situated near a topographic basement high. The upper crustal conductor has been further delineated beneath the Quinyambie
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30

Soeffky, P. "Delineating the deep crustal fluid link between the Paralana Enhanced Geothermal System and the Beverley Uranium Mine using magnetotellurics." Thesis, 2012. http://hdl.handle.net/2440/95486.

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This item is only available electronically.<br>The global demand for clean energy alternatives is constantly increasing, creating significant interest for more sustainable energy resources such as uranium and geothermal. Australia is host to over 25% of the world's known uranium resources as well as having significant geothermal potential. The Mount Painter Domain, in the Northern Flinders Ranges in South Australia, is in a region of anomalously high heat flow generated by radiogenic decay of uranium and thorium rich granites. Two distinct uranium deposits have formed from dissolved ur
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31

Nüchter, Jens Alexander [Verfasser]. "The structural record of mid crustal stress and pore fluid pressure changes related to the earthquake cycle / Jens Alexander Nüchter." 2007. http://d-nb.info/983666849/34.

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32

Pastori, Marina. "crustal fracturing field and presence of fluid as revealed by seismic anisotropy: case-histories from seismogenic areas in the Apennines." Thesis, 2011. http://hdl.handle.net/2122/7970.

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During the last decades, the study of seismic anisotropy has provided useful information for the interpretation and evaluation of the stress field and active crustal deformation. Seismic anisotropy can yield valuable information on upper crustal structure, fracture field, and presence of fluid-saturated rocks crossed by shear waves. Several studies worldwide demonstrate that seismic anisotropy is related to stress-aligned, filled-fluid micro-cracks (EDA model, Crampin et al., 1984b; Crampin, 1993). The seismic anisotropy is an almost ubiquitous property of the Earth and the Shear Wave Splitti
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33

Jorge, Raul Carlos Godinho dos Santos 1964. "Caracterização petrográfica, geoquímica e isotópica dos reservatórios metalíferos crustais, dos processos de extração de metais e dos fluidos hidrotermais envolvidos em sistemas mineralizantes híbridos na Faixa Piritosa Ibérica." Doctoral thesis, 2009. http://catalogo.ul.pt/F/?func=item-global&doc_library=ULB01&type=03&doc_number=000571126.

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Tese de doutoramento, Geologia (Metalogenia), 2010, Universidade de Lisboa, Faculdade de Ciências<br>Fundação para a Ciência e Tecnologia. Projectos "ARCHYMEDES" (POCTI/CTA/41393/2001; IR: Fernando J.A.S. Barriga) e "ARCHYMEDES II" (POCTI/CTA/458073/2002; IR: Jorge M.R.S. Relvas); Society of Economic Geologists - BHP Student Research Grant
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34

Robin, Catherine M. I. "Diapirism on Venus and the Early Earth and The thermal effect of fluid flows in AECL's Tunnel Sealing Experiment." Thesis, 2010. http://hdl.handle.net/1807/24863.

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Flow instabilities occur at all scales in planetary systems. In this thesis we examine three cases of such instabilities, on three very different length scales. In the first part, we test the idea that Archean granite-greenstone belts (GGBs) form by crustal diapirism, or Rayleigh-Taylor instabilities. GGBs are characterized by large granitic domes (50-100 km in diameter) embedded in narrow keel-shaped greenstones. They are ubiquitous in Archean (> 2.5 Ga) terrains, but rare thereafter. We performed finite element calculations for a visco-elastic, temperature-dependent, non-Newtonian crust unde
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35

Hensch, Martin [Verfasser]. "On the interrelation of fluid induced seismicity and crustal deformation at the Columbo submarine volcano (Aegean Sea, Greece) / vorgelegt von Martin Hensch." 2009. http://d-nb.info/1000297624/34.

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36

PAPESCHI, SAMUELE. "The brittle/ductile transition at upper crustal level: geometry, strain partitioning and fluid circulation. The case study of the Calamita Unit (Elba Island, Northern Apennines, Italy)." Doctoral thesis, 2019. http://hdl.handle.net/2158/1156134.

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This study focuses on the detailed investigation of the brittle/plastic transition in quartz-feldspathic rocks at upper-middle crustal conditions and aims to better understand the role of fluids and temperature during deformation. The Calamita Unit (Elba Island, Italy) is a high metamorphic grade unit (T ~ 650 °C) that has been intruded by a monzogranite body at shallow crustal level (P < 0.2 GPa) and coevally deformed during regional shortening for a limited time span (< 1 Ma). These conditions outline the Calamita Unit as an ideal case study to investigate the brittle/plastic transition at a
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37

Eckert, Andreas [Verfasser]. "3D multi-scale finite element analysis of the crustal state of stress in the Western US and the Eastern California Shear Zone, and implications for stress - fluid flow interactions for the Coso geothermal field / von Andreas Eckert." 2007. http://d-nb.info/986722170/34.

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