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Статті в журналах з теми "Interaction fluides-Roche":
Laycock, Dallin P., Rick D. Schroeder, and Reza Safari. "Breaking boulders: experimental examination of hydraulic fracturing in the Montney Formation." Bulletin of Canadian Energy Geoscience 71, no. 1 (March 1, 2024): 41–62. http://dx.doi.org/10.35767/gscpgbull.71.1.41.
Дисертації з теми "Interaction fluides-Roche":
Lespinasse, Marc. "Les traînées d'inclusions fluides : marqueur microstructural des paléocontraintes et des migrations fluides /." [Vandoeuvre-lès-Nancy] : Centre de recherches sur la géologie des matières premières minérales et énergétiques, 1991. http://catalogue.bnf.fr/ark:/12148/cb35465573s.
Bras, Erwan. "Couplages entre métamorphisme, fluides et déformation : étude de cas de l’éclogitisation dans les Arcs de Bergen." Electronic Thesis or Diss., Université de Rennes (2023-....), 2023. http://www.theses.fr/2023URENB069.
Eclogitisation is an emblematic process of continental subduction zones. It involves transformation of the mineralogical assemblage, changes in rheology and permeability, fluid-rock interactions, and deformation that is either viscous or brittle, with the potential to cause earthquakes. The study of the coupling between metamorphic reactions, deformation and fluids is therefore crucial to understand the nature and rheology of the lower continental crust when it reaches high-pressure conditions. The aim of this thesis is to study this coupling, focusing on a specific field case: the eclogitisation of granulite on Holsnøy Island, a now-exhumed part of the ancient lower crust of the Caledonian mountain range, in the Bergen Arcs in western Norway. Observation of field relations shows that deformation and fluid circulation are the forces that drive eclogitisation of the lower crust. However, the temporal evolution and pressure conditions of eclogitic zones are still enigmatic. During this thesis, I therefore set out to understand how feedbacks between metamorphic transformation, fluid transport and deformation can explain the spatio-temporal evolution of the Holsnøy eclogite zones. This thesis is structured into three main chapters that correspond to two previously published scientific articles, and a third in preparation. As a first step, I carried out a detailed petrological study of an eclogite shear zone at Holsnøy, in order to determine the mineralogical and textural changes during the successive metamorphic reactions that transform granulite into eclogite. These observations reveal that the first reactions weaken the granulite, and the last ones partially restore the strength of the rock. I developed a numerical model that illustrates that this transient weakening mechanism, associated with fluid circulation, contributes to the widening of the shear zones over time. Secondly, I developed a numerical model to study how episodic high pressure pulses can propagate eclogitisation into the granulite, even if it is impermeable. I show that there is a positive feedback between fluid circulation and eclogitisation: a fluid influx causes eclogitisation, which increases the rock density, generating porosity and thus promoting fluid flow. A hydroreactive front can propagate rapidly into the impermeable granulite and cause its eclogitisation. Therefore, fluid-reaction coupling is a plausible process for the evolution of Holsnøy eclogite zones. In order to bring together the results of the first two articles, I finally extended the previous model to include deformation and the rheological effects of eclogitisation. This study shows that deformation in a rheologically heterogeneous medium can generate local pressure variations of several kbar, which can explain the juxtaposition of rocks with different metamorphic facies at the same crustal level. Fluid circulation, however, may affect these pressure variations
Maes, Pauline. "Circulations de fluides et interactions eau/roche passées et actuelles dans la pile sédimentaire du site de Meuse/Haute-Marne : apport des isotopes du Sr et conséquences." Montpellier 2, 2002. http://www.theses.fr/2002MON20174.
Coquinot, Yvan. "Physicochimie et origine de la phase fluide impliquée dans les processus d'interactions fluide-roche au cours du métamorphisme rétrograde et de la déformation : exemple des diabases métamorphisées du massif de Rocroi." Lille 1, 2005. https://pepite-depot.univ-lille.fr/RESTREINT/Th_Num/2005/50376-2005-77.pdf.
Coltat, Rémi. "Interactions fluides-roches-déformation durant l’exhumation mantellique dans les marges hyper-étendues, la nappe de Platta, Alpes suisses." Thesis, Rennes 1, 2020. http://www.theses.fr/2020REN1B020.
Fluid-rock interactions are widespread processes on earth including divergent settings from hyper-extended margins to oceanic ridges. There, mantle rocks are exhumedto the seafloor thanks to detachment faults. In the same time, the inception of mafic magmatism occurs during asthenosphere partial melting. Coupling between activemagmatic and tectonic processes triggers hydrothermal circulation in exhuming mantle rocks. This leads to several alterations like: i) the serpentinization of mantle rocks, ii) theformation of Cu-Zn-Fe-Co-Au-Ag-rich hydrothermal mineralized systems and iii) the carbonation of mantle rocks. Mineralization represents critical resources for our technological and societal needs. Hence, studies dealing with ore-forming processes applied to oceanic hydrothermal systems are essential to unravel where and how mineralization forms. However, in present-day oceanic domains, the study of these systems is limited by the bad observation conditions at the seafloor. Hence, one way tofully understand these systems is to turn on fossil analogs preserved on-land. We adopted this strategy here and focused on a Tethyan ophiolite preserved in the Platta nappe where subsequent Alpine metamorphism and deformation had minor effect on oceanic geometries. Sulfide mineralization somewhat similar to this formed in oceanic settings occurred where the magmatic buget was high enough to trigger hydrothermal circulation. The mineralization displays peculiarities (presence of Fe-Ca-silicates, association with mafic intrusions) indicating it corresponds to the root zone of present-day mineralized systems.Geochemical signatures of the mineralization (Co/Ni ratio decrease, Se contentincrease) suggests it formed from hydrothermal fluid mixing with seawater. Subsequently, mantle rocks and basalts recorded a carbonation event under hydrothermal temperatures at about 90-130°C. Syn-tectonic carbonation was the result of serpentinized-derived fluids mixing with seawater at the serpentinite-basalt interface. These alterations reported in mantle rocks from the Platta nappe are the legacy of the diversity of fluid-rock interactions in hyper-extended margins
Almeida, de Carvalho Ancilla Maria. "Evolution of the Early Cretaceous, South-Atlantic pre-salt lacustrine systems : Insights from Stratigraphic Forward and Geochemical Modeling." Electronic Thesis or Diss., Sorbonne université, 2023. http://www.theses.fr/2023SORUS590.
The lacustrine carbonate rocks of the Barra Velha Formation (BVF), Santos Basin, present distinct composition and texture, with superimposed sedimentary and diagenetic heterogeneities, forming complex reservoirs. To better understand and predict lateral and vertical heterogeneities of the carbonate reservoirs of Santos Basin, we conduct a multidisciplinary approach, integrating sedimentological-diagenetic analyses, stratigraphic forward (process-based) modeling, and geochemical modeling. From a multiscale dataset of a field localized in the Outer High of the Santos Basin, we (1) characterized the spatial and stratigraphic distribution of the different facies and diagenetic phases and their main controlling factors, (2) evaluated the conceptual model proposed and provide the initial conditions for fluid-rock interaction model, using stratigraphic forward modeling (SFM) (3) investigated the ideal physicochemical conditions and basin fluid circulation patterns ruling the diagenetic alterations observed in the study area. The data analysis performed in this study highlights the spatial and temporal distribution of different types of Mg-clay, the main diagenetic products, and their association with different facies. The stratigraphic variations in Mg-clay distribution indicate an influence of the lake water chemistry. Furthermore, the Mg-clay alteration pattern and its diagenetic features suggest a strong control of the structural setting. The spatial and stratigraphic distribution of sedimentological and diagenetic heterogeneities indicate that the lake water’s first-order hydrochemical evolution drove the major depositional and diagenetic aspects, modulated by local factors, which enhanced the diagenetic imprint. Three main characteristics mark the lake water hydrochemical variation: an initial stage associated with a higher input of detrital content, an intermediary phase marked by higher evaporative conditions, and a final stage characterized by fluctuations of the evaporative conditions with a lower detrital contribution. In the second part of the study, we propose a stratigraphic forward model based on the depositional conceptual model and the evaluation of large-scale constraints, like subsidence and lake-level variations. The model also addresses the lake-level variations relying on the hydrologic water balance between precipitation and evaporation rate and provides insights into the evolution of hydrological zones. Through the process-based model, we propose a lateral and vertical grid of facies used to parametrize the reactive transport modeling. In the third part of the study, a series of geochemical calculations were used to estimate the diagenetic potential of different solute sources and the main paleoenvironmental controls on diagenetic modifications. The calculations show that the pH fluctuation is the main factor impacting the Mg-clay preservation, followed by the diagenetic fluids' Mg/Ca and Mg/Si ratios, and emphasize the role of pCO2 in the diagenetic alteration. In addition, the models point out the ability of different Mg-clay types to generate distinctive amounts of diagenetic products. Finally, we explore diagenetic scenarios on the BVF sag phase through reactive transport modeling, focusing on the dolomitization, silicification, and dissolution processes and addressing the impact of regional versus local fluid circulation on diagenetic alteration. The initial facies heterogeneities, intrinsically related to the depositional characteristics, have a crucial role in the evolution of the diagenetic process. The results also highlight the preferential pathways of fluid circulation and diagenetic alteration associated with Mg-clay-rich layers and facies with higher permeability alternation. The multidisciplinary approach provides a spatial view of the interplay between rock properties and possible fluid circulation patterns in the basin
Michel, Olivier. "Caractérisation isotopique Rb/Sr et Pb/Pb des roches totales, des minéraux de remplissage de fracture et des eaux des formations sédimentaires jurassiques de Tournemire (Aveyron, France) : implications sur les interactions eau/roche passées et actuelles." Montpellier 2, 1999. http://www.theses.fr/1999MON20126.
Moisy, Michel. "Evolution de la perméabilité et de la circulation des fluides hydrothermaux dans une zone de cisaillement fragile /." Orléans : Ed. du BRGM, 1993. http://catalogue.bnf.fr/ark:/12148/cb356065587.
Etxegarai, Aldami Etxebarria Maddi. "Etude du couplage hydromécanique dans les roches par analyse d'images obtenues par tomographie neutronique." Thesis, Université Grenoble Alpes (ComUE), 2019. http://www.theses.fr/2019GREAI010/document.
The behaviour of subsurface-reservoir porous rocks is a central topic in resource engineering industry and has relevant applications for hydrocarbon and water production or CO2 sequestration. One of the key open issues is the effect of deformations on the hydraulic properties of the host rock, specifically in saturated environments. Deformation in geomaterials is rarely homogeneous because of the complex boundary conditions they undergo as well as for their intrinsic tendency to localise. This non uniformity of the deformation yields a non uniform permeability field, meaning that the traditional macroscopic analysis methods are outside their domain of validity. These methods are in fact based on measurements taken at the boundaries of a tested sample, under the assumption of internal homogeneity. At this stage, our understanding is in need of direct measurements of the local fluid permeability and its relationship with localiseddeformation.This doctoral dissertation focuses on the acquisition of such local data about the hydro mechanical properties of porous geomaterials in full-field, adopting neutron and x-ray tomography, as well as on the development of novel analysis methods. While x-ray imaging has been increasingly used in geo-sciences in the last few decades, the direct detection of fluid has been very limited because of the low air/water contrast within geomaterials. Unlike x-rays, neutrons are very sensitive to the hydrogen in the water because of their interaction with matter (neutrons interact with the atoms’ nuclei rather than with the external electron shell as x-rays do). This greater sensitivity to hydrogen provides a high contrast compared to the rock matrix, in neutron tomography images that facilitates the detection of hydrogen-rich fluids. Furthermore, neutrons are isotope-sensitive, meaning that water (H 2 0) and heavy water (D20), while chemically and hydraulically almost identical, can be easily distinguished in neutron imaging.The use of neutron imaging to investigate the hydromechanical properties of rocks is a substantially under-explored experimental area, mostly limited to 2D studies of dry, intact or pre-deformed samples, with little control of the boundary conditions. In thiswork we developed a new servocontrolled triaxial cell to perform multi-fluid flow experiments in saturated porous media, while performing in-situ loading and acquiring 4-dimensional neutron data.Another peculiarity of the project is the use of high-performance neutron imaging facilities (CONRAD-2, in Helmholtz Zentrum Berlin, and NeXT-Grenoble, in Institut Laue-Langevin), taking advantage of the world’s highest flux and cutting edge technology to acquire data at an optimal frequency for the study of this processes. The results of multiple experimental campaigns covering a series of initial and boundary conditions of increasing complexity are presented in this work.To quantify the local hydro-mechanical coupling, we applied a number of standard postprocessing procedures (reconstruction, denoising, Digital Volume Correlation) but also developed an array of bespoke methods, for example to track the water front andcalculate the 3D speed maps.The experimental campaigns performed show that the speed of the water front driven by imbibition in a dry sample is increased within a compactant shear band, while the pressure driven flow speed is decreased in saturated samples, regardless of the volumetric response of the shear band (compactant/dilatant). The 3D nature of the data and analyses has revealed essential in the characterization of the complex mechanical behaviour of the samples and the resultant flow speed.The experimental results obtained contribute to the understanding of flow in porous materials, ensure the suitability of the analysis and set an experimental method for further in-situ hydromechanical campaigns
Moisy, Michel. "Evolution de la perméabilité et de la circulation des fluides hydrothermaux dans une zone de cisaillement fragile." Phd thesis, Grenoble 1, 1993. http://tel.archives-ouvertes.fr/tel-00529983.
Книги з теми "Interaction fluides-Roche":
Shawn, R. P. Understanding the Micro to Macro Behaviour of Rock - Fluid Systems. Geological Society of London, 2005.