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Journal articles on the topic 'Opalinus clay'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Mitzscherling, Julia, and Dirk Wagner. "Bedeutung von Mikroorganismen für die Endlagerung radioaktiver Abfälle." BIOspektrum 30, no. 5 (2024): 520–23. http://dx.doi.org/10.1007/s12268-024-2253-3.

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AbstractDeep geological repositories are the international consensus solution for safely isolating high-level nuclear waste from the biosphere. In Germany, among others Opalinus Clay is under consideration to serve as stable host rock environment. Although physical and chemical characteristics of clays suppress microbial growth, Opalinus Clay harbors diverse microbial communities that can be relevant for the safety of a repository.

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2

Kaufhold, Annette, Matthias Halisch, Gerhard Zacher, and Stephan Kaufhold. "X-ray computed tomography investigation of structures in Opalinus Clay from large-scale to small-scale after mechanical testing." Solid Earth 7, no. 4 (2016): 1171–83. http://dx.doi.org/10.5194/se-7-1171-2016.

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Abstract. In the past years X-ray computed tomography (CT) has became more and more common for geoscientific applications and is used from the µm-scale (e.g. for investigations of microfossils or pore-scale structures) up to the dm-scale (full drill cores or soil columns). In this paper we present results from CT imaging and mineralogical investigations of an Opalinus Clay core on different scales and different regions of interest, emphasizing especially the 3-D evaluation and distribution of cracks and their impact on mechanical testing of such material. Enhanced knowledge of the testing beha

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3

Bleyen, Nele, Joe S. Small, Kristel Mijnendonckx, et al. "Ex and In Situ Reactivity and Sorption of Selenium in Opalinus Clay in the Presence of a Selenium Reducing Microbial Community." Minerals 11, no. 7 (2021): 757. http://dx.doi.org/10.3390/min11070757.

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79Se is a critical radionuclide concerning the safety of deep geological disposal of certain radioactive wastes in clay-rich formations. To study the fate of selenium oxyanions in clayey rocks in the presence of a selenium reducing microbial community, in situ tests were performed in the Opalinus Clay at the Mont Terri Rock Laboratory (Switzerland). Furthermore, biotic and abiotic batch tests were performed to assess Se(VI) and Se(IV) reactivity in the presence of Opalinus Clay and/or stainless steel, in order to support the interpretation of the in situ tests. Geochemical modeling was applied

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4

Finck, N. "Iron speciation in Opalinus clay minerals." Applied Clay Science 193 (August 2020): 105679. http://dx.doi.org/10.1016/j.clay.2020.105679.

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5

Asim, Taimoor, and Haval Kukha Hawez. "Effects of CO2 Geosequestration on Opalinus Clay." Energies 17, no. 10 (2024): 2431. http://dx.doi.org/10.3390/en17102431.

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CO2 geosequestration is an important contributor to United Nations Sustainable Development Goal 13, i.e., Climate Action, which states a global Net-Zero CO2 emissions by 2050. A potential impact of CO2 geosequestration in depleted oil and gas reservoirs is the variations in induced pressure across the caprocks, which can lead to significant local variations in CO2 saturation. A detailed understanding of the relationship between the pressure gradient across the caprock and local CO2 concentration is of utmost importance for assessing the potential of CO2 geosequestration. Achieving this through

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6

Nguyen, T. S., and A. D. Le. "Development of a constitutive model for a bedded argillaceous rock from triaxial and true triaxial tests." Canadian Geotechnical Journal 52, no. 8 (2015): 1072–86. http://dx.doi.org/10.1139/cgj-2013-0323.

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In this work, a constitutive model that predicts the mechanical behaviour of Opalinus clay is developed. The model is based on the theory of plasticity, and takes into consideration the inherent anisotropy due to the existence of bedding planes, hardening behaviour before the peak strength, softening behaviour after the peak, and creep effects. The model was implemented into the equations of pseudostatic equilibrium to simulate the mechanical response of Opalinus clay during conventional triaxial tests (using cylindrical samples) and true triaxial tests (using cubic samples). The model satisfa

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7

Wild, Katrin M., Patric Walter, and Florian Amann. "The response of Opalinus Clay when exposed to cyclic relative humidity variations." Solid Earth 8, no. 2 (2017): 351–60. http://dx.doi.org/10.5194/se-8-351-2017.

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Abstract. Clay shale specimens were exposed to cyclic relative humidity (RH) variations to investigate the response of the material to natural environmental changes. Opalinus Clay, a clay shale chosen as host rock for nuclear waste disposal in Switzerland, was utilized. The specimens were exposed to stepwise relative humidity cycles in which they were alternately allowed to equilibrate at 66 and 93 % relative humidity. Principal strains were monitored throughout the experiments using strain gauges. After each relative humidity cycle, Brazilian tensile strength tests were performed to identify

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8

Schulze, Otto. "Strengthening and stress relaxation of Opalinus Clay." Physics and Chemistry of the Earth, Parts A/B/C 36, no. 17-18 (2011): 1891–97. http://dx.doi.org/10.1016/j.pce.2011.07.090.

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9

Boylan, Aislinn A., Carla Perez-Mon, Laurent Guillard, et al. "H2-fuelled microbial metabolism in Opalinus Clay." Applied Clay Science 174 (June 2019): 69–76. http://dx.doi.org/10.1016/j.clay.2019.03.020.

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10

Hunsche, Udo, Fritz Walter, and Hajo Schnier. "Evolution and failure of the Opalinus clay." Applied Clay Science 26, no. 1-4 (2004): 403–11. http://dx.doi.org/10.1016/j.clay.2003.12.033.

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11

Yang, Qing Chun. "A Numerical Simulation of Diffusion Experiment in Clay." Advanced Materials Research 322 (August 2011): 353–56. http://dx.doi.org/10.4028/www.scientific.net/amr.322.353.

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Safety assessment of nuclear waste disposal in a deep geological repository requires understanding and quantifying radionuclide transport through the hosting geological formation. Determining diffusion parameters under real conditions is necessary for the performance assessment of a deep geological repository where high level wastes are placed for safety disposal. The in situ diffusion and retention (DR) experiments are designed to study the transport and retention properties of the Opalinus clay formation. In this paper, a scoping numerical simulation is performed in Opalinus Clay, The simula

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12

Hennig, Theresa, and Michael Kühn. "Uranium migration through the Swiss Opalinus Clay varies on the metre scale in response to differences of the stability constant of the aqueous, ternary uranyl complex Ca<sub>2</sub>UO<sub>2</sub>(CO<sub>3</sub>)<sub>3</sub>." Advances in Geosciences 56 (November 9, 2021): 97–105. http://dx.doi.org/10.5194/adgeo-56-97-2021.

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Abstract. The simulation of uranium migration through the Swiss Opalinus Clay is used as an example to quantify the influence of varying values of a stability constant in the underlying thermodynamic database on the migration lengths for the repository scale. Values for the stability constant of the neutral, ternary uranyl complex Ca2UO2(CO3)3 differ in literature by up to one order of magnitude. Within the studied geochemical system, either the neutral or the anionic complex CaUO2(CO3)32- is the predominant one, depending on the chosen value for the neutral complex. This leads to a changed in

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13

Winhausen, Lisa, Jop Klaver, Joyce Schmatz, et al. "Micromechanisms leading to shear failure of Opalinus Clay in a triaxial test: a high-resolution BIB–SEM study." Solid Earth 12, no. 9 (2021): 2109–26. http://dx.doi.org/10.5194/se-12-2109-2021.

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Abstract. A microphysics-based understanding of mechanical and hydraulic processes in clay shales is required for developing advanced constitutive models, which can be extrapolated to long-term deformation. Although many geomechanical tests have been performed to characterise the bulk mechanical, hydro-mechanical, and failure behaviour of Opalinus Clay, important questions remain about micromechanisms: how do microstructural evolution and deformation mechanisms control the complex rheology? What is the in situ microstructural shear evolution, and can it be mimicked in the laboratory? In this c

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14

Xiong, Qingrong, and Andrey P. Jivkov. "Analysis of pore structure effects on diffusive transport in Opalinus clay via pore network models." Mineralogical Magazine 79, no. 6 (2015): 1369–77. http://dx.doi.org/10.1180/minmag.2015.079.6.12.

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AbstractOpalinus clay has a high sealing capacity and is therefore considered as a viable candidate for hosting high-level radioactive waste. Assessment of the long-term containment function of clays requires understanding and modelling of mass transport through evolving pore systems. Development of pore network models for diffusion, which can be coupled to models for deformation and micro-cracking, is reported. Effects of clay texture and solid phase constitution are calculated and analysed. The results are in the range of, but slightly over-predicting, experimentally measured coefficients of

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15

Hennig, Theresa, and Michael Kühn. "Surrogate Model for Multi-Component Diffusion of Uranium through Opalinus Clay on the Host Rock Scale." Applied Sciences 11, no. 2 (2021): 786. http://dx.doi.org/10.3390/app11020786.

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Multi-component (MC) diffusion simulations enable a process based and more precise approach to calculate transport and sorption compared to the commonly used single-component (SC) models following Fick’s law. The MC approach takes into account the interaction of chemical species in the porewater with the diffuse double layer (DDL) adhering clay mineral surfaces. We studied the shaly, sandy and carbonate-rich facies of the Opalinus Clay. High clay contents dominate diffusion and sorption of uranium. The MC simulations show shorter diffusion lengths than the SC models due to anion exclusion from

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16

Lozovyi, Serhii, and Andreas Bauer. "Static and dynamic stiffness measurements with Opalinus Clay." Geophysical Prospecting 67, no. 4 (2018): 997–1019. http://dx.doi.org/10.1111/1365-2478.12720.

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17

Wu, Tao, Samer Amayri, Jakob Drebert, Luc R. Van Loon, and Tobias Reich. "Neptunium(V) Sorption and Diffusion in Opalinus Clay." Environmental Science & Technology 43, no. 17 (2009): 6567–71. http://dx.doi.org/10.1021/es9008568.

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18

Crisci, Eleonora, Alessio Ferrari, Silvio B. Giger, and Lyesse Laloui. "Hydro-mechanical behaviour of shallow Opalinus Clay shale." Engineering Geology 251 (March 2019): 214–27. http://dx.doi.org/10.1016/j.enggeo.2019.01.016.

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19

Jobmann, M., Th Wilsnack, and H. D. Voigt. "Investigation of damage-induced permeability of Opalinus clay." International Journal of Rock Mechanics and Mining Sciences 47, no. 2 (2010): 279–85. http://dx.doi.org/10.1016/j.ijrmms.2009.11.009.

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20

Favero, Valentina, Alessio Ferrari, and Lyesse Laloui. "Thermo-mechanical volume change behaviour of Opalinus Clay." International Journal of Rock Mechanics and Mining Sciences 90 (December 2016): 15–25. http://dx.doi.org/10.1016/j.ijrmms.2016.09.013.

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21

Sauer, Kirsten, Florie Caporuscio, Marlena Rock, Michael Cheshire, and Carlos Jové-Colón. "HYDROTHERMAL INTERACTION OF WYOMING BENTONITE AND OPALINUS CLAY." Clays and Clay Minerals 68, no. 2 (2020): 144–60. http://dx.doi.org/10.1007/s42860-020-00068-8.

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22

Keller, L. M., and L. Holzer. "Image-Based Upscaling of Permeability in Opalinus Clay." Journal of Geophysical Research: Solid Earth 123, no. 1 (2018): 285–95. http://dx.doi.org/10.1002/2017jb014717.

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23

Joseph, C., K. Schmeide, S. Sachs, V. Brendler, G. Geipel, and G. Bernhard. "Sorption of uranium(VI) onto Opalinus Clay in the absence and presence of humic acid in Opalinus Clay pore water." Chemical Geology 284, no. 3-4 (2011): 240–50. http://dx.doi.org/10.1016/j.chemgeo.2011.03.001.

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24

Zhang, Xiang, Hang Yin, Wenjie Yu, Zhen Lei, and Juntong Qu. "Numerical Study of Gas Breakthrough in Preferential Rocks for Underground Nuclear Waste Repositories." Minerals 13, no. 3 (2023): 393. http://dx.doi.org/10.3390/min13030393.

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During the long-term storage of radioactive waste, the continuous generation of gas in the disposal area may influence the integrity of host rock. Thus, the investigation of gas migration and breakthrough in low-permeability rock is indispensable for the stability assessment. In this work, the pore space models of four potential host rocks (Boom clay, COx argillite, Opalinus clay, and Beishan granite) were generated via the binarization of the Gaussian random field. This method provides a randomly formed pore network that does rely on an initial definition of pore shape. The constructed models

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25

Jenni, A., U. Mäder, C. Lerouge, S. Gaboreau, and B. Schwyn. "In situ interaction between different concretes and Opalinus Clay." Physics and Chemistry of the Earth, Parts A/B/C 70-71 (2014): 71–83. http://dx.doi.org/10.1016/j.pce.2013.11.004.

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26

Keller, Lukas M., Philipp Schuetz, Rolf Erni, et al. "Characterization of multi-scale microstructural features in Opalinus Clay." Microporous and Mesoporous Materials 170 (April 2013): 83–94. http://dx.doi.org/10.1016/j.micromeso.2012.11.029.

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27

Salager, Simon, Bertrand François, Mathieu Nuth, and Lyesse Laloui. "Constitutive analysis of the mechanical anisotropy of Opalinus Clay." Acta Geotechnica 8, no. 2 (2012): 137–54. http://dx.doi.org/10.1007/s11440-012-0187-2.

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28

Keller, Lukas M. "Pore geometry effects on elastic properties of Opalinus Clay." GEOPHYSICS 81, no. 5 (2016): D543—D551. http://dx.doi.org/10.1190/geo2015-0452.1.

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Regarding the storage of nuclear waste within clay rock formations requires fundamental understanding of elastic properties of this rock type with regard to the risk evaluation process. The influence of the pore geometry on elastic properties of Opalinus Clay is studied on the basis of realistic pore microstructure, which is reconstructed from image data acquired by focused ion beam nanotomography. These microstructures are used as input pore geometries for linear elastic finite-element modeling to determine Thomsen’s [Formula: see text], [Formula: see text], and [Formula: see text] anisotropy

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29

Keller, Lukas M. "3D pore microstructures and computer simulation: Effective permeabilities and capillary pressure during drainage in Opalinus Clay." Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles 76 (2021): 44. http://dx.doi.org/10.2516/ogst/2021027.

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The 3D reconstruction of the pore space in Opalinus Clay is faced with the difficulty that high-resolution imaging methods reach their limits at the nanometer-sized pores in this material. Until now it has not been possible to image the whole pore space with pore sizes that span two orders of magnitude. Therefore, it has not been possible to predict the transport properties of this material with the help computer simulations that require 3D pore structures as input. Following the concept of self-similarity, a digital pore microstructure was constructed from a real but incomplete pore microstru

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30

Cajuhi, Tuanny, Gesa Ziefle, Jobst Maßmann, Thomas Nagel, and Keita Yoshioka. "Modeling Desiccation Cracks in Opalinus Clay at Field Scale with the Phase-Field Approach." InterPore Journal 1, no. 1 (2024): ipj260424–7. http://dx.doi.org/10.69631/ipj.v1i1nr8.

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Geological materials such as Opalinus Clay show complex coupled hydro-mechanical behavior at laboratory and field scales. In the context of radioactive waste disposal, in-situ excavations might remain open for ventilation and operation for decades and, consequently, be susceptible to environmental changes such as desaturation. The saturation changes can then lead to mechanical deformation and desiccation cracks. To account for desiccation cracking at field scale, this study proposes an unsaturated hydro-mechanical model combined with the phase-field approach. Using laboratory and in-situ exper

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31

Stavropoulou, E., and L. Laloui. "Sealing Response of Pre-Fissured Opalinus Clay to CO2 Injection." IOP Conference Series: Earth and Environmental Science 1480, no. 1 (2025): 012065. https://doi.org/10.1088/1755-1315/1480/1/012065.

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Abstract Fissures can have a significant impact on caprock integrity in the context of carbon capture and storage (CCS). In this campaign, the sealing capacity of a pre-fissured caprock material, the Opalinus Clay shale, is studied with real time x-ray imaging during CO2 injection. 3D image analysis of the acquired x-ray tomographies reveals that the pre-existing fissure drives the hydromechanical response of the material until a certain overpressure level after which, new breakthrough pathways are created though the matrix of the material.

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32

Beaver, Rachel C., Katja Engel, W. Jeffrey Binns, and Josh D. Neufeld. "Microbiology of barrier component analogues of a deep geological repository." Canadian Journal of Microbiology 68, no. 2 (2022): 73–90. http://dx.doi.org/10.1139/cjm-2021-0225.

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Canada is currently implementing a site selection process to identify a location for a deep geological repository (DGR) for the long-term storage of Canada’s used nuclear fuel, wherein used nuclear fuel bundles will be sealed inside copper-coated carbon steel containers, encased in highly compacted bentonite clay buffer boxes, and sealed deep underground in a stable geosphere. Because a DGR must remain functional for a million years, it is important to examine ancient natural systems that serve as analogues for planned DGR components. Specifically, studying the microbiology of natural analogue

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33

Minardi, A., E. Crisci, A. Ferrari, and L. Laloui. "Anisotropic volumetric behaviour of Opalinus clay shale upon suction variation." Géotechnique Letters 6, no. 2 (2016): 144–48. http://dx.doi.org/10.1680/jgele.16.00023.

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34

Barakat, Yara, Yu-Jun Cui, Nadia Mokni, Pierre Delage, and Frédéric Bernier. "Impact of alkalinity on the swelling behavior of Opalinus Clay." E3S Web of Conferences 205 (2020): 13017. http://dx.doi.org/10.1051/e3sconf/202020513017.

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35

Keller, Lukas M. "Porosity anisotropy of Opalinus Clay: implications for the poroelastic behaviour." Geophysical Journal International 208, no. 3 (2016): 1443–48. http://dx.doi.org/10.1093/gji/ggw469.

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36

Schuster, K., H. J. Alheid, and D. Böddener. "Seismic investigation of the Excavation damaged zone in Opalinus Clay." Engineering Geology 61, no. 2-3 (2001): 189–97. http://dx.doi.org/10.1016/s0013-7952(01)00054-0.

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37

Lerouge, Catherine, Stéphane Gaboreau, Sylvain Grangeon, et al. "In situ interactions between Opalinus Clay and Low Alkali Concrete." Physics and Chemistry of the Earth, Parts A/B/C 99 (June 2017): 3–21. http://dx.doi.org/10.1016/j.pce.2017.01.005.

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38

Keller, Lukas M., André Hilger, and Ingo Manke. "Impact of sand content on solute diffusion in Opalinus Clay." Applied Clay Science 112-113 (August 2015): 134–42. http://dx.doi.org/10.1016/j.clay.2015.04.009.

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39

Monfared, Mohammad, Jean Sulem, Pierre Delage, and Mehrdokht Mohajerani. "Temperature and Damage Impact on the Permeability of Opalinus Clay." Rock Mechanics and Rock Engineering 47, no. 1 (2013): 101–10. http://dx.doi.org/10.1007/s00603-013-0459-7.

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40

Orellana, L. F., M. M. Scuderi, C. Collettini, and M. Violay. "Frictional Properties of Opalinus Clay: Implications for Nuclear Waste Storage." Journal of Geophysical Research: Solid Earth 123, no. 1 (2018): 157–75. http://dx.doi.org/10.1002/2017jb014931.

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41

Clauer, Norbert, Miroslav Honty, Lander Frederickx, and Christophe Nussbaum. "Evaluation of a Long-Term Thermal Load on the Sealing Characteristics of Potential Sediments for a Deep Radioactive Waste Disposal." Sustainability 14, no. 21 (2022): 14004. http://dx.doi.org/10.3390/su142114004.

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An in situ and a batch heating experiment were applied on the fine-grained sediments of the Opalinus Clay from Mont Terri (Switzerland) and the Boom Clay of Mol (Belgium), both being currently studied as potential host formations for deep nuclear waste disposal. The purpose was here a test of the impact of a 100 °C temperature rise that is expected to be produced by nuclear waste in deep repositories. The experiment on the Opalinus Clay mimicked real conditions with 8-months operating heating devices stored in core drillings into the rock. The comparison of the major, trace, rare-earth element

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42

Winhausen, Lisa, Kavan Khaledi, Mohammadreza Jalali, Janos L. Urai, and Florian Amann. "Failure mode transition in Opalinus Clay: a hydro-mechanical and microstructural perspective." Solid Earth 13, no. 5 (2022): 901–15. http://dx.doi.org/10.5194/se-13-901-2022.

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Abstract. The way rocks deform under changing stress conditions can be described by different deformation modes, which is fundamental for understanding their rheology. For Opalinus Clay, which is regarded as a potential host rock for nuclear waste, we investigate the failure mode as a function of applied effective stress in laboratory experiments. Therefore, we performed consolidated undrained triaxial tests at different effective consolidation stresses from 2.5 to 16 MPa, in which samples were loaded parallel to bedding, and analysed the deformation structures using ion-beam polishing and ele

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43

Hendrix, Katrien, Nele Bleyen, Kristel Mijnendonckx, et al. "A long-running in situ experiment in clay: 12 years of the Bitumen–Nitrate–Clay interaction experiment at Mont Terri rock laboratory." Safety of Nuclear Waste Disposal 2 (September 6, 2023): 145–46. http://dx.doi.org/10.5194/sand-2-145-2023.

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Abstract. In various countries such as Belgium and Germany, deep clay formations are investigated as potential host rock to dispose of radioactive waste. Intermediate-level long-lived bituminised waste, produced from spent fuel reprocessing, is currently foreseen to be disposed of in such a deep repository. This type of waste typically contains large amounts of salts embedded in an organic matrix, of which NaNO3 is the most prevalent. NaNO3, along with radionuclides immobilised in the bitumen matrix, will slowly dissolve and leach out into the surrounding host rock. The transport and reactivit

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44

Khaledi, Kavan, Lisa Winhausen, Mohammadreza Jalali, and Florian Amann. "Constitutive modeling of clay shales in undrained conditions and its experimental verification for Opalinus Clay." International Journal of Rock Mechanics and Mining Sciences 171 (November 2023): 105588. http://dx.doi.org/10.1016/j.ijrmms.2023.105588.

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45

Krejci, Philipp, Thomas Gimmi, and Luc Robert Van Loon. "On the concentration-dependent diffusion of sorbed cesium in Opalinus Clay." Geochimica et Cosmochimica Acta 298 (April 2021): 149–66. http://dx.doi.org/10.1016/j.gca.2021.01.012.

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46

Vinsot, A., C. A. J. Appelo, M. Lundy, et al. "In situ diffusion test of hydrogen gas in the Opalinus Clay." Geological Society, London, Special Publications 400, no. 1 (2014): 563–78. http://dx.doi.org/10.1144/sp400.12.

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47

Sarout, Joel, Lionel Esteban, Claudio Delle Piane, Bruce Maney, and David N. Dewhurst. "Elastic anisotropy of Opalinus Clay under variable saturation and triaxial stress." Geophysical Journal International 198, no. 3 (2014): 1662–82. http://dx.doi.org/10.1093/gji/ggu231.

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48

Mayer, Gerhard, Georg Klubertanz, and Jean Croisé. "Modelling of an in situ ventilation experiment in the Opalinus Clay." Physics and Chemistry of the Earth, Parts A/B/C 32, no. 8-14 (2007): 629–38. http://dx.doi.org/10.1016/j.pce.2006.03.016.

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49

Giger, Silvio B., Russell T. Ewy, Valentina Favero, Rudy Stankovic, and Lukas M. Keller. "Consolidated-undrained triaxial testing of Opalinus Clay: Results and method validation." Geomechanics for Energy and the Environment 14 (June 2018): 16–28. http://dx.doi.org/10.1016/j.gete.2018.01.003.

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50

Ferrari, A., M. Rosone, M. Ziccarelli, and S. B. Giger. "The shear strength of Opalinus Clay shale in the remoulded state." Geomechanics for Energy and the Environment 21 (March 2020): 100142. http://dx.doi.org/10.1016/j.gete.2019.100142.

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