Time-resolved grain-scale 3D imaging of hydrofracturing in halite layers induced by gypsum dehydration and pore fluid pressure buildup

Marti, Sina; Fußeis, Florian; Butler, Ian B.; Marone, Federica; Gilgannon, James; Kilian, Rüdiger; Yang, Yue‐Heng

doi:10.1016/j.epsl.2020.116679

Cited by 14 publications

(14 citation statements)

References 33 publications

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“…The impact of fluids on pore pressure buildup and rock damages, either fluids released from dehydration reactions [Marti et al, 2021] or fluids promoting hydration reactions [Voltolini and Ajo-Franklin, 2020] have also been investigated.…”

Section: Rock Deformation and Mechano-chemical Couplingmentioning

confidence: 99%

Four-dimensional X-ray micro-tomography imaging of dynamic processes in geosciences

Noiriel¹,

Renard²

2022

Comptes Rendus. Géoscience

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The dynamic response of rocks to thermal, hydrodynamical, mechanical, and geochemical solicitations is of fundamental interest in several disciplines of geosciences, including geoengineering, geophysics, rock physics, hydrology, mineralogy, and environmental and soil sciences. From crystal shape to rock microstructure or pore space and fluid distribution, parameters characterizing the rock physico-chemical properties evolve at different time and spatial scales. X-ray micro-tomography (XMT), as a non-invasive and non-destructive imaging technique, offers an unprecedented opportunity to add the fourth dimension, i.e. time, to the three-dimensional spatial visualization of rock and mineral microstructures. The technique is increasingly used to explore dynamic processes in porous and fractured rocks, thanks to synchrotron sources and laboratory XMT scanners, new generations of detectors, and increasing computational power. Image processing allows for tracking the evolution of the fluid-fluid or fluid-mineral interfaces as well as measuring incremental deformations, as rocks deform and react through time under in situ conditions of the sub-surface. Here, we review recent advances in 4D X-ray micro-tomography applied to thermohydro-mechano-chemical (THMC) sub-surface processes where fluids, porosity, minerals, and rock microstructures evolve together.Keywords. X-ray micro-tomography, 4D imaging, Mineral reactivity, Reactive flow, Rock deformation, Multi-phase flow, Thermo-hydro-mechano-chemical processes.Note. Submission by invitation of the editorial board. Catherine Noiriel is the 2020 recipient of the Prix Schlumberger of the Académie des sciences / Soumission sur invitation du comité de rédaction. Catherine Noiriel est la lauréate 2020 du Prix Schlumberger de l'Académie des sciences.

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Section: Rock Deformation and Mechano-chemical Couplingmentioning

confidence: 99%

Four-dimensional X-ray micro-tomography imaging of dynamic processes in geosciences

Noiriel¹,

Renard²

2022

Comptes Rendus. Géoscience

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“…3. Rock permeability increases until the pore space becomes interconnected again (Figure 11c, left panel), e.g., due to ongoing devolatilization reactions in the host rock, which elevates the pore fluid pressure (e.g., Connolly, 1997;Marti et al, 2021;Oliver & Bons, 2001;Taetz et al, 2018), or due to changing external stresses that might cause various forms of rock dilatancy (e.g., Sibson, 1994;Fusseis et al, 2009;Viete et al, 2018). The increasing permeability allows for increasing fluid percolation and faster element transport in the rock, which facilitates REE transport and replenishes the REE budget available for the growing garnet (Figure 11c, middle panel).…”

Section: A Conceptual Model Of Garnet Growthmentioning

confidence: 99%

Discrimination of thermodynamic and kinetic contributions to the heavy rare earth element patterns in metamorphic garnet

Konrad‐Schmolke

Halama

Chew

et al. 2022

Journal Metamorphic Geology

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Variations of rare earth element (REE) concentrations in metamorphic garnet are an important source of information of geodynamic and geochemical processes in the deeper Earth. In order to extract this information, the thermodynamic equilibrium and kinetic contributions of the REE uptake in garnet must be distinguished and quantified. Utilizing high-resolution trace element and μ-Raman mapping together with combined thermodynamic-geochemicaldiffusion models, we demonstrate that the equilibrium and kinetic aspects of the REE uptake in metamorphic garnet can be discriminated by interpreting 2D trace element mapping in a single sample. The heavy (H) REE (Tb to Lu) zoning in the investigated garnet from a high-pressure blueschist comprises an inner part with an overall decrease from core to inner rim, followed by a concentric zone of HREE enrichment and a drastic HREE decrease towards the outermost rim. The central peak in the garnet core decreases in intensity with

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“…Due to its modularity, which allows individual components to be adopted to specific conditions, the rig is extremely flexible and has been used in a range of room-temperature and heated experiments that explored rock deformation at the PSICHÉ beamline of Synchrotron Soleil, at beamline 2-BM at APS, at the TOMCAT beamline at SLS, and at I12JEEP at DLS. Its capabilities are outlined in [8,9].…”

Section: Mjölnirmentioning

confidence: 99%

“…Figure 2: Mjölnir in two configurations: set up for brittle rock deformation experiments at room temperature at SOLEIL's PSICHE beamline(a,[8]) and for heated halite-gypsum deformation experiments at SLS' TOMCAT beamline (b,[9]). The triaxial Stor Mjölnir rig accommodates cylindrical samples (10 mm diameter and 25 mm long) and is made from grade 5 Ti alloy with 7068 Al alloy used for the x-ray transparent pressure vessel (Figure3a).…”

mentioning

confidence: 99%

4-dimensional in-situ/in-operando µ-CT imaging of geological processes at elevated temperatures and pressures using x-rays

Fußeis¹,

Butler²,

Freitas³

et al. 2022

eJNDT

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Micro-scale processes have a profound effect on geoenergy applications, ore formation, underground waste storage, geomechanics, and seismic and volcanic hazards. Understanding these processes is thus important for most of our societal interests in the geosphere. However, important aspects of these processes are still poorly understood. This is because replicating the ambient conditions, in particular high pressures and temperatures, in experiments remains challenging. The means to document progress during experiments are limited and, as a consequence, the results of classical 'black-box experiments', equipped only with indirect monitoring systems, are often inconclusive. In-situ imaging of geological processes in experimental studies allows the direct observation and quantification of grain-scale developments that define the macro-scale behavior of geomaterials,with the limitation of small sample sizes. In-situ imaging thus provides a possibility to overcome some of the limitations of classical experiments. Conducting such in-situ µ-CT experiments at the relevant conditions while simultaneously acquiring image data of sufficient quality comes with its own challenges, and extracting relevant quantitative information from the resulting image data remains difficult. Here we present an overview over our activities in that field over the past decade. We outline an array of bespoke x-ray-transparent experimental environments that can recreate a wide range of geological conditions, and demonstrate how previously inaccessible information is gathered from the resulting data using advanced image analysis with the open-source python library SPAM. We demonstrate that the technique promises to significantly advance our understanding of processes shaping the geosphere.

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Time-resolved grain-scale 3D imaging of hydrofracturing in halite layers induced by gypsum dehydration and pore fluid pressure buildup

Cited by 14 publications

References 33 publications

Four-dimensional X-ray micro-tomography imaging of dynamic processes in geosciences

Four-dimensional X-ray micro-tomography imaging of dynamic processes in geosciences

Discrimination of thermodynamic and kinetic contributions to the heavy rare earth element patterns in metamorphic garnet

4-dimensional in-situ/in-operando µ-CT imaging of geological processes at elevated temperatures and pressures using x-rays

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