Creep of Basalts Undergoing Carbonation: Effect of Rock-Fluid Interaction
Geological carbon sequestration provides permanent CO2 storage to mitigate the current high concentration of CO2 in the atmosphere. CO2 mineralization in basalts has been proven to be one of the most secure storage options. For successful implementation and future improvements of this technology, th...
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ftzenodo:oai:zenodo.org:4926587 2023-05-15T16:51:25+02:00 Creep of Basalts Undergoing Carbonation: Effect of Rock-Fluid Interaction Xing, Tiange Ghaffari, O. Hamed Mok, Ulrich Pec, Matej 2021-12-11 https://zenodo.org/record/4926587 https://doi.org/10.5281/zenodo.4926587 unknown doi:10.5281/zenodo.4926586 https://zenodo.org/record/4926587 https://doi.org/10.5281/zenodo.4926587 oai:zenodo.org:4926587 info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/legalcode Creep Deformation Geological Carbon Sequestration Rock-Fluid Interaction info:eu-repo/semantics/other dataset 2021 ftzenodo https://doi.org/10.5281/zenodo.492658710.5281/zenodo.4926586 2023-03-11T00:05:11Z Geological carbon sequestration provides permanent CO2 storage to mitigate the current high concentration of CO2 in the atmosphere. CO2 mineralization in basalts has been proven to be one of the most secure storage options. For successful implementation and future improvements of this technology, the time-dependent deformation behavior of basalts in presence of reactive fluids needs to be studied in detail. We conducted load stepping creep experiments on basalts from the CarbFix site (Iceland) under several pore fluid conditions (dry, H2O-saturated and H2O+CO2-saturated) at temperature, T≈80°C and effective pressure, Peff = 50 MPa, during which we collected mechanical, acoustic and pore fluid chemistry data. We observed transient creep at stresses as low as 11% of the ultimate failure strength, well below the stress level at the onset of bulk dilatancy. Acoustic emissions (AEs) correlated strongly with strain accumulation, indicating that the creep deformation was a brittle process in agreement with microstructural observations. The rate and magnitude of AEs were higher in fluid-saturated experiments than in dry conditions. The creep data can be empirically fitted using either a log - time or power law time model with stress dependent fitting parameters. We infer that the predominant mechanism governing creep deformation is time- and stress-dependent sub-critical dilatant cracking. Our results suggest that the presence of aqueous fluids exerts first order control on creep deformation of basaltic rocks, while the composition of the fluids plays only a secondary role under the studied conditions. Dataset Iceland Zenodo |
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Open Polar |
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unknown |
topic |
Creep Deformation Geological Carbon Sequestration Rock-Fluid Interaction |
spellingShingle |
Creep Deformation Geological Carbon Sequestration Rock-Fluid Interaction Xing, Tiange Ghaffari, O. Hamed Mok, Ulrich Pec, Matej Creep of Basalts Undergoing Carbonation: Effect of Rock-Fluid Interaction |
topic_facet |
Creep Deformation Geological Carbon Sequestration Rock-Fluid Interaction |
description |
Geological carbon sequestration provides permanent CO2 storage to mitigate the current high concentration of CO2 in the atmosphere. CO2 mineralization in basalts has been proven to be one of the most secure storage options. For successful implementation and future improvements of this technology, the time-dependent deformation behavior of basalts in presence of reactive fluids needs to be studied in detail. We conducted load stepping creep experiments on basalts from the CarbFix site (Iceland) under several pore fluid conditions (dry, H2O-saturated and H2O+CO2-saturated) at temperature, T≈80°C and effective pressure, Peff = 50 MPa, during which we collected mechanical, acoustic and pore fluid chemistry data. We observed transient creep at stresses as low as 11% of the ultimate failure strength, well below the stress level at the onset of bulk dilatancy. Acoustic emissions (AEs) correlated strongly with strain accumulation, indicating that the creep deformation was a brittle process in agreement with microstructural observations. The rate and magnitude of AEs were higher in fluid-saturated experiments than in dry conditions. The creep data can be empirically fitted using either a log - time or power law time model with stress dependent fitting parameters. We infer that the predominant mechanism governing creep deformation is time- and stress-dependent sub-critical dilatant cracking. Our results suggest that the presence of aqueous fluids exerts first order control on creep deformation of basaltic rocks, while the composition of the fluids plays only a secondary role under the studied conditions. |
format |
Dataset |
author |
Xing, Tiange Ghaffari, O. Hamed Mok, Ulrich Pec, Matej |
author_facet |
Xing, Tiange Ghaffari, O. Hamed Mok, Ulrich Pec, Matej |
author_sort |
Xing, Tiange |
title |
Creep of Basalts Undergoing Carbonation: Effect of Rock-Fluid Interaction |
title_short |
Creep of Basalts Undergoing Carbonation: Effect of Rock-Fluid Interaction |
title_full |
Creep of Basalts Undergoing Carbonation: Effect of Rock-Fluid Interaction |
title_fullStr |
Creep of Basalts Undergoing Carbonation: Effect of Rock-Fluid Interaction |
title_full_unstemmed |
Creep of Basalts Undergoing Carbonation: Effect of Rock-Fluid Interaction |
title_sort |
creep of basalts undergoing carbonation: effect of rock-fluid interaction |
publishDate |
2021 |
url |
https://zenodo.org/record/4926587 https://doi.org/10.5281/zenodo.4926587 |
genre |
Iceland |
genre_facet |
Iceland |
op_relation |
doi:10.5281/zenodo.4926586 https://zenodo.org/record/4926587 https://doi.org/10.5281/zenodo.4926587 oai:zenodo.org:4926587 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/legalcode |
op_doi |
https://doi.org/10.5281/zenodo.492658710.5281/zenodo.4926586 |
_version_ |
1766041521024401408 |