Modeling of Thermal-Hydrological-Chemical (THC) Processes During Waste Rock Weathering Under Permafrost Conditions
International audience The oxidation of sulfide minerals such as pyrite present in waste rock results in elevated sulfate, enhanced metal loadings and in many cases low pH conditions. Recently, many mines have opened in remote areas, including regions subject to permafrost conditions. In these regio...
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Online Access: | https://doi.org/10.3389/frwa.2021.645675 https://hal-mines-paristech.archives-ouvertes.fr/hal-03195917 |
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fttriple:oai:gotriple.eu:10670/1.votk3y 2023-05-15T17:55:39+02:00 Modeling of Thermal-Hydrological-Chemical (THC) Processes During Waste Rock Weathering Under Permafrost Conditions Yi, Xueying Su, Danyang Seigneur, Nicolas Mayer, Klaus Ulrich Centre de Géosciences (GEOSCIENCES) MINES ParisTech - École nationale supérieure des mines de Paris Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL) 2021-01-01 https://doi.org/10.3389/frwa.2021.645675 https://hal-mines-paristech.archives-ouvertes.fr/hal-03195917 en eng HAL CCSD Frontiers hal-03195917 doi:10.3389/frwa.2021.645675 10670/1.votk3y https://hal-mines-paristech.archives-ouvertes.fr/hal-03195917 lic_creative-commons Hyper Article en Ligne - Sciences de l'Homme et de la Société EISSN: 2624-9375 Frontiers in Water Frontiers in Water, Frontiers, 2021, 3, pp.645675. ⟨10.3389/frwa.2021.645675⟩ reactive transport modeling waste rock freeze-thaw (F/T) cycle permafrost thermal cover water quality geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2021 fttriple https://doi.org/10.3389/frwa.2021.645675 2023-01-22T17:45:31Z International audience The oxidation of sulfide minerals such as pyrite present in waste rock results in elevated sulfate, enhanced metal loadings and in many cases low pH conditions. Recently, many mines have opened in remote areas, including regions subject to permafrost conditions. In these regions, freeze-thaw cycles and the possible development of permafrost in mine waste add to the complexity of weathering processes, drainage volumes and mass loadings. To assess weathering in these waste rock piles, the reactive transport code MIN3P-HPC has been enhanced by implementing constitutive relationships related to freeze-thaw cycles that control flow patterns, solute transport, generation and transport of heat, as well as geochemical reactions and their rates. Simulations of a hypothetical pyrite-rich waste rock pile placed onto natural permafrost were conducted under reference climate conditions. Additionally, the effect of a warming climate was also studied through a sensitivity analysis. The simulation results indicate a potentially strong coupled effect of sulfide mineral weathering rates and a warming climate on the evolution and persistence of permafrost within waste rock piles and the release of acidic drainage. For relatively low sulfide mineral oxidation rates, the simulations indicate that permafrost can develop within waste rock piles, even under warming climate conditions. However, the results for low reactivity also show that mass loadings can increase by >50% in response to a slight warming of climate (3°C), relative to reference climate conditions. For the chosen reference reaction rates, permafrost develops under reference climate conditions in the simulated waste rock pile; however, permafrost cannot be maintained for a marginally warmer climate, leading to internal heating of the pile and substantially increased production of acidic drainage (>550%). For high reaction rates, the simulations suggest that internal heating takes place irrespective of climate conditions. Evaluation of thermal ... Article in Journal/Newspaper permafrost Unknown Rock Pile ENVELOPE(-65.167,-65.167,-68.417,-68.417) Frontiers in Water 3 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
reactive transport modeling waste rock freeze-thaw (F/T) cycle permafrost thermal cover water quality geo envir |
spellingShingle |
reactive transport modeling waste rock freeze-thaw (F/T) cycle permafrost thermal cover water quality geo envir Yi, Xueying Su, Danyang Seigneur, Nicolas Mayer, Klaus Ulrich Modeling of Thermal-Hydrological-Chemical (THC) Processes During Waste Rock Weathering Under Permafrost Conditions |
topic_facet |
reactive transport modeling waste rock freeze-thaw (F/T) cycle permafrost thermal cover water quality geo envir |
description |
International audience The oxidation of sulfide minerals such as pyrite present in waste rock results in elevated sulfate, enhanced metal loadings and in many cases low pH conditions. Recently, many mines have opened in remote areas, including regions subject to permafrost conditions. In these regions, freeze-thaw cycles and the possible development of permafrost in mine waste add to the complexity of weathering processes, drainage volumes and mass loadings. To assess weathering in these waste rock piles, the reactive transport code MIN3P-HPC has been enhanced by implementing constitutive relationships related to freeze-thaw cycles that control flow patterns, solute transport, generation and transport of heat, as well as geochemical reactions and their rates. Simulations of a hypothetical pyrite-rich waste rock pile placed onto natural permafrost were conducted under reference climate conditions. Additionally, the effect of a warming climate was also studied through a sensitivity analysis. The simulation results indicate a potentially strong coupled effect of sulfide mineral weathering rates and a warming climate on the evolution and persistence of permafrost within waste rock piles and the release of acidic drainage. For relatively low sulfide mineral oxidation rates, the simulations indicate that permafrost can develop within waste rock piles, even under warming climate conditions. However, the results for low reactivity also show that mass loadings can increase by >50% in response to a slight warming of climate (3°C), relative to reference climate conditions. For the chosen reference reaction rates, permafrost develops under reference climate conditions in the simulated waste rock pile; however, permafrost cannot be maintained for a marginally warmer climate, leading to internal heating of the pile and substantially increased production of acidic drainage (>550%). For high reaction rates, the simulations suggest that internal heating takes place irrespective of climate conditions. Evaluation of thermal ... |
author2 |
Centre de Géosciences (GEOSCIENCES) MINES ParisTech - École nationale supérieure des mines de Paris Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL) |
format |
Article in Journal/Newspaper |
author |
Yi, Xueying Su, Danyang Seigneur, Nicolas Mayer, Klaus Ulrich |
author_facet |
Yi, Xueying Su, Danyang Seigneur, Nicolas Mayer, Klaus Ulrich |
author_sort |
Yi, Xueying |
title |
Modeling of Thermal-Hydrological-Chemical (THC) Processes During Waste Rock Weathering Under Permafrost Conditions |
title_short |
Modeling of Thermal-Hydrological-Chemical (THC) Processes During Waste Rock Weathering Under Permafrost Conditions |
title_full |
Modeling of Thermal-Hydrological-Chemical (THC) Processes During Waste Rock Weathering Under Permafrost Conditions |
title_fullStr |
Modeling of Thermal-Hydrological-Chemical (THC) Processes During Waste Rock Weathering Under Permafrost Conditions |
title_full_unstemmed |
Modeling of Thermal-Hydrological-Chemical (THC) Processes During Waste Rock Weathering Under Permafrost Conditions |
title_sort |
modeling of thermal-hydrological-chemical (thc) processes during waste rock weathering under permafrost conditions |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://doi.org/10.3389/frwa.2021.645675 https://hal-mines-paristech.archives-ouvertes.fr/hal-03195917 |
long_lat |
ENVELOPE(-65.167,-65.167,-68.417,-68.417) |
geographic |
Rock Pile |
geographic_facet |
Rock Pile |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Hyper Article en Ligne - Sciences de l'Homme et de la Société EISSN: 2624-9375 Frontiers in Water Frontiers in Water, Frontiers, 2021, 3, pp.645675. ⟨10.3389/frwa.2021.645675⟩ |
op_relation |
hal-03195917 doi:10.3389/frwa.2021.645675 10670/1.votk3y https://hal-mines-paristech.archives-ouvertes.fr/hal-03195917 |
op_rights |
lic_creative-commons |
op_doi |
https://doi.org/10.3389/frwa.2021.645675 |
container_title |
Frontiers in Water |
container_volume |
3 |
_version_ |
1766163620070162432 |