Microstructure and fluid flow in the vicinity of basin bounding faults in rifts – The Dombjerg Fault, NE Greenland rift system
Faults commonly form loci for high fluid flux in sedimentary basins, where fluids, rocks and deformation processes frequently interact. Here, we elucidate the interaction of fluid flow, diagenesis and deformation near basin-bounding faults in sedimentary basins through a study in the vicinity (0–3.5...
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ftunivbergen:oai:bora.uib.no:11250/2827757 2023-05-15T16:28:06+02:00 Microstructure and fluid flow in the vicinity of basin bounding faults in rifts – The Dombjerg Fault, NE Greenland rift system Salomon, Eric Rotevatn, Atle Kristensen, Thomas Berg Grundvåg, Sten-Andreas Henstra, Gijs Allard 2021 application/pdf https://hdl.handle.net/11250/2827757 https://doi.org/10.1016/j.jsg.2021.104463 eng eng Elsevier Norges forskningsråd: 228107 urn:issn:0191-8141 https://hdl.handle.net/11250/2827757 https://doi.org/10.1016/j.jsg.2021.104463 cristin:1950678 Journal of Structural Geology. 2021, 153, 104463. Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Copyright 2021 the authors 104463 Journal of Structural Geology 153 Journal article Peer reviewed 2021 ftunivbergen https://doi.org/10.1016/j.jsg.2021.104463 2023-03-14T17:39:10Z Faults commonly form loci for high fluid flux in sedimentary basins, where fluids, rocks and deformation processes frequently interact. Here, we elucidate the interaction of fluid flow, diagenesis and deformation near basin-bounding faults in sedimentary basins through a study in the vicinity (0–3.5 km) of the Dombjerg Fault in the NE Greenland rift system. Due to fault-controlled fluid circulation, fault-proximal syn-rift clastics underwent pervasive calcite cementation, whereas uncemented clastics at some distance from the fault remained highly porous and friable. Correspondingly, two distinct deformation regimes developed to accommodate continued deformation: discrete brittle fractures formed in calcite cemented rocks, whereas cataclastic deformation bands formed in uncemented deposits. We show that low-permeable deformation bands forming in highly porous rocks were associated with localized host rock alteration, and chemical reduction of porosity along bands. In rocks with cementation-induced low porosity, brittle fractures created new pathways for fluids, but were subsequently filled with calcite. Occasionally, veins comprise multiple generations of microcrystalline calcite, likely precipitated from rapidly super-saturated fluids injected into the fractures. This suggests cemented deposits sealed uncemented compartments, where fluid overpressure developed. We conclude that compartmentalized flow regimes may form in fault-bounded basins, which has wide implications for assessments of potential carbon storage, hydrocarbon, groundwater, and geothermal sites publishedVersion Article in Journal/Newspaper Greenland University of Bergen: Bergen Open Research Archive (BORA-UiB) Greenland Dombjerg ENVELOPE(-20.800,-20.800,74.550,74.550) Journal of Structural Geology 153 104463 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
description |
Faults commonly form loci for high fluid flux in sedimentary basins, where fluids, rocks and deformation processes frequently interact. Here, we elucidate the interaction of fluid flow, diagenesis and deformation near basin-bounding faults in sedimentary basins through a study in the vicinity (0–3.5 km) of the Dombjerg Fault in the NE Greenland rift system. Due to fault-controlled fluid circulation, fault-proximal syn-rift clastics underwent pervasive calcite cementation, whereas uncemented clastics at some distance from the fault remained highly porous and friable. Correspondingly, two distinct deformation regimes developed to accommodate continued deformation: discrete brittle fractures formed in calcite cemented rocks, whereas cataclastic deformation bands formed in uncemented deposits. We show that low-permeable deformation bands forming in highly porous rocks were associated with localized host rock alteration, and chemical reduction of porosity along bands. In rocks with cementation-induced low porosity, brittle fractures created new pathways for fluids, but were subsequently filled with calcite. Occasionally, veins comprise multiple generations of microcrystalline calcite, likely precipitated from rapidly super-saturated fluids injected into the fractures. This suggests cemented deposits sealed uncemented compartments, where fluid overpressure developed. We conclude that compartmentalized flow regimes may form in fault-bounded basins, which has wide implications for assessments of potential carbon storage, hydrocarbon, groundwater, and geothermal sites publishedVersion |
format |
Article in Journal/Newspaper |
author |
Salomon, Eric Rotevatn, Atle Kristensen, Thomas Berg Grundvåg, Sten-Andreas Henstra, Gijs Allard |
spellingShingle |
Salomon, Eric Rotevatn, Atle Kristensen, Thomas Berg Grundvåg, Sten-Andreas Henstra, Gijs Allard Microstructure and fluid flow in the vicinity of basin bounding faults in rifts – The Dombjerg Fault, NE Greenland rift system |
author_facet |
Salomon, Eric Rotevatn, Atle Kristensen, Thomas Berg Grundvåg, Sten-Andreas Henstra, Gijs Allard |
author_sort |
Salomon, Eric |
title |
Microstructure and fluid flow in the vicinity of basin bounding faults in rifts – The Dombjerg Fault, NE Greenland rift system |
title_short |
Microstructure and fluid flow in the vicinity of basin bounding faults in rifts – The Dombjerg Fault, NE Greenland rift system |
title_full |
Microstructure and fluid flow in the vicinity of basin bounding faults in rifts – The Dombjerg Fault, NE Greenland rift system |
title_fullStr |
Microstructure and fluid flow in the vicinity of basin bounding faults in rifts – The Dombjerg Fault, NE Greenland rift system |
title_full_unstemmed |
Microstructure and fluid flow in the vicinity of basin bounding faults in rifts – The Dombjerg Fault, NE Greenland rift system |
title_sort |
microstructure and fluid flow in the vicinity of basin bounding faults in rifts – the dombjerg fault, ne greenland rift system |
publisher |
Elsevier |
publishDate |
2021 |
url |
https://hdl.handle.net/11250/2827757 https://doi.org/10.1016/j.jsg.2021.104463 |
long_lat |
ENVELOPE(-20.800,-20.800,74.550,74.550) |
geographic |
Greenland Dombjerg |
geographic_facet |
Greenland Dombjerg |
genre |
Greenland |
genre_facet |
Greenland |
op_source |
104463 Journal of Structural Geology 153 |
op_relation |
Norges forskningsråd: 228107 urn:issn:0191-8141 https://hdl.handle.net/11250/2827757 https://doi.org/10.1016/j.jsg.2021.104463 cristin:1950678 Journal of Structural Geology. 2021, 153, 104463. |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Copyright 2021 the authors |
op_doi |
https://doi.org/10.1016/j.jsg.2021.104463 |
container_title |
Journal of Structural Geology |
container_volume |
153 |
container_start_page |
104463 |
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1766017722844446720 |