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...
Published in: | Journal of Structural Geology |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Elsevier
2021
|
Subjects: | |
Online Access: | https://hdl.handle.net/10037/23130 https://doi.org/10.1016/j.jsg.2021.104463 |
id |
ftunivtroemsoe:oai:munin.uit.no:10037/23130 |
---|---|
record_format |
openpolar |
spelling |
ftunivtroemsoe:oai:munin.uit.no:10037/23130 2023-05-15T14:26:56+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 2021-10-14 https://hdl.handle.net/10037/23130 https://doi.org/10.1016/j.jsg.2021.104463 eng eng Elsevier Journal of Structural Geology Norges forskningsråd: 228107 info:eu-repo/grantAgreement/RCN/PETROSENTR/228107/Norway/Research Centre for Arctic Petroleum Exploration/ARCEx/ Salomon, Rotevatn, Kristensen, Grundvåg, Henstra. Microstructure and fluid flow in the vicinity of basin bounding faults in rifts – The Dombjerg Fault, NE Greenland rift system. Journal of Structural Geology. 2021;153:1-17 FRIDAID 1950678 doi:10.1016/j.jsg.2021.104463 0191-8141 1873-1201 https://hdl.handle.net/10037/23130 openAccess Copyright 2021 The Author(s) VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2021 ftunivtroemsoe https://doi.org/10.1016/j.jsg.2021.104463 2021-11-24T23:54:45Z 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 Article in Journal/Newspaper Arctic Greenland University of Tromsø: Munin Open Research Archive Dombjerg ENVELOPE(-20.800,-20.800,74.550,74.550) Greenland Journal of Structural Geology 153 104463 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 |
spellingShingle |
VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 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 |
topic_facet |
VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 |
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 |
format |
Article in Journal/Newspaper |
author |
Salomon, Eric Rotevatn, Atle Kristensen, Thomas Berg Grundvåg, Sten-Andreas Henstra, Gijs Allard |
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/10037/23130 https://doi.org/10.1016/j.jsg.2021.104463 |
long_lat |
ENVELOPE(-20.800,-20.800,74.550,74.550) |
geographic |
Dombjerg Greenland |
geographic_facet |
Dombjerg Greenland |
genre |
Arctic Greenland |
genre_facet |
Arctic Greenland |
op_relation |
Journal of Structural Geology Norges forskningsråd: 228107 info:eu-repo/grantAgreement/RCN/PETROSENTR/228107/Norway/Research Centre for Arctic Petroleum Exploration/ARCEx/ Salomon, Rotevatn, Kristensen, Grundvåg, Henstra. Microstructure and fluid flow in the vicinity of basin bounding faults in rifts – The Dombjerg Fault, NE Greenland rift system. Journal of Structural Geology. 2021;153:1-17 FRIDAID 1950678 doi:10.1016/j.jsg.2021.104463 0191-8141 1873-1201 https://hdl.handle.net/10037/23130 |
op_rights |
openAccess Copyright 2021 The Author(s) |
op_doi |
https://doi.org/10.1016/j.jsg.2021.104463 |
container_title |
Journal of Structural Geology |
container_volume |
153 |
container_start_page |
104463 |
_version_ |
1766300421270274048 |