Upper Jurassic – Lower Cretaceous of eastern Wollaston Forland, North-East Greenland: a distal marine record of an evolving rift
Two drill cores covering the Upper Jurassic – Lower Cretaceous succession in Wollaston Forland, NE Greenland, offer an exceptional insight into mud-accumulation in an evolving distal fault block. Previous studies have revealed the presence of long-lasting black mudstone accumulation extending throug...
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Geological Survey of Denmark and Greenland (GEUS)
2023
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ftjgeusbullet:oai:geusjournals.org:article/8349 2024-09-15T18:04:22+00:00 Upper Jurassic – Lower Cretaceous of eastern Wollaston Forland, North-East Greenland: a distal marine record of an evolving rift Hovikoski, Jussi Ineson, Jon R Olivarius, Mette Bojesen-Koefoed, Jørgen A Piasecki, Stefan Alsen, Peter Greenland 2023-12-21 application/pdf text/html text/xml application/epub+zip https://geusbulletin.org/index.php/geusb/article/view/8349 https://doi.org/10.34194/geusb.v55.8349 eng eng Geological Survey of Denmark and Greenland (GEUS) https://geusbulletin.org/index.php/geusb/article/view/8349/14433 https://geusbulletin.org/index.php/geusb/article/view/8349/14428 https://geusbulletin.org/index.php/geusb/article/view/8349/14432 https://geusbulletin.org/index.php/geusb/article/view/8349/14430 https://geusbulletin.org/index.php/geusb/article/view/8349 doi:10.34194/geusb.v55.8349 Copyright (c) 2023 Jussi Hovikoski, Jon R Ineson, Mette Olivarius, Jørgen A Bojesen-Koefoed, Stefan Piasecki, Peter Alsen https://creativecommons.org/licenses/by/4.0 GEUS Bulletin; Vol. 55 (2023): The Upper Jurassic – Lower Cretaceous of East and North-East Greenland: Rødryggen-1 and Brorson Halvø-1 boreholes, Wollaston Forland Basin 2597-2154 2597-2162 10.34194/geusb.v55i Late Jurassic Early Cretaceous Bernbjerg Formation Lindemans Bugt Formation Palnatokes Bjerg Formation Stratumbjerg Formation mudstone Greenland Earth Science Geology info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article. 2023 ftjgeusbullet https://doi.org/10.34194/geusb.v55.834910.34194/geusb.v55i 2024-06-23T23:34:47Z Two drill cores covering the Upper Jurassic – Lower Cretaceous succession in Wollaston Forland, NE Greenland, offer an exceptional insight into mud-accumulation in an evolving distal fault block. Previous studies have revealed the presence of long-lasting black mudstone accumulation extending through the oxygen-restricted early rift and rift climax phases (Bernbjerg and Lindemans Bugt Formations). Here, we revisit the depositional evolution recorded in these cores to present a detailed description of the sedimentary succession extending into the late syn-rift settings (Palnatokes Bjerg and Stratumbjerg Formations). The results indicate that the Kimmeridgian – lower Volgian early rift-phase was characterized by suspension settling, laminae-scale event deposition in a tectonically-affected, prodeltaic offshore setting. The event-related depositional processes are expressed by starved wave-ripples, scour-and-fill structures, putative mud floccule ripples, and mud-dominated gravity-flow deposits. During the middle Volgian – Ryazanian rift climax phase, the depositional environment evolved into a narrow half-graben that was detached from the proximal depocentre flanking the coarse sediment fueled deltaic coastline. The correlative sedimentary facies in the detached half-graben are bioclastic and pyrite-rich black mudstones documenting suspension settling and gravity flow/mass wasting deposition in sub-storm wave-base slope and basin-floor environments. Black shale sedimentation ended abruptly in the late Ryazanian when the accumulation of condensed, bioturbated deep sea marls was initiated linked to broader oceanographic reorganization concomitant with waning rift activity in the west. Deposition of red bioclastic mudstones with a common gravity-flow component characterized the Hauterivian, potentially representing final draping of the submerged fault block crest. The top of the cored succession is demarcated by the appearance of dark grey bioturbated mudstones of Barremian age, reflecting the onset of regionally ... Article in Journal/Newspaper East Greenland Greenland Wollaston forland GEUS Bulletin (Geological Survey of Denmark and Greenland) |
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Open Polar |
collection |
GEUS Bulletin (Geological Survey of Denmark and Greenland) |
op_collection_id |
ftjgeusbullet |
language |
English |
topic |
Late Jurassic Early Cretaceous Bernbjerg Formation Lindemans Bugt Formation Palnatokes Bjerg Formation Stratumbjerg Formation mudstone Greenland Earth Science Geology |
spellingShingle |
Late Jurassic Early Cretaceous Bernbjerg Formation Lindemans Bugt Formation Palnatokes Bjerg Formation Stratumbjerg Formation mudstone Greenland Earth Science Geology Hovikoski, Jussi Ineson, Jon R Olivarius, Mette Bojesen-Koefoed, Jørgen A Piasecki, Stefan Alsen, Peter Upper Jurassic – Lower Cretaceous of eastern Wollaston Forland, North-East Greenland: a distal marine record of an evolving rift |
topic_facet |
Late Jurassic Early Cretaceous Bernbjerg Formation Lindemans Bugt Formation Palnatokes Bjerg Formation Stratumbjerg Formation mudstone Greenland Earth Science Geology |
description |
Two drill cores covering the Upper Jurassic – Lower Cretaceous succession in Wollaston Forland, NE Greenland, offer an exceptional insight into mud-accumulation in an evolving distal fault block. Previous studies have revealed the presence of long-lasting black mudstone accumulation extending through the oxygen-restricted early rift and rift climax phases (Bernbjerg and Lindemans Bugt Formations). Here, we revisit the depositional evolution recorded in these cores to present a detailed description of the sedimentary succession extending into the late syn-rift settings (Palnatokes Bjerg and Stratumbjerg Formations). The results indicate that the Kimmeridgian – lower Volgian early rift-phase was characterized by suspension settling, laminae-scale event deposition in a tectonically-affected, prodeltaic offshore setting. The event-related depositional processes are expressed by starved wave-ripples, scour-and-fill structures, putative mud floccule ripples, and mud-dominated gravity-flow deposits. During the middle Volgian – Ryazanian rift climax phase, the depositional environment evolved into a narrow half-graben that was detached from the proximal depocentre flanking the coarse sediment fueled deltaic coastline. The correlative sedimentary facies in the detached half-graben are bioclastic and pyrite-rich black mudstones documenting suspension settling and gravity flow/mass wasting deposition in sub-storm wave-base slope and basin-floor environments. Black shale sedimentation ended abruptly in the late Ryazanian when the accumulation of condensed, bioturbated deep sea marls was initiated linked to broader oceanographic reorganization concomitant with waning rift activity in the west. Deposition of red bioclastic mudstones with a common gravity-flow component characterized the Hauterivian, potentially representing final draping of the submerged fault block crest. The top of the cored succession is demarcated by the appearance of dark grey bioturbated mudstones of Barremian age, reflecting the onset of regionally ... |
format |
Article in Journal/Newspaper |
author |
Hovikoski, Jussi Ineson, Jon R Olivarius, Mette Bojesen-Koefoed, Jørgen A Piasecki, Stefan Alsen, Peter |
author_facet |
Hovikoski, Jussi Ineson, Jon R Olivarius, Mette Bojesen-Koefoed, Jørgen A Piasecki, Stefan Alsen, Peter |
author_sort |
Hovikoski, Jussi |
title |
Upper Jurassic – Lower Cretaceous of eastern Wollaston Forland, North-East Greenland: a distal marine record of an evolving rift |
title_short |
Upper Jurassic – Lower Cretaceous of eastern Wollaston Forland, North-East Greenland: a distal marine record of an evolving rift |
title_full |
Upper Jurassic – Lower Cretaceous of eastern Wollaston Forland, North-East Greenland: a distal marine record of an evolving rift |
title_fullStr |
Upper Jurassic – Lower Cretaceous of eastern Wollaston Forland, North-East Greenland: a distal marine record of an evolving rift |
title_full_unstemmed |
Upper Jurassic – Lower Cretaceous of eastern Wollaston Forland, North-East Greenland: a distal marine record of an evolving rift |
title_sort |
upper jurassic – lower cretaceous of eastern wollaston forland, north-east greenland: a distal marine record of an evolving rift |
publisher |
Geological Survey of Denmark and Greenland (GEUS) |
publishDate |
2023 |
url |
https://geusbulletin.org/index.php/geusb/article/view/8349 https://doi.org/10.34194/geusb.v55.8349 |
op_coverage |
Greenland |
genre |
East Greenland Greenland Wollaston forland |
genre_facet |
East Greenland Greenland Wollaston forland |
op_source |
GEUS Bulletin; Vol. 55 (2023): The Upper Jurassic – Lower Cretaceous of East and North-East Greenland: Rødryggen-1 and Brorson Halvø-1 boreholes, Wollaston Forland Basin 2597-2154 2597-2162 10.34194/geusb.v55i |
op_relation |
https://geusbulletin.org/index.php/geusb/article/view/8349/14433 https://geusbulletin.org/index.php/geusb/article/view/8349/14428 https://geusbulletin.org/index.php/geusb/article/view/8349/14432 https://geusbulletin.org/index.php/geusb/article/view/8349/14430 https://geusbulletin.org/index.php/geusb/article/view/8349 doi:10.34194/geusb.v55.8349 |
op_rights |
Copyright (c) 2023 Jussi Hovikoski, Jon R Ineson, Mette Olivarius, Jørgen A Bojesen-Koefoed, Stefan Piasecki, Peter Alsen https://creativecommons.org/licenses/by/4.0 |
op_doi |
https://doi.org/10.34194/geusb.v55.834910.34194/geusb.v55i |
_version_ |
1810441857719599104 |