Jurassic stratigraphy of East Greenland
The East Greenland Rift Basin comprises a series of Jurassic subbasins with different crustal configurations, and somewhat different tectonic histories and styles. The roughly N–S elongated basin is exposed in central and northern East Greenland over a length of more than 600 km and a width of up to...
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Format: | Article in Journal/Newspaper |
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Geological Survey of Denmark and Greenland (GEUS)
2021
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Online Access: | https://geusbulletin.org/index.php/geusb/article/view/6521 https://doi.org/10.34194/geusb.v46.6521 |
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ftjgeusbullet:oai:geusjournals.org:article/6521 |
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openpolar |
institution |
Open Polar |
collection |
GEUS Bulletin (Geological Survey of Denmark and Greenland) |
op_collection_id |
ftjgeusbullet |
language |
English |
topic |
East Greenland stratigraphy siliciclastic sediments uppermost Triassic Jurassic |
spellingShingle |
East Greenland stratigraphy siliciclastic sediments uppermost Triassic Jurassic Surlyk, Finn Alsen, Peter Bjerager, Morten Dam, Gregers Engkilde, Michael Hansen, Carina Fabricius Larsen, Michael Noe-Nygaard, Nanna Piasecki, Stefan Therkelsen, Jens Vosgerau, Henrik Jurassic stratigraphy of East Greenland |
topic_facet |
East Greenland stratigraphy siliciclastic sediments uppermost Triassic Jurassic |
description |
The East Greenland Rift Basin comprises a series of Jurassic subbasins with different crustal configurations, and somewhat different tectonic histories and styles. The roughly N–S elongated basin is exposed in central and northern East Greenland over a length of more than 600 km and a width of up to 250 km. The southernmost exposures are found in the largest subbasin in Jameson Land, while the northernmost exposures are on Store Koldewey and in Germania Land. The focus of the present revision is on the Jurassic, but the uppermost Triassic and lowermost Cretaceous successions are included as they are genetically related to the Jurassic succession. The whole succession forms an overall transgressive–regressive megacycle with the highest sea level and maximum transgression in the Kimmeridgian. The latest Triassic – Early Jurassic was a time of tectonic quiescence in East Greenland. Lower Jurassic deposits are up to about 950 m thick and are restricted to Jameson Land and a small down-faulted outlier in southernmost Liverpool Land. The Lower Jurassic succession forms an overall stratigraphic layer-cake package that records a shift from Rhaetian–Sinemurian fluvio-lacustrine to Pliensbachian – early Bajocian mainly shallow marine sedimentation. Onset of rifting in the late Bajocian resulted in complete reorganisation of basin configuration and drainage patterns, and the depositional basin expanded far towards the north. Post-lower Bajocian early-rift deposits are up to about 500–600 m thick and are exposed in Jameson Land, Liverpool Land, Milne Land, Traill Ø, Geographical Society Ø, Hold with Hope, Clavering Ø, Wollaston Forland, Kuhn Ø, Th. Thomsen Land, Hochstetter Forland, Store Koldewey and Germania Land. Upper Jurassic rift-climax strata reach thicknesses of several kilometres and are exposed in the same areas with the exception of Liverpool Land and Germania Land. In the southern part of the basin, the upper Bajocian – Kimmeridgian succession consists of stepwise backstepping units starting with shallow marine sandstones and ending with relatively deep marine mudstones in some places with sandy gravity-flow deposits and injectites. In the Jameson Land and Milne Land Subbasins, the uppermost Jurassic – lowermost Cretaceous (Volgian–Ryazanian) succession consists of forestepping stacked shelf-margin sandstone bodies with associated slope and basinal mudstones and mass-flow sandstones. North of Jameson Land, block-faulting and tilting began in the late Bajocian and culminated in the middle Volgian with formation of strongly tilted fault blocks, and the succession records continued stepwise deepening. In the Wollaston Forland – Kuhn Ø area, the Volgian is represented by a thick wedge of deep-water conglomerates and pebbly sandstones passing basinwards into mudstones deposited in fault-attached slope aprons and coalescent submarine fans. The lithostratigraphic scheme established mainly in the 1970s and early 1980s is here revised on the basis of work undertaken over subsequent years. The entire Jurassic succession, including the uppermost Triassic (Rhaetian) and lowermost Cretaceous (Ryazanian–Hauterivian), forms the Jameson Land Supergroup. The supergroup is subdivided into the Kap Stewart, Neill Klinter, Vardekløft, Hall Bredning, and Wollaston Forland Groups, which are subdivided into 25 formations and 48 members. Many of these are revised, and 3 new formations and 14 new members are introduced. |
format |
Article in Journal/Newspaper |
author |
Surlyk, Finn Alsen, Peter Bjerager, Morten Dam, Gregers Engkilde, Michael Hansen, Carina Fabricius Larsen, Michael Noe-Nygaard, Nanna Piasecki, Stefan Therkelsen, Jens Vosgerau, Henrik |
author_facet |
Surlyk, Finn Alsen, Peter Bjerager, Morten Dam, Gregers Engkilde, Michael Hansen, Carina Fabricius Larsen, Michael Noe-Nygaard, Nanna Piasecki, Stefan Therkelsen, Jens Vosgerau, Henrik |
author_sort |
Surlyk, Finn |
title |
Jurassic stratigraphy of East Greenland |
title_short |
Jurassic stratigraphy of East Greenland |
title_full |
Jurassic stratigraphy of East Greenland |
title_fullStr |
Jurassic stratigraphy of East Greenland |
title_full_unstemmed |
Jurassic stratigraphy of East Greenland |
title_sort |
jurassic stratigraphy of east greenland |
publisher |
Geological Survey of Denmark and Greenland (GEUS) |
publishDate |
2021 |
url |
https://geusbulletin.org/index.php/geusb/article/view/6521 https://doi.org/10.34194/geusb.v46.6521 |
long_lat |
ENVELOPE(23.567,23.567,65.533,65.533) ENVELOPE(-54.065,-54.065,49.700,49.700) ENVELOPE(-23.500,-23.500,71.167,71.167) ENVELOPE(-60.790,-60.790,-63.668,-63.668) ENVELOPE(-66.232,-66.232,-65.794,-65.794) ENVELOPE(-18.820,-18.820,76.364,76.364) ENVELOPE(-22.200,-22.200,70.917,70.917) ENVELOPE(-19.861,-19.861,74.476,74.476) ENVELOPE(-21.094,-21.094,73.714,73.714) ENVELOPE(-22.633,-22.633,70.433,70.433) ENVELOPE(-23.250,-23.250,72.950,72.950) ENVELOPE(-23.167,-23.167,72.533,72.533) ENVELOPE(-20.500,-20.500,75.617,75.617) ENVELOPE(-26.750,-26.750,70.683,70.683) ENVELOPE(-20.042,-20.042,77.129,77.129) ENVELOPE(-21.128,-21.128,74.285,74.285) ENVELOPE(-22.617,-22.617,70.583,70.583) ENVELOPE(-20.267,-20.267,74.851,74.851) ENVELOPE(-24.750,-24.750,70.833,70.833) |
geographic |
Greenland Kap Tilting Jameson Land Wollaston Thomsen Store Koldewey Liverpool Land Wollaston Forland Hold with Hope Kap Stewart Geographical Society Ø Traill Ø Hochstetter Forland Milne Land Germania Land Clavering Ø Neill Klinter Kuhn Ø Hall Bredning |
geographic_facet |
Greenland Kap Tilting Jameson Land Wollaston Thomsen Store Koldewey Liverpool Land Wollaston Forland Hold with Hope Kap Stewart Geographical Society Ø Traill Ø Hochstetter Forland Milne Land Germania Land Clavering Ø Neill Klinter Kuhn Ø Hall Bredning |
genre |
East Greenland Germania land Greenland Kuhn ø Milne Land Store koldewey Traill ø Wollaston forland |
genre_facet |
East Greenland Germania land Greenland Kuhn ø Milne Land Store koldewey Traill ø Wollaston forland |
op_source |
GEUS Bulletin; Vol. 46 (2021): Jurassic stratigraphy of East Greenland 2597-2154 2597-2162 |
op_relation |
https://geusbulletin.org/index.php/geusb/article/view/6521/14180 https://geusbulletin.org/index.php/geusb/article/view/6521/14177 https://geusbulletin.org/index.php/geusb/article/view/6521/14178 https://geusbulletin.org/index.php/geusb/article/view/6521/14179 https://geusbulletin.org/index.php/geusb/article/view/6521 doi:10.34194/geusb.v46.6521 |
op_rights |
Copyright (c) 2021 Finn Surlyk, Peter Alsen, Morten Bjerager, Gregers Dam, Michael Engkilde, Carina Fabricius Hansen, Michael Larsen, Nanna Noe-Nygaard, Stefan Piasecki, Jens Therkelsen, Henrik Vosgerau https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.34194/geusb.v46.6521 |
container_title |
GEUS Bulletin |
container_volume |
46 |
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1766399285863120896 |
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ftjgeusbullet:oai:geusjournals.org:article/6521 2023-05-15T16:03:36+02:00 Jurassic stratigraphy of East Greenland Surlyk, Finn Alsen, Peter Bjerager, Morten Dam, Gregers Engkilde, Michael Hansen, Carina Fabricius Larsen, Michael Noe-Nygaard, Nanna Piasecki, Stefan Therkelsen, Jens Vosgerau, Henrik 2021-07-09 application/pdf text/html text/xml application/epub+zip https://geusbulletin.org/index.php/geusb/article/view/6521 https://doi.org/10.34194/geusb.v46.6521 eng eng Geological Survey of Denmark and Greenland (GEUS) https://geusbulletin.org/index.php/geusb/article/view/6521/14180 https://geusbulletin.org/index.php/geusb/article/view/6521/14177 https://geusbulletin.org/index.php/geusb/article/view/6521/14178 https://geusbulletin.org/index.php/geusb/article/view/6521/14179 https://geusbulletin.org/index.php/geusb/article/view/6521 doi:10.34194/geusb.v46.6521 Copyright (c) 2021 Finn Surlyk, Peter Alsen, Morten Bjerager, Gregers Dam, Michael Engkilde, Carina Fabricius Hansen, Michael Larsen, Nanna Noe-Nygaard, Stefan Piasecki, Jens Therkelsen, Henrik Vosgerau https://creativecommons.org/licenses/by/4.0 CC-BY GEUS Bulletin; Vol. 46 (2021): Jurassic stratigraphy of East Greenland 2597-2154 2597-2162 East Greenland stratigraphy siliciclastic sediments uppermost Triassic Jurassic info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed single-volume work. Submissions strictly by arrangement with the editorial office. 2021 ftjgeusbullet https://doi.org/10.34194/geusb.v46.6521 2022-03-15T17:22:28Z The East Greenland Rift Basin comprises a series of Jurassic subbasins with different crustal configurations, and somewhat different tectonic histories and styles. The roughly N–S elongated basin is exposed in central and northern East Greenland over a length of more than 600 km and a width of up to 250 km. The southernmost exposures are found in the largest subbasin in Jameson Land, while the northernmost exposures are on Store Koldewey and in Germania Land. The focus of the present revision is on the Jurassic, but the uppermost Triassic and lowermost Cretaceous successions are included as they are genetically related to the Jurassic succession. The whole succession forms an overall transgressive–regressive megacycle with the highest sea level and maximum transgression in the Kimmeridgian. The latest Triassic – Early Jurassic was a time of tectonic quiescence in East Greenland. Lower Jurassic deposits are up to about 950 m thick and are restricted to Jameson Land and a small down-faulted outlier in southernmost Liverpool Land. The Lower Jurassic succession forms an overall stratigraphic layer-cake package that records a shift from Rhaetian–Sinemurian fluvio-lacustrine to Pliensbachian – early Bajocian mainly shallow marine sedimentation. Onset of rifting in the late Bajocian resulted in complete reorganisation of basin configuration and drainage patterns, and the depositional basin expanded far towards the north. Post-lower Bajocian early-rift deposits are up to about 500–600 m thick and are exposed in Jameson Land, Liverpool Land, Milne Land, Traill Ø, Geographical Society Ø, Hold with Hope, Clavering Ø, Wollaston Forland, Kuhn Ø, Th. Thomsen Land, Hochstetter Forland, Store Koldewey and Germania Land. Upper Jurassic rift-climax strata reach thicknesses of several kilometres and are exposed in the same areas with the exception of Liverpool Land and Germania Land. In the southern part of the basin, the upper Bajocian – Kimmeridgian succession consists of stepwise backstepping units starting with shallow marine sandstones and ending with relatively deep marine mudstones in some places with sandy gravity-flow deposits and injectites. In the Jameson Land and Milne Land Subbasins, the uppermost Jurassic – lowermost Cretaceous (Volgian–Ryazanian) succession consists of forestepping stacked shelf-margin sandstone bodies with associated slope and basinal mudstones and mass-flow sandstones. North of Jameson Land, block-faulting and tilting began in the late Bajocian and culminated in the middle Volgian with formation of strongly tilted fault blocks, and the succession records continued stepwise deepening. In the Wollaston Forland – Kuhn Ø area, the Volgian is represented by a thick wedge of deep-water conglomerates and pebbly sandstones passing basinwards into mudstones deposited in fault-attached slope aprons and coalescent submarine fans. The lithostratigraphic scheme established mainly in the 1970s and early 1980s is here revised on the basis of work undertaken over subsequent years. The entire Jurassic succession, including the uppermost Triassic (Rhaetian) and lowermost Cretaceous (Ryazanian–Hauterivian), forms the Jameson Land Supergroup. The supergroup is subdivided into the Kap Stewart, Neill Klinter, Vardekløft, Hall Bredning, and Wollaston Forland Groups, which are subdivided into 25 formations and 48 members. Many of these are revised, and 3 new formations and 14 new members are introduced. Article in Journal/Newspaper East Greenland Germania land Greenland Kuhn ø Milne Land Store koldewey Traill ø Wollaston forland GEUS Bulletin (Geological Survey of Denmark and Greenland) Greenland Kap ENVELOPE(23.567,23.567,65.533,65.533) Tilting ENVELOPE(-54.065,-54.065,49.700,49.700) Jameson Land ENVELOPE(-23.500,-23.500,71.167,71.167) Wollaston ENVELOPE(-60.790,-60.790,-63.668,-63.668) Thomsen ENVELOPE(-66.232,-66.232,-65.794,-65.794) Store Koldewey ENVELOPE(-18.820,-18.820,76.364,76.364) Liverpool Land ENVELOPE(-22.200,-22.200,70.917,70.917) Wollaston Forland ENVELOPE(-19.861,-19.861,74.476,74.476) Hold with Hope ENVELOPE(-21.094,-21.094,73.714,73.714) Kap Stewart ENVELOPE(-22.633,-22.633,70.433,70.433) Geographical Society Ø ENVELOPE(-23.250,-23.250,72.950,72.950) Traill Ø ENVELOPE(-23.167,-23.167,72.533,72.533) Hochstetter Forland ENVELOPE(-20.500,-20.500,75.617,75.617) Milne Land ENVELOPE(-26.750,-26.750,70.683,70.683) Germania Land ENVELOPE(-20.042,-20.042,77.129,77.129) Clavering Ø ENVELOPE(-21.128,-21.128,74.285,74.285) Neill Klinter ENVELOPE(-22.617,-22.617,70.583,70.583) Kuhn Ø ENVELOPE(-20.267,-20.267,74.851,74.851) Hall Bredning ENVELOPE(-24.750,-24.750,70.833,70.833) GEUS Bulletin 46 |