Geological and depositional setting of the Sirius Passet Lagerstätte (Early Cambrian), North Greenland
The Early Cambrian Sirius Passet Lagerstätte of North Greenland occurs in marine mudstones (Buen Formation) deposited in a slope environment along the eroded scarp of a pre-existing carbonate platform. The shallow-water platform is represented by dolostones of the Portfjeld Formation (Neoproterozoic...
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crcansciencepubl:10.1139/e11-018 2024-06-23T07:53:18+00:00 Geological and depositional setting of the Sirius Passet Lagerstätte (Early Cambrian), North Greenland Ineson, Jon R. Peel, John S. Bentley, Samuel 2011 http://dx.doi.org/10.1139/e11-018 http://www.nrcresearchpress.com/doi/full-xml/10.1139/e11-018 http://www.nrcresearchpress.com/doi/pdf/10.1139/e11-018 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 48, issue 8, page 1259-1281 ISSN 0008-4077 1480-3313 journal-article 2011 crcansciencepubl https://doi.org/10.1139/e11-018 2024-06-13T04:10:47Z The Early Cambrian Sirius Passet Lagerstätte of North Greenland occurs in marine mudstones (Buen Formation) deposited in a slope environment along the eroded scarp of a pre-existing carbonate platform. The shallow-water platform is represented by dolostones of the Portfjeld Formation (Neoproterozoic – earliest Cambrian), which record a belt of tide-swept subtidal ooid shoals and microbial patch reefs at the outer edge of the platform. Solution features and meteoric cements attest to exposure of the platform, accompanied by fracturing, mass wastage and erosional retreat of the escarpment producing slope talus, and extensive debris sheets and olistoliths in basinal deposits. The marine mud-dominated siliciclastics of the Buen Formation, deposited in slope and shelf environments, record the transgression and onlap of the degraded platform in the Early Cambrian. The Sirius Passet Lagerstätte has yielded an arthropod-dominated fossil assemblage of over 40 species, many showing exceptional preservation of soft tissues; the finely laminated mudstones hosting this fauna accumulated from suspension in a poorly oxygenated slope sub-environment, such as an erosional embayment or abandoned slope gully. Although taphonomic features suggest that the fauna is mainly parautochthonous, some components (e.g., sponges, worms, the halkieriids and certain sightless arthropods) may be truly autochthonous. Comparison of the Sirius Passet locality with the renowned Middle Cambrian Burgess Shale of western Canada reveals similarities in overall depositional and tectonic setting: both accumulated in deep water adjacent to the steep, eroded margins of carbonate platforms — settings that subsequently sheltered the faunas from tectonic and metamorphic obliteration. Article in Journal/Newspaper Greenland North Greenland Canadian Science Publishing Canada Greenland Burgess ENVELOPE(76.128,76.128,-69.415,-69.415) Sirius ENVELOPE(163.250,163.250,-84.133,-84.133) Canadian Journal of Earth Sciences 48 8 1259 1281 |
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Open Polar |
collection |
Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
The Early Cambrian Sirius Passet Lagerstätte of North Greenland occurs in marine mudstones (Buen Formation) deposited in a slope environment along the eroded scarp of a pre-existing carbonate platform. The shallow-water platform is represented by dolostones of the Portfjeld Formation (Neoproterozoic – earliest Cambrian), which record a belt of tide-swept subtidal ooid shoals and microbial patch reefs at the outer edge of the platform. Solution features and meteoric cements attest to exposure of the platform, accompanied by fracturing, mass wastage and erosional retreat of the escarpment producing slope talus, and extensive debris sheets and olistoliths in basinal deposits. The marine mud-dominated siliciclastics of the Buen Formation, deposited in slope and shelf environments, record the transgression and onlap of the degraded platform in the Early Cambrian. The Sirius Passet Lagerstätte has yielded an arthropod-dominated fossil assemblage of over 40 species, many showing exceptional preservation of soft tissues; the finely laminated mudstones hosting this fauna accumulated from suspension in a poorly oxygenated slope sub-environment, such as an erosional embayment or abandoned slope gully. Although taphonomic features suggest that the fauna is mainly parautochthonous, some components (e.g., sponges, worms, the halkieriids and certain sightless arthropods) may be truly autochthonous. Comparison of the Sirius Passet locality with the renowned Middle Cambrian Burgess Shale of western Canada reveals similarities in overall depositional and tectonic setting: both accumulated in deep water adjacent to the steep, eroded margins of carbonate platforms — settings that subsequently sheltered the faunas from tectonic and metamorphic obliteration. |
author2 |
Bentley, Samuel |
format |
Article in Journal/Newspaper |
author |
Ineson, Jon R. Peel, John S. |
spellingShingle |
Ineson, Jon R. Peel, John S. Geological and depositional setting of the Sirius Passet Lagerstätte (Early Cambrian), North Greenland |
author_facet |
Ineson, Jon R. Peel, John S. |
author_sort |
Ineson, Jon R. |
title |
Geological and depositional setting of the Sirius Passet Lagerstätte (Early Cambrian), North Greenland |
title_short |
Geological and depositional setting of the Sirius Passet Lagerstätte (Early Cambrian), North Greenland |
title_full |
Geological and depositional setting of the Sirius Passet Lagerstätte (Early Cambrian), North Greenland |
title_fullStr |
Geological and depositional setting of the Sirius Passet Lagerstätte (Early Cambrian), North Greenland |
title_full_unstemmed |
Geological and depositional setting of the Sirius Passet Lagerstätte (Early Cambrian), North Greenland |
title_sort |
geological and depositional setting of the sirius passet lagerstätte (early cambrian), north greenland |
publisher |
Canadian Science Publishing |
publishDate |
2011 |
url |
http://dx.doi.org/10.1139/e11-018 http://www.nrcresearchpress.com/doi/full-xml/10.1139/e11-018 http://www.nrcresearchpress.com/doi/pdf/10.1139/e11-018 |
long_lat |
ENVELOPE(76.128,76.128,-69.415,-69.415) ENVELOPE(163.250,163.250,-84.133,-84.133) |
geographic |
Canada Greenland Burgess Sirius |
geographic_facet |
Canada Greenland Burgess Sirius |
genre |
Greenland North Greenland |
genre_facet |
Greenland North Greenland |
op_source |
Canadian Journal of Earth Sciences volume 48, issue 8, page 1259-1281 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e11-018 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
48 |
container_issue |
8 |
container_start_page |
1259 |
op_container_end_page |
1281 |
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1802644877361545216 |