Re-evaluation of the Mesozoic–Cenozoic biostratigraphy of the Laurentian Subbasin of the Scotian Basin, offshore eastern Canada
We use new and existing nannofossil, palynological, and microfossil biostratigraphic data in conjunction with lithologic and geophysical logs from four wells to establish a series of sequence-stratigraphic events in the Mesozoic–Cenozoic of the Laurentian Subbasin of offshore Newfoundland, eastern C...
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Atlantic Geoscience Society
2023
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ftuninewbrunojs:oai:ojs.journals.lib.unb.ca:article/33343 2024-01-14T10:08:47+01:00 Re-evaluation of the Mesozoic–Cenozoic biostratigraphy of the Laurentian Subbasin of the Scotian Basin, offshore eastern Canada Réévaluation de la biostratigraphie mésozoïque-cénozoïque du sous-bassin Laurentien du bassin Scotian, au large des côtes de l’est du Canada Weston, Janice F. MacRae, R. Andrew Ascoli, Piero Cooper, M. Kevin E. Fensome, Robert A. Shaw, David Williams, Graham L. 2023-11-24 application/pdf https://journals.lib.unb.ca/index.php/ag/article/view/33343 eng eng Atlantic Geoscience Society https://journals.lib.unb.ca/index.php/ag/article/view/33343/1882529549 https://journals.lib.unb.ca/index.php/ag/article/view/33343/1882529550 https://journals.lib.unb.ca/index.php/ag/article/view/33343/1882529551 https://journals.lib.unb.ca/index.php/ag/article/view/33343/1882529553 https://journals.lib.unb.ca/index.php/ag/article/view/33343/1882529554 https://journals.lib.unb.ca/index.php/ag/article/view/33343/1882529555 https://journals.lib.unb.ca/index.php/ag/article/view/33343 Copyright (c) 2023 Atlantic Geoscience Atlantic Geoscience; Vol. 59 (2023); 183 - 239 2564-2987 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion research-article 2023 ftuninewbrunojs 2023-12-16T23:59:23Z We use new and existing nannofossil, palynological, and microfossil biostratigraphic data in conjunction with lithologic and geophysical logs from four wells to establish a series of sequence-stratigraphic events in the Mesozoic–Cenozoic of the Laurentian Subbasin of offshore Newfoundland, eastern Canada. Well biostratigraphic events are integrated with reflection seismic in the area to correlate regional seismic stratigraphic surfaces. The four wells are: Bandol-1, Emerillon C-56, East Wolverine G-37, and Heron H-73. We extend the event stratigraphic scheme previously developed for the Scotian Margin, offshore Nova Scotia, into new areas to the east along the southern Grand Banks, where we recognize four new well-log sequence stratigraphic events, and we modify the definition of a previously recognized regional surface. The new and modified regional surfaces are the Early Albian Unconformity, the Late Bathonian Maximum Flooding Surface (MFS), the Late Bajocian MFS (renamed from Bathonian/Bajocian MFS), the ?Bajocian/Toarcian Unconformity, and the Late Pliensbachian MFS. We recognize the "Avalon Unconformity" and "Base-Tertiary Unconformity" of previous studies as amalgamations of multiple smaller-scale unconformities and refine their age in the studied wells. A major improvement over our earlier Scotian Margin event schemes is the extension of the event stratigraphy into the Early Jurassic using a suite of marine biostratigraphic markers. We compare the Early Jurassic event scheme to Deep Sea Drilling Project Site 547B on the conjugate Moroccan Margin to better constrain potential source rock intervals and the early history of the central Atlantic Ocean. Nous utilisons des données biostratigraphiques sur les microfossiles, des données palynologiques et des données sur les nanofossiles, nouvelles et existantes, conjointement avec des diagraphies lithologiques et géophysiques de quatre puits pour définir une série de phénomènes stratigraphiques séquentiels de la tranche du Mésozoïque-Cénozoïque du sous-bassin ... Article in Journal/Newspaper Newfoundland University of New Brunswick: Centre for Digital Scholarship Journals Canada |
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Open Polar |
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University of New Brunswick: Centre for Digital Scholarship Journals |
op_collection_id |
ftuninewbrunojs |
language |
English |
description |
We use new and existing nannofossil, palynological, and microfossil biostratigraphic data in conjunction with lithologic and geophysical logs from four wells to establish a series of sequence-stratigraphic events in the Mesozoic–Cenozoic of the Laurentian Subbasin of offshore Newfoundland, eastern Canada. Well biostratigraphic events are integrated with reflection seismic in the area to correlate regional seismic stratigraphic surfaces. The four wells are: Bandol-1, Emerillon C-56, East Wolverine G-37, and Heron H-73. We extend the event stratigraphic scheme previously developed for the Scotian Margin, offshore Nova Scotia, into new areas to the east along the southern Grand Banks, where we recognize four new well-log sequence stratigraphic events, and we modify the definition of a previously recognized regional surface. The new and modified regional surfaces are the Early Albian Unconformity, the Late Bathonian Maximum Flooding Surface (MFS), the Late Bajocian MFS (renamed from Bathonian/Bajocian MFS), the ?Bajocian/Toarcian Unconformity, and the Late Pliensbachian MFS. We recognize the "Avalon Unconformity" and "Base-Tertiary Unconformity" of previous studies as amalgamations of multiple smaller-scale unconformities and refine their age in the studied wells. A major improvement over our earlier Scotian Margin event schemes is the extension of the event stratigraphy into the Early Jurassic using a suite of marine biostratigraphic markers. We compare the Early Jurassic event scheme to Deep Sea Drilling Project Site 547B on the conjugate Moroccan Margin to better constrain potential source rock intervals and the early history of the central Atlantic Ocean. Nous utilisons des données biostratigraphiques sur les microfossiles, des données palynologiques et des données sur les nanofossiles, nouvelles et existantes, conjointement avec des diagraphies lithologiques et géophysiques de quatre puits pour définir une série de phénomènes stratigraphiques séquentiels de la tranche du Mésozoïque-Cénozoïque du sous-bassin ... |
format |
Article in Journal/Newspaper |
author |
Weston, Janice F. MacRae, R. Andrew Ascoli, Piero Cooper, M. Kevin E. Fensome, Robert A. Shaw, David Williams, Graham L. |
spellingShingle |
Weston, Janice F. MacRae, R. Andrew Ascoli, Piero Cooper, M. Kevin E. Fensome, Robert A. Shaw, David Williams, Graham L. Re-evaluation of the Mesozoic–Cenozoic biostratigraphy of the Laurentian Subbasin of the Scotian Basin, offshore eastern Canada |
author_facet |
Weston, Janice F. MacRae, R. Andrew Ascoli, Piero Cooper, M. Kevin E. Fensome, Robert A. Shaw, David Williams, Graham L. |
author_sort |
Weston, Janice F. |
title |
Re-evaluation of the Mesozoic–Cenozoic biostratigraphy of the Laurentian Subbasin of the Scotian Basin, offshore eastern Canada |
title_short |
Re-evaluation of the Mesozoic–Cenozoic biostratigraphy of the Laurentian Subbasin of the Scotian Basin, offshore eastern Canada |
title_full |
Re-evaluation of the Mesozoic–Cenozoic biostratigraphy of the Laurentian Subbasin of the Scotian Basin, offshore eastern Canada |
title_fullStr |
Re-evaluation of the Mesozoic–Cenozoic biostratigraphy of the Laurentian Subbasin of the Scotian Basin, offshore eastern Canada |
title_full_unstemmed |
Re-evaluation of the Mesozoic–Cenozoic biostratigraphy of the Laurentian Subbasin of the Scotian Basin, offshore eastern Canada |
title_sort |
re-evaluation of the mesozoic–cenozoic biostratigraphy of the laurentian subbasin of the scotian basin, offshore eastern canada |
publisher |
Atlantic Geoscience Society |
publishDate |
2023 |
url |
https://journals.lib.unb.ca/index.php/ag/article/view/33343 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_source |
Atlantic Geoscience; Vol. 59 (2023); 183 - 239 2564-2987 |
op_relation |
https://journals.lib.unb.ca/index.php/ag/article/view/33343/1882529549 https://journals.lib.unb.ca/index.php/ag/article/view/33343/1882529550 https://journals.lib.unb.ca/index.php/ag/article/view/33343/1882529551 https://journals.lib.unb.ca/index.php/ag/article/view/33343/1882529553 https://journals.lib.unb.ca/index.php/ag/article/view/33343/1882529554 https://journals.lib.unb.ca/index.php/ag/article/view/33343/1882529555 https://journals.lib.unb.ca/index.php/ag/article/view/33343 |
op_rights |
Copyright (c) 2023 Atlantic Geoscience |
_version_ |
1788063181255475200 |