Late Maastrichtian Paleocene chronostratigraphy from Seymour Island, James Ross Basin, Antarctic Peninsula: Eustatic controls on sedimentation
The Paleocene (66–56 Ma) was a critical time interval for understanding the geological history in high palaeolatitudes after the end of Cretaceous event (recovery from mass extinction, palaeoclimate, global sea level changes, among others). The sedimentary succession from Seymour Island (Antarctic P...
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Polar Research Institute of China - PRIC
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ftarcticportal:oai:generic.eprints.org:2699 2023-12-10T09:39:00+01:00 Late Maastrichtian Paleocene chronostratigraphy from Seymour Island, James Ross Basin, Antarctic Peninsula: Eustatic controls on sedimentation Montes, Manuel Beamud, Elisabet Nozal, Francisco Santillana, Sergio 2019-09 application/pdf http://library.arcticportal.org/2699/ http://library.arcticportal.org/2699/1/A1903009.pdf en eng Polar Research Institute of China - PRIC http://library.arcticportal.org/2699/1/A1903009.pdf Montes, Manuel and Beamud, Elisabet and Nozal, Francisco and Santillana, Sergio (2019) Late Maastrichtian Paleocene chronostratigraphy from Seymour Island, James Ross Basin, Antarctic Peninsula: Eustatic controls on sedimentation. Advances in Polar Science, 30 (3). pp. 303-327. Terrestrial Article PeerReviewed 2019 ftarcticportal 2023-11-15T23:54:41Z The Paleocene (66–56 Ma) was a critical time interval for understanding the geological history in high palaeolatitudes after the end of Cretaceous event (recovery from mass extinction, palaeoclimate, global sea level changes, among others). The sedimentary succession from Seymour Island (Antarctic Peninsula) provides key reference material from this important phase of the early Cenozoic. A detailed age model is proposed for the López de Bertodano Formation (LBF), Sobral Formation (SF) and Cross Valley–Wiman Formation (CVWF) based on a new magnetostratigraphic section which integrates previous dinoflagellate cyst biostratigraphy, Iridium anomaly (K-Pg boundary), U-Pb zircon dating (airfall tuff) and strontium isotope values from macrofossils. The new composite magnetostratigraphic section, which includes the Cretaceous–Paleogene boundary, has been correlated to the GPTS from C29r up to C24r. The top of the LBF is confirmed as latest Maastrichtian to earliest Danian (~65.4 Ma) in age. The overlying SF is mostly Danian in age (~65.2– ~63 Ma) and CVWF is Selandian–Thatenian (~61.3–56.9 Ma). LBF, SF and CVWF are unconformity-bounded units (alloformations) that record the geological evolution of the James Ross Basin during a period of relative decreasing tectonism but coeval with volcanic activity. Unconformity based internal units have been recognized, dividing each formation into allomembers (LBF: Molluscan and Cenozoic; SF: A, B and C; CVWF: Díaz, Arañado, Bahía Pingüino). The new age model allows correlation of base-level changes with eustatic sea-level fluctuations. The bases of the SF and CVWF are correlated with the 65.3 and 61.5 Ma sea level lowstands. Article in Journal/Newspaper Advances in Polar Science Antarc* Antarctic Antarctic Peninsula Polar Science Polar Science Seymour Island Arctic Portal Library Antarctic Antarctic Peninsula Seymour ENVELOPE(-56.767,-56.767,-64.283,-64.283) Seymour Island ENVELOPE(-56.750,-56.750,-64.283,-64.283) Pingüino ENVELOPE(-56.650,-56.650,-64.266,-64.266) Sobral ENVELOPE(-40.650,-40.650,-81.083,-81.083) Cross Valley ENVELOPE(-56.683,-56.683,-64.258,-64.258) Bahía Pingüino ENVELOPE(-36.233,-36.233,-54.333,-54.333) |
institution |
Open Polar |
collection |
Arctic Portal Library |
op_collection_id |
ftarcticportal |
language |
English |
topic |
Terrestrial |
spellingShingle |
Terrestrial Montes, Manuel Beamud, Elisabet Nozal, Francisco Santillana, Sergio Late Maastrichtian Paleocene chronostratigraphy from Seymour Island, James Ross Basin, Antarctic Peninsula: Eustatic controls on sedimentation |
topic_facet |
Terrestrial |
description |
The Paleocene (66–56 Ma) was a critical time interval for understanding the geological history in high palaeolatitudes after the end of Cretaceous event (recovery from mass extinction, palaeoclimate, global sea level changes, among others). The sedimentary succession from Seymour Island (Antarctic Peninsula) provides key reference material from this important phase of the early Cenozoic. A detailed age model is proposed for the López de Bertodano Formation (LBF), Sobral Formation (SF) and Cross Valley–Wiman Formation (CVWF) based on a new magnetostratigraphic section which integrates previous dinoflagellate cyst biostratigraphy, Iridium anomaly (K-Pg boundary), U-Pb zircon dating (airfall tuff) and strontium isotope values from macrofossils. The new composite magnetostratigraphic section, which includes the Cretaceous–Paleogene boundary, has been correlated to the GPTS from C29r up to C24r. The top of the LBF is confirmed as latest Maastrichtian to earliest Danian (~65.4 Ma) in age. The overlying SF is mostly Danian in age (~65.2– ~63 Ma) and CVWF is Selandian–Thatenian (~61.3–56.9 Ma). LBF, SF and CVWF are unconformity-bounded units (alloformations) that record the geological evolution of the James Ross Basin during a period of relative decreasing tectonism but coeval with volcanic activity. Unconformity based internal units have been recognized, dividing each formation into allomembers (LBF: Molluscan and Cenozoic; SF: A, B and C; CVWF: Díaz, Arañado, Bahía Pingüino). The new age model allows correlation of base-level changes with eustatic sea-level fluctuations. The bases of the SF and CVWF are correlated with the 65.3 and 61.5 Ma sea level lowstands. |
format |
Article in Journal/Newspaper |
author |
Montes, Manuel Beamud, Elisabet Nozal, Francisco Santillana, Sergio |
author_facet |
Montes, Manuel Beamud, Elisabet Nozal, Francisco Santillana, Sergio |
author_sort |
Montes, Manuel |
title |
Late Maastrichtian Paleocene chronostratigraphy from Seymour Island, James Ross Basin, Antarctic Peninsula: Eustatic controls on sedimentation |
title_short |
Late Maastrichtian Paleocene chronostratigraphy from Seymour Island, James Ross Basin, Antarctic Peninsula: Eustatic controls on sedimentation |
title_full |
Late Maastrichtian Paleocene chronostratigraphy from Seymour Island, James Ross Basin, Antarctic Peninsula: Eustatic controls on sedimentation |
title_fullStr |
Late Maastrichtian Paleocene chronostratigraphy from Seymour Island, James Ross Basin, Antarctic Peninsula: Eustatic controls on sedimentation |
title_full_unstemmed |
Late Maastrichtian Paleocene chronostratigraphy from Seymour Island, James Ross Basin, Antarctic Peninsula: Eustatic controls on sedimentation |
title_sort |
late maastrichtian paleocene chronostratigraphy from seymour island, james ross basin, antarctic peninsula: eustatic controls on sedimentation |
publisher |
Polar Research Institute of China - PRIC |
publishDate |
2019 |
url |
http://library.arcticportal.org/2699/ http://library.arcticportal.org/2699/1/A1903009.pdf |
long_lat |
ENVELOPE(-56.767,-56.767,-64.283,-64.283) ENVELOPE(-56.750,-56.750,-64.283,-64.283) ENVELOPE(-56.650,-56.650,-64.266,-64.266) ENVELOPE(-40.650,-40.650,-81.083,-81.083) ENVELOPE(-56.683,-56.683,-64.258,-64.258) ENVELOPE(-36.233,-36.233,-54.333,-54.333) |
geographic |
Antarctic Antarctic Peninsula Seymour Seymour Island Pingüino Sobral Cross Valley Bahía Pingüino |
geographic_facet |
Antarctic Antarctic Peninsula Seymour Seymour Island Pingüino Sobral Cross Valley Bahía Pingüino |
genre |
Advances in Polar Science Antarc* Antarctic Antarctic Peninsula Polar Science Polar Science Seymour Island |
genre_facet |
Advances in Polar Science Antarc* Antarctic Antarctic Peninsula Polar Science Polar Science Seymour Island |
op_relation |
http://library.arcticportal.org/2699/1/A1903009.pdf Montes, Manuel and Beamud, Elisabet and Nozal, Francisco and Santillana, Sergio (2019) Late Maastrichtian Paleocene chronostratigraphy from Seymour Island, James Ross Basin, Antarctic Peninsula: Eustatic controls on sedimentation. Advances in Polar Science, 30 (3). pp. 303-327. |
_version_ |
1784892967850344448 |