Strontium isotope correlation of the basal Maastrichtian Stage in Antarctica to the European and US biostratigraphic schemes
New 87Sr/86Sr dating allows the correlation of a marker horizon within the prolific Late Cretaceous Gunnarites antarcticus faunal assemblage of the Cape Lamb Member, Snow Hill Island Formation, Vega Island, Antarctica with reference sections in Europe and the USA. This horizon is between 81.5 and 96...
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Geological Society of London
1999
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Online Access: | http://nora.nerc.ac.uk/id/eprint/503135/ https://doi.org/10.1144/gsjgs.156.5.0957 |
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ftnerc:oai:nora.nerc.ac.uk:503135 2023-05-15T13:48:07+02:00 Strontium isotope correlation of the basal Maastrichtian Stage in Antarctica to the European and US biostratigraphic schemes Crame, J. A. McArthur, J. M. Pirrie, D. Riding, J. B. 1999 http://nora.nerc.ac.uk/id/eprint/503135/ https://doi.org/10.1144/gsjgs.156.5.0957 unknown Geological Society of London Crame, J. A. orcid:0000-0002-5027-9965 McArthur, J. M.; Pirrie, D.; Riding, J. B. 1999 Strontium isotope correlation of the basal Maastrichtian Stage in Antarctica to the European and US biostratigraphic schemes. Journal of the Geological Society, 156 (5). 957-964. https://doi.org/10.1144/gsjgs.156.5.0957 <https://doi.org/10.1144/gsjgs.156.5.0957> Publication - Article PeerReviewed 1999 ftnerc https://doi.org/10.1144/gsjgs.156.5.0957 2023-02-04T19:37:42Z New 87Sr/86Sr dating allows the correlation of a marker horizon within the prolific Late Cretaceous Gunnarites antarcticus faunal assemblage of the Cape Lamb Member, Snow Hill Island Formation, Vega Island, Antarctica with reference sections in Europe and the USA. This horizon is between 81.5 and 96.5 m above the base of the G antarcticus assemblage. Replicate analysis of six macrofossils from within it yielded a mean value for 87Sr/86Sr of 0.707 735 9 ± 0.000 004 3 (± 2 s.e., n=17). This ratio in turn yields a numerical age of 71.0 ± 0.2 Ma when compared to the standard 87Sr/s6Sr reference curve for the latest Cretaceous, for which the Campanian-Maastrichtian boundary is placed at 71.3 ± 0.5 Ma. The value of 0.707 735 9 ± 0.000 004 3 correlates to a level in the Belemnella lanceolata belemnite Zone of the Chalk of northwestern Germany that is 2.5 ± 5 m beneath the base of the overlying B. pseudobtusa Zone (and 7.5 m above the Campanian-Maastrichtian belemnite boundary), and to an interval within the ammonite zonation of the US Western Interior that spans the early Maastrichtian Baculites baculus and B. eliasi zones, but with a most likely level within the B. eliasi Zone. An earliest Maastrichtian age is thereby determined for the Antarctic horizon, and indeed for the entire G. antarcticus assemblage. Gunnarites, sensu lato, is an important ammonite marker for the base of the Maastrichtian throughout the southern high-latitude regions, and the associated large heteromorph ammonite Diplomoceras may comprise a macrofossil link back to the Maastrichtian type sections. Article in Journal/Newspaper Antarc* Antarctic Antarctica antarcticus Snow Hill Island Vega Island Natural Environment Research Council: NERC Open Research Archive Antarctic The Antarctic Vega Island ENVELOPE(-57.500,-57.500,-63.833,-63.833) Hill Island ENVELOPE(76.070,76.070,-69.395,-69.395) Snow Hill Island ENVELOPE(-57.183,-57.183,-64.466,-64.466) Cape Lamb ENVELOPE(-57.621,-57.621,-63.909,-63.909) Snow Hill ENVELOPE(-57.183,-57.183,-64.466,-64.466) Journal of the Geological Society 156 5 957 964 |
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Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
description |
New 87Sr/86Sr dating allows the correlation of a marker horizon within the prolific Late Cretaceous Gunnarites antarcticus faunal assemblage of the Cape Lamb Member, Snow Hill Island Formation, Vega Island, Antarctica with reference sections in Europe and the USA. This horizon is between 81.5 and 96.5 m above the base of the G antarcticus assemblage. Replicate analysis of six macrofossils from within it yielded a mean value for 87Sr/86Sr of 0.707 735 9 ± 0.000 004 3 (± 2 s.e., n=17). This ratio in turn yields a numerical age of 71.0 ± 0.2 Ma when compared to the standard 87Sr/s6Sr reference curve for the latest Cretaceous, for which the Campanian-Maastrichtian boundary is placed at 71.3 ± 0.5 Ma. The value of 0.707 735 9 ± 0.000 004 3 correlates to a level in the Belemnella lanceolata belemnite Zone of the Chalk of northwestern Germany that is 2.5 ± 5 m beneath the base of the overlying B. pseudobtusa Zone (and 7.5 m above the Campanian-Maastrichtian belemnite boundary), and to an interval within the ammonite zonation of the US Western Interior that spans the early Maastrichtian Baculites baculus and B. eliasi zones, but with a most likely level within the B. eliasi Zone. An earliest Maastrichtian age is thereby determined for the Antarctic horizon, and indeed for the entire G. antarcticus assemblage. Gunnarites, sensu lato, is an important ammonite marker for the base of the Maastrichtian throughout the southern high-latitude regions, and the associated large heteromorph ammonite Diplomoceras may comprise a macrofossil link back to the Maastrichtian type sections. |
format |
Article in Journal/Newspaper |
author |
Crame, J. A. McArthur, J. M. Pirrie, D. Riding, J. B. |
spellingShingle |
Crame, J. A. McArthur, J. M. Pirrie, D. Riding, J. B. Strontium isotope correlation of the basal Maastrichtian Stage in Antarctica to the European and US biostratigraphic schemes |
author_facet |
Crame, J. A. McArthur, J. M. Pirrie, D. Riding, J. B. |
author_sort |
Crame, J. A. |
title |
Strontium isotope correlation of the basal Maastrichtian Stage in Antarctica to the European and US biostratigraphic schemes |
title_short |
Strontium isotope correlation of the basal Maastrichtian Stage in Antarctica to the European and US biostratigraphic schemes |
title_full |
Strontium isotope correlation of the basal Maastrichtian Stage in Antarctica to the European and US biostratigraphic schemes |
title_fullStr |
Strontium isotope correlation of the basal Maastrichtian Stage in Antarctica to the European and US biostratigraphic schemes |
title_full_unstemmed |
Strontium isotope correlation of the basal Maastrichtian Stage in Antarctica to the European and US biostratigraphic schemes |
title_sort |
strontium isotope correlation of the basal maastrichtian stage in antarctica to the european and us biostratigraphic schemes |
publisher |
Geological Society of London |
publishDate |
1999 |
url |
http://nora.nerc.ac.uk/id/eprint/503135/ https://doi.org/10.1144/gsjgs.156.5.0957 |
long_lat |
ENVELOPE(-57.500,-57.500,-63.833,-63.833) ENVELOPE(76.070,76.070,-69.395,-69.395) ENVELOPE(-57.183,-57.183,-64.466,-64.466) ENVELOPE(-57.621,-57.621,-63.909,-63.909) ENVELOPE(-57.183,-57.183,-64.466,-64.466) |
geographic |
Antarctic The Antarctic Vega Island Hill Island Snow Hill Island Cape Lamb Snow Hill |
geographic_facet |
Antarctic The Antarctic Vega Island Hill Island Snow Hill Island Cape Lamb Snow Hill |
genre |
Antarc* Antarctic Antarctica antarcticus Snow Hill Island Vega Island |
genre_facet |
Antarc* Antarctic Antarctica antarcticus Snow Hill Island Vega Island |
op_relation |
Crame, J. A. orcid:0000-0002-5027-9965 McArthur, J. M.; Pirrie, D.; Riding, J. B. 1999 Strontium isotope correlation of the basal Maastrichtian Stage in Antarctica to the European and US biostratigraphic schemes. Journal of the Geological Society, 156 (5). 957-964. https://doi.org/10.1144/gsjgs.156.5.0957 <https://doi.org/10.1144/gsjgs.156.5.0957> |
op_doi |
https://doi.org/10.1144/gsjgs.156.5.0957 |
container_title |
Journal of the Geological Society |
container_volume |
156 |
container_issue |
5 |
container_start_page |
957 |
op_container_end_page |
964 |
_version_ |
1766248679616806912 |