Geomagnetic polarity and carbon isotopic stratigraphic assessment of the late Carnian -earliest Norian in Svalbard:evidence for a major hiatus and improved Boreal to Tethyan correlation
Combining magnetostratigraphy and organic carbon isotopic changes has allowed a more precise position to be determined for the base of the Norian in Svalbard successions. A magnetostratigraphy is constructed from two sections (Binnedalen, Nørdstefjellet) from the northern end of Hopen Island (southe...
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Language: | English |
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2022
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Online Access: | https://eprints.lancs.ac.uk/id/eprint/168751/ https://eprints.lancs.ac.uk/id/eprint/168751/1/Hounslow_et_al_22_NJG_all.zip https://doi.org/10.17850/njg102-1-4 |
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ftulancaster:oai:eprints.lancs.ac.uk:168751 2023-08-27T04:09:53+02:00 Geomagnetic polarity and carbon isotopic stratigraphic assessment of the late Carnian -earliest Norian in Svalbard:evidence for a major hiatus and improved Boreal to Tethyan correlation Hounslow, Mark W Harris, Samuel Karloukovski, Vassil Mørk, Atle 2022-03-30 archive https://eprints.lancs.ac.uk/id/eprint/168751/ https://eprints.lancs.ac.uk/id/eprint/168751/1/Hounslow_et_al_22_NJG_all.zip https://doi.org/10.17850/njg102-1-4 en eng https://eprints.lancs.ac.uk/id/eprint/168751/1/Hounslow_et_al_22_NJG_all.zip Hounslow, Mark W and Harris, Samuel and Karloukovski, Vassil and Mørk, Atle (2022) Geomagnetic polarity and carbon isotopic stratigraphic assessment of the late Carnian -earliest Norian in Svalbard:evidence for a major hiatus and improved Boreal to Tethyan correlation. Norwegian Journal of Geology, 102. ISSN 0801-4736 creative_commons_attribution_4_0_international_license Journal Article PeerReviewed 2022 ftulancaster https://doi.org/10.17850/njg102-1-4 2023-08-03T22:41:19Z Combining magnetostratigraphy and organic carbon isotopic changes has allowed a more precise position to be determined for the base of the Norian in Svalbard successions. A magnetostratigraphy is constructed from two sections (Binnedalen, Nørdstefjellet) from the northern end of Hopen Island (southern Svalbard archipelago), from the De Geerdalen Formation and the lowest part of the Flatsalen Formation. A magnetostratigraphy is also determined from the upper part of the De Geerdalen Formation on Wilhelmøya (eastern Svalbard). On Hopen a composite magnetostratigraphy tied to the Binnedalen section was constructed using correlation based on detailed photographs and logs of the adjacent cliffs. The palaeomagnetic data shows a strong Brunhes overprint, but mean palaeomagnetic directions pass the reversal test and are consistent with other Triassic virtual geomagnetic palaeopole data from Svalbard. The palaeomagnetic signal is carried by magnetite. Organic carbon isotope data identifies three negative excursions in the Hopen succession— below the Hopen Member, within the upper Hopen Member and at the De Geerdalen –- Flatsalen formation boundary. The carbon isotope variations are correlated to Tuvalian (late Carnian) excursions seen in lower paleolatitude sections. The magnetostratigraphy of the Isfjorden Member from Wilhelmøya and central Spitsbergen are similar, and when integrated with the carbon isotope stratigraphy suggests that the Isfjorden Member is not equivalent to the units of the De Geerdalen Formation exposed on northern Hopen, but is older. These relationships suggest the sequence boundary at the base of the Wilhelmøya Subgroup probably cuts down into mid Tuvalian age strata of the De Geerdalen Formation in Spitsbergen and Wilhelmøya, but only into the latest Tuvalian strata on Hopen. A revised Tuvalian geomagnetic polarity scale is also proposed, linked to the carbon isotope excursions. Article in Journal/Newspaper Hopen Hopen island Isfjord* Isfjord* Isfjorden Isfjorden Svalbard Wilhelmøya Hopen Spitsbergen Lancaster University: Lancaster Eprints De Geerdalen ENVELOPE(16.368,16.368,78.296,78.296) Flatsalen ENVELOPE(25.500,25.500,76.700,76.700) Hopen ENVELOPE(9.279,9.279,63.379,63.379) Nørdstefjellet ENVELOPE(25.433,25.433,76.700,76.700) Svalbard Svalbard Archipelago Wilhelmøya ENVELOPE(20.418,20.418,79.062,79.062) Norwegian Journal of Geology |
institution |
Open Polar |
collection |
Lancaster University: Lancaster Eprints |
op_collection_id |
ftulancaster |
language |
English |
description |
Combining magnetostratigraphy and organic carbon isotopic changes has allowed a more precise position to be determined for the base of the Norian in Svalbard successions. A magnetostratigraphy is constructed from two sections (Binnedalen, Nørdstefjellet) from the northern end of Hopen Island (southern Svalbard archipelago), from the De Geerdalen Formation and the lowest part of the Flatsalen Formation. A magnetostratigraphy is also determined from the upper part of the De Geerdalen Formation on Wilhelmøya (eastern Svalbard). On Hopen a composite magnetostratigraphy tied to the Binnedalen section was constructed using correlation based on detailed photographs and logs of the adjacent cliffs. The palaeomagnetic data shows a strong Brunhes overprint, but mean palaeomagnetic directions pass the reversal test and are consistent with other Triassic virtual geomagnetic palaeopole data from Svalbard. The palaeomagnetic signal is carried by magnetite. Organic carbon isotope data identifies three negative excursions in the Hopen succession— below the Hopen Member, within the upper Hopen Member and at the De Geerdalen –- Flatsalen formation boundary. The carbon isotope variations are correlated to Tuvalian (late Carnian) excursions seen in lower paleolatitude sections. The magnetostratigraphy of the Isfjorden Member from Wilhelmøya and central Spitsbergen are similar, and when integrated with the carbon isotope stratigraphy suggests that the Isfjorden Member is not equivalent to the units of the De Geerdalen Formation exposed on northern Hopen, but is older. These relationships suggest the sequence boundary at the base of the Wilhelmøya Subgroup probably cuts down into mid Tuvalian age strata of the De Geerdalen Formation in Spitsbergen and Wilhelmøya, but only into the latest Tuvalian strata on Hopen. A revised Tuvalian geomagnetic polarity scale is also proposed, linked to the carbon isotope excursions. |
format |
Article in Journal/Newspaper |
author |
Hounslow, Mark W Harris, Samuel Karloukovski, Vassil Mørk, Atle |
spellingShingle |
Hounslow, Mark W Harris, Samuel Karloukovski, Vassil Mørk, Atle Geomagnetic polarity and carbon isotopic stratigraphic assessment of the late Carnian -earliest Norian in Svalbard:evidence for a major hiatus and improved Boreal to Tethyan correlation |
author_facet |
Hounslow, Mark W Harris, Samuel Karloukovski, Vassil Mørk, Atle |
author_sort |
Hounslow, Mark W |
title |
Geomagnetic polarity and carbon isotopic stratigraphic assessment of the late Carnian -earliest Norian in Svalbard:evidence for a major hiatus and improved Boreal to Tethyan correlation |
title_short |
Geomagnetic polarity and carbon isotopic stratigraphic assessment of the late Carnian -earliest Norian in Svalbard:evidence for a major hiatus and improved Boreal to Tethyan correlation |
title_full |
Geomagnetic polarity and carbon isotopic stratigraphic assessment of the late Carnian -earliest Norian in Svalbard:evidence for a major hiatus and improved Boreal to Tethyan correlation |
title_fullStr |
Geomagnetic polarity and carbon isotopic stratigraphic assessment of the late Carnian -earliest Norian in Svalbard:evidence for a major hiatus and improved Boreal to Tethyan correlation |
title_full_unstemmed |
Geomagnetic polarity and carbon isotopic stratigraphic assessment of the late Carnian -earliest Norian in Svalbard:evidence for a major hiatus and improved Boreal to Tethyan correlation |
title_sort |
geomagnetic polarity and carbon isotopic stratigraphic assessment of the late carnian -earliest norian in svalbard:evidence for a major hiatus and improved boreal to tethyan correlation |
publishDate |
2022 |
url |
https://eprints.lancs.ac.uk/id/eprint/168751/ https://eprints.lancs.ac.uk/id/eprint/168751/1/Hounslow_et_al_22_NJG_all.zip https://doi.org/10.17850/njg102-1-4 |
long_lat |
ENVELOPE(16.368,16.368,78.296,78.296) ENVELOPE(25.500,25.500,76.700,76.700) ENVELOPE(9.279,9.279,63.379,63.379) ENVELOPE(25.433,25.433,76.700,76.700) ENVELOPE(20.418,20.418,79.062,79.062) |
geographic |
De Geerdalen Flatsalen Hopen Nørdstefjellet Svalbard Svalbard Archipelago Wilhelmøya |
geographic_facet |
De Geerdalen Flatsalen Hopen Nørdstefjellet Svalbard Svalbard Archipelago Wilhelmøya |
genre |
Hopen Hopen island Isfjord* Isfjord* Isfjorden Isfjorden Svalbard Wilhelmøya Hopen Spitsbergen |
genre_facet |
Hopen Hopen island Isfjord* Isfjord* Isfjorden Isfjorden Svalbard Wilhelmøya Hopen Spitsbergen |
op_relation |
https://eprints.lancs.ac.uk/id/eprint/168751/1/Hounslow_et_al_22_NJG_all.zip Hounslow, Mark W and Harris, Samuel and Karloukovski, Vassil and Mørk, Atle (2022) Geomagnetic polarity and carbon isotopic stratigraphic assessment of the late Carnian -earliest Norian in Svalbard:evidence for a major hiatus and improved Boreal to Tethyan correlation. Norwegian Journal of Geology, 102. ISSN 0801-4736 |
op_rights |
creative_commons_attribution_4_0_international_license |
op_doi |
https://doi.org/10.17850/njg102-1-4 |
container_title |
Norwegian Journal of Geology |
_version_ |
1775351539667304448 |