Intercalibration of Boreal and Tethyan time scales: the magnetobiostratigraphy of the Middle Triassic and the latest Early Triassic from Spitsbergen, Arctic Norway
An integrated biomagnetostratigraphic study of the latest Early Triassic to the upper parts of the Middle Triassic, at Milne Edwardsfjellet in central Spitsbergen, Svalbard, allows a detailed correlation of Boreal and Tethyan biostratigraphies. The biostratigraphy consists of ammonoid and palynomorp...
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Norwegian Polar Institute
2008
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Online Access: | https://polarresearch.net/index.php/polar/article/view/2901 https://doi.org/10.3402/polar.v27i3.6188 |
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ftjpolarres:oai:journals.openacademia.net:article/2901 2023-05-15T15:13:37+02:00 Intercalibration of Boreal and Tethyan time scales: the magnetobiostratigraphy of the Middle Triassic and the latest Early Triassic from Spitsbergen, Arctic Norway Hounslow, Mark W. Hu, Mengyu Mørk, Atle Weitschat, Wolfgang Os Vigran, Jorunn Karloukovski, Vassil Orchard, Michael J. 2008-12-01 application/pdf https://polarresearch.net/index.php/polar/article/view/2901 https://doi.org/10.3402/polar.v27i3.6188 eng eng Norwegian Polar Institute https://polarresearch.net/index.php/polar/article/view/2901/6528 https://polarresearch.net/index.php/polar/article/view/2901 doi:10.3402/polar.v27i3.6188 Copyright (c) 2018 Polar Research Polar Research; Vol. 27 No. 3 (2008): Special issue: The Boreal Triassic; 469-490 1751-8369 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2008 ftjpolarres https://doi.org/10.3402/polar.v27i3.6188 2021-11-11T19:13:21Z An integrated biomagnetostratigraphic study of the latest Early Triassic to the upper parts of the Middle Triassic, at Milne Edwardsfjellet in central Spitsbergen, Svalbard, allows a detailed correlation of Boreal and Tethyan biostratigraphies. The biostratigraphy consists of ammonoid and palynomorph zonations, supported by conodonts, through some 234 m of succession in two adjacent sections. The magnetostratigraphy consists of 10 substantive normal— reverse polarity chrons, defined by sampling at 150 stratigraphic levels. The magnetization is carried by magnetite and an unidentified magnetic sulphide, and is difficult to fully separate from a strong present-day-like magnetization. The biomagnetostratigraphy from the late Olenekian (Vendomdalen Member) is supplemented by data from nearby Vikinghøgda. The early and middle Anisian has a high sedimentation rate, comprising over half the ca. 140-m thickness of the Botneheia Formation, whereas the late Anisian and lower Ladinian is condensed into about 20 m. The two latest Boreal Ladinian ammonoid zones are absent as a result of erosional truncation below the Tschermakfjellet Formation. Correlation with Tethyan biomagnetostratigraphies shows the traditional base of the Boreal Anisian (base of the Grambergia taimyrensis Zone) precedes the base of the Anisian (using definitions based on the De? sli Caira section in Romania). The Boreal upper Anisian Gymnotoceras rotelliforme and Frechites nevadanus ammonoid zones correlate with most of the Tethyan Pelsonian and Illyrian substages. The base Ladinian defined in the Tethyan global boundary stratotype and point (GSSP) is closely equivalent to the traditional base of the Boreal Ladinian at the Intornites oleshkoi Zone. The latest Olenekian—early Anisian magnetic polarity time scale is refined using the Spitsbergen data. Article in Journal/Newspaper Arctic Polar Research Svalbard Spitsbergen Polar Research (E-Journal) Arctic Svalbard Norway Vikinghøgda ENVELOPE(23.167,23.167,-72.067,-72.067) Botneheia ENVELOPE(16.500,16.500,78.300,78.300) Tschermakfjellet ENVELOPE(15.290,15.290,78.514,78.514) Vendomdalen ENVELOPE(17.321,17.321,78.201,78.201) Milne Edwardsfjellet ENVELOPE(17.833,17.833,78.250,78.250) Polar Research 27 3 |
institution |
Open Polar |
collection |
Polar Research (E-Journal) |
op_collection_id |
ftjpolarres |
language |
English |
description |
An integrated biomagnetostratigraphic study of the latest Early Triassic to the upper parts of the Middle Triassic, at Milne Edwardsfjellet in central Spitsbergen, Svalbard, allows a detailed correlation of Boreal and Tethyan biostratigraphies. The biostratigraphy consists of ammonoid and palynomorph zonations, supported by conodonts, through some 234 m of succession in two adjacent sections. The magnetostratigraphy consists of 10 substantive normal— reverse polarity chrons, defined by sampling at 150 stratigraphic levels. The magnetization is carried by magnetite and an unidentified magnetic sulphide, and is difficult to fully separate from a strong present-day-like magnetization. The biomagnetostratigraphy from the late Olenekian (Vendomdalen Member) is supplemented by data from nearby Vikinghøgda. The early and middle Anisian has a high sedimentation rate, comprising over half the ca. 140-m thickness of the Botneheia Formation, whereas the late Anisian and lower Ladinian is condensed into about 20 m. The two latest Boreal Ladinian ammonoid zones are absent as a result of erosional truncation below the Tschermakfjellet Formation. Correlation with Tethyan biomagnetostratigraphies shows the traditional base of the Boreal Anisian (base of the Grambergia taimyrensis Zone) precedes the base of the Anisian (using definitions based on the De? sli Caira section in Romania). The Boreal upper Anisian Gymnotoceras rotelliforme and Frechites nevadanus ammonoid zones correlate with most of the Tethyan Pelsonian and Illyrian substages. The base Ladinian defined in the Tethyan global boundary stratotype and point (GSSP) is closely equivalent to the traditional base of the Boreal Ladinian at the Intornites oleshkoi Zone. The latest Olenekian—early Anisian magnetic polarity time scale is refined using the Spitsbergen data. |
format |
Article in Journal/Newspaper |
author |
Hounslow, Mark W. Hu, Mengyu Mørk, Atle Weitschat, Wolfgang Os Vigran, Jorunn Karloukovski, Vassil Orchard, Michael J. |
spellingShingle |
Hounslow, Mark W. Hu, Mengyu Mørk, Atle Weitschat, Wolfgang Os Vigran, Jorunn Karloukovski, Vassil Orchard, Michael J. Intercalibration of Boreal and Tethyan time scales: the magnetobiostratigraphy of the Middle Triassic and the latest Early Triassic from Spitsbergen, Arctic Norway |
author_facet |
Hounslow, Mark W. Hu, Mengyu Mørk, Atle Weitschat, Wolfgang Os Vigran, Jorunn Karloukovski, Vassil Orchard, Michael J. |
author_sort |
Hounslow, Mark W. |
title |
Intercalibration of Boreal and Tethyan time scales: the magnetobiostratigraphy of the Middle Triassic and the latest Early Triassic from Spitsbergen, Arctic Norway |
title_short |
Intercalibration of Boreal and Tethyan time scales: the magnetobiostratigraphy of the Middle Triassic and the latest Early Triassic from Spitsbergen, Arctic Norway |
title_full |
Intercalibration of Boreal and Tethyan time scales: the magnetobiostratigraphy of the Middle Triassic and the latest Early Triassic from Spitsbergen, Arctic Norway |
title_fullStr |
Intercalibration of Boreal and Tethyan time scales: the magnetobiostratigraphy of the Middle Triassic and the latest Early Triassic from Spitsbergen, Arctic Norway |
title_full_unstemmed |
Intercalibration of Boreal and Tethyan time scales: the magnetobiostratigraphy of the Middle Triassic and the latest Early Triassic from Spitsbergen, Arctic Norway |
title_sort |
intercalibration of boreal and tethyan time scales: the magnetobiostratigraphy of the middle triassic and the latest early triassic from spitsbergen, arctic norway |
publisher |
Norwegian Polar Institute |
publishDate |
2008 |
url |
https://polarresearch.net/index.php/polar/article/view/2901 https://doi.org/10.3402/polar.v27i3.6188 |
long_lat |
ENVELOPE(23.167,23.167,-72.067,-72.067) ENVELOPE(16.500,16.500,78.300,78.300) ENVELOPE(15.290,15.290,78.514,78.514) ENVELOPE(17.321,17.321,78.201,78.201) ENVELOPE(17.833,17.833,78.250,78.250) |
geographic |
Arctic Svalbard Norway Vikinghøgda Botneheia Tschermakfjellet Vendomdalen Milne Edwardsfjellet |
geographic_facet |
Arctic Svalbard Norway Vikinghøgda Botneheia Tschermakfjellet Vendomdalen Milne Edwardsfjellet |
genre |
Arctic Polar Research Svalbard Spitsbergen |
genre_facet |
Arctic Polar Research Svalbard Spitsbergen |
op_source |
Polar Research; Vol. 27 No. 3 (2008): Special issue: The Boreal Triassic; 469-490 1751-8369 |
op_relation |
https://polarresearch.net/index.php/polar/article/view/2901/6528 https://polarresearch.net/index.php/polar/article/view/2901 doi:10.3402/polar.v27i3.6188 |
op_rights |
Copyright (c) 2018 Polar Research |
op_doi |
https://doi.org/10.3402/polar.v27i3.6188 |
container_title |
Polar Research |
container_volume |
27 |
container_issue |
3 |
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1766344152445878272 |