Magneto-biostratigraphy of the Middle to Upper Triassic transition, central Spitsbergen, arctic Norway
Abstract: Palaeomagnetic and biostratigraphic data were obtained for the latest Ladinian and most of the Carnian (Botneheia Formation to basal Kapp Toscana Group), from two sections in central Spitsbergen (Svalbard archipelago). Thermal and alternating field (AF) demagnetization reveals a magnetizat...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.548.5126 2023-05-15T15:07:04+02:00 Magneto-biostratigraphy of the Middle to Upper Triassic transition, central Spitsbergen, arctic Norway Mark W. Hounslow Mengyu Hu Atle Mørk Jorunn Os Vigran Wolfgang Weitschat Michael J. Orchard The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.548.5126 http://geog.lancs.ac.uk/cemp/publications/07hounslow-etal.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.548.5126 http://geog.lancs.ac.uk/cemp/publications/07hounslow-etal.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://geog.lancs.ac.uk/cemp/publications/07hounslow-etal.pdf text ftciteseerx 2016-01-08T11:24:15Z Abstract: Palaeomagnetic and biostratigraphic data were obtained for the latest Ladinian and most of the Carnian (Botneheia Formation to basal Kapp Toscana Group), from two sections in central Spitsbergen (Svalbard archipelago). Thermal and alternating field (AF) demagnetization reveals a magnetization of both normal and reversed polarities. The mean directions pass reversal and fold tests and are similar to other European Late Triassic palaeopoles. One of the sections displays 158 of vertical-axis, clockwise, tectonic rotation on a décollement in the underlying Botneheia Formation. The magnetostratigraphy is dominated by normal polarity in the uppermost Botneheia Formation and into the Tschermakfjellet and basal De Geerdalen formations. A substantial hiatus characterizes the Ladinian–Carnian boundary in central Spitsbergen, so reverse magnetozones, identified in Tethyan sections near this boundary, are absent. Magnetostratigraphic correlation, along with palynostratigraphic constraints, indicates that most of the De Geerdalen Formation is Lower Carnian. The magnetostratigraphy and palynology indicates that the Isfjorden Member (upper unit of the De Geerdalen Formation) is probably mid-Carnian in age. Change in the lithological architecture in the Isfjorden Member, compared with the underlying parts of the De Geerdalen Fm, suggests a hiatus near the base of the member, which may represent a mid-Carnian unconformity, not previously recognized on Spitsbergen. Text Arctic Isfjord* Isfjord* Isfjorden Isfjorden Svalbard Spitsbergen Unknown Arctic Botneheia ENVELOPE(16.500,16.500,78.300,78.300) De Geerdalen ENVELOPE(16.368,16.368,78.296,78.296) Kapp Toscana ENVELOPE(15.075,15.075,77.553,77.553) Norway Svalbard Svalbard Archipelago Tschermakfjellet ENVELOPE(15.290,15.290,78.514,78.514) |
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Open Polar |
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Unknown |
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ftciteseerx |
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English |
description |
Abstract: Palaeomagnetic and biostratigraphic data were obtained for the latest Ladinian and most of the Carnian (Botneheia Formation to basal Kapp Toscana Group), from two sections in central Spitsbergen (Svalbard archipelago). Thermal and alternating field (AF) demagnetization reveals a magnetization of both normal and reversed polarities. The mean directions pass reversal and fold tests and are similar to other European Late Triassic palaeopoles. One of the sections displays 158 of vertical-axis, clockwise, tectonic rotation on a décollement in the underlying Botneheia Formation. The magnetostratigraphy is dominated by normal polarity in the uppermost Botneheia Formation and into the Tschermakfjellet and basal De Geerdalen formations. A substantial hiatus characterizes the Ladinian–Carnian boundary in central Spitsbergen, so reverse magnetozones, identified in Tethyan sections near this boundary, are absent. Magnetostratigraphic correlation, along with palynostratigraphic constraints, indicates that most of the De Geerdalen Formation is Lower Carnian. The magnetostratigraphy and palynology indicates that the Isfjorden Member (upper unit of the De Geerdalen Formation) is probably mid-Carnian in age. Change in the lithological architecture in the Isfjorden Member, compared with the underlying parts of the De Geerdalen Fm, suggests a hiatus near the base of the member, which may represent a mid-Carnian unconformity, not previously recognized on Spitsbergen. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Mark W. Hounslow Mengyu Hu Atle Mørk Jorunn Os Vigran Wolfgang Weitschat Michael J. Orchard |
spellingShingle |
Mark W. Hounslow Mengyu Hu Atle Mørk Jorunn Os Vigran Wolfgang Weitschat Michael J. Orchard Magneto-biostratigraphy of the Middle to Upper Triassic transition, central Spitsbergen, arctic Norway |
author_facet |
Mark W. Hounslow Mengyu Hu Atle Mørk Jorunn Os Vigran Wolfgang Weitschat Michael J. Orchard |
author_sort |
Mark W. Hounslow |
title |
Magneto-biostratigraphy of the Middle to Upper Triassic transition, central Spitsbergen, arctic Norway |
title_short |
Magneto-biostratigraphy of the Middle to Upper Triassic transition, central Spitsbergen, arctic Norway |
title_full |
Magneto-biostratigraphy of the Middle to Upper Triassic transition, central Spitsbergen, arctic Norway |
title_fullStr |
Magneto-biostratigraphy of the Middle to Upper Triassic transition, central Spitsbergen, arctic Norway |
title_full_unstemmed |
Magneto-biostratigraphy of the Middle to Upper Triassic transition, central Spitsbergen, arctic Norway |
title_sort |
magneto-biostratigraphy of the middle to upper triassic transition, central spitsbergen, arctic norway |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.548.5126 http://geog.lancs.ac.uk/cemp/publications/07hounslow-etal.pdf |
long_lat |
ENVELOPE(16.500,16.500,78.300,78.300) ENVELOPE(16.368,16.368,78.296,78.296) ENVELOPE(15.075,15.075,77.553,77.553) ENVELOPE(15.290,15.290,78.514,78.514) |
geographic |
Arctic Botneheia De Geerdalen Kapp Toscana Norway Svalbard Svalbard Archipelago Tschermakfjellet |
geographic_facet |
Arctic Botneheia De Geerdalen Kapp Toscana Norway Svalbard Svalbard Archipelago Tschermakfjellet |
genre |
Arctic Isfjord* Isfjord* Isfjorden Isfjorden Svalbard Spitsbergen |
genre_facet |
Arctic Isfjord* Isfjord* Isfjorden Isfjorden Svalbard Spitsbergen |
op_source |
http://geog.lancs.ac.uk/cemp/publications/07hounslow-etal.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.548.5126 http://geog.lancs.ac.uk/cemp/publications/07hounslow-etal.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766338631840038912 |