Combined paleomagnetic, isotopic, and stratigraphic evidence for true polar wander from the Neoproterozoic Akademikerbreen Group, Svalbard, Norway
We present new paleomagnetic data from three Middle Neoproterozoic carbonate units of East Svalbard, Norway. The paleomagnetic record is gleaned from 50 to 650 m of continuous, platformal carbonate sediment, is reproduced at three locations distributed over >100 km on a single craton, and scores...
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ftcaltechauth:oai:authors.library.caltech.edu:36755 2023-05-15T18:29:42+02:00 Combined paleomagnetic, isotopic, and stratigraphic evidence for true polar wander from the Neoproterozoic Akademikerbreen Group, Svalbard, Norway Maloof, Adam C. Halverson, Galen P. Kirschvink, Joseph L. Schrag, Daniel P. Weiss, Benjamin P. Hoffman, Paul F. 2006-09 https://authors.library.caltech.edu/36755/ https://resolver.caltech.edu/CaltechAUTHORS:20130204-112233889 unknown Geological Society of America Maloof, Adam C. and Halverson, Galen P. and Kirschvink, Joseph L. and Schrag, Daniel P. and Weiss, Benjamin P. and Hoffman, Paul F. (2006) Combined paleomagnetic, isotopic, and stratigraphic evidence for true polar wander from the Neoproterozoic Akademikerbreen Group, Svalbard, Norway. Geological Society of America Bulletin, 118 (9-10). pp. 1099-1124. ISSN 0016-7606. doi:10.1130/B25892.1. https://resolver.caltech.edu/CaltechAUTHORS:20130204-112233889 <https://resolver.caltech.edu/CaltechAUTHORS:20130204-112233889> Article PeerReviewed 2006 ftcaltechauth https://doi.org/10.1130/B25892.1 2021-11-11T18:52:41Z We present new paleomagnetic data from three Middle Neoproterozoic carbonate units of East Svalbard, Norway. The paleomagnetic record is gleaned from 50 to 650 m of continuous, platformal carbonate sediment, is reproduced at three locations distributed over >100 km on a single craton, and scores a 5–6 (out of 7) on the Van der Voo (1990) reliability scale. Two >50° shifts in paleomagnetic direction are coincident with equally abrupt shifts in δ^(13)C and transient changes in relative sea level. We explore four possible explanations for these coincidental changes: rapid plate tectonic rotation during depositional hiatus, magnetic excursions, nongeocentric axial-dipole fields, and true polar wander. We conclude that the observations are explained most readily by rapid shifts in paleogeography associated with a pair of true polar wander events. Future work in sediments of equivalent age from other basins can test directly the true polar wander hypothesis because this type of event would affect every continent in a predictable manner, depending on the continent's changing position relative to Earth's spin axis. Article in Journal/Newspaper Svalbard Caltech Authors (California Institute of Technology) Akademikerbreen ENVELOPE(18.391,18.391,78.718,78.718) Norway Svalbard Geological Society of America Bulletin 118 9-10 1099 1124 |
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Open Polar |
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Caltech Authors (California Institute of Technology) |
op_collection_id |
ftcaltechauth |
language |
unknown |
description |
We present new paleomagnetic data from three Middle Neoproterozoic carbonate units of East Svalbard, Norway. The paleomagnetic record is gleaned from 50 to 650 m of continuous, platformal carbonate sediment, is reproduced at three locations distributed over >100 km on a single craton, and scores a 5–6 (out of 7) on the Van der Voo (1990) reliability scale. Two >50° shifts in paleomagnetic direction are coincident with equally abrupt shifts in δ^(13)C and transient changes in relative sea level. We explore four possible explanations for these coincidental changes: rapid plate tectonic rotation during depositional hiatus, magnetic excursions, nongeocentric axial-dipole fields, and true polar wander. We conclude that the observations are explained most readily by rapid shifts in paleogeography associated with a pair of true polar wander events. Future work in sediments of equivalent age from other basins can test directly the true polar wander hypothesis because this type of event would affect every continent in a predictable manner, depending on the continent's changing position relative to Earth's spin axis. |
format |
Article in Journal/Newspaper |
author |
Maloof, Adam C. Halverson, Galen P. Kirschvink, Joseph L. Schrag, Daniel P. Weiss, Benjamin P. Hoffman, Paul F. |
spellingShingle |
Maloof, Adam C. Halverson, Galen P. Kirschvink, Joseph L. Schrag, Daniel P. Weiss, Benjamin P. Hoffman, Paul F. Combined paleomagnetic, isotopic, and stratigraphic evidence for true polar wander from the Neoproterozoic Akademikerbreen Group, Svalbard, Norway |
author_facet |
Maloof, Adam C. Halverson, Galen P. Kirschvink, Joseph L. Schrag, Daniel P. Weiss, Benjamin P. Hoffman, Paul F. |
author_sort |
Maloof, Adam C. |
title |
Combined paleomagnetic, isotopic, and stratigraphic evidence for true polar wander from the Neoproterozoic Akademikerbreen Group, Svalbard, Norway |
title_short |
Combined paleomagnetic, isotopic, and stratigraphic evidence for true polar wander from the Neoproterozoic Akademikerbreen Group, Svalbard, Norway |
title_full |
Combined paleomagnetic, isotopic, and stratigraphic evidence for true polar wander from the Neoproterozoic Akademikerbreen Group, Svalbard, Norway |
title_fullStr |
Combined paleomagnetic, isotopic, and stratigraphic evidence for true polar wander from the Neoproterozoic Akademikerbreen Group, Svalbard, Norway |
title_full_unstemmed |
Combined paleomagnetic, isotopic, and stratigraphic evidence for true polar wander from the Neoproterozoic Akademikerbreen Group, Svalbard, Norway |
title_sort |
combined paleomagnetic, isotopic, and stratigraphic evidence for true polar wander from the neoproterozoic akademikerbreen group, svalbard, norway |
publisher |
Geological Society of America |
publishDate |
2006 |
url |
https://authors.library.caltech.edu/36755/ https://resolver.caltech.edu/CaltechAUTHORS:20130204-112233889 |
long_lat |
ENVELOPE(18.391,18.391,78.718,78.718) |
geographic |
Akademikerbreen Norway Svalbard |
geographic_facet |
Akademikerbreen Norway Svalbard |
genre |
Svalbard |
genre_facet |
Svalbard |
op_relation |
Maloof, Adam C. and Halverson, Galen P. and Kirschvink, Joseph L. and Schrag, Daniel P. and Weiss, Benjamin P. and Hoffman, Paul F. (2006) Combined paleomagnetic, isotopic, and stratigraphic evidence for true polar wander from the Neoproterozoic Akademikerbreen Group, Svalbard, Norway. Geological Society of America Bulletin, 118 (9-10). pp. 1099-1124. ISSN 0016-7606. doi:10.1130/B25892.1. https://resolver.caltech.edu/CaltechAUTHORS:20130204-112233889 <https://resolver.caltech.edu/CaltechAUTHORS:20130204-112233889> |
op_doi |
https://doi.org/10.1130/B25892.1 |
container_title |
Geological Society of America Bulletin |
container_volume |
118 |
container_issue |
9-10 |
container_start_page |
1099 |
op_container_end_page |
1124 |
_version_ |
1766212991559139328 |