Combined paleomagnetic, isotopic, and stratigraphic evidence for true polar wander from the Neoproterozoic Akademikerbreen Group, Svalbard, Norway

Adam C. Maloof, Galen P. Halverson, Joseph L. Kirschvink, Daniel P. Schrag, Benjamin P. Weiss, Paul F. Hoffman

Research output: Contribution to journalArticle

97 Citations (Scopus)

Abstract

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 δ13C 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.

Original languageEnglish (US)
Pages (from-to)1099-1124
Number of pages26
JournalBulletin of the Geological Society of America
Volume118
Issue number9-10
DOIs
StatePublished - Sep 1 2006

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tectonic rotation
carbonate sediment
hiatus
paleogeography
plate tectonics
craton
sea level
carbonate
basin
sediment
continent
test

All Science Journal Classification (ASJC) codes

  • Geology

Cite this

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. In: Bulletin of the Geological Society of America. 2006 ; Vol. 118, No. 9-10. pp. 1099-1124.
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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.

In: Bulletin of the Geological Society of America, Vol. 118, No. 9-10, 01.09.2006, p. 1099-1124.

Research output: Contribution to journalArticle

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