Evolution of Pangea: paleomagnetic constraints from the Southern Alps, Italy

Evolution of Pangea: paleomagnetic constraints from the Southern Alps, Italy A new early Late Triassic paleopole for Adria has been obtained from the Val Sabbia Sandstone in the Southern Alps. As Early Permian and Jurassic-Cretaceous paleomagnetic data from para-autochthonous regions of Adria such as the Southern Alps are consistent with ‘African’ APWPs(1–2), paleomagnetic data from this region can be used to bolster the West Gondwana APWP in the poorly known Late Permian-Triassic time interval. The Southern Alpine paleopoles are integrated with the West Gondwana and Laurussia APWPs of Van der Voo (1) and used to generate a tectonic model for the evolution of Pangea. The Early Permian overall mean paleopole for West Gondwana and Adria, in conjunction with the coeval Laurussia paleopole, support Pangea B of Morel and Irving (3). The Late Permian/Early Triassic and the Middle/Late Triassic paleopoles from Adria and Laurussia support Pangea A-2 of Van der Voo and French (4). The phase of transcurrent motion between Laurasia and Gondwana(5) that caused the Pangea B to A-2 transition occurred essentially in the Permian (at the end of Variscan orogeny) with an average relative velocity of approximately 10 cm/yr. Finally, the Late Triassic/Early Jurassic paleopoles from West Gondwana and Laurussia agree with Pangea A-1 of Bullard et al. (6), the widely accepted Pangea configuration at the time of the Jurassic breakup. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Earth and Planetary Science Letters Elsevier

Evolution of Pangea: paleomagnetic constraints from the Southern Alps, Italy

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Publisher
Elsevier
Copyright
Copyright © 1996 Elsevier Science B.V. All rights reserved.
ISSN
0012-821X
eISSN
1385-013X
DOI
10.1016/0012-821X(96)00038-6
Publisher site
See Article on Publisher Site

Abstract

A new early Late Triassic paleopole for Adria has been obtained from the Val Sabbia Sandstone in the Southern Alps. As Early Permian and Jurassic-Cretaceous paleomagnetic data from para-autochthonous regions of Adria such as the Southern Alps are consistent with ‘African’ APWPs(1–2), paleomagnetic data from this region can be used to bolster the West Gondwana APWP in the poorly known Late Permian-Triassic time interval. The Southern Alpine paleopoles are integrated with the West Gondwana and Laurussia APWPs of Van der Voo (1) and used to generate a tectonic model for the evolution of Pangea. The Early Permian overall mean paleopole for West Gondwana and Adria, in conjunction with the coeval Laurussia paleopole, support Pangea B of Morel and Irving (3). The Late Permian/Early Triassic and the Middle/Late Triassic paleopoles from Adria and Laurussia support Pangea A-2 of Van der Voo and French (4). The phase of transcurrent motion between Laurasia and Gondwana(5) that caused the Pangea B to A-2 transition occurred essentially in the Permian (at the end of Variscan orogeny) with an average relative velocity of approximately 10 cm/yr. Finally, the Late Triassic/Early Jurassic paleopoles from West Gondwana and Laurussia agree with Pangea A-1 of Bullard et al. (6), the widely accepted Pangea configuration at the time of the Jurassic breakup.

Journal

Earth and Planetary Science LettersElsevier

Published: May 1, 1996

References

  • Phanerozoic paleomagnetic poles from Europe and North America and comparisons with continental reconstructions
    Van der Voo, R.
  • Jurassic and Cretaceous paleomagnetic data from the Southern Alps (Italy)
    Channell, J.E.T.; Doglioni, C.; Stoner, J.S.
  • Alleghenian reconstruction and subsequent evolution of the Gulf of Mexico, Bahamas, and Proto-Caribbean
    Pindell, J.L.
  • Early Triassic paleomagnetic data from the Dolomites (Italy)
    Channell, J.E.T.; Doglioni, C.

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