Self-subduction of the Pangaean global plate



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Gutiérrez Alonso, Gabriel and Fernández Suárez, Javier and Weil, Arlo B. and Murphy, J. Brendam and Nance, R. Damian and Corfu, Fernando and Johnston, Stephen T. (2008) Self-subduction of the Pangaean global plate. Nature Geoscience, 1 . pp. 549-553. ISSN 1752-0894

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One of the most striking and rare occurrences in the Earth's history is the amalgamation of most of the continental lithosphere into one supercontinent. The most recent supercontinent, Pangaea, lasted from 320 to 200 million years ago. Here, we show that after the continental collisions that led to the formation of Pangaea, plate convergence continued in a large, wedge-shaped oceanic tract. We súggest that plate strain at the periphery of the supercontinent eventually resulted in self-subduction of the Pangaean global plate, when the ocean margin of the continent subducted beneath the continental edge at the other end of the same plate. Our scenario results in a stress regime within Pangaea that explains the development of a large fold structure near the apex of the Palaeotethys Ocean, extensive lower crustal heating and continental magmatism at the core of the continent as well as the development of radially arranged continental rifts in more peripheral regions of the plate.

Item Type:Article
Uncontrolled Keywords:Pangaean; Tectónica
Subjects:Sciences > Geology > Geodynamics
ID Code:58673
Deposited On:23 Jan 2020 12:16
Last Modified:23 Jan 2020 12:16

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