Paleotethys slab pull, self-lubricated weak lithospheric zones, poloidal and toroidal plate motions, and Gondwana tectonics

The Gondwana megacontinent was composed of different domains separated by self-lubricated weak lithospheric zones, two of which could have extended into Laurasia. Displacement vectors determined through three consecutive paleomagnetism-constrained paleogeographic reconstructions (Early Pennsylvanian...

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Autores principales: Vizán, Haroldo, Prezzi, Claudia Beatriz, Geuna, Silvana Evangelina, Japas, María Silvia, Renda, Emiliano Manuel, Franzese, Juan Rafael, Van Zele, María Andrea
Formato: Articulo
Lenguaje:Inglés
Publicado: 2017
Materias:
Geología
Gondwana
Permian
Volcanic rocks
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/87150
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SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-87150
record_format dspace
spelling I19-R120-10915-871502023-04-21T18:33:38Z http://sedici.unlp.edu.ar/handle/10915/87150 issn:1553-040X Paleotethys slab pull, self-lubricated weak lithospheric zones, poloidal and toroidal plate motions, and Gondwana tectonics Vizán, Haroldo Prezzi, Claudia Beatriz Geuna, Silvana Evangelina Japas, María Silvia Renda, Emiliano Manuel Franzese, Juan Rafael Van Zele, María Andrea 2017 2019-12-10T16:00:45Z en Geología Gondwana Permian Volcanic rocks The Gondwana megacontinent was composed of different domains separated by self-lubricated weak lithospheric zones, two of which could have extended into Laurasia. Displacement vectors determined through three consecutive paleomagnetism-constrained paleogeographic reconstructions (Early Pennsylvanian-early Guadalupian, ca. 320-270 Ma; late Guadalupian-Middle Triassic, ca. 260-240 Ma; and Late Triassic-early Late Jurassic, ca. 230-160 Ma) show similar orientations to coeval tectonic stresses along Gondwana. Triggered by slab pull at the northern subduction margin of the Paleotethys Ocean, differential displacements between the Gondwana domains caused localized deformation along their borders, reactivating old weak lithospheric zones (e.g., Ventana fold belt south of Buenos Aries province, Argentina; basins such as Cuvette in central Africa; and Neuquén on the Pacific margin of Gondwana). We propose that the wide extent of these structures was possible due to the transmission of mantle toroidal flow induced by strike-slip movements along these focused self-lubricated weak lithospheric zones, along with the northward drift of Pangea. These processes occurred simultaneously with a major mantle reorganization from a huge cold downwelling to a hot upwelling event caused by thermal energy storage beneath Pangea. Centro de Investigaciones Geológicas Articulo Articulo http://creativecommons.org/licenses/by-nc/4.0/ Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) application/pdf 1541-1554
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Geología
Gondwana
Permian
Volcanic rocks
spellingShingle Geología
Gondwana
Permian
Volcanic rocks
Vizán, Haroldo
Prezzi, Claudia Beatriz
Geuna, Silvana Evangelina
Japas, María Silvia
Renda, Emiliano Manuel
Franzese, Juan Rafael
Van Zele, María Andrea
Paleotethys slab pull, self-lubricated weak lithospheric zones, poloidal and toroidal plate motions, and Gondwana tectonics
topic_facet Geología
Gondwana
Permian
Volcanic rocks
description The Gondwana megacontinent was composed of different domains separated by self-lubricated weak lithospheric zones, two of which could have extended into Laurasia. Displacement vectors determined through three consecutive paleomagnetism-constrained paleogeographic reconstructions (Early Pennsylvanian-early Guadalupian, ca. 320-270 Ma; late Guadalupian-Middle Triassic, ca. 260-240 Ma; and Late Triassic-early Late Jurassic, ca. 230-160 Ma) show similar orientations to coeval tectonic stresses along Gondwana. Triggered by slab pull at the northern subduction margin of the Paleotethys Ocean, differential displacements between the Gondwana domains caused localized deformation along their borders, reactivating old weak lithospheric zones (e.g., Ventana fold belt south of Buenos Aries province, Argentina; basins such as Cuvette in central Africa; and Neuquén on the Pacific margin of Gondwana). We propose that the wide extent of these structures was possible due to the transmission of mantle toroidal flow induced by strike-slip movements along these focused self-lubricated weak lithospheric zones, along with the northward drift of Pangea. These processes occurred simultaneously with a major mantle reorganization from a huge cold downwelling to a hot upwelling event caused by thermal energy storage beneath Pangea.
format Articulo
Articulo
author Vizán, Haroldo
Prezzi, Claudia Beatriz
Geuna, Silvana Evangelina
Japas, María Silvia
Renda, Emiliano Manuel
Franzese, Juan Rafael
Van Zele, María Andrea
author_facet Vizán, Haroldo
Prezzi, Claudia Beatriz
Geuna, Silvana Evangelina
Japas, María Silvia
Renda, Emiliano Manuel
Franzese, Juan Rafael
Van Zele, María Andrea
author_sort Vizán, Haroldo
title Paleotethys slab pull, self-lubricated weak lithospheric zones, poloidal and toroidal plate motions, and Gondwana tectonics
title_short Paleotethys slab pull, self-lubricated weak lithospheric zones, poloidal and toroidal plate motions, and Gondwana tectonics
title_full Paleotethys slab pull, self-lubricated weak lithospheric zones, poloidal and toroidal plate motions, and Gondwana tectonics
title_fullStr Paleotethys slab pull, self-lubricated weak lithospheric zones, poloidal and toroidal plate motions, and Gondwana tectonics
title_full_unstemmed Paleotethys slab pull, self-lubricated weak lithospheric zones, poloidal and toroidal plate motions, and Gondwana tectonics
title_sort paleotethys slab pull, self-lubricated weak lithospheric zones, poloidal and toroidal plate motions, and gondwana tectonics
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/87150
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