Adamastor – an ocean that never existed?
Existing models of tectonic evolution of the Neoproterozoic orogenic system rimming the shores of the South Atlantic Ocean (the Araçuaí–Ribeira–Congo and Dom Feliciano–Kaoko–Gariep belts) interpret the belts as subduction-related orogens and emphasize the role of the “Adamastor Ocean” in their pre-c...
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Online Access: | https://hdl.handle.net/10037/19230 https://doi.org/10.1016/j.earscirev.2020.103201 |
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ftunivtroemsoe:oai:munin.uit.no:10037/19230 2023-05-15T18:21:11+02:00 Adamastor – an ocean that never existed? Konopasek, Jiri Cavalcante, Carolina Fossen, Haakon Janoušek, Vojtěch 2020-05-08 https://hdl.handle.net/10037/19230 https://doi.org/10.1016/j.earscirev.2020.103201 eng eng Elsevier Earth-Science Reviews Konopasek, Cavalcante, Fossen, Janoušek. Adamastor – an ocean that never existed?. Earth-Science Reviews. 2020;205:103201:1-18 FRIDAID 1818717 doi:10.1016/j.earscirev.2020.103201 0012-8252 1872-6828 https://hdl.handle.net/10037/19230 openAccess Copyright 2020 The Author(s) VDP::Mathematics and natural science: 400::Geosciences: 450::Tectonics: 463 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Tektonikk: 463 Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2020 ftunivtroemsoe https://doi.org/10.1016/j.earscirev.2020.103201 2021-06-25T17:57:39Z Existing models of tectonic evolution of the Neoproterozoic orogenic system rimming the shores of the South Atlantic Ocean (the Araçuaí–Ribeira–Congo and Dom Feliciano–Kaoko–Gariep belts) interpret the belts as subduction-related orogens and emphasize the role of the “Adamastor Ocean” in their pre-collisional evolution. A critical problem in such an interpretation is the confined nature of the northern termination of the orogenic system, as well as a very short time span between the end of rifting and onset of convergence recognized in its southern part. In this contribution, we review the data for the pre- and synorogenic evolution of this system of orogens (here collectively called the South Atlantic Neoproterozoic Orogenic System) and show that the data speak against the presence of a large oceanic domain before the onset of its orogenic evolution. We propose a new and simple intracontinental model, suggesting that Neoproterozoic oceanic crust played only a minor role in the development of the South Atlantic Neoproterozoic Orogenic System and that its overall architecture and thermal evolution is the result of inversion of large-scale rift structures with a protracted, and probably episodic, extensional history. True oceanic crust probably developed only in the southern part of the rift system, but it must have been narrow, akin to the Red Sea–Gulf of Aden stage of the “Adamastor Rift” evolution just before the onset of convergent thickening. Article in Journal/Newspaper South Atlantic Ocean University of Tromsø: Munin Open Research Archive Earth-Science Reviews 205 103201 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Geosciences: 450::Tectonics: 463 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Tektonikk: 463 |
spellingShingle |
VDP::Mathematics and natural science: 400::Geosciences: 450::Tectonics: 463 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Tektonikk: 463 Konopasek, Jiri Cavalcante, Carolina Fossen, Haakon Janoušek, Vojtěch Adamastor – an ocean that never existed? |
topic_facet |
VDP::Mathematics and natural science: 400::Geosciences: 450::Tectonics: 463 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Tektonikk: 463 |
description |
Existing models of tectonic evolution of the Neoproterozoic orogenic system rimming the shores of the South Atlantic Ocean (the Araçuaí–Ribeira–Congo and Dom Feliciano–Kaoko–Gariep belts) interpret the belts as subduction-related orogens and emphasize the role of the “Adamastor Ocean” in their pre-collisional evolution. A critical problem in such an interpretation is the confined nature of the northern termination of the orogenic system, as well as a very short time span between the end of rifting and onset of convergence recognized in its southern part. In this contribution, we review the data for the pre- and synorogenic evolution of this system of orogens (here collectively called the South Atlantic Neoproterozoic Orogenic System) and show that the data speak against the presence of a large oceanic domain before the onset of its orogenic evolution. We propose a new and simple intracontinental model, suggesting that Neoproterozoic oceanic crust played only a minor role in the development of the South Atlantic Neoproterozoic Orogenic System and that its overall architecture and thermal evolution is the result of inversion of large-scale rift structures with a protracted, and probably episodic, extensional history. True oceanic crust probably developed only in the southern part of the rift system, but it must have been narrow, akin to the Red Sea–Gulf of Aden stage of the “Adamastor Rift” evolution just before the onset of convergent thickening. |
format |
Article in Journal/Newspaper |
author |
Konopasek, Jiri Cavalcante, Carolina Fossen, Haakon Janoušek, Vojtěch |
author_facet |
Konopasek, Jiri Cavalcante, Carolina Fossen, Haakon Janoušek, Vojtěch |
author_sort |
Konopasek, Jiri |
title |
Adamastor – an ocean that never existed? |
title_short |
Adamastor – an ocean that never existed? |
title_full |
Adamastor – an ocean that never existed? |
title_fullStr |
Adamastor – an ocean that never existed? |
title_full_unstemmed |
Adamastor – an ocean that never existed? |
title_sort |
adamastor – an ocean that never existed? |
publisher |
Elsevier |
publishDate |
2020 |
url |
https://hdl.handle.net/10037/19230 https://doi.org/10.1016/j.earscirev.2020.103201 |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_relation |
Earth-Science Reviews Konopasek, Cavalcante, Fossen, Janoušek. Adamastor – an ocean that never existed?. Earth-Science Reviews. 2020;205:103201:1-18 FRIDAID 1818717 doi:10.1016/j.earscirev.2020.103201 0012-8252 1872-6828 https://hdl.handle.net/10037/19230 |
op_rights |
openAccess Copyright 2020 The Author(s) |
op_doi |
https://doi.org/10.1016/j.earscirev.2020.103201 |
container_title |
Earth-Science Reviews |
container_volume |
205 |
container_start_page |
103201 |
_version_ |
1766200323592945664 |