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Seismological evidence for the earliest global subduction network at 2 Ga ago
The earliest evidence for subduction, which could have been localized, does not signify when plate tectonics became a global phenomenon. To test the antiquity of global subduction, we investigated Paleoproterozoic time, for which seismic evidence is available from multiple continents. We used a new...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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American Association for the Advancement of Science
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7406333/ https://www.ncbi.nlm.nih.gov/pubmed/32821847 http://dx.doi.org/10.1126/sciadv.abc5491 |
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author | Wan, Bo Yang, Xusong Tian, Xiaobo Yuan, Huaiyu Kirscher, Uwe Mitchell, Ross N. |
author_facet | Wan, Bo Yang, Xusong Tian, Xiaobo Yuan, Huaiyu Kirscher, Uwe Mitchell, Ross N. |
author_sort | Wan, Bo |
collection | PubMed |
description | The earliest evidence for subduction, which could have been localized, does not signify when plate tectonics became a global phenomenon. To test the antiquity of global subduction, we investigated Paleoproterozoic time, for which seismic evidence is available from multiple continents. We used a new high-density seismic array in North China to image the crustal structure that exhibits a dipping Moho bearing close resemblance to that of the modern Himalaya. The relict collisional zone is Paleoproterozoic in age and implies subduction operating at least as early as ~2 billion years (Ga) ago. Seismic evidence of subduction from six continents at this age is interpreted as the oldest evidence of global plate tectonics. The sutures identified can be linked in a plate network that resulted in the assembly of Nuna, likely Earth’s first supercontinent. Global subduction by ~2 Ga ago can explain why secular planetary cooling was not appreciable until Proterozoic time. |
format | Online Article Text |
id | pubmed-7406333 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | American Association for the Advancement of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-74063332020-08-19 Seismological evidence for the earliest global subduction network at 2 Ga ago Wan, Bo Yang, Xusong Tian, Xiaobo Yuan, Huaiyu Kirscher, Uwe Mitchell, Ross N. Sci Adv Research Articles The earliest evidence for subduction, which could have been localized, does not signify when plate tectonics became a global phenomenon. To test the antiquity of global subduction, we investigated Paleoproterozoic time, for which seismic evidence is available from multiple continents. We used a new high-density seismic array in North China to image the crustal structure that exhibits a dipping Moho bearing close resemblance to that of the modern Himalaya. The relict collisional zone is Paleoproterozoic in age and implies subduction operating at least as early as ~2 billion years (Ga) ago. Seismic evidence of subduction from six continents at this age is interpreted as the oldest evidence of global plate tectonics. The sutures identified can be linked in a plate network that resulted in the assembly of Nuna, likely Earth’s first supercontinent. Global subduction by ~2 Ga ago can explain why secular planetary cooling was not appreciable until Proterozoic time. American Association for the Advancement of Science 2020-08-05 /pmc/articles/PMC7406333/ /pubmed/32821847 http://dx.doi.org/10.1126/sciadv.abc5491 Text en Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/ https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. |
spellingShingle | Research Articles Wan, Bo Yang, Xusong Tian, Xiaobo Yuan, Huaiyu Kirscher, Uwe Mitchell, Ross N. Seismological evidence for the earliest global subduction network at 2 Ga ago |
title | Seismological evidence for the earliest global subduction network at 2 Ga ago |
title_full | Seismological evidence for the earliest global subduction network at 2 Ga ago |
title_fullStr | Seismological evidence for the earliest global subduction network at 2 Ga ago |
title_full_unstemmed | Seismological evidence for the earliest global subduction network at 2 Ga ago |
title_short | Seismological evidence for the earliest global subduction network at 2 Ga ago |
title_sort | seismological evidence for the earliest global subduction network at 2 ga ago |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7406333/ https://www.ncbi.nlm.nih.gov/pubmed/32821847 http://dx.doi.org/10.1126/sciadv.abc5491 |
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