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Oceanic mantle reflections in deep seismic profiles offshore Sumatra are faults or fakes
In the late 90’s, some faults identified within oceanic crust were demonstrated to be artifacts arising from out-of-plane scattering along linear sediment-buried fault scarps. Symmetrical mantle reflections observed southwest northern Sumatra on seismic reflection profiles have been identified as fa...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6746736/ https://www.ncbi.nlm.nih.gov/pubmed/31527684 http://dx.doi.org/10.1038/s41598-019-49607-x |
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author | Sibuet, Jean-Claude He, Enyuan Zhao, Minghui Pang, Xinming Klingelhoefer, Frauke |
author_facet | Sibuet, Jean-Claude He, Enyuan Zhao, Minghui Pang, Xinming Klingelhoefer, Frauke |
author_sort | Sibuet, Jean-Claude |
collection | PubMed |
description | In the late 90’s, some faults identified within oceanic crust were demonstrated to be artifacts arising from out-of-plane scattering along linear sediment-buried fault scarps. Symmetrical mantle reflections observed southwest northern Sumatra on seismic reflection profiles have been identified as faults cutting through the upper mantle down to unprecedented depths reaching ~45 km. Seawater being conveyed along sub-vertical re-activated fracture zones (FZs) to the upper mantle, the mantle portions of FZs are serpentinized and act as mirrors for seismic rays. We suggest that the mantle features are not faults but artifacts resulting from out-of-plane reflections on these mirrors. Two perpendicular seismic profiles crossing the same FZ display two dipping features down to 30 km, which cannot be explained as faults from recent tectonic and structural constraints but merely as out-of-plane reflections on this FZ. This result confirms that most of mantle reflections observed southwest northern Sumatra are fakes rather than faults. |
format | Online Article Text |
id | pubmed-6746736 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-67467362019-09-27 Oceanic mantle reflections in deep seismic profiles offshore Sumatra are faults or fakes Sibuet, Jean-Claude He, Enyuan Zhao, Minghui Pang, Xinming Klingelhoefer, Frauke Sci Rep Article In the late 90’s, some faults identified within oceanic crust were demonstrated to be artifacts arising from out-of-plane scattering along linear sediment-buried fault scarps. Symmetrical mantle reflections observed southwest northern Sumatra on seismic reflection profiles have been identified as faults cutting through the upper mantle down to unprecedented depths reaching ~45 km. Seawater being conveyed along sub-vertical re-activated fracture zones (FZs) to the upper mantle, the mantle portions of FZs are serpentinized and act as mirrors for seismic rays. We suggest that the mantle features are not faults but artifacts resulting from out-of-plane reflections on these mirrors. Two perpendicular seismic profiles crossing the same FZ display two dipping features down to 30 km, which cannot be explained as faults from recent tectonic and structural constraints but merely as out-of-plane reflections on this FZ. This result confirms that most of mantle reflections observed southwest northern Sumatra are fakes rather than faults. Nature Publishing Group UK 2019-09-16 /pmc/articles/PMC6746736/ /pubmed/31527684 http://dx.doi.org/10.1038/s41598-019-49607-x Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Sibuet, Jean-Claude He, Enyuan Zhao, Minghui Pang, Xinming Klingelhoefer, Frauke Oceanic mantle reflections in deep seismic profiles offshore Sumatra are faults or fakes |
title | Oceanic mantle reflections in deep seismic profiles offshore Sumatra are faults or fakes |
title_full | Oceanic mantle reflections in deep seismic profiles offshore Sumatra are faults or fakes |
title_fullStr | Oceanic mantle reflections in deep seismic profiles offshore Sumatra are faults or fakes |
title_full_unstemmed | Oceanic mantle reflections in deep seismic profiles offshore Sumatra are faults or fakes |
title_short | Oceanic mantle reflections in deep seismic profiles offshore Sumatra are faults or fakes |
title_sort | oceanic mantle reflections in deep seismic profiles offshore sumatra are faults or fakes |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6746736/ https://www.ncbi.nlm.nih.gov/pubmed/31527684 http://dx.doi.org/10.1038/s41598-019-49607-x |
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