Back-Arc Extension of the Central Bransfield Basin Induced by Ridge–Trench Collision: Implications From Ambient Noise Tomography and Stress Field Inversion
The authors appreciate the efforts of all the BRAVOSEIS team members, including Enrique Carmona, Rafa Abella, Paco Carrion, Feli Agui, Alfonso Ontiveros, Jose Luis Granja, Ivan Fernandez, and Rabea Sondershaus, in collecting the data used in this study. The authors thank the German Instrument Pool f...
Published in: | Geophysical Research Letters |
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Language: | English |
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American Geophysical Union
2021
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Online Access: | http://hdl.handle.net/10481/72138 https://doi.org/10.1029/2021GL095032 |
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ftunivgranada:oai:digibug.ugr.es:10481/72138 2023-05-15T13:46:00+02:00 Back-Arc Extension of the Central Bransfield Basin Induced by Ridge–Trench Collision: Implications From Ambient Noise Tomography and Stress Field Inversion Li, Wei Almendros González, Francisco Javier 2021-10-16 http://hdl.handle.net/10481/72138 https://doi.org/10.1029/2021GL095032 eng eng American Geophysical Union Li, W. [et al.] (2021). Back-arc extension of the Central Bransfield Basin induced by ridge–trench collision: Implications from ambient noise tomography and stress field inversion. Geophysical Research Letters, 48, e2021GL095032. [https://doi.org/10.1029/2021GL095032] http://hdl.handle.net/10481/72138 doi:10.1029/2021GL095032 Atribución-NoComercial 3.0 España http://creativecommons.org/licenses/by-nc/3.0/es/ info:eu-repo/semantics/openAccess CC-BY-NC Ambient noise tomography S-wave velocity structure Back-arc extension Ridge-trench collision Bransfield Basin Phoenix Plate info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2021 ftunivgranada https://doi.org/10.1029/2021GL095032 2021-12-22T00:23:37Z The authors appreciate the efforts of all the BRAVOSEIS team members, including Enrique Carmona, Rafa Abella, Paco Carrion, Feli Agui, Alfonso Ontiveros, Jose Luis Granja, Ivan Fernandez, and Rabea Sondershaus, in collecting the data used in this study. The authors thank the German Instrument Pool for Amphibian Seismology (DEPAS, Schmidt-Aursch & Haberland, 2017) for providing seismic instruments for networks 5M and ZX. The authors thank all participants in the BRAVOSEIS 2018, 2019, and 2020 cruises and all staff involved in the realization of the surveys. We use the Generic Mapping Tools (Wessel et al., 2013) to generate the figures. This research is jointly supported by the BRAVOSEIS project (CTM2016-77315-R), AWI, and GFZ. W. Li is also supported by the National Natural Science Foundation of China (41804056) and the Sino-German (CSC-DAAD) Postdoc Scholarship. Constructive comments from the associate editor and two anonymous reviewers helped improve the manuscript. Open access funding enabled and organized by Projekt DEAL. The Bransfield Basin is a young (∼4 Ma) back-arc basin related to the remnant subduction of the Phoenix Plate that once existed along the entire Pacific margin of the Antarctic Peninsula. Based on a recently deployed amphibious seismic network, we use ambient noise tomography to obtain the S-wave velocity structure in the Central Bransfield Basin (CBB). Combining with the stress field inverted from focal mechanisms, our images reveal that the CBB suffers a significant extension in the northwest-southeast direction. The extension is strongest in the northeastern CBB with associated mantle exhumation and weakens to the southwest with decoupled deformations between the upper crust and lithospheric mantle. Such an along-strike variation of extension can be explained by slab window formation and forearc rotation, which are associated with the Phoenix Plate detachment during the ridge– trench collisions at the southwest of the Hero Fracture Zone. BRAVOSEIS project CTM2016-77315-R AWI GFZ National Natural Science Foundation of China (NSFC) 41804056 Sino-German (CSC-DAAD) Postdoc Scholarship Projekt DEAL Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula DIGIBUG: Repositorio Institucional de la Universidad de Granada Antarctic The Antarctic Antarctic Peninsula Pacific Fernandez ENVELOPE(-62.233,-62.233,-63.250,-63.250) Carmona ENVELOPE(-62.917,-62.917,-64.900,-64.900) Hero Fracture Zone ENVELOPE(-66.000,-66.000,-61.500,-61.500) Geophysical Research Letters 48 21 |
institution |
Open Polar |
collection |
DIGIBUG: Repositorio Institucional de la Universidad de Granada |
op_collection_id |
ftunivgranada |
language |
English |
topic |
Ambient noise tomography S-wave velocity structure Back-arc extension Ridge-trench collision Bransfield Basin Phoenix Plate |
spellingShingle |
Ambient noise tomography S-wave velocity structure Back-arc extension Ridge-trench collision Bransfield Basin Phoenix Plate Li, Wei Almendros González, Francisco Javier Back-Arc Extension of the Central Bransfield Basin Induced by Ridge–Trench Collision: Implications From Ambient Noise Tomography and Stress Field Inversion |
topic_facet |
Ambient noise tomography S-wave velocity structure Back-arc extension Ridge-trench collision Bransfield Basin Phoenix Plate |
description |
The authors appreciate the efforts of all the BRAVOSEIS team members, including Enrique Carmona, Rafa Abella, Paco Carrion, Feli Agui, Alfonso Ontiveros, Jose Luis Granja, Ivan Fernandez, and Rabea Sondershaus, in collecting the data used in this study. The authors thank the German Instrument Pool for Amphibian Seismology (DEPAS, Schmidt-Aursch & Haberland, 2017) for providing seismic instruments for networks 5M and ZX. The authors thank all participants in the BRAVOSEIS 2018, 2019, and 2020 cruises and all staff involved in the realization of the surveys. We use the Generic Mapping Tools (Wessel et al., 2013) to generate the figures. This research is jointly supported by the BRAVOSEIS project (CTM2016-77315-R), AWI, and GFZ. W. Li is also supported by the National Natural Science Foundation of China (41804056) and the Sino-German (CSC-DAAD) Postdoc Scholarship. Constructive comments from the associate editor and two anonymous reviewers helped improve the manuscript. Open access funding enabled and organized by Projekt DEAL. The Bransfield Basin is a young (∼4 Ma) back-arc basin related to the remnant subduction of the Phoenix Plate that once existed along the entire Pacific margin of the Antarctic Peninsula. Based on a recently deployed amphibious seismic network, we use ambient noise tomography to obtain the S-wave velocity structure in the Central Bransfield Basin (CBB). Combining with the stress field inverted from focal mechanisms, our images reveal that the CBB suffers a significant extension in the northwest-southeast direction. The extension is strongest in the northeastern CBB with associated mantle exhumation and weakens to the southwest with decoupled deformations between the upper crust and lithospheric mantle. Such an along-strike variation of extension can be explained by slab window formation and forearc rotation, which are associated with the Phoenix Plate detachment during the ridge– trench collisions at the southwest of the Hero Fracture Zone. BRAVOSEIS project CTM2016-77315-R AWI GFZ National Natural Science Foundation of China (NSFC) 41804056 Sino-German (CSC-DAAD) Postdoc Scholarship Projekt DEAL |
format |
Article in Journal/Newspaper |
author |
Li, Wei Almendros González, Francisco Javier |
author_facet |
Li, Wei Almendros González, Francisco Javier |
author_sort |
Li, Wei |
title |
Back-Arc Extension of the Central Bransfield Basin Induced by Ridge–Trench Collision: Implications From Ambient Noise Tomography and Stress Field Inversion |
title_short |
Back-Arc Extension of the Central Bransfield Basin Induced by Ridge–Trench Collision: Implications From Ambient Noise Tomography and Stress Field Inversion |
title_full |
Back-Arc Extension of the Central Bransfield Basin Induced by Ridge–Trench Collision: Implications From Ambient Noise Tomography and Stress Field Inversion |
title_fullStr |
Back-Arc Extension of the Central Bransfield Basin Induced by Ridge–Trench Collision: Implications From Ambient Noise Tomography and Stress Field Inversion |
title_full_unstemmed |
Back-Arc Extension of the Central Bransfield Basin Induced by Ridge–Trench Collision: Implications From Ambient Noise Tomography and Stress Field Inversion |
title_sort |
back-arc extension of the central bransfield basin induced by ridge–trench collision: implications from ambient noise tomography and stress field inversion |
publisher |
American Geophysical Union |
publishDate |
2021 |
url |
http://hdl.handle.net/10481/72138 https://doi.org/10.1029/2021GL095032 |
long_lat |
ENVELOPE(-62.233,-62.233,-63.250,-63.250) ENVELOPE(-62.917,-62.917,-64.900,-64.900) ENVELOPE(-66.000,-66.000,-61.500,-61.500) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Pacific Fernandez Carmona Hero Fracture Zone |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Pacific Fernandez Carmona Hero Fracture Zone |
genre |
Antarc* Antarctic Antarctic Peninsula |
genre_facet |
Antarc* Antarctic Antarctic Peninsula |
op_relation |
Li, W. [et al.] (2021). Back-arc extension of the Central Bransfield Basin induced by ridge–trench collision: Implications from ambient noise tomography and stress field inversion. Geophysical Research Letters, 48, e2021GL095032. [https://doi.org/10.1029/2021GL095032] http://hdl.handle.net/10481/72138 doi:10.1029/2021GL095032 |
op_rights |
Atribución-NoComercial 3.0 España http://creativecommons.org/licenses/by-nc/3.0/es/ info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY-NC |
op_doi |
https://doi.org/10.1029/2021GL095032 |
container_title |
Geophysical Research Letters |
container_volume |
48 |
container_issue |
21 |
_version_ |
1766234807264608256 |