Subduction geometry beneath south-central Alaska and its relationship to volcanism
The southern Alaskan margin captures a transition between compression and strike-slip-dominated deformation, accretion of the overthickened Yakutat terrane, termination of Aleutian arcmagmatism, and the enigmatic Wrangell Volcanic Field. The extent of subduction and mantle structurebelow this region...
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Online Access: | http://hdl.handle.net/10044/1/39933 https://doi.org/10.1002/2016GL070580 |
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ftimperialcol:oai:spiral.imperial.ac.uk:10044/1/39933 2023-05-15T18:44:37+02:00 Subduction geometry beneath south-central Alaska and its relationship to volcanism Martin-Short, R Allen, R Bastow, ID The Leverhulme Trust 2016-09-06 http://hdl.handle.net/10044/1/39933 https://doi.org/10.1002/2016GL070580 unknown American Geophysical Union (AGU) Geophysical Research Letters ?? 2016. American Geophysical Union. All Rights Reserved. This is the peer reviewed version of the following article: Martin-Short, R., R. M. Allen, and I. D. Bastow (2016), Subduction geometry beneath south central Alaska and its relationship to volcanism, Geophys. Res. Lett., 43, which has been published in final form at https://dx.doi.org/10.1002/2016GL070580. This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving. 9517 9509 Science & Technology Physical Sciences Geosciences Multidisciplinary Geology TRAVEL-TIMES FINITE-FREQUENCY NORTH-AMERICA PLATE WRANGELL ZONE VELOCITIES MAGMATISM MODEL BASIN Meteorology & Atmospheric Sciences MD Multidisciplinary Journal Article 2016 ftimperialcol https://doi.org/10.1002/2016GL070580 2018-09-16T05:56:51Z The southern Alaskan margin captures a transition between compression and strike-slip-dominated deformation, accretion of the overthickened Yakutat terrane, termination of Aleutian arcmagmatism, and the enigmatic Wrangell Volcanic Field. The extent of subduction and mantle structurebelow this region is uncertain, with important implications for volcanism. We present compressional andshear wave mantle velocity models below south central Alaska that leverage a new seismometer deploymentto produce the most complete image of the subducting Paci???c-Yakutat plate to date. We image a steeplydipping slab extending below central Alaska to >400 km depth, which abruptly terminates east of ~145??W.There is no signi???cant slab anomaly beneath the nearby Wrangell volcanoes. A paucity of volcanism isobserved above the subducting Yakutat terrane, but the slab structure below 150 km depth andWadati-Benioff zone here are similar to those along the Aleutian-Alaska arc. Features of the mantle wedge oroverlying lithosphere are thus responsible for the volcanic gap. Article in Journal/Newspaper Yakutat Alaska Imperial College London: Spiral Geophysical Research Letters 43 18 9509 9517 |
institution |
Open Polar |
collection |
Imperial College London: Spiral |
op_collection_id |
ftimperialcol |
language |
unknown |
topic |
Science & Technology Physical Sciences Geosciences Multidisciplinary Geology TRAVEL-TIMES FINITE-FREQUENCY NORTH-AMERICA PLATE WRANGELL ZONE VELOCITIES MAGMATISM MODEL BASIN Meteorology & Atmospheric Sciences MD Multidisciplinary |
spellingShingle |
Science & Technology Physical Sciences Geosciences Multidisciplinary Geology TRAVEL-TIMES FINITE-FREQUENCY NORTH-AMERICA PLATE WRANGELL ZONE VELOCITIES MAGMATISM MODEL BASIN Meteorology & Atmospheric Sciences MD Multidisciplinary Martin-Short, R Allen, R Bastow, ID Subduction geometry beneath south-central Alaska and its relationship to volcanism |
topic_facet |
Science & Technology Physical Sciences Geosciences Multidisciplinary Geology TRAVEL-TIMES FINITE-FREQUENCY NORTH-AMERICA PLATE WRANGELL ZONE VELOCITIES MAGMATISM MODEL BASIN Meteorology & Atmospheric Sciences MD Multidisciplinary |
description |
The southern Alaskan margin captures a transition between compression and strike-slip-dominated deformation, accretion of the overthickened Yakutat terrane, termination of Aleutian arcmagmatism, and the enigmatic Wrangell Volcanic Field. The extent of subduction and mantle structurebelow this region is uncertain, with important implications for volcanism. We present compressional andshear wave mantle velocity models below south central Alaska that leverage a new seismometer deploymentto produce the most complete image of the subducting Paci???c-Yakutat plate to date. We image a steeplydipping slab extending below central Alaska to >400 km depth, which abruptly terminates east of ~145??W.There is no signi???cant slab anomaly beneath the nearby Wrangell volcanoes. A paucity of volcanism isobserved above the subducting Yakutat terrane, but the slab structure below 150 km depth andWadati-Benioff zone here are similar to those along the Aleutian-Alaska arc. Features of the mantle wedge oroverlying lithosphere are thus responsible for the volcanic gap. |
author2 |
The Leverhulme Trust |
format |
Article in Journal/Newspaper |
author |
Martin-Short, R Allen, R Bastow, ID |
author_facet |
Martin-Short, R Allen, R Bastow, ID |
author_sort |
Martin-Short, R |
title |
Subduction geometry beneath south-central Alaska and its relationship to volcanism |
title_short |
Subduction geometry beneath south-central Alaska and its relationship to volcanism |
title_full |
Subduction geometry beneath south-central Alaska and its relationship to volcanism |
title_fullStr |
Subduction geometry beneath south-central Alaska and its relationship to volcanism |
title_full_unstemmed |
Subduction geometry beneath south-central Alaska and its relationship to volcanism |
title_sort |
subduction geometry beneath south-central alaska and its relationship to volcanism |
publisher |
American Geophysical Union (AGU) |
publishDate |
2016 |
url |
http://hdl.handle.net/10044/1/39933 https://doi.org/10.1002/2016GL070580 |
genre |
Yakutat Alaska |
genre_facet |
Yakutat Alaska |
op_source |
9517 9509 |
op_relation |
Geophysical Research Letters |
op_rights |
?? 2016. American Geophysical Union. All Rights Reserved. This is the peer reviewed version of the following article: Martin-Short, R., R. M. Allen, and I. D. Bastow (2016), Subduction geometry beneath south central Alaska and its relationship to volcanism, Geophys. Res. Lett., 43, which has been published in final form at https://dx.doi.org/10.1002/2016GL070580. This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving. |
op_doi |
https://doi.org/10.1002/2016GL070580 |
container_title |
Geophysical Research Letters |
container_volume |
43 |
container_issue |
18 |
container_start_page |
9509 |
op_container_end_page |
9517 |
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1766235408307322880 |