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Flat slab deformation caused by interplate suction force

Ma, Yiran and Clayton, Robert W. (2015) Flat slab deformation caused by interplate suction force. Geophysical Research Letters, 42 (17). pp. 7064-7072. ISSN 0094-8276. http://resolver.caltech.edu/CaltechAUTHORS:20151112-141913068

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Abstract

We image the structure at the southern end of the Peruvian flat subduction zone, using receiver function and surface wave methods. The Nazca slab subducts to ~100 km depth and then remains flat for ~300 km distance before it resumes the dipping subduction. The flat slab closely follows the topography of the continental Moho above, indicating a strong suction force between the slab and the overriding plate. A high-velocity mantle wedge exists above the initial half of the flat slab, and the velocity resumes to normal values before the slab steepens again, indicating the resumption of dehydration and ecologitization. Two prominent midcrust structures are revealed in the 70 km thick crust under the Central Andes: molten rocks beneath the Western Cordillera and the underthrusting Brazilian Shield beneath the Eastern Cordillera.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1002/2015GL065195DOIArticle
http://onlinelibrary.wiley.com/doi/10.1002/2015GL065195/abstractPublisherArticle
ORCID:
AuthorORCID
Ma, Yiran0000-0002-8369-3310
Clayton, Robert W.0000-0003-3323-3508
Additional Information:© 2015 American Geophysical Union. Received 1 JUL 2015; Accepted 17 AUG 2015; Accepted article online 20 AUG 2015; Published online 12 SEP 2015. The PeruSE experiment was supported by the Gordon and Betty Moore Foundation and NSF (EAR-1045683), and the data used are available through IRIS. We thank Lara Wagner and other members of the PULSE experiment for providing data from six stations. We also thank the Editor and reviewers for constructive comments. The script files necessary to reproduce the results are available from the authors upon request.
Group:Seismological Laboratory
Funders:
Funding AgencyGrant Number
Gordon and Betty Moore FoundationUNSPECIFIED
NSFEAR-1045683
Record Number:CaltechAUTHORS:20151112-141913068
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20151112-141913068
Official Citation:Ma, Y., and R. W. Clayton (2015), Flat slab deformation caused by interplate suction force, Geophys. Res. Lett., 42, 7064–7072, doi:10.1002/2015GL065195
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:62079
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:18 Nov 2015 18:17
Last Modified:17 Apr 2017 22:56

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