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Interaction of Cocos and Rivera plates with the upper-mantle transition zone underneath central Mexico

Pérez-Campos, Xyoli and Clayton, Robert W. (2014) Interaction of Cocos and Rivera plates with the upper-mantle transition zone underneath central Mexico. Geophysical Journal International, 197 (3). pp. 1763-1769. ISSN 0956-540X. http://resolver.caltech.edu/CaltechAUTHORS:20140703-103933633

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Abstract

Receiver functions (RFs) from 224 permanent and temporary stations in central and southern Mexico were used to characterize the upper-mantle transition zone in that region. Discontinuities at 410 and 660 km depth are both deeper compared to iasp91, which reflects a slow velocity anomaly in the upper mantle. They show topography on the interfaces that is consistent with the interaction of the subducted slab or its broken off extension. A low-velocity layer on top of the 410 is identified mainly on the continental side of where the slab pierces it (i.e. in the lee of the slab roll-back). In general the RFs show a complex behaviour where the mantle has been disturbed by the lateral motion of the subducted slab, and are simple where it has not. Complexity on the 660 coincides with the place where the broken off portion of the Farallon Plate would have penetrated this interface or is possibly lying on top of it.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1093/gji/ggu087DOIArticle
http://gji.oxfordjournals.org/content/197/3/1763PublisherArticle
ORCID:
AuthorORCID
Clayton, Robert W.0000-0003-3323-3508
Additional Information:© 2014 The Authors. Accepted 2014 March 7. Received 2014 February 28; in original form 2013 July 25. Figures were done using Generic Mapping Tools (GMT; Wessel & Smith 1991). We thank C. Cárdenas and E.A. Solano for providing noise curves for the SSN. We thank all the volunteers that made possible the operation of MASE, VEOX, MARS, GGAP and CONA, and the SSN personnel for installation and maintenance of the stations and making possible data availability. CONA stations were funded by Conacyt project J51566-F. GGAP stations were funded through the Agence Nationale de la Recherche (France) under the contract RA0000CO69 (ANR G-GAP). Fund for this work was provided by DGAPA-UNAM project IN105910 and the Tectonics Observatory at Caltech, which is funded by the Betty and Gordon Moore Foundation. This is contribution #233 from the Tectonics Observatory. XP-C had a sabbatical fellowship from DGAPA-UNAM and thanks the Tectonics Observatory at Caltech for partial funding for her sabbatical. We further thank B. Tauzin and an anonymous reviewer whose comments helped improve this paper.
Group:Caltech Tectonics Observatory, Seismological Laboratory
Funders:
Funding AgencyGrant Number
CONACyT (Mexico)J51566-F
Agence Nationale pour la Recherche (ANR) (France)RA0000CO69
DGAPA-UNAMIN105910
Caltech Tectonics ObservatoryUNSPECIFIED
Gordon and Betty Moore FoundationUNSPECIFIED
Subject Keywords:Mantle processes; Phase transitions; North America
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Caltech Tectonics Observatory233
Record Number:CaltechAUTHORS:20140703-103933633
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20140703-103933633
Official Citation:Pérez-Campos, X., & Clayton, R. W. (2014). Interaction of Cocos and Rivera plates with the upper-mantle transition zone underneath central Mexico. Geophysical Journal International, 197(3), 1763-1769. doi: 10.1093/gji/ggu087
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46809
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:07 Jul 2014 21:25
Last Modified:31 Jan 2017 20:42

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