• Login
    View Item 
    •   Home
    • Research
    • Articles
    • View Item
    •   Home
    • Research
    • Articles
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of KAUSTCommunitiesIssue DateSubmit DateThis CollectionIssue DateSubmit Date

    My Account

    Login

    Quick Links

    Open Access PolicyORCID LibguidePlumX LibguideSubmit an Item

    Statistics

    Display statistics

    Transient tectonic regimes imposed by megathrust earthquakes and the growth of NW-trending volcanic systems in the Southern Andes

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    2019_Lupi_Tectonophysics.pdf
    Size:
    3.630Mb
    Format:
    PDF
    Description:
    Accepted Manuscript
    Embargo End Date:
    2021-11-25
    Download
    Type
    Article
    Authors
    Lupi, Matteo cc
    Trippanera, Daniele cc
    Gonzalez, Diego cc
    D'amico, Sebastiano cc
    Acocella, Valerio
    Cabello, Catalina
    Stef, Marc Muelle
    Tassara, Andres cc
    KAUST Department
    Physical Science and Engineering (PSE) Division
    Date
    2019-11-25
    Online Publication Date
    2019-11-25
    Print Publication Date
    2020-01
    Embargo End Date
    2021-11-25
    Permanent link to this record
    http://hdl.handle.net/10754/660582
    
    Metadata
    Show full item record
    Abstract
    Geophysical data show that megathrust earthquakes can promote transient tectonic regimes lasting up to several decades. However, such variations are not trivial to be recognises in the geological records of volcanic arcs. To better understand the occurrence of transient tectonic regimes we study the inter- and post-seismic deformation in the upper crust of the Andean volcanic arc affected by the M8.8 2010 Maule earthquake. We focus on the region around the Nevados de Chillán Volcanic Complex, Southern Central Chile, where we compare geological and earthquakes data. This NW-oriented Andean-transverse volcanic complex faces one of the regions that slipped the most during the 2010 M8.8 Maule earthquake. Field fault-slip data from lithostratigraphic units forming the basement of Nevados de Chillan Volcanic Complex point out three tectonic regimes. The principal is driven by a sub-horizontal and NE-oriented σ1 (transpressional kinematics). This regime is compatible with today's GPS data recorded during inter-seismic periods. The second and third tectonic regimes are less abundant and indicate transpression (σ1 sub-horizontal and NW-oriented) and normal (σ1 sub-vertical and E-W-oriented) faulting, respectively. The geological record was also compared with seismic data acquired from 2010 to 2015 in the investigated region. The moderate-magnitude seismic activity occurred beneath the volcanic arc after the Maule earthquake points out an enhanced crustal deformation if compared to inter-seismic periods. The inversion of focal mechanisms suggests that intra-arc regions may experience a short-lived post-seismic transtensional regime with an E-W oriented σ1 with a dip of about 45°. Our work suggests that megathrust earthquakes impose transient stress variations in the volcanic arc, possibly reactivating Oligo-Miocene NW-striking inherited crustal structures, upon which volcanic edifices develop. This may help explaining the occurrence of Andean-transverse volcanic complexes oriented sub-perpendicular to the NE-oriented σ1 driving convergence in the Southern Andes.
    Citation
    Lupi, M., Trippanera, D., Gonzalez, D., D’amico, S., Acocella, V., Cabello, C., … Tassara, A. (2020). Transient tectonic regimes imposed by megathrust earthquakes and the growth of NW-trending volcanic systems in the Southern Andes. Tectonophysics, 774, 228204. doi:10.1016/j.tecto.2019.228204
    Sponsors
    The authors thanks Cristian, Luis, and Macarena for their help while in Chile. The Seismological service of Chile and OVDAS are acknowledged for the seismic data. We thank the GIPP (Geophysical Instrument Pool Potsdam), Germany, for providing the instruments for the experiment of González-Vidal et al. (2018). The facilities of IRIS Data Management Centre were used for accessing the waveforms and related metadata used in this study. Matteo Lupi thanks SCCER-SoE and the Swiss National Science Foundation for financial support (grant NPZ00P2_154815 and PYAPP2_166900). Prof. Alessandro Tibaldi, Dr. Marco Bonini and an anonymous Reviewer reviewed this manuscript remarkably contributing to improve the study. The seismic data are stored on GFZ servers and can be requested here: https://gipp.gfz-potsdam.de/webapp/projects/view/248.
    Publisher
    Elsevier BV
    Journal
    Tectonophysics
    DOI
    10.1016/j.tecto.2019.228204
    Additional Links
    https://linkinghub.elsevier.com/retrieve/pii/S0040195119303191
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.tecto.2019.228204
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division

    entitlement

     
    DSpace software copyright © 2002-2021  DuraSpace
    Quick Guide | Contact Us | Send Feedback
    Open Repository is a service hosted by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items. For anonymous users the allowed maximum amount is 50 search results.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.