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    Experimental study of the interplay between magmatic rift intrusion and flank instability with application to the 2001 Mount Etna eruption

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    Corvec_et_al-2014-Journal_of_Geophysical_Research__Solid_Earth.pdf
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    Type
    Article
    Authors
    Le Corvec, Nicolas
    Walter, Thomas R.
    Ruch, Joel
    Bonforte, Alessandro
    Puglisi, Giuseppe
    KAUST Department
    Physical Science and Engineering (PSE) Division
    Date
    2014-07-10
    Online Publication Date
    2014-07-10
    Print Publication Date
    2014-07
    Permanent link to this record
    http://hdl.handle.net/10754/347006
    
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    Abstract
    Mount Etna volcano is subject to transient magmatic intrusions and flank movement. The east flank of the edifice, in particular, is moving eastward and is dissected by the Timpe Fault System. The relationship of this eastward motion with intrusions and tectonic fault motion, however, remains poorly constrained. Here we explore this relationship by using analogue experiments that are designed to simulate magmatic rift intrusion, flank movement, and fault activity before, during, and after a magmatic intrusion episode. Using particle image velocimetry allows for a precise temporal and spatial analysis of the development and activity of fault systems. The results show that the occurrence of rift intrusion episodes has a direct effect on fault activity. In such a situation, fault activity may occur or may be hindered, depending on the interplay of fault displacement and flank acceleration in response to dike intrusion. Our results demonstrate that a complex interplay may exist between an active tectonic fault system and magmatically induced flank instability. Episodes of magmatic intrusion change the intensity pattern of horizontal flank displacements and may hinder or activate associated faults. We further compare our results with the GPS data of the Mount Etna 2001 eruption and intrusion. We find that syneruptive displacement rates at the Timpe Fault System have differed from the preeruptive or posteruptive periods, which shows a good agreement of both the experimental and the GPS data. Therefore, understanding the flank instability and flank stability at Mount Etna requires consideration of both tectonic and magmatic forcing. Key Points Analyzing Mount Etna east flank dynamics during the 2001 eruption Good correlation between analogue models and GPS data Understanding the different behavior of faulting before/during/after an eruption © 2014. American Geophysical Union. All Rights Reserved.
    Citation
    Experimental study of the interplay between magmatic rift intrusion and flank instability with application to the 2001 Mount Etna eruption 2014, 119 (7):5356 Journal of Geophysical Research: Solid Earth
    Publisher
    American Geophysical Union (AGU)
    Journal
    Journal of Geophysical Research: Solid Earth
    DOI
    10.1002/2014JB011224
    Additional Links
    http://doi.wiley.com/10.1002/2014JB011224
    ae974a485f413a2113503eed53cd6c53
    10.1002/2014JB011224
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division

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