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    The Krasnouralsky profile in the Middle Urals, Russia: A tomographic approach to vintage DSS data

    Access Status
    Fulltext not available
    Authors
    Kashubin, A.
    Tryggvason, A.
    Juhlin, Christopher
    Rybalka, A.
    Kashubina, T.
    Shkred, I.
    Date
    2009
    Type
    Journal Article
    
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    Citation
    Kashubin, A. and Tryggvason, A. and Juhlin, C. and Rybalka, A. and Kashubina, T. and Shkred, I. 2009. The Krasnouralsky profile in the Middle Urals, Russia: A tomographic approach to vintage DSS data. Tectonophysics. 472 (1-4): pp. 249-263.
    Source Title
    Tectonophysics
    DOI
    10.1016/j.tecto.2008.08.026
    ISSN
    0040-1951
    School
    Department of Exploration Geophysics
    URI
    http://hdl.handle.net/20.500.11937/45296
    Collection
    • Curtin Research Publications
    Abstract

    The Middle Urals region has been widely studied with geophysical methods over the past decades. An integrated program is in progress to summarize this knowledge, including modern reprocessing of controlled-source seismic data. This work is devoted to the Krasnouralsky DSS profile. We applied modern tomography inversion algorithms in 2D and 2.5D on first break traveltime picks from an archive catalogue. A number of initial models and various smoothing constraints were used to investigate the influence of starting models on the final model. Robustness and uncertainty of the recovered models were estimated with hypothesis testing and checkerboard tests. The recovered velocity structure shows a thicker crust below the contact of the West Uralian Zone and the Central Uralian Zone and below the Tagil-Magnitogorsk Zone. Deep high velocity anomalies on both sides of this zone are interpreted as crustal thinning or alteration of the crust by intrusions of mantle material. Our results suggest that it is worthwhile reinterpreting DSS traveltime data with modern inversion techniques. © 2008 Elsevier B.V. All rights reserved.

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