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    Reflection seismic imaging of the upper crust in the Kristineberg mining area, northern Sweden

    Access Status
    Fulltext not available
    Authors
    Dehghannejad, M.
    Juhlin, Christopher
    Malehmir, A.
    Skyttä, P.
    Weihed, P.
    Date
    2010
    Type
    Journal Article
    
    Metadata
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    Citation
    Dehghannejad, M. and Juhlin, C. and Malehmir, A. and Skyttä, P. and Weihed, P. 2010. Reflection seismic imaging of the upper crust in the Kristineberg mining area, northern Sweden. Journal of Applied Geophysics. 71 (4): pp. 125-136.
    Source Title
    Journal of Applied Geophysics
    DOI
    10.1016/j.jappgeo.2010.06.002
    ISSN
    0926-9851
    School
    Department of Exploration Geophysics
    URI
    http://hdl.handle.net/20.500.11937/9799
    Collection
    • Curtin Research Publications
    Abstract

    The Kristineberg mining area is located in the western part of the Palaeoproterozoic Skellefte Ore District, one of the most important mining districts in Europe. As a part of a 3D geologic modeling project, two new reflection seismic profiles were acquired with a total length of about 20. km. One profile (HR), parallel to previous seismic profiles, was acquired using a 10. m receiver and source interval and crosses the steeply dipping structures of the Kristineberg mine. The other profile (Profile 2) runs perpendicular to all existing profiles in the area. Although the structural geology is complex, the processed seismic data reveal a series of steeply dipping to sub-horizontal reflections, some of which reach the surface and allow correlation with surface geology. Our general interpretation of the seismic images is that the Kristineberg mine and associated mineral horizon are located in the northern part of a series of steeply south dipping structures. Overall, main structures plunge to the west at about 30°-40°. Cross-dip analysis and reflection modeling were carried out to obtain the 3D orientation of the main reflections and to provide insight into the possible contribution of out-of-the-plane reflections. This helped, for example, to obtain the 3D geometry of a deep reflection that was previously interpreted as structural basement to volcanic rocks. The new reflection seismic profiles have improved our understanding of shallow geological structures in the area and in conjunction with recently acquired potential field data, magnetotelluric data and geological observations will help to refine previous 3D geologic modeling interpretations that were aimed at larger scale structures. © 2010 Elsevier B.V.

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