• Libraries
    • Log in to:
    View Item 
    •   MSpace Home
    • Faculty of Graduate Studies (Electronic Theses and Practica)
    • FGS - Electronic Theses and Practica
    • View Item
    •   MSpace Home
    • Faculty of Graduate Studies (Electronic Theses and Practica)
    • FGS - Electronic Theses and Practica
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Sedimentology and diagenesis of the Bakken Formation in Daly Field, southwest Manitoba

    Thumbnail
    View/Open
    Edwards, Sedimentology and.pdf (11.19Mb)
    Date
    1993
    Author
    Edwards, W. Ward
    Metadata
    Show full item record
    Abstract
    The Bakken Formation (Devonian-Mississippian) is a relatively thin unit that can be found throughout the Wiltiston Basin. The unit consists of upper and lower black, organic-rich shales separated by a calcareous siltstone. These units have been informally defined as the Upper, Lower, and Middle Bakken respectively. In the Daly field, southwestern Manitoba, the Lower Bakken is absent and the Middle Bakken has a sharp erosional contact with the underlying Devonian Lyleton Formation. The Upper Bakken has a conformable contact with the overlying Mississippian Lodgepole Formation. The Middle Bakken is subdivided into three subunits: 1) the Massive Unit, 2) the Horizontal Laminated Unit, and 3) the Wavy Laminated Unit. These subunits are composed mainly of quartz, dolomite, and clay minerals, with variable amounts of anhydrite, gypsum, K-feldspar, pyrite, plagioclase, calcite, and halite. The amount of quartz decreases upwards in the section whereas the clay mineral content increase. The Bakken Formation was deposited on a shallow marine, non-barred, low wave energy shoreline. The Lower Bakken was deposited during a transgression and then later eroded from the Daly field area during a period of regression. The Middle and Upper Bakken were then deposited during a subsequent transgression. After deposition, the Bakken Formation experienced a series of chemical diagenetic changes. Shortly after deposition, there was the formation of authigenic pyrite and dolomite which was later followed by the formation of authigenic illite and the dissolution of detrital K-feldspar. Later in diagenesis, there was continued formation of authigenic illite and formation of quartz overgrowths on detrital quartz grains. Somewhat later in diagenesis illite stopped precipitating and authigenic K-feldspar precipitation occurred. Towards the end of the diagenetic history of the Bakken Formation there was formation of coarsely crystalline, pore-lining dolomite, conversion of pyrite into hematite, and precipitation of anhydrite, gypsum, and halite.
    URI
    http://hdl.handle.net/1993/3711
    Collections
    • FGS - Electronic Theses and Practica [25494]
    • Manitoba Heritage Theses [6053]

    DSpace software copyright © 2002-2016  DuraSpace
    Contact Us | Send Feedback
    Theme by 
    Atmire NV
     

     

    Browse

    All of MSpaceCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    My Account

    Login

    Statistics

    View Usage Statistics

    DSpace software copyright © 2002-2016  DuraSpace
    Contact Us | Send Feedback
    Theme by 
    Atmire NV