• 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.

    A petrofabric study of the Falcon Lake stock, Eastern Manitoba

    Thumbnail
    View/Open
    Haugh, A Petrofabric Study.pdf (3.799Mb)
    Date
    1963
    Author
    Haugh, Ian.
    Metadata
    Show full item record
    Abstract
    An investigation has been carried out to determine the degree of preferred orientation shown by both plagioclase and quartz crystals in rocks from the eastern half of the Falcon Lake Stock. For the plagioclase crystals, the orientation of the (O1O) composition planes of albite twinning was determined. These (O1O) planes, parallel to the largest faces of the lath-shaped crystals, were found to show a strongly preferred orientation. This planar parallelism has been related to alignment of the crystals in primary flow layers within the stock. The flow layers in the quartz monzonite core were found to be steeply inclined, possibly as a result of re-orientation of a pre-existing plagioclase "mesh" by upward streaming of an acidic differentiate; the mechanism suggested Brownell (1941) to explain the formation of the core. In the outer parts of the stock, there appears to be an arch of flow layers. A close relationship has been found to exist between the orientation of the quartz c-axes and the inferred attitudes of the flow layers. In general the majority of the quartz axes are consistently contained within the plane of the flow layers and most of the axes are also horizontal. It is suggested that the quartz grains assumed their preferred orientation as they crystallized, in response to a prolongation of the forces which originally propelled the magma upwards. It would appear that their orientation was also influenced by the pre-existing framework of plagioclase crystals which had already been aligned within parallel flow layers.
    URI
    http://hdl.handle.net/1993/3386
    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