• Login
    View Item 
    •   Home
    • University of Alaska Fairbanks
    • UAF Graduate School
    • Geosciences
    • View Item
    •   Home
    • University of Alaska Fairbanks
    • UAF Graduate School
    • Geosciences
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of Scholarworks@UACommunitiesPublication DateAuthorsTitlesSubjectsTypeThis CollectionPublication DateAuthorsTitlesSubjectsType

    My Account

    Login

    First Time Submitters, Register Here

    Register

    Statistics

    Display statistics

    A breccia-centered ore and alteration model for the Copper Canyon alkalic Cu-Au porphyry deposit, British Columbia

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    Twelker_E_2007.pdf
    Size:
    139.9Mb
    Format:
    PDF
    Description:
    Thesis
    Download
    Thumbnail
    Name:
    Appendices_F_G_Twelker_E_2007.zip
    Size:
    3.240Mb
    Format:
    Unknown
    Download
    Author
    Twelker, Evan
    Metadata
    Show full item record
    URI
    http://hdl.handle.net/11122/6987
    Abstract
    Similar to the nearby Galore Creek deposit, the Copper Canyon prospect of northwestern British Columbia is a porphyry-type copper-gold-silver occurrence associated with alkalic intrusive rocks of the Late Triassic-Early Jurassic Copper Mountain Suite. A reevaluation of the prospect geology shows that, of the previously recognized orthoclase and/or pseudoleucite porphyry syenite intrusions, mineralization is spatially and temporally associated with a single intrusive phase (unit i5) and biotite-garnet stockworks. Further, a newly defined unit of pre-mineralization magmatic-hydrothermal intrusive breccia occupies the core of the prospect and is a favorable host for much of the prospect mineralization. Prospect alteration can be divided into two distinct styles. Calc-potassic alteration consists of K-feldspar, Mg and Fe³-rich (An₂₀) biotite, andradite-rich garnet, hematite, magnetite, chalcopyrite, pyrite, and sphalerite (Zn₉₄₋₉₉, Fe₀.₅₋₂, Cd₀.₄₋₁)S and is associated with copper-gold-silver mineralization. Ankerite-sericite-pyrite (± fluorite, albite, anhydrite, pyrite, and trace covellite and bornite) alteration adjoins this core, hosting gold mineralization and insignificant copper. Sulfide-electrum and biotite geothermometry suggest fluid temperatures decreasing from the core (<̲S 550°C) to distal gold mineralization (<̲361°C). Distal gold mineralization is most likely the result of higher than typical sulfur activity and bisulfide transport of gold.
    Description
    Thesis (M.S.) University of Alaska Fairbanks, 2007
    Date
    2007-08
    Type
    Thesis
    Collections
    Geosciences

    entitlement

     
    ABOUT US|HELP|BROWSE|ADVANCED SEARCH

    The University of Alaska Fairbanks is an affirmative action/equal opportunity employer and educational institution and is a part of the University of Alaska system.

    ©UAF 2013 - 2023 | Questions? ua-scholarworks@alaska.edu | Last modified: September 25, 2019

    Open Repository is a service operated by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.