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    Fault-hosted AU mineralization, Ester Dome, Alaska

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    Cameron_C_2000.pdf
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    Description:
    Thesis
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    Author
    Cameron, Cheryl E.
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    URI
    http://hdl.handle.net/11122/6952
    Abstract
    The Rhyolite gold prospect near Fairbanks, Alaska, appears to be different from most intrusion-related Au depositions within the Fairbanks area (e.g., Ryan Lode and Fort Knox), as it is located along a low-angle fault and is spatially associated with a quartz monozonite sill. A 1:60,000 scale geologic map was prepared using soil samples, airborne geophysical data, and mapping based on core and surface samples collected during 1998 and 1999. Mineralization does not appear to be temporally related to the quartz-monzodiorite sill, although mineralized fluids apparently used the sill as a pathway. ⁴⁰Ar/³⁹Ar dates of chloritized biotite from the intrusive (>75 Ma), sericite in mineralized gouge (9̃0 Ma), and white micas from metamorphic rocks (1̃00 Ma) correlate with dates from other plutonic-related deposits in the Fairbanks area ... Au-Ag, Au-Bi, and Au-As ratios suggest that the Rhyolite prospect is intrusion-related but distal to the causative body.
    Description
    Thesis (M.S.) University of Alaska Fairbanks, 2000
    Table of Contents
    1. Introduction and geologic setting -- 2. Lithologies and rock units of Ester Dome -- 3. Petrology of Ester Dome rocks -- 4. Factor and cluster analysis of soil samples -- 5. Constructing an improved geologic map -- 6. Radiometric dating -- 7. Mineralization -- Discussion and interpretation -- Conclusion -- References cited.
    Date
    2000-12
    Type
    Thesis
    Collections
    Geosciences

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