Proposed Title 1: - Queen's University

1.1). In the South Alligator Valley area, research is focused on the Coronation Hill and El
Sherana deposits, the largest deposits of their type in the area (Fig. 1.2, Table 1.2).
1.6. Thesis Structure
The results of this research are presented in three manuscripts (Chapters 2 to 4).
Chapter 2 (accepted pending moderate revisions in Precambrian Research) details
the timing of deformation, fluid flow and uranium mineralization in the Beaverlodge area.
U-Pb geochronology of uraninite from various uranium deposits, together with
petrographic and structural analysis along the Main Ore shear zone at the Cinch Lake
deposit and the Saint Louis fault at the Ace Fay deposit, are used to constrain the timing of
deformation and fluid events and to clarify the relationship between fault activity and
uranium mineralization. Ages of the uranium mineralization and late alteration events that
affected them are used to correlate the chronology of fault activity and uranium
mineralization to major thermotectonic events associated with the evolution of the North
American shield.
Chapter 3 (accepted pending moderate revisions to Economic Geology) evaluates the
character and formation of the fluids that formed uranium deposits in the Beaverlodge area
and determines key geochemical factors that control uranium mineralization. A mineral
paragenesis that details the relative timing of alteration minerals is presented. Stable isotope
geochemistry, rare earth element contents in uraninite and mineral crystal chemistry are
used to constrain the nature and origin of fluids. These results are used to identify key
factors controlling uranium mineralization in deposits of the Beaverlodge area, present a
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