Proposed Title 1: - Queen's University

Fig. 3.6A). The Ca may result from the dissolution of Cal 5 calcite. Ttn 2 titanite and Mzn 1
monazite are intergrown with Chl 5 chlorite and U 3 uraninite in the ore assemblage and are
therefore coeval. Syn-ore Chl 5 chlorite was subsequently altered by later fluids resulting in
local Mg-enrichment and Fe-depletion that form a mosaic texture. Calculated average
formation temperatures of altered Chl 5 chlorites range from 115 o C to 240 o C (Table 3.4).
Later Chl 6 chlorite veins crosscut the mineralized granite and have higher Mg and lower
Fe contents and formation temperatures of ca. 275 o (Table 3.4).
A) B)
Ti
Early vein-type
Cl
Ca
C)
D)
Figure 3.6. Ternary and binary diagrams showing the compositional variation of chlorite
phases (in wt %) from different types of U mineralization in the Beaverlodge area.
102