Proposed Title 1: - Queen's University

calculated δ 18 O fluid and δ 13 C fluid values of the fluid from which Cal 9 formed range from 4.7
per mil to 15.7 per mil and -4.9 per mil to -3.1 per mil, respectively (Fig. 3.7; Table 3.5),
with most of the δ 18 O fluid values between 5 per mil and 10 per mil. Syn-ore Cal 10 calcite
from the Athabasca-type U 6 mineralization yields δ 18 O values of 11.2 per mil and δ 13 C
values ranging from -1 per mil to -0.9 per mil (Table 3.5). Using a formation temperature
of ca. 235°C (Table 3.3), the calculated δ 18 O fluid and δ 13 C fluid values of the fluid are 3.3 per
mil and -1.9 per mil, respectively (Fig. 3.7; Table 3.5). Late Cal 11 calcite veins
crosscutting all rocks within the Beaverlodge area have δ 18 O values that range from 12.8
per mil to 14.7 per mil and δ 13 C values between -6.4 per mil and -2.5 per mil (Fig. 3.7;
Table 3.5). Using a formation temperature of 140°C, the calculated δ 18 O fluid and δ 13 C fluid
values are the lowest and give two components (Fig. 3.7). One has δ 18 O fluid and δ 13 C fluid
values ranging from -0.6 per mil to 1.2 per mil and -0.9 per mil to -0.5 per mil,
respectively, similar to isotopic compositions of seawater (Fig. 3.7). The second
component has much lower δ 13 C fluid and slightly higher δ 18 O fluid values, near -4.5 per mil
and 0 per mil, respectively.
3.4.3.2. Oxygen and hydrogen isotopic compositions of chlorite
Stable isotopic O and H compositions were determined for chlorite in textural
equilibrium with U for the granite-metasomatic, breccia, volcanic, and Athabasca-type U
mineralizations (Fig. 3.8; Table 3.6).
Syn-ore Chl 5 chlorite in the Gunnar deposit has δ 18 O values that range from 5.8 per
mil to 11.1 per mil and δ 2 H values between -75 per mil and -71 per mil (Fig. 3.8; Table
3.6). Assuming a formation temperature of 315°C (Table 3.3), Chl 5 chlorite formed in
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