Proposed Title 1: - Queen's University

Coronation Hill Deposit
El Sherana Deposit
Pre-Ore Chl 1 Ore Stage Chl 2 Post-Ore Chl 3 Pre-Ore Chl 1 Ore Stage Chl 2
FeO 5.63 10.68 5.97 34.40 35.83
MnO 0.08 0.08 0.20 0.01 0.01
MgO 20.74 22.23 18.28 9.15 10.48
CaO 0.50 0.07 0.20 0.02 0.03
Na2O 0.05 0.02 0.05 0.02 0.02
K2O 0.40 0.05 0.72 0.03 0.02
F 0.25 0.39 0.23 0.13 0.16
Cl 0.05 0.03 0.04 0.01 0.02
H2O* 11.91 11.81 12.03 10.81 11.29
Total 94.87 97.93 95.23 99.38 103.86
Atomic proportion
Number of O 28.00 28.00 28.00 28.00 28.00
Tetrahedral sites
Si 3.30 3.03 3.49 2.86 2.98
Al iv 0.70 0.97 0.51 1.14 1.02
Total 4.00 4.00 4.00 4.00 4.00
Octahedral sites
Al vi 2.53 2.52 2.52 2.41 2.17
Ti 0.00 0.00 0.00 0.00 0.00
Fe2+ 0.47 0.89 0.49 3.15 3.14
Mn 0.01 0.01 0.02 0.00 0.00
Mg 3.04 3.26 2.67 1.50 1.64
Interlayers sites
Ca 0.05 0.01 0.02 0.00 0.00
Na 0.01 0.00 0.01 0.00 0.00
K 0.05 0.01 0.09 0.00 0.00
Total 0.11 0.02 0.12 0.01 0.01
Anions
O=F 0.10 0.16 0.10 0.06 0.07
0=Cl 0.01 0.01 0.01 0.00 0.01
OH* 15.67 15.51 15.70 15.81 15.78
Total 25.94 26.37 25.62 26.94 26.80
Fe/Fe+Mg 0.14 0.21 0.16 0.68 0.66
Temperatures o C 163 252 103 305 266
Table 4.2. Representative electron microprobe analyses of various chlorite phases from the
Coronation Hill and El Sherana deposits, including formation temperatures calculated using
the method of Cathelineau (1988). Calculated temperatures are accurate to 30°C based on
replicate analyses.
4.5.2.2. El-Sherana Uranium deposit
Pre-ore alteration Chl 1 chlorite is an Fe-chlorite with a calculated structural formula
of Fe 3.45 Mg 1.5 Al 2.41 (Si 2.86, Al 1.14 )O 10 (F 0.06 (OH) 7.94 ), reflecting the composition of chamosite
(Deer et al., 1992). Calculated formation temperatures are near 300°C (Table 4.2), based on
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