Proposed Title 1: - Queen's University
Proposed Title 1: - Queen's University Proposed Title 1: - Queen's University
Sample ID 3.b ± 3.c ± 3.d ± 3.e ± 4.a ± 5.b ± 5.c ± n= 5 13 5 4 6 8 6 Oxides (Wt %) SiO2 29.15 0.39 29.48 1.16 29.54 0.39 35.50 0.77 31.27 1.03 29.27 0.98 30.16 1.19 TiO2 0.01 - 0.02 - 0.01 - 0.01 - 0.03 - 0.02 - 0.02 - AL2O3 19.28 0.26 16.65 1.08 15.90 0.26 20.27 1.21 15.46 1.21 15.65 1.27 17.88 0.27 CR2O3 0.06 - 0.02 - 0.03 - 0.01 - 0.00 - 0.05 - 0.04 - FeO 15.02 1.17 16.95 3.65 18.76 1.17 4.79 2.61 12.13 1.91 23.28 3.21 23.31 0.97 MnO 0.24 0.07 0.20 - 0.05 0.02 0.26 0.07 0.16 0.06 0.26 0.08 0.19 0.06 MgO 22.38 1.27 21.74 3.76 20.61 0.32 21.33 0.90 24.25 1.31 17.56 1.79 10.79 0.71 CaO 0.03 0.01 0.03 0.03 0.01 1.03 0.62 0.14 0.05 0.11 0.08 0.30 0.05 NA2O 0.01 - 0.04 0.04 0.01 - 0.05 - 0.02 - 0.05 - 0.19 - K2O 0.01 - 0.02 - 0.02 - 0.17 - 0.01 - 0.02 - 1.09 - F 0.36 0.05 0.48 0.25 0.31 0.06 1.38 0.57 0.51 0.12 0.28 0.09 0.00 - CL 0.00 - 0.00 - 0.00 - 0.11 0.04 0.00 - 0.00 - 0.00 - H2O 11.71 0.09 11.39 0.29 11.31 0.11 11.67 0.32 11.45 0.24 11.30 0.23 11.05 0.11 O=F -0.15 - -0.20 - -0.13 - -0.59 - -0.22 - -0.03 - 0.00 - O=CL 0.00 - 0.00 - 0.00 - -0.02 - 0.00 - 0.00 - 0.00 - Total 98.10 0.41 96.99 1.30 96.44 0.73 96.04 1.51 95.21 1.90 97.61 2.10 95.01 0.36 Atomic proportion Number of O 28 28 28 28 28 28 28 Tetrahedral sites Si 4+ 2.94 0.02 3.06 0.06 3.09 0.03 3.45 0.08 3.21 0.07 3.10 0.08 3.27 0.10 AL 4+ 1.06 0.02 0.94 0.06 0.91 0.03 0.55 0.08 0.79 0.07 0.90 0.08 0.73 0.10 Total 4.00 4.00 4.00 4.00 4.00 4.00 4.00 Octahedral sites AL 6+ 2.29 0.05 2.03 0.17 1.96 0.02 2.32 0.10 1.87 0.09 1.95 0.14 2.29 0.02 Ti 4+ 0.00 - 0.00 - 0.00 - 0.00 - 0.00 - 0.00 - 0.00 - Cr 3+ 0.00 - 0.00 - 0.00 - 0.00 - 0.00 - 0.00 - 0.00 - Fe 2+ 1.27 0.11 1.47 0.35 1.64 0.08 0.39 0.21 1.04 0.17 2.06 0.31 2.12 0.11 Mn 2+ 0.02 0.01 0.02 0.02 0.00 - 0.02 - 0.01 - 0.02 - 0.02 - Mg 2+ 3.37 0.18 3.34 0.51 3.22 0.04 3.09 0.17 3.71 0.16 2.77 0.30 1.75 0.13 Total 6.96 6.85 0.05 6.83 0.05 5.82 0.19 6.63 0.10 6.81 0.13 6.18 0.22 Interlayers sites Ca 2+ 0.00 - 0.00 - 0.00 - 0.11 0.07 0.02 - 0.01 - 0.03 0.01 Na + 0.00 - 0.01 - 0.00 - 0.01 - 0.00 - 0.01 - 0.04 - K + 0.00 - 0.00 - 0.00 - 0.02 - 0.00 - 0.00 - 0.15 - Total 0.01 - 0.01 - 0.01 - 0.14 0.07 0.02 - 0.02 - 0.22 0.06 Anions F - 0.11 0.02 0.16 0.08 0.10 0.02 0.43 0.18 0.17 0.04 0.02 - 0.00 - CL - 0.00 - 0.00 - 0.00 - 0.02 - 0.00 - 0.00 - 0.00 - H + 7.89 0.02 7.84 0.08 7.90 0.02 7.56 0.18 7.83 0.04 7.98 0.06 8.00 0.06 Total 8.00 0.00 8.00 0.00 8.00 0.00 8.00 0.00 8.00 0.00 8.00 0.00 8.00 0.00 O 2- 17.89 0.02 17.84 0.08 17.90 0.02 17.56 0.18 17.83 0.04 17.98 0.06 18.00 0.00 ∑Cat 9.91 0.03 9.93 0.05 9.93 0.03 9.41 0.08 9.86 0.03 9.93 0.07 9.68 0.08 ∑ions 18.00 0.00 18.00 0.00 18.00 0.00 18.00 0.00 18.00 0.00 18.00 0.00 18.00 0.00 Temperatures ( o C) 278 7 242 20 230 8 116 24 194 23 229 25 212 32 Table 3.4. Representative electron microprobe analysis of various chlorites affected by late low-temperature alteration phases from U deposits in the Beaverlodge area, including formation temperatures (Cathelineau, 1988). 3a, 3b, 3c, 3d=altered Chl 5 in metasomatic-type U 3 mineralization at Gunnar; 4a=altered Chl 7 in breccia-type U 4 mineralization; 5b, 5c=altered Chl 8 in volcanic-type U 5 mineralization. n= number of analyses 3.4.3. Isotopic compositions of minerals and fluids involved in the U mineralization 3.4.3.1. Oxygen and carbon isotopes of Calcite 105
Stable isotopic O and C compositions were determined for calcite in textural equilibrium with uraninite for each of the U mineralization events in the Beaverlodge area (Fig. 3.7; Table 3.5). Figure 3.7. Calculated δ 18 O and δ 13 C values of mineralizing fluids in equilibrium with carbonate minerals. (Legend as in Fig. 3.8) Syn-ore Cal 6 calcite in the granite-related metasomatic-type U 3 at the Gunnar deposit has a wide range of δ 18 O values from 7.5 per mil to 22.6 per mil, but a narrow range of δ 13 C values comprising between -4.9 per mil and -3.4 per mil (Fig. 3.7; Table 3.5). Using a formation temperature of 315°C based on coeval Chl 5 chlorite, Cal 6 calcite precipitated from a CO 2 -bearing fluid having δ 18 O fluid and δ 13 C fluid values between 2.5 per mil and 17.6 per mil, and -7.1 per mil and -5.5 per mil, respectively (Fig. 3.7; Table 3.5). Syn-ore Cal 4 calcite in the early tensional vein-type U 2 mineralization has δ 18 O values 106
- Page 73 and 74: Figure 2.10. Backscattered Electron
- Page 75 and 76: post-mineralization alteration duri
- Page 77 and 78: Post-mineralization alteration even
- Page 79 and 80: Volcanic-type ±U 5 (Sample 6139, G
- Page 81 and 82: 6134 pt8a 2 Gunnar 82.92 2.92 5.30
- Page 83 and 84: Regression to zero content of the s
- Page 85 and 86: faults (Fig. 2.13C). The breccias w
- Page 87 and 88: Figure 2.13. Schematic cross-sectio
- Page 89 and 90: Mylonites were then reactivated at
- Page 91 and 92: and thrusting during the 1.94-1.92
- Page 93 and 94: Beaverlodge area (Morelli et al., 2
- Page 95 and 96: dikes (Ernst and Buchan, 2001b) and
- Page 97 and 98: Figure 2.15: Distribution of 207 Pb
- Page 99 and 100: CHAPTER 3 GENESIS OF MULTIFARIOUS U
- Page 101 and 102: eccia-type. The other styles of min
- Page 103 and 104: The basement consist of Neoarchean
- Page 105 and 106: of essentially unmetamorphosed arko
- Page 107 and 108: WDX X-ray spectrometers at Carleton
- Page 109 and 110: 3.4. Results 3.4.1. Paragenesis of
- Page 111 and 112: are derived from their chlorite cry
- Page 113 and 114: Figure 3.4. Photomicrographs of typ
- Page 115 and 116: 3.4J). Py 6 Pyrite and Cpy 5 chalco
- Page 117 and 118: mineralization varies from 25.70 to
- Page 119 and 120: 6137APt71 60.67 13.73 4.59 6.48 0.0
- Page 121 and 122: Fig. 3.6A). The Ca may result from
- Page 123: Sample ID 1 ± 2 ± 3.a ± 4 ± 5.a
- Page 127 and 128: Sample ID Deposit Mineral Mineral v
- Page 129 and 130: equilibrium with a fluid having δ
- Page 131 and 132: Syn-ore Chl 8 chlorite sampled from
- Page 133 and 134: Figure 3.9. Binary diagrams showing
- Page 135 and 136: Figure 3.10. Chondrite-normalized R
- Page 137 and 138: Retrograde metamorphism Early vein
- Page 139 and 140: contents in syn-ore Chl 4 chlorite
- Page 141 and 142: decompression and hydration reactio
- Page 143 and 144: mineralizations, which upgraded the
- Page 145 and 146: metamorphic origin of the main U 4
- Page 147 and 148: y the abundance of Ap 1 apatite and
- Page 149 and 150: of late fluid events that have affe
- Page 151 and 152: CHAPTER 4 FLUID EVOLUTION AND GENES
- Page 153 and 154: 1990, 1991; Wyborn et al., 1990). H
- Page 155 and 156: stable isotope geochemistry, U-Pb g
- Page 157 and 158: coincident with the initiation of s
- Page 159 and 160: plasma mass spectrometry (LA-HR-ICP
- Page 161 and 162: The Coronation Hill deposit occupie
- Page 163 and 164: arsenides, nickel selenide and copp
- Page 165 and 166: No corrections were made to the 238
- Page 167 and 168: which was interpreted as being asso
- Page 169 and 170: porphyry and coated by Chl 1 formin
- Page 171 and 172: Mineralized breccias showing quartz
- Page 173 and 174: SOUTH ALLIGATOR RIVER GROUP EL SHER
Stable isotopic O and C compositions were determined for calcite in textural<br />
equilibrium with uraninite for each of the U mineralization events in the Beaverlodge area<br />
(Fig. 3.7; Table 3.5).<br />
Figure 3.7. Calculated δ 18 O and δ 13 C values of mineralizing fluids in equilibrium with<br />
carbonate minerals. (Legend as in Fig. 3.8)<br />
Syn-ore Cal 6 calcite in the granite-related metasomatic-type U 3 at the Gunnar<br />
deposit has a wide range of δ 18 O values from 7.5 per mil to 22.6 per mil, but a narrow<br />
range of δ 13 C values comprising between -4.9 per mil and -3.4 per mil (Fig. 3.7; Table<br />
3.5). Using a formation temperature of 315°C based on coeval Chl 5 chlorite, Cal 6 calcite<br />
precipitated from a CO 2 -bearing fluid having δ 18 O fluid and δ 13 C fluid values between 2.5 per<br />
mil and 17.6 per mil, and -7.1 per mil and -5.5 per mil, respectively (Fig. 3.7; Table 3.5).<br />
Syn-ore Cal 4 calcite in the early tensional vein-type U 2 mineralization has δ 18 O values<br />
106
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