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$Fayek & Kyser 2000 uraninite fractionations.pdf - Queen's University$

Sample I.D SiO 2 CaO FeO ThO 2 MnO UO 2 PbO Na 2O Y 2O 3 P 2O 5 Total Chemical Pb age C29-217A-23 0.73 2.44 0.28 0.01 0.23 85.06 6.30 0.33 0.68 0.06 96 459 C29-217A-19 0.96 6.60 0.25 0.33 0.26 80.12 2.59 0.20 0.40 0.12 92 200 C29-217A-8 0.97 3.15 0.48 0.10 0.33 83.39 6.02 0.31 0.63 0.08 95 447 C29-217A-25 0.99 1.21 0.07 0.02 0.04 85.02 5.83 0.18 0.70 0.13 94 425 C29-217A-2 1.01 2.64 0.20 0.45 0.17 83.20 6.90 0.17 0.54 0.07 95 514 C29-217A-4 1.02 5.93 0.39 0.73 0.38 83.82 2.71 0.21 0.46 0.09 96 200 C29-217A-1 1.06 3.22 0.41 0.13 0.33 83.96 6.24 0.35 0.62 0.10 96 461 C29-217A-22 1.15 5.36 0.28 0.12 0.21 86.25 2.81 0.32 0.41 0.17 97 202 C29-217A-21 1.15 5.96 0.40 0.00 0.25 85.97 2.70 0.19 0.40 0.19 97 195 C29-217A-27 1.15 1.24 0.15 0.14 0.09 86.24 5.41 0.20 0.57 0.15 95 389 C29-217A-9 1.19 3.73 0.48 0.05 0.41 82.84 5.15 0.32 0.82 0.11 95 386 C29-217A-24 1.27 5.87 0.35 0.04 0.29 84.96 2.04 0.27 0.50 0.17 96 149 C29-217A-14 1.28 3.55 0.43 0.00 0.35 83.13 6.78 0.39 0.55 0.11 97 506 C29-217A-13 1.29 2.76 0.20 0.06 0.24 77.36 10.30 0.19 0.41 0.06 93 826 C29-217A-18 3.06 6.91 0.11 0.02 0.67 83.03 1.35 0.09 0.34 0.16 96 101 C29-217A-17 5.37 6.60 0.00 0.09 0.44 80.39 2.14 0.05 0.02 0.17 95 165 C29-217A-16 6.14 6.50 0.01 0.01 0.45 79.62 2.06 0.06 0.14 0.22 95 161 C29-217A-15 13.85 3.18 0.04 0.14 0.04 56.94 10.55 0.03 0.89 0.70 86 1150 C29-217A-11 13.98 3.27 0.00 0.18 0.05 55.03 5.28 0.04 2.16 0.95 81 595 C29-217A-6 15.68 3.53 0.02 0.07 0.12 62.37 0.44 0.03 4.12 1.43 88 43 C29-217A-3 16.33 3.12 0.01 0.03 0.05 59.01 4.35 0.02 4.29 1.64 89 458 C29-217A-5 16.80 3.74 0.00 0.00 0.09 65.86 0.65 0.05 2.14 0.97 90 61 C29-217A-26 18.50 3.30 0.01 0.00 0.00 61.86 0.27 0.02 5.52 1.45 91 27 C29-217A-29 18.58 3.20 0.01 0.00 0.01 61.92 0.07 0.01 5.09 1.27 90 7 C29-217A-20 21.88 3.33 0.01 0.01 0.08 59.86 0.58 0.02 1.94 1.03 89 60 C29-217B-1 0.92 2.83 0.27 0.04 0.26 83.72 6.28 0.24 0.71 0.08 95 466 C29-217B-2 1.03 3.23 0.19 0.03 0.29 80.04 9.41 0.18 0.50 0.07 95 729 C29-217B-3 1.17 3.21 0.23 0.04 0.27 82.90 5.95 0.23 0.61 0.07 95 445 C29-217B-4 4.13 6.78 0.05 0.02 0.65 82.47 2.83 0.07 0.39 0.08 97 213 C29-217B-5 0.99 2.82 0.23 0.03 0.24 84.64 6.33 0.24 0.57 0.07 96 464 C29-217B-6 4.67 8.00 0.00 0.00 0.58 78.29 2.99 0.06 0.53 0.11 95 237 C29-217B-7 0.48 2.72 0.30 0.03 0.27 85.76 5.72 0.25 0.57 0.07 96 414 C29-217B-8 4.51 5.58 0.02 0.00 0.38 81.05 2.19 0.15 0.75 0.26 95 168 C29-217B-9 4.12 7.33 0.11 0.00 0.69 81.89 0.50 0.09 0.75 0.20 96 38 C29-217B-10 4.36 6.20 0.10 0.00 0.49 82.51 0.70 0.15 0.76 0.26 96 52 C29-217B-11 0.54 2.43 0.29 0.02 0.26 85.80 5.76 0.31 0.73 0.08 96 416 C29-217B-12 0.56 2.04 0.23 0.00 0.19 85.75 6.33 0.26 0.54 0.07 96 458 C29-217B-13 1.54 3.74 0.20 0.00 0.34 83.80 4.60 0.17 0.64 0.09 95 340 C29-217B-14 1.11 2.82 0.19 0.01 0.23 84.04 6.09 0.26 0.57 0.10 95 449 C29-217B-15 1.53 3.26 0.16 0.03 0.27 83.52 5.58 0.18 0.52 0.09 95 415 C29-217B-16 1.12 3.33 0.35 0.01 0.34 82.58 7.10 0.25 0.69 0.10 96 534 C29-217B-17 0.67 2.44 0.24 0.00 0.23 83.59 7.03 0.25 0.67 0.07 95 522 C29-217B-18 1.22 3.60 0.36 0.02 0.30 82.56 6.22 0.37 0.79 0.11 96 468 C29-217B-19 1.11 3.32 0.33 0.01 0.33 83.84 4.96 0.27 0.78 0.12 95 367 C29-217B-20 0.60 3.76 0.16 0.08 0.16 86.48 3.64 0.25 0.77 0.11 96 261 C29-217B-21 8.49 0.00 0.00 0.02 0.28 72.01 4.44 0.22 0.83 0.40 87 382 C29-217B-22 18.58 3.49 0.02 0.00 0.01 63.53 0.34 0.03 3.61 1.45 91 34 C29-217B-23 19.34 3.25 0.01 0.04 0.04 61.61 0.38 0.01 3.80 1.15 90 38 C29-217B-24 0.89 5.07 0.17 0.01 0.18 82.87 2.86 0.38 0.66 0.17 93 214 C29-217B-25 0.94 5.68 0.25 0.00 0.18 82.83 2.69 0.28 0.77 0.28 94 201 C29-217B-26 0.96 5.37 0.25 0.00 0.19 86.27 2.92 0.34 0.72 0.20 97 210 C29-217B-27 1.09 2.93 0.27 0.06 0.26 83.12 5.44 0.26 0.62 0.11 94 406 161
Sample I.D SiO 2 CaO FeO ThO 2 MnO UO 2 PbO Na 2O Y 2O 3 P 2O 5 Total Chemical Pb age C29-217B-28 1.03 2.96 0.25 0.06 0.25 83.60 5.66 0.24 0.64 0.10 95 420 C29-217B-29 0.44 2.35 0.27 0.06 0.25 84.03 6.28 0.34 0.62 0.07 95 464 C29-217B-30 0.50 2.19 0.25 0.03 0.21 82.86 5.60 0.32 0.80 0.09 93 419 C29-217B-31 2.65 4.91 0.10 0.02 0.58 81.79 3.84 0.12 0.56 0.08 95 291 Table 4.1. Results of the electron microprobe analyses for uraninite occurrences in the Coronation Hill deposit with average chemical composition and calculated chemical Pb age. The composition is reported in weight percent and the age in Ma. 4.5.2.1.2. Chlorite crystal chemistry Pre-ore Chl 1 chlorite is Mg-rich with a calculated structural formula of Mg 3.04 Al 2.53 Fe 0.47 (Si 3.3, Al 0.7 )O 10 (F 0.1 Cl 0.01 (OH) 7.89 ), corresponding to clinochlore (Deer et al., 1992). Formation temperatures are near 160°C (Table 4.2), based on site occupancy (Cathelineau, 1988). Syn-ore Chl 2 chlorite is similar in composition to pre-ore Chl 1 chlorite with a structural formula of Mg 3.26 Al 2.52 Fe 0.89 (Si 3.03, Al 0.97 )O 10 (F 0.16 Cl 0.01 (OH) 7.73 , but with formation temperatures near 250°C (Table 4.2). Post-ore Chl 3 chlorite has a structural formula of Mg 2.67 Al 2.52 Fe 0.49 (Si 3.03 Al 0.97 )O 10 (F 0.16 Cl 0.01 (OH) 15.8 ) and records formation temperatures near 100°C (Table 4.2). Chl 1 , Chl 2 and Chl 3 chlorites are low-Fe chlorite with low Fe/Fe+Mg ratios (0.14 to 0.21) and high Si contents (Table 4.2), likely reflecting the chemistry of the felsic quartz-feldspar porphyry host rock with which the hydrothermal fluid has reacted. The composition of these chlorites includes trace amounts of Mn, F, and Cl. Syn-ore Chl 2 chlorites have higher F contents (0.16 wt %; Table 4.2). 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 Oxides Wt % n=16 n=53 n=8 n=22 n=61 SiO2 33.48 30.76 35.64 26.11 28.44 TiO2 0.01 0.01 0.01 0.02 0.02 Al2O3 21.78 21.78 21.88 18.67 17.55 162
Page 1 and 2:
FLUID EVOLUTION AND STRUCTURAL CONT
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Abstract Uranium deposits associate
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Co-Authorship This thesis and the m
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Sarah Rice and Jonathan Cloutier, a
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TABLE OF CONTENTS Abstract………
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2.5.2. Temporal relationships of fa
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4.5.3. Isotopic compositions of min
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List of Figures Figure 1.1. General
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Figure 4.16. Distribution of 207 Pb
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Table 4.4. Isotopic data of the U-P
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processes by which these deposits f
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Figure 1.1. Generalized geological
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which is the equivalent of the Mill
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dolostone and carbonaceous shale (L
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Mineral Field (Figure 1.2). Many de
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2005). U mineralization is controll
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Figure 1.4. Schematic representatio
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In particular, the key issues to be
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genetic model for the U mineralizat
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fourth and most significant uranium
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The Beaverlodge area is part of the
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1998; Hartlaub and Ashton, 1998). R
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(D 1 ) produced a regional migmatit
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These previous age models do not ta
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the age when the concentrations of
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Figure 2.3. A: Detailed geologic ma
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hornblende-feldspar gneiss showing
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east-west striking en-échelon quar
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and broken Kfs 1 and Qtz 1 embedded
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A Meters LEGEND B Figure 2.6. A: De
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Figure 2.7. Microphotograph of vari
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eplaces Kfs 1 feldspars (Fig. 2.7A)
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the Qtz 1 quartz dissolution result
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Figure 2.9. Microphotograph of typi
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uraninite (Fig. 2.10). The errors o
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Figure 2.10. Backscattered Electron
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post-mineralization alteration duri
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Post-mineralization alteration even
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Volcanic-type ±U 5 (Sample 6139, G
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6134 pt8a 2 Gunnar 82.92 2.92 5.30
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Regression to zero content of the s
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faults (Fig. 2.13C). The breccias w
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Figure 2.13. Schematic cross-sectio
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Mylonites were then reactivated at
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and thrusting during the 1.94-1.92
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Beaverlodge area (Morelli et al., 2
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dikes (Ernst and Buchan, 2001b) and
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Figure 2.15: Distribution of 207 Pb
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CHAPTER 3 GENESIS OF MULTIFARIOUS U
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eccia-type. The other styles of min
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The basement consist of Neoarchean
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of essentially unmetamorphosed arko
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WDX X-ray spectrometers at Carleton
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3.4. Results 3.4.1. Paragenesis of
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are derived from their chlorite cry
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Figure 3.4. Photomicrographs of typ
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3.4J). Py 6 Pyrite and Cpy 5 chalco
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mineralization varies from 25.70 to
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6137APt71 60.67 13.73 4.59 6.48 0.0
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Fig. 3.6A). The Ca may result from
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Sample ID 1 ± 2 ± 3.a ± 4 ± 5.a
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Stable isotopic O and C composition
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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
Page 175 and 176: A Carbonaceous Shale B Src 1 Qtz 1
Page 177 and 178: A Granite Qtz 0 fragments Qtz 0 B M
Page 179: chemical composition as a result of
Page 183 and 184: site occupancy (Cathelineau, 1988).
Page 185 and 186: Mineral values Temperature Fluid va
Page 187 and 188: Corrected ratios Apparent ages ( ±
Page 189 and 190: G H Figure 4.12. U-Pb concordia dia
Page 191 and 192: Figure 4.13. Pb-Pb isochron diagram
Page 193 and 194: and 4.12B), and to 207 Pb/ 206 Pb a
Page 195 and 196: 160 o C at Coronation Hill. The tem
Page 197 and 198: Figure 4.15. Conceptual genetic mod
Page 199 and 200: of the Koolpin Formation, while dep
Page 201 and 202: at ca. 1820 Ma, approximately 40 My
Page 203 and 204: culminating with the formation of R
Page 205 and 206: deposits is related to fluids deriv
Page 207 and 208: CHAPTER 5 GENERAL DISCUSSION 5.1. I
Page 209 and 210: ed-bed strata and associated volcan
Page 211 and 212: character of the fluid that formed
Page 213 and 214: 5.2.1.2. Metamorphic-related uraniu
Page 215 and 216: during brecciation or reduction as
Page 217 and 218: ca. 1820 Ma that triggered reactiva
Page 219 and 220: Plutons Event at 1.4 Ga (Barinek et
Page 221 and 222: Kolari-Kittila Province Kuusamo Pro
Page 223 and 224: The uranium deposits in various pro
Page 225 and 226: Fig. 5.6. Distribution of the Rorai
Page 227 and 228: Roraima Basin, similar to what is o
Page 229 and 230: etween ca. 2.3 Ga and 1.9 Ga. Later
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REFERENCES Adams, J., 1989. Postgla
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Ashton, K.E., 2010. The Gunnar Mine
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Bowles, J.F.W., 1990. Age dating of
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Cuney, M.L., 2005. World-class unco
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deposits in the Athabasca Basin, Sa
Page 241 and 242:
Hartlaub, R.P., Heaman, L.M., Chack
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Saskatchewan Geological Survey, Sas
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Kyser, K., and Cuney, M., 2008. Geo
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two-sided oblique-slip collisional
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Creek Geosyncline: in ‘The minera
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Piper, J.D.A., 2004. Discussion on
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99.Sheppard SMF and Gilg HA 1996. S
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Proceedings Darwin Conference 1984
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Wingate, M.T.D, Pisarevsky SA, Evan
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Sample Deposit 207 Pb/ 206 Pb ±2σ
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Page 263 and 264:
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APPENDIX B REE contents of various
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Sample Y Zr Cs Ba Th La Ce Pr Nd Sm
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Sample ΣREE TLREE THREE LREE/HREE
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SAMPLE ID. SiO 2 TiO 2 AL 2O 3 CR 2
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SAMPLE ID. SiO 2 TiO 2 AL 2O 3 CR 2
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APPENDIX E Electron microprobe data
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SAMPLE Si 4+ AL 4+ Total AL 6+ Ti 4
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SAMPLE Si 4+ AL 4+ Total AL 6+ Ti 4
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Sample ID. Deposit UO 2 SiO 2 CaO F
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Sample ID. Deposit UO 2 SiO 2 CaO F
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Corrected ratios Apparent ages ( ±
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Corrected ratios Apparent ages ( ±
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Sample ID. Al 2O 3 CaO FeO K2O MgO
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Sample ID. Al 2O 3 CaO FeO K2O MgO
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250 85 330 40 145 70 25 65 30 30 27
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Mineralized veins Quartz veins 276
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