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

anging between 15.5 per mil and 24.1 per mil and δ 13 C values ranging from -2.4 per mil to -2.1 per mil (Fig. 3.7; Table 3.5). Assuming a formation temperature of 300°C based on coeval Chl 4 chlorite (Table 3.3), Cal 4 formed from fluids with δ 18 O fluid values varying between 10.2 and 18.8 per mil and δ 13 C fluid values between -4.6 per mil and -4.2 per mil (Fig. 3.7; Table 3.5). Sample ID Deposit Mineral Mineral values Temperatures Fluid values δ 18 O V-SMOW per mil δ 13 C V-PDB per mil o C δ 18 O fluid V-SMOW per mil δ 13 C fluid V-PDB per mil Metasomatic-type U 3 mineralization 6134 Gunnar Dolomite-Calcite 22.6 -4.9 315 17.6 -7 6134D Gunnar Dolomite-Calcite 22.5 -4.9 315 17.5 -7.1 GN-03 Gunnar Calcite 7.5 -3.9 315 2.5 -6 GN-03D Gunnar Calcite 7.6 -3.8 315 2.6 -5.9 VR-190 Gunnar Calcite 12.5 -3.4 315 7.5 -5.5 VR-190D Gunnar Calcite 12.6 -3.4 315 7.6 -5.6 Early tensional vein-type U 2 mineralization 6120 Ace-Fay MG-Calcite 15.5 -2.2 310 10.2 -4.3 6120 DUP Ace-Fay MG-Calcite 15.6 -2.1 310 10.3 -4.2 6120D Ace-Fay MG-Calcite 15.5 -2.2 310 10.3 -4.3 C-22-111 Cinch Lake Dolomite-Calcite 21.3 -2.2 310 16 -4.3 C-22-93 Cinch Lake Dolomite 24.1 -2.4 310 18.8 -4.5 M51-5996-VEIN Cinch Lake Dolomite 16.9 -2.5 310 11.7 -4.6 Breccia-type U 4 mineralization 5799 Ace-Fay Calcite 10.9 -2.4 330 6.2 -4.9 5810 Ace-Fay Calcite 10.8 -4.5 330 6 -6.9 5812 Ace-Fay Dolomite-Calcite 12.1 -2.5 330 7.3 -4.9 5812D Ace-Fay Dolomite-Calcite 12.2 -2.3 330 7.4 -4.8 5812-1 Ace-Fay Dolomite 11.9 -1.6 330 7.1 -4 5800A Ace-Fay Dolomite-Calcite 12.3 -2.9 330 7.6 -5.3 5800B Ace-Fay Dolomite-Calcite 12.2 -2.9 330 7.5 -5.4 C-16-285 Cinch Lake MG-Calcite 10.6 -2.2 330 5.9 -4.6 C-22-128 Cinch Lake Calcite 13.3 -2.6 330 8.5 -5 C-22-128D Cinch Lake Calcite 13.3 -2.3 330 8.5 -4.8 C-27-198 Cinch Lake Calcite 13.3 -1.8 330 8.5 -4.2 C-27-200 Cinch Lake MG-Calcite 10.6 -2.5 330 5.9 -4.9 C-27-200D Cinch Lake Calcite 10.9 -2.4 330 6.1 -4.8 C-27-373 Cinch Lake Calcite 9.8 -2.2 330 5.1 -4.6 C-27-379 Cinch Lake Calcite 12.3 -3.8 330 7.6 -6.2 C-42-167 Cinch Lake MG-Calcite 12 -2.6 330 7.2 -5 C-42-167D Cinch Lake MG-Calcite 11.9 -2.4 330 7.2 -4.9 C-42-191 Cinch Lake Calcite 14.4 -2.1 330 9.6 -4.6 C-42-191D Cinch Lake Calcite 14.5 -2.3 330 9.7 -4.7 M51-5996-MAT Cinch Lake Dolomite 22.2 -1.8 330 17.4 -4.2 M51-5996-MAT-D Cinch Lake Dolomite 22.1 -1.7 330 17.4 -4.2 VR Ace-Fay Calcite 12.9 -3.2 330 8.1 -5.6 VR_D Ace-Fay Calcite 12.9 -3.4 330 8.2 -5.8 VR-211 Ace-Fay Calcite 7.6 -4 330 2.8 -6.4 VR79 Ace-Fay Calcite 10.7 -5.8 330 5.9 -8.3 VR79D Ace-Fay Calcite 10.6 -5.8 330 5.9 -8.2 Volcanic-type U 5 mineralization 6122 Ace-Fay Dolomite 13.2 -1.1 320 8.1 -3.2 6122D Ace-Fay Dolomite 13.4 -1.1 320 8.2 -3.3 6139 Ace-Fay Dolomite 13.9 -1.2 320 8.7 -3.4 6139D Ace-Fay Dolomite 13.9 -1.2 320 8.7 -3.4 C-27-23 Cinch Lake Dolomite 20.8 -2.6 320 15.7 -4.7 C-27-262 Cinch Lake Calcite 9.8 -2.4 320 4.7 -4.6 C-27-319 Cinch Lake MG-Calcite 11.6 -2.7 320 6.4 -4.9 107
Sample ID Deposit Mineral Mineral values Temperatures Fluid values δ 18 O V-SMOW per mil δ 13 C V-PDB per mil o C δ 18 O fluid V-SMOW per mil δ 13 C fluid V-PDB per mil C-27-319D Cinch Lake MG-Calcite 11.4 -2.6 320 6.3 -4.7 C-37-28 Cinch Lake Calcite 12.7 -1.7 320 7.5 -3.8 C-42-180 Cinch Lake Calcite 12.8 -2.1 320 7.6 -4.2 C-42-180D Cinch Lake Calcite 12.6 -1.9 320 7.5 -4.1 C-42-244-1 Cinch Lake Calcite 10.5 -1.9 320 5.4 -4.1 Athabasca-type U 6 mineralization 3705 Ace-Fay Dolomite 11.2 -1 235 3.3 -1.9 3705-D Ace-Fay Dolomite 11.2 -0.9 235 3.3 -1.9 Late calcite veins C-09-181 Cinch Lake Calcite 14.6 -2.5 140 1.2 -0.5 C-16-220 Cinch Lake Calcite 12.8 -2.8 140 -0.6 -0.8 C-42-244 Cinch Lake Calcite 13.4 -6.4 140 0.02 -4.5 C-42-244D Cinch Lake Calcite 13.3 -6.5 140 -0.1 -4.6 Table 3.5. Measured δ 18 O and δ 13 C for calcite and calculated δ 18 O fluid and δ 13 C fluid values for fluids in equilibrium with carbonate minerals for different generations of U mineralization in the Beaverlodge area. Paragenesis of all phases analyzed is shown in Figures 3.3 and 3.4 and data are plotted in Figure 3.8 (see the text for more details). Syn-ore Cal 8 calcite in the major breccia-type U 4 yields a wide range of δ 18 O values between 7.6 per mil and 22.2 per mil and δ 13 C values between -5.8 per mil and -1.6 per mil (Table 3.5). These values are similar to O and C isotopic compositions of calcite matrix from mineralized breccia reported by Tortosa (1983) at the Cenex deposit and to values reported by Sassano (1972) for the type-C calcite in the Ace-Fay deposit that he interpreted as syn-ore calcite-filling breccia. A formation temperature of 330°C was used to calculate δ 18 O fluid and δ 13 C fluid values, which range from 2.8 per mil to 17.4 per mil and -8.3 per mil to -4 per mil, respectively (Fig. 3.7; Table 3.5). The lowest δ 13 C fluid values (Fig. 3.7) likely reflect the influence of a reduced C source probably originating from the country rock with which the fluid has interacted (Fig. 3.7). Syn-ore Cal 9 calcite sampled from the volcanic-type U 5 mineralization has δ 18 O values ranging from 9.8 per mil to 20.8 per mil and δ 13 C values between -2.7 per mil and - 1.1 per mil (Table 3.5). Using a formation temperature of 320°C (Table 3.3), the 108
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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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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 and 124: Sample ID 1 ± 2 ± 3.a ± 4 ± 5.a
Page 125: Stable isotopic O and C composition
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
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A Granite Qtz 0 fragments Qtz 0 B M
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chemical composition as a result of
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Sample I.D SiO 2 CaO FeO ThO 2 MnO
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site occupancy (Cathelineau, 1988).
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Mineral values Temperature Fluid va
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Corrected ratios Apparent ages ( ±
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G H Figure 4.12. U-Pb concordia dia
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Figure 4.13. Pb-Pb isochron diagram
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and 4.12B), and to 207 Pb/ 206 Pb a
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160 o C at Coronation Hill. The tem
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Figure 4.15. Conceptual genetic mod
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of the Koolpin Formation, while dep
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at ca. 1820 Ma, approximately 40 My
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culminating with the formation of R
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deposits is related to fluids deriv
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CHAPTER 5 GENERAL DISCUSSION 5.1. I
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ed-bed strata and associated volcan
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character of the fluid that formed
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5.2.1.2. Metamorphic-related uraniu
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during brecciation or reduction as
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ca. 1820 Ma that triggered reactiva
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Plutons Event at 1.4 Ga (Barinek et
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Kolari-Kittila Province Kuusamo Pro
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The uranium deposits in various pro
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Fig. 5.6. Distribution of the Rorai
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Roraima Basin, similar to what is o
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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
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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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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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