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

1 cm to 10’s of cm. Fragments of the breccia are highly variable-sized (1 mm to 5 cm) and consist of angular country-rock clasts embedded in a chlorite-rich matrix (Fig. 2.5K). The contact between breccia-dikes and the host rock is sharp. A close spatial relationship is observed between mafic dikes and breccia-dikes. Late Chl 10 chlorite, Cal 11 calcite veins, and Qtz 5 quartz (Fig. 2.5L) crosscut all rock types and are parallel to the set of joints. 2.4.2. The Saint Louis fault 2.4.2.1. Geology of the Ace-Fay-Verna deposits The deposits are located along the Saint Louis fault (Fig. 2.2), which strikes northeast and dips 50 o southeast (Fig. 2.6). The Ace and Fay ore bodies are located in the footwall, whereas Verna is in the hanging wall. Sassano (1972) described four units that host the uranium mineralization named the Fay Mine Complex comprising from oldest to youngest: quartzite and conglomerates, phyllonite amphibolite, albite paragneiss and granitic gneiss. These rocks overlie the Donaldson Lake and Foot Bay gneisses and are uncomformably overlain by the Martin Lake basal conglomerates in the hanging wall of the Saint Louis fault (Fig. 2.6). 2.4.2.2. Structural and metamorphic relationships in the Saint Louis fault The Foot Bay gneiss, which occurs in the footwall and hanging wall of the fault (Fig. 2.6B) has a mylonitic texture characterized by rotated augen-shaped Kfs 1 feldspars porphyroclasts (Fig. 2.7A) surrounded by recrystallized Qtz 1 quartz and layers of Chl 1 chlorite, Bt 1 biotite and Hbl 1 hornblende. 39
A Meters LEGEND B Figure 2.6. A: Detailed geologic map of the Ace-Fay-Verna deposits showing main lithological units, structural elements and location of the uranium deposits (modified from Macdonald 40
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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
Page 7 and 8: Sarah Rice and Jonathan Cloutier, a
Page 9 and 10: TABLE OF CONTENTS Abstract………
Page 11 and 12: 2.5.2. Temporal relationships of fa
Page 13 and 14: 4.5.3. Isotopic compositions of min
Page 15 and 16: List of Figures Figure 1.1. General
Page 17 and 18: Figure 4.16. Distribution of 207 Pb
Page 19 and 20: Table 4.4. Isotopic data of the U-P
Page 21 and 22: processes by which these deposits f
Page 23 and 24: Figure 1.1. Generalized geological
Page 25 and 26: which is the equivalent of the Mill
Page 27 and 28: dolostone and carbonaceous shale (L
Page 29 and 30: Mineral Field (Figure 1.2). Many de
Page 31 and 32: 2005). U mineralization is controll
Page 33 and 34: Figure 1.4. Schematic representatio
Page 35 and 36: In particular, the key issues to be
Page 37 and 38: genetic model for the U mineralizat
Page 39 and 40: fourth and most significant uranium
Page 41 and 42: The Beaverlodge area is part of the
Page 43 and 44: 1998; Hartlaub and Ashton, 1998). R
Page 45 and 46: (D 1 ) produced a regional migmatit
Page 47 and 48: These previous age models do not ta
Page 49 and 50: the age when the concentrations of
Page 51 and 52: Figure 2.3. A: Detailed geologic ma
Page 53 and 54: hornblende-feldspar gneiss showing
Page 55 and 56: east-west striking en-échelon quar
Page 57: and broken Kfs 1 and Qtz 1 embedded
Page 62 and 63: Figure 2.7. Microphotograph of vari
Page 64: eplaces Kfs 1 feldspars (Fig. 2.7A)
Page 67 and 68: the Qtz 1 quartz dissolution result
Page 69 and 70: Figure 2.9. Microphotograph of typi
Page 71 and 72: uraninite (Fig. 2.10). The errors o
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
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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
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equilibrium with a fluid having δ
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Syn-ore Chl 8 chlorite sampled from
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Figure 3.9. Binary diagrams showing
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Figure 3.10. Chondrite-normalized R
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Retrograde metamorphism Early vein
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contents in syn-ore Chl 4 chlorite
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decompression and hydration reactio
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mineralizations, which upgraded the
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metamorphic origin of the main U 4
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y the abundance of Ap 1 apatite and
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of late fluid events that have affe
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CHAPTER 4 FLUID EVOLUTION AND GENES
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1990, 1991; Wyborn et al., 1990). H
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stable isotope geochemistry, U-Pb g
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coincident with the initiation of s
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plasma mass spectrometry (LA-HR-ICP
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The Coronation Hill deposit occupie
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arsenides, nickel selenide and copp
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No corrections were made to the 238
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which was interpreted as being asso
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porphyry and coated by Chl 1 formin
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Mineralized breccias showing quartz
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SOUTH ALLIGATOR RIVER GROUP EL SHER
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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
Page 207 and 208:
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
Page 237 and 238:
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
Page 243 and 244:
Saskatchewan Geological Survey, Sas
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Kyser, K., and Cuney, M., 2008. Geo
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two-sided oblique-slip collisional
Page 249 and 250:
Creek Geosyncline: in ‘The minera
Page 251 and 252:
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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Page 287 and 288:
Page 289 and 290:
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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