Proposed Title 1: - Queen's University
Proposed Title 1: - Queen's University Proposed Title 1: - Queen's University
Figure 2.4. Photographs of the three main lithostructural units: A: Field photo of the cataclasite-dominated leucocratic porphyroclastic metagranitoid in the hanging wall of the fault zone. B: Microphotograph of the cataclasite-dominated leucocratic metagranitoid showing mylonite fragments and broken Kfs 1 and Qtz 1 grains embedded in a matrix of crushed Kfs 1 , recrystallized Qtz 1 , and Src 2 and Py 2 . C: Field photo of the hornblende-feldspar gneiss boudinaged and parallel to the foliation (N240 o ). D: Microphotograph of the 33
hornblende-feldspar gneiss showing Hbl 1 and Kfs 1 porphyroclasts. E: Field photo of the mylonitized metavolcano-sedimentary rocks of the melanocratic metagranitoid unit. F: Microphotograph of the mylonitized metavolcano-sedimentary rocks showing a mylonitic fabric that consists of flattened and preferentially oriented trails of Bt 1 , Chl 1 , Src 1 , dynamically recrystallized Qtz 1 and rotated Kfs 1 porphyroclasts. G: Field photo of the mylonitized quartz-feldspar rocks showing rotated δ- and σ-type winged Kfs 1 porphyroclasts. H: Microphotograph of the mylonitized quartz-feldspar rocks showing σ-Kfs 1 , recrystallized Qtz 1 and Src 1 . Pen indicates north. Bt: biotite, Chl: chlorite, Kfs: potassium feldspar, Hbl: hornblende, Py: Pyrite, Qtz: quartz, Src: sericite. 2.4.1.2. Structural and metamorphic relationships in the Main Ore shear zone The Main Ore shear zone records a complex history of ductile, brittle-ductile and brittle deformation. The shear zone strikes N240 o and is steeply southeast dipping at the surface (75 o to 85 o ) but becomes shallow at depth (30 o to 40 o ) (Fig. 2.3B). Southeast of the shear zone, cataclasite and ultracataclasite dominate the hanging wall. The intensity of the cataclasitic deformation increases from southeast to northwest toward the ductile shear zone where the footwall is mylonite-dominated and overprinted by a mélange of cataclasite, breccias and veins that host the uranium mineralization (Fig. 2.3B). The ductile component of the shear zone defines the oldest deformation observed. The shear zone displays a southeast dipping foliation and northeast trending elongation lineation (Fig. 2.3) defined by elongate Kfs 1 feldspars and recrystallized Qtz 1 quartz (Fig. 2.4F). The mylonitic fabric is heterogeneously developed due to contrasting rheology of the melanocratic metagranitoid rocks. The strain is more localized into relatively weak rock types such as the metavolcano-sedimentary rocks (Fig. 2.4E), which have a mylonitic fabric and foliation consisting of preferentially oriented trails of Bt 1 biotite, Chl 1 chlorite, 34
- Page 1 and 2: FLUID EVOLUTION AND STRUCTURAL CONT
- Page 3 and 4: Abstract Uranium deposits associate
- Page 5 and 6: 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: Figure 2.3. A: Detailed geologic ma
- Page 55 and 56: east-west striking en-échelon quar
- Page 57 and 58: and broken Kfs 1 and Qtz 1 embedded
- Page 59 and 60: A Meters LEGEND B Figure 2.6. A: De
- 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
Figure 2.4. Photographs of the three main lithostructural units: A: Field photo of the<br />
cataclasite-dominated leucocratic porphyroclastic metagranitoid in the hanging wall of the<br />
fault zone. B: Microphotograph of the cataclasite-dominated leucocratic metagranitoid<br />
showing mylonite fragments and broken Kfs 1 and Qtz 1 grains embedded in a matrix of<br />
crushed Kfs 1 , recrystallized Qtz 1 , and Src 2 and Py 2 . C: Field photo of the hornblende-feldspar<br />
gneiss boudinaged and parallel to the foliation (N240 o ). D: Microphotograph of the<br />
33
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