Proposed Title 1: - Queen's University
Proposed Title 1: - Queen's University Proposed Title 1: - Queen's University
plutons include the 2321±3 Ma Gunnar granite (Fig. 2.13B) (Hartlaub et al., 2007), which hosts the granite-related metasomatic-type U 3 uranium mineralization. Crosscutting relationships suggest that the metasomatic-type mineralization pre-dates the breccia event. The timing of U 3 -mineralization is therefore constrained between the age of the Gunnar granite and the age of the breccia that has overprinted the U 3 -mineralized granite. Deposition of the Murmac Bay Group, Mylonitization and Granitization Various periods of tectonic reactivation, basin formation, volcanism and uranium mineralization 67
Figure 2.13. Schematic cross-sections illustrating the general tectonic evolution and timing of the uranium mineralization in the Beaverlodge area. A: ≈2.33 Ga: Deposition of the Murmac Bay Group rocks in a tectonically active fault-bounded Paleoproterozoic basin. B: ≈2.33-2.3 Ga: mylonitization with oblique-normal and dextral sense of shear along fault zones, concomitant with emplacement of the Gunnar granite. C: 2.29 Ga: Reactivation during late Arrowsmith orogenic exhumation. Cataclasite fault overprinted the mylonite. ±U1 is 68
- 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 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: faults (Fig. 2.13C). The breccias w
- 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 and 126: Stable isotopic O and C composition
- 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
plutons include the 2321±3 Ma Gunnar granite (Fig. 2.13B) (Hartlaub et al., 2007), which<br />
hosts the granite-related metasomatic-type U 3<br />
uranium mineralization. Crosscutting<br />
relationships suggest that the metasomatic-type mineralization pre-dates the breccia event.<br />
The timing of U 3 -mineralization is therefore constrained between the age of the Gunnar<br />
granite and the age of the breccia that has overprinted the U 3 -mineralized granite.<br />
Deposition of the Murmac Bay Group, Mylonitization and Granitization<br />
Various periods of tectonic reactivation, basin formation, volcanism and uranium mineralization<br />
67
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