Proposed Title 1: - Queen's University

More documents

Recommendations

Info

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

100 μm diameter within Gn 1 galena (Figs. 4.6E and 4.6F). Cpy 2 chalcopyrite inclusions in Gn 1 galena are common (Fig. 4.6E). A B U 1 Cal 2 U 1 U 1 Chl 2 U 1 Altered quartz-feldspar porphyry fragments Hm 1 U 1 U 1 U 1 200μm Src 1 150μm C D U 1 Ms 1 U 1 Chl 1 Chl 2 Py 1 U 1 U 1 Qtz 1 100μm 500μm E U 1 U 1 U 2 U 1 U 2 U 2 Cpy 1 U 2 Gn 1 Au 1 Gn 1 Az 1 Au 1 Coffinite Figure 4.6. Photomicrographs of typical mineral alteration phases of the syn-ore stage. (A) 151
Mineralized breccias showing quartz-feldspar porphyry fragments cemented by massive U 1 . (B) Mineralized breccias showing U 1 vein crosscutting the early pre-ore alteration assemblage and associated with Cal 2 , Chl 2 , and Hem 2 . (C) Syn-ore Ms 2 associated with the U 1 and Chl 1 . (D) Mineralized breccias showing U 1 replacing early Py 1 grains. (E) Assemblage U 1 -Gn 1 -Au 1 - Cpy 2 . Gn 1 galena as sub-euhedral crystals associated with native Au 1 , Cpy 2 and U 1 . Cpy 2 is locally altered to Az 1 azurite. (F) Mineralized breccias showing U 1 intimately intergrown with Gn 1 and Au 1 . 4.5.1.1.3. Post-ore alteration Post-ore alteration is characterized by late mineralized veins containing banded colloform U 2 uraninite coating Cal 3 calcite veins (Fig. 4.7A) and associated with minor Chl 3 chlorite and Hem 3 hematite. U 2 uraninite fills late fractures indicating remobilization during the post-ore alteration stage. Microprobe investigation reveals that secondary U 2 uraninite grains rim primary U 1 uraninite crystals in the ore (Figs. 4.6E and 4.6F). In reflected light and backscattered electron images, U 2 uraninite is commonly heterogeneous and zoned, has a mottled and speckled appearance, and forms sub -euhedral aggregates (Fig. 4.6E). Post-ore Cal 4 calcite veins cut the ore assemblage (Fig. 4.7B). Thin, fibrous Qtz 3 quartz veinlets crosscut the pre- and syn-ore assemblages (Fig. 4.7C). Cpy 2 chalcopyrite is locally altered to Az 1 azurite (Fig. 4.6E) likely during the post-ore stage. Late Kln 1 kaolinite and Hem 4 hematite alteration obliterates earlier texture and minerals of the pre-ore and syn-ore assemblage (Fig. 4.7D). 152
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 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 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 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
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: porphyry and coated by Chl 1 formin
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 and 180: chemical composition as a result of
Page 181 and 182: Sample I.D SiO 2 CaO FeO ThO 2 MnO
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
Page 231 and 232:
REFERENCES Adams, J., 1989. Postgla
Page 233 and 234:
Ashton, K.E., 2010. The Gunnar Mine
Page 235 and 236:
Bowles, J.F.W., 1990. Age dating of
Page 237 and 238:
Cuney, M.L., 2005. World-class unco
Page 239 and 240:
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
Page 245 and 246:
Kyser, K., and Cuney, M., 2008. Geo
Page 247 and 248:
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
Page 253 and 254:
99.Sheppard SMF and Gilg HA 1996. S
Page 255 and 256:
Proceedings Darwin Conference 1984
Page 257 and 258:
Wingate, M.T.D, Pisarevsky SA, Evan
Page 259 and 260:
Sample Deposit 207 Pb/ 206 Pb ±2σ
Page 261 and 262:
Page 263 and 264:
Page 265 and 266:
APPENDIX B REE contents of various
Page 267 and 268:
Sample Y Zr Cs Ba Th La Ce Pr Nd Sm
Page 269 and 270:
Sample ΣREE TLREE THREE LREE/HREE
Page 271 and 272:
SAMPLE ID. SiO 2 TiO 2 AL 2O 3 CR 2
Page 273 and 274:
SAMPLE ID. SiO 2 TiO 2 AL 2O 3 CR 2
Page 275 and 276:
APPENDIX E Electron microprobe data
Page 277 and 278:
SAMPLE Si 4+ AL 4+ Total AL 6+ Ti 4
Page 279 and 280:
SAMPLE Si 4+ AL 4+ Total AL 6+ Ti 4
Page 281 and 282:
Sample ID. Deposit UO 2 SiO 2 CaO F
Page 283 and 284:
Sample ID. Deposit UO 2 SiO 2 CaO F
Page 285 and 286:
Corrected ratios Apparent ages ( ±
Page 287 and 288:
Corrected ratios Apparent ages ( ±
Page 289 and 290:
Sample ID. Al 2O 3 CaO FeO K2O MgO
Page 291 and 292:
Sample ID. Al 2O 3 CaO FeO K2O MgO
Page 293 and 294:
250 85 330 40 145 70 25 65 30 30 27
Page 295 and 296:
Mineralized veins Quartz veins 276
show all

Proposed Title 1: - Queen's University

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?