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Table 2 Analyses of Uraninite Alteration Products in Spruce Pine Pegmatites 1 2 3 4 5 6 SiO2 BDL BDL 16.79 12.79 BDL BDL ThO2 0.55 0.40 0.85 BDL BDL 1.79 UO3 86.39 87.00 69.77 67.95 79.25 75.34 Y2O3 0.67 0.74 0.77 0.29 BDL BDL Al2O3 BDL 0.05 0.20 0.82 BDL NA PbO 4.21 4.08 0.28 0.37 13.09 14.44 CaO 0.69 2.69 5.35 6.08 1.45 0.06 Na2O 3.65 3.71 BDL NA 3.74 BDL P2O5 BDL BDL BDL 0.42 0.05 NA Total 96.16 98.67 94.01 88.72 97.58 91.63 Columns: 1,2 - Clarkeite, Fanny Gouge; 3 - Uranophane, Fanny Gouge; 4 - Uranophane, Goog Rock; 5 - Fourmarierite, Fanny Gouge; 6 - Fourmarierite, Deake BDL = below limit of detectability NA = not analyzed page 49
Table 3 Representative Electron Microprobe Analyses of U-bearing Niobate-Tantalate Minerals in Spruce Pine Pegmatites 1 2 3 4 5 6 7 8* 9* 10# 11 12 13 Nb2O5 28.70 23.08 8.79 8.89 37.25 42.31 38.73 43.20 36.85 37.74 30.20 42.11 36.55 Ta2O5 27.78 34.73 56.58 49.25 6.62 6.42 13.19 6.73 13.77 6.02 23.27 11.31 11.40 TiO2 1.31 <strong>2.2</strong>0 4.45 6.29 0.13 2.07 1.33 0.23 0.16 0.23 1.54 1.46 2.03 ZrO2 BDL 0.24 BDL BDL BDL 0.26 0.43 BDL BDL BDL 0.12 0.08 0.14 UO2 11.53 7.34 10.29 15.45 5.38 13.07 9.95 4.86 5.82 6.74 15.53 16.16 19.56 ThO2 0.30 0.44 BDL BDL 1.17 0.95 1.62 1.56 0.40 2.91 1.15 1.20 1.80 Sc2O3 0.04 0.09 0.14 0.13 BDL BDL 0.03 BDL 0.05 BDL 0.19 0.35 0.07 Y2O3 6.26 9.46 BDL BDL 21.13 6.66 7.58 28.67 26.54 BDL 5.80 6.25 4.30 REE2O3 9.39 9.85 0.28 BDL 24.23 10.55 13.82 8.62 9.05 BDL 8.92 7.68 8.81 CaO 0.23 0.38 13.46 11.74 1.60 0.23 0.24 1.51 1.51 0.42 0.17 0.33 0.22 FeO 10.37 11.59 0.32 0.66 BDL 11.22 10.51 BDL BDL 4.39 9.05 10.64 10.27 MnO 0.41 0.31 0.21 0.23 BDL 0.80 1.13 BDL BDL 0.07 0.35 0.52 0.60 PbO 1.02 0.51 0.52 0.83 0.49 1.64 0.68 0.62 0.65 30.95 1.08 1.09 1.00 Na2O BDL BDL 1.01 1.90 BDL 0.05 BDL BDL BDL BDL 0.15 BDL BDL Total 97.39 100.22 96.05 95.37 98.00 96.23 99.24 96.40 95.20 92.80 97.52 99.18 96.75 Oxygens 4 4 7 7 4 4 4 4 4 7 4 4 4 Nb 0.667 0.523 0.325 0.348 0.838 0.919 0.839 0.914 0.818 1.688 0.700 0.901 0.834 Ta 0.388 0.474 1.365 1.158 0.090 0.084 0.172 0.086 0.184 0.162 0.324 0.146 0.156 Ti 0.051 0.083 0.297 0.409 0.005 0.075 0.048 0.008 0.006 0.017 0.059 0.052 0.077 Zr 0.000 0.006 0.000 0.000 0.000 0.006 0.010 0.000 0.000 0.000 0.003 0.002 0.003 U 0.132 0.082 0.203 0.297 0.060 0.140 0.106 0.051 0.064 0.148 0.177 0.170 0.220 Th 0.004 0.005 0.000 0.000 0.013 0.010 0.018 0.017 0.004 0.066 0.013 0.013 0.021 Sc 0.002 0.004 0.011 0.010 0.000 0.000 0.001 0.000 0.002 0.000 0.008 0.014 0.003 Y 0.171 0.253 0.000 0.000 0.560 0.170 0.193 0.714 0.694 0.000 0.158 0.157 0.115 REE 0.159 0.163 0.008 0.000 0.397 0.166 0.218 0.130 0.144 0.000 0.150 0.119 0.147 Ca 0.013 0.020 1.297 1.088 0.085 0.012 0.012 0.076 0.079 0.044 0.009 0.017 0.012 Fe 0.446 0.486 0.024 0.048 0.000 0.451 0.421 0.000 0.000 0.363 0.388 0.421 0.433 Mn 0.018 0.013 0.016 0.017 0.000 0.033 0.046 0.000 0.000 0.006 0.015 0.021 0.026 Pb 0.014 0.007 0.012 0.019 0.007 0.021 0.009 0.008 0.009 0.824 0.015 0.014 0.014 Na 0.000 0.000 0.174 0.319 0.000 0.005 0.000 0.000 0.000 0.000 0.015 0.000 0.000 A 0.959 1.039 1.745 1.798 1.122 1.014 1.034 0.996 0.996 #1.781 0.951 0.948 0.994 B 1.106 1.080 1.987 1.915 0.933 1.078 1.059 1.008 1.008 1.867 1.083 1.099 1.067 Sum A+B 2.065 2.119 3.732 3.713 2.055 2.092 2.093 2.004 2.004 3.648 2.034 2.047 2.061 Columns: 1,2 - Samarskite, McKinney; 3,4 - Uranoan Microlite, McKinney; 5 - Fergusonite, McKinney; 6,7 - Samarskite, W. W. Wiseman; 8,9 - Fergusonite, W. W. Wiseman; 10 - Plumbopyrochlore, W. W. Wiseman; 11,12 - Samarskite, Peterson; 13 - Samarskite, Polly Randolph BDL = below limit of detectability *Contains 0.40 F #Contains 3.33 SiO2 (Si = 0.330) page 50
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Carolina Geological Society 2008 Fi
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The Spruce Pine Mining District - A
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GEOLOGY The geologic history of Spr
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The Sink Hole at Bandana: A Blue Ri
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of the site on U.S. 226, between Sp
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additional quality, mica’s dielec
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Page 62 and 63: Figure 2 Warner and others (2008) p
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Page 70 and 71: Table 4 Uraninite Age Determination
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