Overview of Results from the Greenstone ... - Geology Ontario

Table A2. continued
204
U Th Pb* Pb f206
207 Pb/
206 Pb ± 1σ Disc. Corr.
206
Spot (ppm) (ppm) Th/U (ppm) (ppb) Pb/
204 Pb (%)
207 Pb/
235 U ± 1σ
206 Pb/
238 U ± 1σ
207 Pb/
206 Pb ± 1σ Age (Ma) (%) Coeff.
98JAA-0011, Felsic to intermediate tuff, upper Tisdale assemblage, NW Cleaver Township (see Ayer et al., 2002), #29 on Fig. 2.
3.1 58 31 0.558 35 2 14457 0.12 13.5389 ± 0.3464 0.51957 ± 0.00844 0.18899 ± 0.00337 2733.4 ± 29.7 1.6 0.722
9.1 96 43 0.462 54 0 100000 0.02 12.8633 ± 0.2995 0.49369 ± 0.00943 0.18897 ± 0.00210 2733.2 ± 18.4 6.5 0.880
13.1 65 44 0.690 39 7 4307 0.40 13.0050 ± 0.4352 0.49962 ± 0.01064 0.18878 ± 0.00439 2731.6 ± 38.9 5.3 0.724
11.1 69 43 0.645 41 0 100000 0.02 12.9105 ± 0.3544 0.49775 ± 0.01166 0.18812 ± 0.00220 2725.8 ± 19.4 5.4 0.907
10.1 104 58 0.577 62 5 8548 0.20 13.3259 ± 0.3271 0.51466 ± 0.00989 0.18779 ± 0.00245 2722.9 ± 21.7 2.1 0.849
7.1 95 58 0.634 56 3 14950 0.12 13.0227 ± 0.2855 0.50302 ± 0.00858 0.18777 ± 0.00222 2722.7 ± 19.6 4.3 0.846
5.1 94 67 0.728 58 2 19231 0.09 13.1446 ± 0.2568 0.50790 ± 0.00822 0.18770 ± 0.00171 2722.1 ± 15.1 3.3 0.887
2.1 174 69 0.413 96 1 100000 0.02 12.7455 ± 0.2881 0.49295 ± 0.00988 0.18752 ± 0.00155 2720.6 ± 13.7 6.1 0.932
6.1 128 104 0.841 79 8 7253 0.24 12.9252 ± 0.2301 0.50048 ± 0.00762 0.18730 ± 0.00141 2718.6 ± 12.4 4.6 0.908
12.1 69 32 0.480 39 8 3512 0.49 12.9101 ± 0.3561 0.50451 ± 0.00887 0.18559 ± 0.00356 2703.5 ± 32.0 3.2 0.725
8.1 73 36 0.506 42 1 30139 0.06 12.8817 ± 0.3391 0.50347 ± 0.01043 0.18557 ± 0.00257 2703.3 ± 23.1 3.4 0.853
1.1 75 45 0.624 42 5 5984 0.29 12.4037 ± 0.3416 0.48635 ± 0.00918 0.18497 ± 0.00330 2697.9 ± 29.8 6.4 0.766
14.1 56 35 0.644 32 4 5471 0.32 12.4150 ± 0.3731 0.48686 ± 0.00957 0.18494 ± 0.00378 2697.7 ± 34.1 6.3 0.739
4.1 41 24 0.593 24 6 3021 0.57 12.7930 ± 0.5043 0.51047 ± 0.01348 0.18176 ± 0.00475 2669.0 ± 44.0 0.5 0.753
15.1 56 24 0.451 31 13 1816 0.95 12.3250 ± 0.3554 0.49615 ± 0.00908 0.18017 ± 0.00362 2654.5 ± 33.7 2.6 0.722
3D-CG, Heterolithic volcanic tuff/breccia flow, Porcupine/Timiskaming? assemblage, Holloway Mine, Holloway Township (see Ropchan et al., 2002), # 37 on Fig. 2.
4.1 137 162 1.221 95 5 11276 0.15 14.1220 ± 0.2597 0.52153 ± 0.00827 0.19639 ± 0.00148 2796.4 ± 12.4 4.0 0.913
10.1 319 205 0.663 199 5 28547 0.06 13.9350 ± 0.2421 0.52869 ± 0.00803 0.19117 ± 0.00129 2752.2 ± 11.2 0.7 0.923
9.2 351 131 0.386 201 5 33490 0.05 13.4180 ± 0.2344 0.51381 ± 0.00776 0.18941 ± 0.00134 2737.0 ± 11.7 2.9 0.915
8.1 197 224 1.175 129 6 14368 0.12 13.2030 ± 0.2667 0.50669 ± 0.00836 0.18899 ± 0.00185 2733.4 ± 16.2 4.1 0.877
20.1 115 51 0.453 66 15 3314 0.52 13.1419 ± 0.2897 0.50548 ± 0.00922 0.18856 ± 0.00195 2729.6 ± 17.1 4.1 0.886
1.1 98 78 0.830 59 8 5419 0.32 12.7820 ± 0.2888 0.49878 ± 0.00807 0.18587 ± 0.00258 2705.9 ± 23.1 4.4 0.793
2.1 192 217 1.165 127 4 19635 0.09 13.0040 ± 0.4197 0.50850 ± 0.01211 0.18547 ± 0.00353 2702.4 ± 31.7 2.4 0.811
14.1 459 1429 3.219 425 5 44603 0.04 13.1810 ± 0.2537 0.51708 ± 0.00835 0.18488 ± 0.00160 2697.1 ± 14.4 0.5 0.895
6.1 862 1815 2.174 698 8 49900 0.04 13.2600 ± 0.2156 0.52030 ± 0.00752 0.18484 ± 0.00108 2696.8 ± 9.7 -0.2 0.934
18.1 580 358 0.637 339 8 32573 0.05 12.6996 ± 0.2046 0.49831 ± 0.00725 0.18484 ± 0.00098 2696.8 ± 8.8 4.1 0.945
13.1 144 92 0.661 84 7 9003 0.19 12.7100 ± 0.2881 0.49908 ± 0.00866 0.18470 ± 0.00232 2695.5 ± 20.9 3.9 0.835
17.1 503 375 0.769 301 10 22168 0.08 12.6830 ± 0.1983 0.49905 ± 0.00736 0.18432 ± 0.00068 2692.1 ± 6.1 3.7 0.972
12.1 436 1079 2.555 352 8 23714 0.07 12.5270 ± 0.2030 0.49434 ± 0.00722 0.18378 ± 0.00100 2687.3 ± 9.0 4.4 0.943
15.1 223 148 0.684 134 6 17030 0.10 12.8780 ± 0.2248 0.50932 ± 0.00762 0.18338 ± 0.00134 2683.7 ± 12.1 1.4 0.910
19.1 268 158 0.608 156 8 14620 0.12 12.6676 ± 0.2447 0.50145 ± 0.00826 0.18322 ± 0.00151 2682.2 ± 13.7 2.8 0.906
3.1 93 114 1.271 62 11 3577 0.48 12.8400 ± 0.2819 0.50857 ± 0.00870 0.18311 ± 0.00216 2681.3 ± 19.6 1.4 0.846
16.1 126 134 1.094 82 5 10321 0.17 12.7630 ± 0.2676 0.50600 ± 0.00863 0.18294 ± 0.00187 2679.7 ± 17.0 1.8 0.875
7.1 121 107 0.915 76 4 12821 0.14 12.7410 ± 0.2829 0.50526 ± 0.00860 0.18288 ± 0.00225 2679.2 ± 20.5 1.9 0.836
5.1 233 282 1.250 157 10 10487 0.17 12.8930 ± 0.2226 0.51221 ± 0.00773 0.18256 ± 0.00122 2676.3 ± 11.1 0.5 0.923
Uncertainties are reported at 1σ (absolute) and are calculated by numerical propagation of all known sources of error.
Pb* = radiogenic Pb; f206 (%): Percentage of 206Pb which is common.
Disc (%) = Percent discordance along a chord to origin for the given 207Pb/206Pb age; Corr. Coeff. = Correlation coefficient (rho).
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