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.
04JAA-0003, Porcupine assemblage wacke, below Timiskaming unconformity, Porcupine Syncline, E Tisdale Twp.(E484309, N5371290), #15 on Fig. 2.
40.3 47 28 0.627 28 17 1225 1.42 13.1885 ± 0.3651 0.49710 ± 0.00734 0.19242 ± 0.00416 2763.0 ± 36.0 7.1 0.631
25.1 111 72 0.671 67 8 6057 0.29 13.4285 ± 0.2212 0.51073 ± 0.00641 0.19069 ± 0.00176 2748.2 ± 15.3 3.9 0.831
47.1 21 14 0.680 12 9 994 1.74 13.3984 ± 0.4068 0.51039 ± 0.00838 0.19039 ± 0.00449 2745.6 ± 39.3 3.9 0.638
5.1 48 29 0.623 29 4 5150 0.34 13.3587 ± 0.2496 0.50988 ± 0.00708 0.19002 ± 0.00207 2742.3 ± 18.0 3.8 0.816
38.1 59 54 0.937 37 8 3306 0.52 13.1459 ± 0.2805 0.50412 ± 0.00688 0.18913 ± 0.00280 2734.6 ± 24.6 4.6 0.726
16.1 70 29 0.429 41 7 4312 0.40 13.3076 ± 0.2340 0.51240 ± 0.00707 0.18836 ± 0.00175 2727.9 ± 15.4 2.7 0.851
42.1 46 69 1.558 32 2 10208 0.17 13.1189 ± 0.2335 0.50548 ± 0.00686 0.18823 ± 0.00187 2726.8 ± 16.5 4.0 0.833
24.1 59 32 0.559 35 9 2805 0.62 13.1576 ± 0.2221 0.50746 ± 0.00620 0.18805 ± 0.00192 2725.2 ± 17.0 3.6 0.799
9.1 136 78 0.590 82 9 6955 0.25 13.4287 ± 0.1814 0.51792 ± 0.00581 0.18805 ± 0.00118 2725.2 ± 10.4 1.6 0.888
45.1 116 116 1.038 77 16 3349 0.52 13.5210 ± 0.2127 0.52211 ± 0.00606 0.18782 ± 0.00174 2723.2 ± 15.4 0.7 0.811
34.1 62 70 1.176 41 11 2355 0.74 13.0487 ± 0.2367 0.50467 ± 0.00678 0.18752 ± 0.00199 2720.6 ± 17.6 3.9 0.814
14.1 28 22 0.812 17 8 1625 1.07 13.3108 ± 0.3069 0.51487 ± 0.00717 0.18750 ± 0.00313 2720.4 ± 27.8 1.9 0.695
23.1 42 20 0.489 24 4 4229 0.41 13.0867 ± 0.2295 0.50718 ± 0.00668 0.18714 ± 0.00188 2717.2 ± 16.7 3.3 0.823
31.1 30 24 0.813 19 9 1559 1.11 13.2833 ± 0.3410 0.51499 ± 0.00894 0.18707 ± 0.00315 2716.6 ± 28.1 1.7 0.758
28.1 51 39 0.787 32 13 1762 0.98 13.3381 ± 0.3334 0.51721 ± 0.01028 0.18704 ± 0.00241 2716.3 ± 21.4 1.3 0.859
35.1 59 46 0.814 37 9 2921 0.59 13.3254 ± 0.3770 0.51702 ± 0.00824 0.18693 ± 0.00401 2715.3 ± 35.8 1.3 0.658
8.1 79 70 0.910 49 6 5304 0.33 12.8575 ± 0.1921 0.49892 ± 0.00601 0.18691 ± 0.00139 2715.1 ± 12.3 4.7 0.869
32.1 104 94 0.928 65 8 5453 0.32 12.9278 ± 0.2438 0.50213 ± 0.00828 0.18673 ± 0.00137 2713.6 ± 12.1 4.1 0.923
4.1 86 45 0.538 50 0 250627 0.01 12.9809 ± 0.1962 0.50469 ± 0.00632 0.18654 ± 0.00131 2711.9 ± 11.7 3.5 0.887
20.1 38 40 1.069 25 10 1667 1.04 12.8550 ± 0.2821 0.49999 ± 0.00750 0.18647 ± 0.00266 2711.3 ± 23.7 4.4 0.765
2.1 131 84 0.658 80 7 7813 0.22 13.2296 ± 0.1864 0.51498 ± 0.00644 0.18632 ± 0.00095 2709.9 ± 8.5 1.4 0.933
12.1 101 96 0.984 66 12 3831 0.45 13.4597 ± 0.2007 0.52418 ± 0.00598 0.18623 ± 0.00154 2709.2 ± 13.7 -0.3 0.835
41.1 71 72 1.059 46 9 3491 0.50 13.0627 ± 0.3300 0.50877 ± 0.00729 0.18621 ± 0.00355 2709.0 ± 31.8 2.6 0.662
32.2 171 113 0.686 103 9 8636 0.20 13.0534 ± 0.1734 0.50859 ± 0.00558 0.18615 ± 0.00116 2708.4 ± 10.4 2.6 0.884
6.1 123 80 0.672 74 2 33445 0.05 13.1015 ± 0.2039 0.51061 ± 0.00644 0.18609 ± 0.00143 2707.9 ± 12.7 2.2 0.872
27.1 96 82 0.882 61 7 6496 0.27 13.1786 ± 0.1914 0.51368 ± 0.00607 0.18607 ± 0.00132 2707.7 ± 11.7 1.6 0.875
50.1 51 38 0.772 31 7 3124 0.56 13.1925 ± 0.2270 0.51437 ± 0.00720 0.18602 ± 0.00157 2707.3 ± 14.0 1.4 0.874
49.1 36 20 0.571 21 20 800 2.17 12.9251 ± 0.3722 0.50479 ± 0.01012 0.18571 ± 0.00340 2704.5 ± 30.6 3.2 0.776
39.1 72 66 0.949 46 8 3883 0.45 13.0654 ± 0.2781 0.51041 ± 0.00639 0.18565 ± 0.00292 2704.0 ± 26.2 2.1 0.681
48.1 109 41 0.390 63 28 1762 0.98 13.2091 ± 0.1845 0.51638 ± 0.00575 0.18552 ± 0.00133 2702.9 ± 11.9 0.9 0.861
17.1 110 96 0.903 69 4 11857 0.15 12.9174 ± 0.1698 0.50523 ± 0.00591 0.18543 ± 0.00087 2702.1 ± 7.8 3.0 0.935
36.1 352 229 0.672 217 7 22789 0.08 13.3655 ± 0.1580 0.52290 ± 0.00558 0.18538 ± 0.00073 2701.6 ± 6.5 -0.4 0.944
46.1 160 100 0.647 96 5 13139 0.13 13.0680 ± 0.1525 0.51172 ± 0.00539 0.18521 ± 0.00072 2700.1 ± 6.5 1.6 0.944
11.1 153 214 1.442 106 1 100000 0.02 12.9498 ± 0.1556 0.50750 ± 0.00552 0.18507 ± 0.00072 2698.8 ± 6.5 2.4 0.946
19.1 67 50 0.781 40 8 3443 0.50 12.7695 ± 0.2116 0.50046 ± 0.00649 0.18506 ± 0.00163 2698.7 ± 14.6 3.7 0.849
33.2 179 142 0.818 114 3 25050 0.07 13.2895 ± 0.1781 0.52106 ± 0.00639 0.18498 ± 0.00075 2698.0 ± 6.7 -0.3 0.954
43.1 18 8 0.481 10 29 285 6.08 12.6290 ± 0.5315 0.49537 ± 0.00869 0.18490 ± 0.00668 2697.3 ± 60.9 4.7 0.524
7.1 112 118 1.089 72 4 13263 0.13 12.8922 ± 0.1968 0.50572 ± 0.00648 0.18489 ± 0.00126 2697.3 ± 11.3 2.7 0.896
continued…
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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