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

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Table A2. continued Struct. U Th Pb* 207 Pb/ 206 Pb ± 1σ 204 Pb f206 Disc. Corr. Spot Dom. (ppm) (ppm) Th/U (ppm) (ppb) 207 Pb/ 235 U ± 1σ 206 Pb/ 238 U ± 1σ 207 Pb/ 206 Pb ± 1σ Age (Ma) 206 Pb/ 204 Pb (%) (%) Coeff. 99JAA-0057, Heterolithic volcanic breccia, Timiskaming assemblage, Swayze Township (E038175, N5297199; see Ayer, Ketchum and Trowell 2002) 13.1 sharp, elong igneous frag 62 64 1.065 41 37 753 2.30 13.4560 ± 0.4039 0.50635 ± 0.00866 0.19274 ± 0.00436 2765.7 ± 37.6 5.5 0.664 6.1 core 78 54 0.721 48 4 8777 0.20 13.5290 ± 0.3494 0.51718 ± 0.01130 0.18973 ± 0.00215 2739.8 ± 18.7 2.3 0.901 9.1 sharp, elong igneous frag 123 150 1.259 83 5 11342 0.15 13.1660 ± 0.2729 0.50643 ± 0.00898 0.18855 ± 0.00165 2729.6 ± 14.5 3.9 0.908 17.1 center; v. rounded grain 100 94 0.966 64 6 7820 0.22 13.0290 ± 0.2667 0.50696 ± 0.00880 0.18639 ± 0.00166 2710.6 ± 14.8 3.0 0.902 18.1 center; slightly rounded exterior 80 30 0.385 45 9 3785 0.46 12.8790 ± 0.2856 0.50277 ± 0.00842 0.18578 ± 0.00234 2705.2 ± 20.9 3.6 0.827 8.1 center; fairly rounded exterior 570 595 1.077 259 121 1582 1.10 9.9071 ± 0.2706 0.38687 ± 0.00760 0.18573 ± 0.00310 2704.7 ± 27.8 25.8 0.795 1.1 core 599 801 1.381 432 6 49603 0.04 13.6090 ± 0.1944 0.53182 ± 0.00718 0.18559 ± 0.00061 2703.5 ± 5.4 -2.1 0.974 11.1 sharp, elong igneous frag 151 166 1.132 98 6 10549 0.16 12.9580 ± 0.2484 0.50641 ± 0.00841 0.18558 ± 0.00143 2703.4 ± 12.8 2.8 0.917 16.1.2 center or core?; prism. grain exterior 96 70 0.753 56 5 7430 0.23 12.4050 ± 0.3098 0.48479 ± 0.00886 0.18559 ± 0.00276 2703.4 ± 24.8 6.9 0.806 12.1 elong., slightly rounded 52 54 1.081 32 10 2171 0.80 12.3340 ± 0.3274 0.48207 ± 0.00831 0.18556 ± 0.00337 2703.2 ± 30.3 7.5 0.735 15.1 center; fairly rounded exterior 209 319 1.575 150 11 8527 0.20 13.0330 ± 0.2335 0.51073 ± 0.00784 0.18508 ± 0.00139 2698.9 ± 12.5 1.8 0.909 5.1 core? of rounded gr 799 417 0.539 479 28 12887 0.13 13.3800 ± 0.2043 0.52508 ± 0.00759 0.18481 ± 0.00064 2696.6 ± 5.7 -1.1 0.975 4.1 center or core? 108 62 0.599 64 8 6077 0.29 13.1460 ± 0.2543 0.51594 ± 0.00788 0.18479 ± 0.00187 2696.4 ± 16.8 0.7 0.855 10.1 center; slightly rounded exterior 312 492 1.629 224 4 31918 0.05 12.8420 ± 0.2216 0.50812 ± 0.00793 0.18330 ± 0.00103 2683.0 ± 9.4 1.6 0.946 14.1 embayment on long prism 272 42 0.159 136 18 6128 0.28 11.9600 ± 0.2151 0.47630 ± 0.00778 0.18211 ± 0.00105 2672.2 ± 9.6 7.3 0.948 2.1 angular, core? In rounded elong grain 407 110 0.280 219 104 1695 1.02 12.4140 ± 0.2016 0.50195 ± 0.00693 0.17936 ± 0.00125 2647.0 ± 11.7 1.1 0.904 03JAA-0006, Syenitic feldspar porphyry, Discovery outcrop, Kirkland Lake, Teck Township (E571986, N5333892), #30 on Fig. 2. 10.1 core 75 30 0.410 43 5 6273 0.28 13.0790 ± 0.2901 0.50333 ± 0.00822 0.18846 ± 0.00247 2728.8 ± 21.8 4.5 0.810 12.1 core 178 92 0.532 101 2 30931 0.06 12.7280 ± 0.2140 0.49148 ± 0.00709 0.18782 ± 0.00132 2723.2 ± 11.6 6.5 0.910 9.1 core 163 100 0.633 96 22 3148 0.55 12.9370 ± 0.2371 0.50255 ± 0.00737 0.18670 ± 0.00174 2713.3 ± 15.4 4.0 0.864 4.1 core 175 84 0.494 101 1 134771 0.01 12.9420 ± 0.2522 0.50412 ± 0.00793 0.18620 ± 0.00181 2708.9 ± 16.1 3.5 0.870 2.1 core 347 208 0.619 199 6 24704 0.07 12.4840 ± 0.2555 0.48747 ± 0.00786 0.18574 ± 0.00199 2704.8 ± 17.8 6.5 0.854 13.1 core 97 33 0.350 55 5 8063 0.22 13.2120 ± 0.2725 0.51623 ± 0.00880 0.18562 ± 0.00180 2703.7 ± 16.1 0.9 0.885 5.1 core? 157 67 0.441 88 2 26889 0.06 12.6760 ± 0.2226 0.49559 ± 0.00743 0.18551 ± 0.00139 2702.8 ± 12.4 4.9 0.906 17.1 core? 273 188 0.710 160 10 11639 0.15 12.5840 ± 0.2298 0.49243 ± 0.00779 0.18534 ± 0.00137 2701.3 ± 12.2 5.4 0.917 11.1 core 619 485 0.809 371 24 10810 0.16 12.6740 ± 0.2117 0.49609 ± 0.00785 0.18529 ± 0.00070 2700.8 ± 6.2 4.7 0.975 6.1 core 345 126 0.376 196 3 44984 0.04 13.0320 ± 0.3851 0.51240 ± 0.01055 0.18446 ± 0.00346 2693.4 ± 31.4 1.2 0.776 1.1 core 256 92 0.372 143 15 7465 0.23 12.8220 ± 0.2049 0.50490 ± 0.00705 0.18418 ± 0.00114 2690.9 ± 10.3 2.5 0.923 18.2 rim 1027 471 0.474 591 7 63052 0.03 12.8960 ± 0.1934 0.50977 ± 0.00704 0.18347 ± 0.00080 2684.5 ± 7.2 1.3 0.958 19.1 core 672 198 0.305 362 16 17928 0.10 12.4210 ± 0.1825 0.49430 ± 0.00681 0.18225 ± 0.00067 2673.5 ± 6.1 3.8 0.969 3.1 magmatic? 492 459 0.965 301 73 2865 0.61 12.1440 ± 0.1859 0.49035 ± 0.00664 0.17962 ± 0.00102 2649.4 ± 9.4 3.5 0.931 14.1 rim 234 55 0.243 129 14 7567 0.23 12.7160 ± 0.2316 0.51568 ± 0.00833 0.17884 ± 0.00119 2642.1 ± 11.1 -1.8 0.932 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). 140
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. BNB01-T-01, Timiskaming sandstone, basal Dome Formation, above Greenstone Nose unconformity, Dome Mine, Tisdale Township (see Ayer et al., 2003), #12 on Fig. 2. 45.1 55 24 0.438 34 35 738 2.35 14.5948 ± 0.2543 0.53385 ± 0.00641 0.19828 ± 0.00222 2812.1 ± 18.4 2.4 0.770 15.1 148 73 0.505 89 5 12241 0.14 14.1151 ± 0.1822 0.51955 ± 0.00595 0.19704 ± 0.00092 2801.9 ± 7.7 4.6 0.933 43.1 78 46 0.616 49 6 5631 0.31 14.5544 ± 0.2138 0.53812 ± 0.00668 0.19616 ± 0.00126 2794.5 ± 10.6 0.8 0.900 38.1 87 46 0.543 53 18 2260 0.77 14.2327 ± 0.2895 0.53139 ± 0.00628 0.19426 ± 0.00294 2778.5 ± 25.0 1.4 0.674 23.1 31 25 0.850 19 7 1868 0.93 13.2719 ± 0.3351 0.50965 ± 0.00806 0.18887 ± 0.00336 2732.3 ± 29.6 3.4 0.715 12.1 60 48 0.823 36 2 13252 0.13 12.8256 ± 0.2256 0.49325 ± 0.00665 0.18859 ± 0.00184 2729.9 ± 16.1 6.4 0.836 36.1 48 20 0.440 27 16 1317 1.32 13.0093 ± 0.3018 0.50123 ± 0.00896 0.18824 ± 0.00240 2726.9 ± 21.1 4.8 0.839 44.1 44 44 1.016 28 38 512 3.39 12.8383 ± 0.3253 0.49582 ± 0.00723 0.18779 ± 0.00356 2722.9 ± 31.6 5.7 0.669 48.1 36 26 0.751 22 36 451 3.85 13.0856 ± 0.3409 0.50584 ± 0.00819 0.18762 ± 0.00347 2721.4 ± 30.8 3.7 0.710 32.1 232 150 0.667 143 6 16218 0.11 13.5547 ± 0.1640 0.52416 ± 0.00574 0.18755 ± 0.00074 2720.8 ± 6.5 0.2 0.946 46.1 63 77 1.267 42 23 1197 1.45 12.8406 ± 0.2095 0.49804 ± 0.00585 0.18699 ± 0.00186 2715.9 ± 16.5 4.9 0.796 50.1 200 168 0.870 125 44 1988 0.87 13.0931 ± 0.1695 0.50823 ± 0.00588 0.18685 ± 0.00085 2714.6 ± 7.5 2.9 0.937 21.2 38 31 0.836 24 4 3979 0.44 13.0899 ± 0.3391 0.50813 ± 0.00837 0.18684 ± 0.00337 2714.5 ± 30.0 3.0 0.723 10.1 219 182 0.856 135 3 28662 0.06 12.9054 ± 0.1541 0.50311 ± 0.00547 0.18604 ± 0.00070 2707.5 ± 6.2 3.6 0.951 22.1 154 129 0.864 96 4 17036 0.10 13.0358 ± 0.1788 0.50842 ± 0.00632 0.18596 ± 0.00083 2706.8 ± 7.4 2.6 0.947 16.1 80 74 0.956 50 5 6415 0.27 12.8268 ± 0.1925 0.50044 ± 0.00597 0.18589 ± 0.00144 2706.2 ± 12.8 4.1 0.859 24.1 525 47 0.093 285 5 44623 0.04 13.3422 ± 0.1495 0.52069 ± 0.00545 0.18584 ± 0.00054 2705.7 ± 4.8 0.2 0.967 37.1 143 133 0.965 90 13 4752 0.37 12.9223 ± 0.1759 0.50471 ± 0.00594 0.18569 ± 0.00103 2704.4 ± 9.2 3.2 0.915 28.1 288 91 0.325 163 10 12203 0.14 13.2393 ± 0.1693 0.51718 ± 0.00568 0.18566 ± 0.00099 2704.1 ± 8.8 0.8 0.911 19.1 429 193 0.464 252 3 56370 0.03 13.2676 ± 0.1474 0.51837 ± 0.00538 0.18563 ± 0.00053 2703.8 ± 4.7 0.5 0.967 27.1 156 75 0.499 90 3 22507 0.08 13.0568 ± 0.1898 0.51032 ± 0.00656 0.18556 ± 0.00099 2703.2 ± 8.9 2.0 0.931 30.1 86 55 0.666 52 5 7351 0.24 13.1598 ± 0.1903 0.51478 ± 0.00630 0.18541 ± 0.00117 2701.8 ± 10.5 1.1 0.901 47.1 190 164 0.893 118 49 1705 1.02 12.9085 ± 0.1638 0.50542 ± 0.00558 0.18523 ± 0.00093 2700.3 ± 8.3 2.9 0.920 49.1 121 25 0.210 66 195 293 5.92 13.2125 ± 0.2699 0.51744 ± 0.00624 0.18519 ± 0.00279 2699.9 ± 25.1 0.5 0.683 40.1 130 74 0.590 77 19 3065 0.57 13.0119 ± 0.2397 0.50996 ± 0.00827 0.18506 ± 0.00129 2698.7 ± 11.5 1.9 0.927 6.1 123 56 0.467 71 2 28401 0.06 12.9772 ± 0.2038 0.50880 ± 0.00607 0.18498 ± 0.00163 2698.1 ± 14.6 2.1 0.830 21.1 37 20 0.569 21 1 19395 0.09 12.8458 ± 0.2301 0.50381 ± 0.00676 0.18493 ± 0.00191 2697.6 ± 17.1 3.0 0.821 14.1 101 45 0.457 58 5 8379 0.21 12.9333 ± 0.1867 0.50741 ± 0.00575 0.18486 ± 0.00141 2697.0 ± 12.7 2.3 0.851 4.1 142 103 0.753 85 5 12847 0.14 12.7812 ± 0.2486 0.50156 ± 0.00793 0.18482 ± 0.00176 2696.6 ± 15.8 3.4 0.874 29.1 160 107 0.689 98 6 11989 0.15 13.1507 ± 0.1706 0.51622 ± 0.00584 0.18476 ± 0.00094 2696.1 ± 8.4 0.6 0.921 35.1 234 157 0.695 141 21 4959 0.35 12.9260 ± 0.1975 0.50741 ± 0.00689 0.18476 ± 0.00102 2696.1 ± 9.2 2.3 0.933 17.1 332 204 0.634 198 4 36036 0.05 12.9764 ± 0.1554 0.50942 ± 0.00568 0.18475 ± 0.00059 2696.0 ± 5.3 1.9 0.964 25.1 301 230 0.787 185 4 29360 0.06 12.9560 ± 0.1566 0.50888 ± 0.00551 0.18465 ± 0.00077 2695.1 ± 6.9 2.0 0.940 9.1 139 70 0.520 80 7 8469 0.21 12.8234 ± 0.2271 0.50489 ± 0.00581 0.18421 ± 0.00223 2691.1 ± 20.1 2.5 0.735 11.1 374 323 0.892 235 4 45434 0.04 12.9530 ± 0.1571 0.51001 ± 0.00553 0.18420 ± 0.00078 2691.1 ± 7.0 1.6 0.938 41.1 639 517 0.837 397 17 16345 0.11 12.9430 ± 0.1487 0.50963 ± 0.00560 0.18420 ± 0.00041 2691.0 ± 3.7 1.6 0.981 7.2 40 23 0.589 22 2 6982 0.25 12.0634 ± 0.2617 0.47505 ± 0.00638 0.18418 ± 0.00284 2690.8 ± 25.7 8.3 0.708 2.1 120 106 0.910 74 1 100000 0.02 12.6243 ± 0.1643 0.49715 ± 0.00565 0.18417 ± 0.00093 2690.8 ± 8.4 4.0 0.922 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). 141
Page 1:
ISBN 0-7794-8652-8 THESE TERMS GOVE
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ONTARIO GEOLOGICAL SURVEY Open File
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Contents Abstract .................
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Appendix 1. Thermal Ionization Mass
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Miscellaneous Release—Data 155 Di
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The Timmins area and Kirkland Lake-
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Overview of Results from the Greens
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3. The geophysical subproject funct
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The following Preliminary Maps have
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Samples with zircons analyzed by SH
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Figure 4. U/Pb concordia plots of T
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Figure 6. U/Pb concordia plot of TI
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Targeting of several of these overg
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Figure 10. U/Pb SHRIMP results from
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In northwest Cleaver Township, a fe
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SHRIMP U/Pb dating was carried out
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Stratigraphic Framework In this sec
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PACAUD ASSEMBLAGE The 2750 to 2735
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The iron formation and chert brecci
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(thickness) of banded iron-poor iro
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clast conglomerates at the top of t
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BLAKE RIVER ASSEMBLAGE Lower Part T
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The Krist formation consists of cal
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Timmins Area In the Timmins area, t
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Kirkland Lake-Larder Lake Area Hyde
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Intrusion Framework The plutonic ro
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The youngest dated synvolcanic mafi
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Albitite dikes are crosscut by gold
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Worming Geophysical Data Treatment
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In Timmins, the first generation of
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Figure 20. Geological sketch map of
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from Halfmoon Lake, only 2 km to th
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The Blake River Group is divided in
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Figure 22. Geological map of Munro
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Mine stratigraphic succession, have
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Figure 24. Geological map of Currie
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Table 5. Simplified classification
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mesocumulate). The Stoughton-Roquem
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Shaw Dome Area GEOLOGICAL SETTING T
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66 Figure 26. A generalized map of
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1999) in their REE patterns and oth
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plumbing system geometrically stabl
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GOLD MINERALIZATION Production comm
Page 100 and 101:
The Narrows Break mineralized zone,
Page 102 and 103:
Table 7. Diagnostic mineral assembl
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anomaly and the Dome Mine (Figures
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Recommendations • Further testing
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of the inversion product. (Recent a
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the evidence for pre-Pacaud strata
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plutonism suggests the onset of reg
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Watkinson and Comba 1989; Gibson an
Page 116 and 117: The Kirkland Lake giant gold deposi
Page 118 and 119: The Timmins and Kirkland Lake-Larde
Page 120 and 121: References Ames, D.E., Bleeker, W.,
Page 122 and 123: Bleeker, W., Parrish, R.R. and Sage
Page 124 and 125: Galley, A.G., Pilote, P. and Davis,
Page 126 and 127: Heather, K.B., Percival, J.A., Mose
Page 128 and 129: Lesher, C.M., 1989. Komatiite-assoc
Page 130 and 131: Péloquin, A.S., Verpaelst, P., and
Page 132 and 133: Stern, R.A. 1997. The GSC sensitive
Page 134 and 135: 108 This page left blank intentiona
Page 136 and 137: THERMAL IONIZATION MASS SPECTROMETR
Page 138 and 139: 04BHA-0462 Granophyre, Kamiskotia G
Page 140 and 141: contrastingly have been dated near
Page 142 and 143: The revised age of 2672.8±1.1 Ma f
Page 144 and 145: fraction (A1a) also overlaps concor
Page 146 and 147: 04JAA-0010 Albitite dike cutting Ti
Page 148 and 149: Therefore, on geochronological grou
Page 150 and 151: Three individual grains were analyz
Page 152 and 153: 03VOI-0422-1 Trachytic lava, Timisk
Page 154 and 155: 03SJP-115-1 Monzonite, Clifford sto
Page 156 and 157: the original Corfu (1993) age, only
Page 158 and 159: Table A1. U/Pb isotopic data for zi
Page 160 and 161: 206 Sample Analysis Description Wei
Page 162 and 163: Appendix 2 Sensitive High-Resolutio
Page 164 and 165: Table A2. Ion microprobe (SHRIMP II
Page 168 and 169: Table A2. continued 204 U Th Pb* Pb
Page 170 and 171: Table A2. continued 204 U Th Pb* Pb
Page 172: Metric Conversion Table Conversion
Page 175 and 176: Chart A. Magnetic and Gravity Three
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