Sample SG-28 SG-28 SG-28 SG-28 SG-28 SG-28 SG-28 SG-28 SG-28 SG-28 SG-28 SG-28 SG-28 SG-28 SG-28 SG-28 SG-28 number 1858.9 1863.5 1885 1886.4 1890.1 1899.6 1909.1 1924.3 1931.3 1941.75 1954.2 1955.7 1976.8 1986.1 2005.3 2010.5 2013.5 Height* 157.7 153.1 131.6 130.2 126.5 117 107.5 92.3 85.3 74.85 62.4 60.9 39.8 30.5 11.3 6.1 3.1 Rock type** nc nc p-l p-l p-l p-l p-l p-l p p nc p p-l p o-b/ol nc o-b/ol "SiO2, wt%" 64.21 50.50 46.80 46.72 46.69 47.57 47.88 47.74 44.40 45.19 48.10 43.71 47.94 45.67 51.59 47.10 51.03 Al2O3 16.61 16.17 13.57 15.75 15.53 17.42 15.05 16.19 9.10 9.21 15.79 7.93 13.02 8.13 15.30 10.38 15.03 FeOT 4.60 8.81 10.32 9.72 9.78 8.22 10.16 9.72 11.24 12.86 7.09 16.22 11.72 13.16 8.70 12.21 9.91 MgO 4.82 9.95 16.51 15.11 14.70 12.52 14.42 11.57 23.43 23.24 13.67 23.96 15.80 24.30 8.32 19.90 8.04 CaO 1.82 9.60 10.15 10.76 10.99 12.09 10.24 12.19 10.20 7.70 11.68 6.56 8.81 6.76 10.89 7.73 11.69 Na2O 5.30 2.96 0.78 0.92 0.99 0.99 0.98 1.19 0.31 0.37 1.49 0.38 0.91 0.51 2.46 1.01 1.98 K2O 1.44 1.01 1.13 0.32 0.59 0.49 0.49 0.57 0.59 0.63 1.38 0.43 0.75 0.65 1.46 0.74 1.00 TiO2 0.87 0.80 0.52 0.43 0.45 0.49 0.47 0.57 0.41 0.44 0.53 0.43 0.65 0.51 0.99 0.64 1.00 P2O5 0.21 0.10 0.06 0.06 0.05 0.06 0.06 0.09 0.04 0.05 0.06 0.06 0.09 0.07 0.13 0.08 0.12 MnO 0.12 0.10 0.18 0.19 0.23 0.14 0.23 0.17 0.28 0.31 0.20 0.32 0.32 0.26 0.18 0.21 0.18 H2O+ 2.23 3.82 4.05 3.42 2.64 3.55 0.88 3.64 5.43 5.37 3.94 5.37 3.03 6.66 1.89 3.65 1.51 H2O- 0.64 0.29 0.25 0.51 0.28 0.30 0.77 0.41 0.38 0.50 0.40 0.44 0.34 0.55 0.33 0.34 0.26 CO2 0.97 0.21 0.04 0.02 0.07 0.01 0.06 0.01 0.07 0.01 0.45 0.02 1.20 0.01 0.85 0.35 0.29 S 0.04 0.05 0.15 1.25 0.1 0.08 0.24 0.43 0.32 0.53 0.06 0.2 0.1 0.32 0.49 0.35 0.06 "Ba, ppm" 440 530 128 116 260 108 80 95 45 74 290 35 186 95 250 102 210 Cr 160 63 57 69 78 51 66 64 110 108 45 86 63 99 59 23 34 Cs 0.185 1.15 1.57 1.31 1.28 1.21 1.28 1.23 1.15 1.59 0.775 1.28 1.65 1.48 0.974 1.8 1.31 Hf 4.58 2.05 1.22 1.05 1.07 1.13 1.21 1.44 0.906 1.01 1.15 1.03 1.56 1.11 2.4 1.45 2.55 Pb 6.4 1.99 4.08 8.97 20.2 1.31 5.78 1.96 1.28 3.72 14.89 8.72 9.07 3.16 2.68 4.33 3.72 Rb 38 40 38 10 16 16 23 15 25 29 48 23 23 18 33 22 28 Sc 18.6 27.3 20.5 16.9 20.9 19.5 21.5 20.7 20.2 20.4 21.8 18.7 24.1 21.2 33.8 22.8 33.4 Sr 584 608 176 208 226 278 186 204 154 98 306 108 205 67 292 146 230 Ta 0.736 0.276 0.168 0.151 0.153 0.175 0.183 0.215 0.099 0.137 0.164 0.141 0.237 0.15 0.345 0.211 0.399 Th 7.95 1.7 0.925 0.765 0.803 0.876 0.944 1.2 0.319 0.832 0.977 0.83 1.14 0.785 1.82 1.12 1.94 U 3.24 0.554 0.443 0.293 0.293 0.37 0.554 0.506 0.083 0.209 0.189 0.191 0.442 0.282 0.602 0.403 0.696 Y 30 24 18 10 19 20 16 11 8 12 27 18 20 17 25 13 26 Zr 210 91 57 46 51 54 58 64 39 40 56 42 64 51 99 56 116 "Co, ppm" 16 46 77 106 69 62 70 62 83 110 42 160 75 112 42 95 47 Cu 28 67 160 870 160 138 50 114 98 210 46 600 76 210 73 215 64 Ni 24 114 340 580 186 200 168 158 580 620 205 890 330 620 72 405 54 Zn 172 44 85 83 128 69 156 73 72 164 106 118 134 62 63 79 106 "Pt, ppb" <0.5 <0.5 <0.5 2 <0.5 <0.5 1.3 0.8 5.8 6.7 <0.5 16 1.9 8.3 <0.5 4.3 0.9 Pd <0.5 <0.5 <0.5 1.6 <0.5 <0.5 2.5 <0.5 1.2 2 <0.5 10 1.4 7.3 <0.5 1.4 1 "La, ppm" 32.4 8.05 5.91 6.1 5.81 7.74 6.58 7.35 4.41 5.53 4.85 4.1 7.84 5.77 11.6 7.43 13.1 Ce 67.7 19.8 14.1 14.1 12.6 15.8 14 16.7 11.9 12.9 16 9.95 17.6 12 27.5 16.4 29.4 Nd 31.4 9.97 6.98 6.87 6.24 7.09 7.71 9.24 7.87 6.89 11.9 6.25 9 6.24 14.1 8.27 15.6 Sm 5.93 2.59 1.83 1.66 1.63 1.69 1.79 2.21 2.01 1.7 2.93 1.48 2.23 1.62 3.41 2.17 3.66 Eu 1.29 0.68 0.50 0.54 0.64 0.54 0.64 0.65 0.38 0.44 0.61 0.36 0.69 0.50 1.00 0.60 1.01 Gd 5.4 2.8 2 1.67 1.65 1.63 1.81 2.39 2.13 1.91 2.84 1.68 2.19 1.85 3.38 2.38 3.9 Tb 0.72 0.45 0.31 0.27 0.27 0.26 0.30 0.35 0.30 0.30 0.42 0.27 0.36 0.30 0.57 0.38 0.62 Ho 0.93 0.66 0.40 0.36 0.35 0.36 n.d. 0.45 0.38 0.37 0.52 0.37 0.46 0.39 0.76 0.54 0.86 Tm 0.36 0.27 0.18 n.d. 0.15 0.16 0.18 0.21 0.16 0.15 0.20 0.16 0.21 0.16 0.31 0.22 0.36 Yb 2.16 1.75 1.1 0.92 0.96 1.02 1.14 1.3 0.892 0.929 1.25 0.976 1.31 1.07 1.98 1.41 2.19 Lu 0.32 0.26 0.17 0.13 0.14 0.16 0.16 0.21 0.13 0.15 0.17 0.15 0.20 0.16 0.30 0.20 0.32 87Sr/86Sr 0.70839 0.70842 0.70767 0.70779 0.70773 0.70786 0.70779 0.70798 0.70858 0.70841 0.70841 0.70833 0.70802 0.70833 0.70829 0.70791 0.70776 206Pb/204Pb 17.714 18.086 18.148 18.086 18.181 17.869 18.101 17.917 18.182 18.213 18.264 n.d. 18.214 18.188 18.088 18.092 17.945 207Pb/204Pb 15.501 15.524 15.526 15.511 15.531 15.504 15.546 15.507 15.523 15.529 15.549 n.d. 15.522 15.526 15.507 15.504 15.496 208Pb/204Pb 37.478 37.778 37.827 37.812 37.893 37.687 37.887 37.695 37.847 37.849 37.926 n.d. 37.843 37.854 37.824 37.821 37.786 *Height in meters above base of intrusion. "** Key to rock classification; lg, leucogabbro; qd, quartz diorite; mg, magnetite gabbro; pg, prismatic gabbro; ol-b, olivine-bearing gabbrodolerite; ol-b/ol, olivine-bearing to olivine gabbrodolerite; ol, olivine gabbrodolerite; " "p-l, picritic-like gabbrodolerite; p, picritic gabbrodolerite; ol-r p, olivine-rich picritic gabbrodolerite; t, taxitic gabbrodolerite; c, contact gabbrodolerite; nc, classification in doubt. "