Table 17.
Simple statistics of selected Trace and rare earth elements (REEs) of the El Tranquilo Group, Cañadón Largo Formation, and Laguna Colorada Formation.
Rb (ppm) | Ba (ppm) | Sr (ppm) | La (ppm) | Ce (ppm) | Pr (ppm) | Nd (ppm) | Sm (ppm) | Eu (ppm) | Gd (ppm) | Tb (ppm) | Dy (ppm) | Ho (ppm) | Er (ppm) | Tm (ppm) | Yb (ppm) | Lu (ppm) | Eu/Eu* | LaN/YbN | LaN/SmN | GdN/YbN | Σ REE (ppm) | ||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
El Tranquilo anticline | Mean | 134 | 1030 | 224 | 41.02 | 79.93 | 8.80 | 33.19 | 5.75 | 1.20 | 4.99 | 0.73 | 3.96 | 0.73 | 2.07 | 0.32 | 2.22 | 0.33 | 0.72 | 14.07 | 4.70 | 1.91 | 184.58 |
−95% | 148 | 1261 | 255 | 47.98 | 92.95 | 10.27 | 38.23 | 6.60 | 1.37 | 5.70 | 0.82 | 4.47 | 0.81 | 2.34 | 0.36 | 2.47 | 0.37 | 0.79 | 17.17 | 5.26 | 2.16 | 211.82 | |
+95% | 153 | 1336 | 265 | 50.33 | 97.35 | 10.76 | 39.93 | 6.88 | 1.42 | 5.94 | 0.85 | 4.64 | 0.84 | 2.43 | 0.37 | 2.56 | 0.39 | 0.81 | 18.22 | 5.45 | 2.24 | 221.01 | |
−99% | 120 | 798 | 194 | 34.06 | 66.91 | 7.34 | 28.15 | 4.91 | 1.03 | 4.28 | 0.65 | 3.44 | 0.66 | 1.80 | 0.29 | 1.96 | 0.29 | 0.64 | 10.97 | 4.14 | 1.67 | 157.34 | |
+99% | 115 | 723 | 184 | 31.71 | 62.51 | 6.85 | 26.45 | 4.62 | 0.98 | 4.04 | 0.62 | 3.27 | 0.63 | 1.70 | 0.28 | 1.88 | 0.27 | 0.62 | 9.92 | 3.95 | 1.59 | 148.14 | |
Cañadón Largo Fm. | Mean | 147 | 1153 | 194 | 45.79 | 89.31 | 9.86 | 34.22 | 5.81 | 1.14 | 4.80 | 0.70 | 3.78 | 0.68 | 2.03 | 0.30 | 2.07 | 0.32 | 0.67 | 15.21 | 5.08 | 1.85 | 200.30 |
−95% | 162 | 1522 | 222 | 56.91 | 111.06 | 12.02 | 41.89 | 7.06 | 1.35 | 5.80 | 0.83 | 4.49 | 0.78 | 2.40 | 0.34 | 2.44 | 0.39 | 0.72 | 18.28 | 5.74 | 2.06 | 246.05 | |
+95% | 166 | 1645 | 232 | 60.91 | 118.88 | 12.80 | 44.64 | 7.50 | 1.43 | 6.16 | 0.87 | 4.74 | 0.81 | 2.53 | 0.36 | 2.57 | 0.41 | 0.74 | 19.38 | 5.97 | 2.13 | 262.48 | |
−99% | 133 | 784 | 167 | 34.68 | 67.55 | 7.70 | 26.54 | 4.57 | 0.92 | 3.80 | 0.58 | 3.07 | 0.58 | 1.65 | 0.26 | 1.71 | 0.26 | 0.63 | 12.14 | 4.43 | 1.65 | 154.55 | |
+99% | 129 | 661 | 157 | 30.68 | 59.74 | 6.92 | 23.79 | 4.13 | 0.84 | 3.44 | 0.54 | 2.82 | 0.54 | 1.52 | 0.24 | 1.58 | 0.23 | 0.61 | 11.04 | 4.20 | 1.57 | 138.12 | |
Laguna Colorada Fm. (Section IV) | Mean | 159 | 736 | 295 | 42.23 | 78.51 | 9.79 | 36.84 | 7.73 | 1.54 | 7.10 | 0.95 | 5.09 | 0.74 | 2.18 | 0.32 | 2.60 | 0.36 | 0.62 | 11.66 | 3.91 | 2.21 | 193.82 |
−95% | 255 | 1199 | 516 | 52.62 | 108.65 | 15.03 | 52.52 | 11.16 | 2.49 | 10.17 | 1.32 | 7.00 | 1.11 | 3.09 | 0.40 | 3.34 | 0.42 | 0.79 | 15.88 | 5.65 | 3.00 | 255.94 | |
+95% | 302 | 1421 | 622 | 58.52 | 125.79 | 18.48 | 61.43 | 13.11 | 3.03 | 11.92 | 1.54 | 8.08 | 1.60 | 3.61 | 0.50 | 3.75 | 0.46 | 0.89 | 18.28 | 6.64 | 3.45 | 291.26 | |
−99% | 63 | 273 | 74 | 31.85 | 48.37 | 4.55 | 21.16 | 4.30 | 0.59 | 4.03 | 0.58 | 3.18 | 0.36 | 1.26 | 0.24 | 1.87 | 0.29 | 0.45 | 7.44 | 2.16 | 1.42 | 131.70 | |
+99% | 17 | 51 | -31 | 25.94 | 31.23 | 1.11 | 12.24 | 2.35 | 0.05 | 2.29 | 0.36 | 2.10 | -0.13 | 0.74 | 0.13 | 1.45 | 0.25 | 0.35 | 5.04 | 1.17 | 0.97 | 96.38 | |
Roca Blanca Fm. (Section V) | Mean | 153 | 1123 | 158 | 36.58 | 70.15 | 7.66 | 27.95 | 4.40 | 0.90 | 3.84 | 0.54 | 3.08 | 0.59 | 1.63 | 0.27 | 1.71 | 0.27 | 0.68 | 14.87 | 5.25 | 1.87 | 159.56 |
−95% | 206 | 1609 | 190 | 49.79 | 92.42 | 10.11 | 35.77 | 5.50 | 1.04 | 5.04 | 0.66 | 3.92 | 0.78 | 2.23 | 0.37 | 2.46 | 0.37 | 0.85 | 19.32 | 6.73 | 2.32 | 208.66 | |
+95% | 230 | 1822 | 203 | 60.83 | 111.02 | 12.16 | 42.30 | 6.42 | 1.16 | 6.04 | 0.76 | 4.62 | 0.94 | 2.74 | 0.45 | 3.10 | 0.46 | 0.99 | 23.03 | 7.97 | 2.69 | 249.69 | |
−99% | 99 | 637 | 127 | 23.36 | 47.88 | 5.21 | 20.13 | 3.30 | 0.76 | 2.65 | 0.42 | 2.24 | 0.40 | 1.03 | 0.17 | 0.95 | 0.16 | 0.51 | 10.43 | 3.76 | 1.43 | 110.45 | |
+99% | 75 | 425 | 113 | 12.32 | 29.28 | 3.16 | 13.60 | 2.38 | 0.64 | 1.65 | 0.31 | 1.53 | 0.25 | 0.52 | 0.09 | 0.31 | 0.07 | 0.37 | 6.72 | 2.52 | 1.05 | 69.42 |