Research Article
Isotopic Age of the Xiong’er Group Volcanic Rocks and Its Geological Significance in Western Henan, China
Table 1
Zircon U–Pb isotope test results.
| Number | Th | U | | 206Pbc | Age (Ma) | ppm | % | | | 207Pb/206Pb | | 206Pb/238U | |
| 1314-1 | 1 | 173 | 160 | 1.11 | 0.26 | | 0.77 | 0.11 | 0.9 | 0.31 | 1.1 | 2 | 125 | 115 | 1.12 | 0.70 | | 0.80 | 0.11 | 1.3 | 0.31 | 1.8 | 3 | 38 | 42 | 0.92 | 0.81 | | 0.66 | 0.12 | 1.7 | 0.32 | 1.8 | 4 | 110 | 216 | 0.53 | 0.11 | | 0.85 | 0.14 | 0.6 | 0.42 | 1.1 | 5 | 262 | 503 | 0.54 | 0.02 | | 0.91 | 0.15 | 0.4 | 0.45 | 0.9 | 6 | 94 | 121 | 0.80 | 0.07 | | 0.82 | 0.14 | 0.8 | 0.43 | 1.2 | 7 | 300 | 313 | 0.99 | 0.03 | | 0.87 | 0.13 | 0.5 | 0.41 | 10 | 8 | 62 | 131 | 0.49 | 0.20 | | 0.82 | 0.14 | 0.8 | 0.41 | 1.2 | 9 | 67 | 129 | 0.54 | 0.10 | | 0.82 | 0.14 | 0.8 | 0.43 | 1.2 | 10 | 134 | 214 | 0.65 | 0.04 | | 0.94 | 0.15 | 0.6 | 0.44 | 1.7 | 11 | 93 | 159 | 0.61 | 0.07 | | 0.72 | 0.15 | 1.0 | 0.44 | 1.1 | 12 | 252 | 364 | 0.72 | 0.01 | | 0.89 | 0.14 | 0.5 | 0.43 | 0.9 | 13 | 97 | 384 | 0.26 | 0.54 | | 0.83 | 0.13 | 0.5 | 0.29 | 0.9 | 14 | 141 | 128 | 1.13 | 0.37 | | 0.74 | 0.11 | 1.0 | 0.32 | 1.2 | 15 | 32 | 39 | 0.84 | 1.18 | | 0.72 | 0.11 | 3.6 | 0.31 | 4.1 | 16 | 62 | 96 | 0.67 | 0.12 | | 0.84 | 0.14 | 1.2 | 0.41 | 1.8 | CM3-5 | 1 | 34 | 41 | 0.85 | 0.87 | | 0.69 | 0.11 | 3.1 | 0.32 | 1.7 | 2 | 18 | 27 | 0.68 | 0.00 | | 0.64 | 0.12 | 2.2 | 0.31 | 2.0 | 3 | 30 | 38 | 0.83 | 24.22 | | 0.13 | 0.11 | 45.0 | 0.31 | 7.0 | 4 | 34 | 41 | 0.84 | 0.73 | | 0.66 | 0.11 | 2.8 | 0.32 | 1.7 | 5 | 20 | 29 | 0.69 | 0.74 | | 0.65 | 0.11 | 4.0 | 0.30 | 2.0 | 6 | 113 | 99 | 1.19 | 0.34 | | 0.73 | 0.11 | 1.5 | 0.31 | 1.3 | 7 | 70 | 73 | 0.99 | 1.26 | | 0.66 | 0.12 | 3.2 | 0.32 | 1.5 | 8 | 33 | 41 | 0.83 | 4.67 | | 0.58 | 0.13 | 10.0 | 0.31 | 2.6 | 9 | 51 | 51 | 1.04 | 1.63 | | 0.53 | 0.11 | 4.1 | 0.31 | 1.6 | 10 | 258 | 239 | 1.11 | 1.54 | | 0.46 | 0.12 | 2.9 | 0.33 | 1.1 | 11 | 43 | 45 | 0.99 | 21.44 | | 0.27 | 0.13 | 15.0 | 0.30 | 3.0 | CM5 | 1 | 115 | 191 | 0.62 | 0.05 | | 0.86 | 1.10 | 1.7 | 0.44 | 1.1 | 2 | 36 | 598 | 0.06 | 0.48 | | 0.71 | 2.30 | 1.0 | 0.36 | 0.9 | 3 | 46 | 46 | 1.03 | 0.44 | | 0.68 | 3.30 | 2.0 | 0.32 | 1.6 | 4 | 199 | 877 | 0.24 | 2.92 | | 0.17 | 2.40 | 2.6 | 0.24 | 1.5 | 5 | 88 | 109 | 0.84 | 4.06 | | 0.18 | 4.10 | 2.3 | 0.29 | 1.8 | 6 | 33 | 41 | 0.85 | — | | 0.73 | 1.80 | 5.0 | 0.32 | 1.9 | 7 | 129 | 122 | 1.09 | 0.09 | | 0.75 | 3.05 | 1.7 | 0.33 | 1.2 | 8 | 24 | 32 | 0.78 | 0.77 | | 0.71 | 3.26 | 1.9 | 0.30 | 2.2 | 9 | 50 | 49 | 1.05 | 0.50 | | 0.70 | 3.19 | 1.3 | 0.32 | 1.7 | 10 | 49 | 48 | 1.06 | 0.38 | | 0.68 | 3.10 | 1.5 | 0.32 | 1.6 | 11 | 31 | 40 | 0.81 | 0.22 | | 0.92 | 3.06 | 1.9 | 0.31 | 4.2 | 12 | 138 | 128 | 1.11 | 0.09 | | 0.79 | 3.16 | 1.6 | 0.33 | 1.3 | 13 | 23 | 32 | 0.76 | 0.83 | | 0.63 | 2.98 | 1.1 | 0.32 | 1.9 | 14 | 96 | 162 | 0.61 | 0.11 | | 0.84 | 1.48 | 1.6 | 0.44 | 1.1 |
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Note: Pbc and Pb indicate the common and radiogenic portions, respectively. indicates the error. |