冀西北宣化盆地髫髻山组粗面岩年代学、地球化学特征及其地质意义
杨济远, 胡新茁, 周敬, 齐朋超, 李泽阳, 孟家葆, 许凡, 张会彬, 齐慧云

Chronology and geochemical characteristics of trachytes in the Tiaojishan Formation, Xuanhua Basin, northwestern Hebei Province, and their geological implications
YANG Ji-Yuan, HU Xin-Zhuo, ZHOU Jing, QI Peng-Chao, LI Ze-Yang, MENG Jia-Bao, XU Fan, ZHANG Hui-Bin, QI Hui-Yun
表2 粗面岩(D3511)锆石LA-ICP-MS年代学分析结果
Table 2 Chronological analysis results of trachyte (D3511) zircon by LA-ICP-MS
样品号 含量/10-6 同位素比值 年龄/Ma
Pb 232Th 238U Th/U 207Pb/
235U		 2σ 206Pb/
238U		 2σ 207Pb/
206Pb		 2σ 208Pb/
232Th		 2σ 206Pb/
238U		 2σ 207Pb/
235U		 2σ 208Pb/
232Th		 2σ
D3511-1* 7.7 151.8 187.0 0.81 0.24 0.035 0.0326 0.0008 0.05 0.0075 0.0112 0.0010 206.9 4.8 217.0 29.0 226.0 21.0
D3511-2 64.9 2168.0 1695.0 1.28 0.18 0.007 0.0256 0.0005 0.05 0.0016 0.0080 0.0002 162.8 2.8 167.0 5.7 161.3 3.4
D3511-3* 29.8 509.0 455.0 1.12 0.33 0.016 0.0452 0.0008 0.05 0.0026 0.0142 0.0004 285.1 4.8 285.0 12.0 285.8 7.3
D3511-4* 105.9 100.7 462.0 0.22 2.07 0.072 0.1869 0.0037 0.08 0.0028 0.0629 0.0033 1104.0 20.0 1136.0 24.0 1232.0 62.0
D3511-5* 15.6 117.4 206.1 0.57 0.46 0.044 0.0593 0.0013 0.06 0.0055 0.0186 0.0013 371.5 7.9 378.0 31.0 372.0 25.0
D3511-6* 19.1 331.2 498.0 0.67 0.21 0.017 0.0282 0.0008 0.05 0.0049 0.0087 0.0006 179.1 4.9 193.0 14.0 174.0 12.0
D3511-7* 15.7 207.2 241.0 0.86 0.34 0.026 0.0459 0.0010 0.05 0.0041 0.0149 0.0007 289.2 6.1 292.0 20.0 299.0 14.0
D3511-8* 13.2 250.8 190.6 1.32 0.35 0.033 0.0458 0.0013 0.06 0.0054 0.0138 0.0008 288.6 8.0 299.0 25.0 277.0 16.0
D3511-9* 34.1 490.0 486.0 1.01 0.37 0.016 0.0494 0.0009 0.05 0.0024 0.0153 0.0004 311.0 5.2 315.0 12.0 307.3 7.7
D3511-10 22.4 600.0 647.0 0.93 0.18 0.007 0.0255 0.0004 0.05 0.0021 0.0083 0.0002 162.4 2.4 165.8 6.3 166.7 4.4
D3511-11 16.6 351.7 503.4 0.70 0.18 0.010 0.0255 0.0005 0.05 0.0029 0.0078 0.0003 162.2 2.9 166.7 8.9 157.5 6.5
D3511-12* 29.2 502.0 441.0 1.14 0.35 0.033 0.0447 0.0013 0.06 0.0048 0.0141 0.0007 281.7 7.9 303.0 24.0 282.0 13.0
D3511-13 9.0 221.6 265.0 0.84 0.18 0.012 0.0257 0.0005 0.05 0.0032 0.0082 0.0003 163.5 3.1 164.0 10.0 165.5 6.4
D3511-14* 198.1 109.7 304.0 0.36 11.80 0.190 0.4927 0.0073 0.17 0.0022 0.1374 0.0028 2581.0 32.0 2586.0 15.0 2601.0 50.0
D3511-15 3.5 90.1 96.1 0.94 0.19 0.027 0.0253 0.0008 0.05 0.0074 0.0086 0.0006 161.1 4.7 168.0 23.0 174.0 13.0
D3511-16* 39.3 493.0 591.0 0.83 0.35 0.035 0.0473 0.0012 0.05 0.0056 0.0155 0.0008 297.6 7.2 303.0 26.0 310.0 16.0
D3511-17 45.6 699.0 596.0 1.17 0.65 0.028 0.0488 0.0009 0.10 0.0046 0.0192 0.0005 307.2 5.7 500.0 17.0 384.0 10.0
D3511-18* 234.3 342.3 311.5 1.10 11.59 0.190 0.4840 0.0074 0.17 0.0028 0.1335 0.0022 2543.0 32.0 2573.0 15.0 2532.0 40.0