东昆仑祁漫塔格地区库德尔特金矿区花岗闪长岩的时代、成因及其构造意义
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张勇,张爱奎,何书跃,刘智刚,刘永乐,张鹏,孙非非
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Age,Petrogenesis and Tectonic Significance of Granodiorite in Kudeerte Gold Deposit,Qimantage Area,East Kunlun
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Yong ZHANG,Aikui ZHANG,Shuyue HE,Zhigang LIU,Yongle LIU,Peng ZHANG,Feifei SUN
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表2 库德尔特金矿床花岗闪长岩锆石LA-ICP-MS U-Pb同位素分析结果
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Table 2 LA-ICP-MS U-Pb isotopic analysis results of zircon from the granodiorite in Kudeerte gold deposit
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测点 | 元素含量/(×10-6) | Th/U | 同位素比值 | 表面年龄/Ma |
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U | Th | Pb | 207Pb/206Pb | 1σ | 207Pb/235U | 1σ | 206Pb/238U | 1σ | 207Pb/206Pb | 1σ | 207Pb/235U | 1σ | 206Pb/238U | 1σ |
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1 | 572 | 378 | 29 | 0.66 | 0.05210 | 0.00100 | 0.2817 | 0.0056 | 0.03921 | 0.00030 | 290 | 44 | 252 | 4 | 248 | 2 | 2 | 469 | 289 | 22 | 0.62 | 0.05116 | 0.00113 | 0.2695 | 0.0057 | 0.03843 | 0.00048 | 248 | 51 | 242 | 5 | 243 | 3 | 3 | 507 | 326 | 22 | 0.64 | 0.05181 | 0.00163 | 0.2696 | 0.0074 | 0.03817 | 0.00072 | 277 | 72 | 242 | 6 | 241 | 4 | 4 | 505 | 345 | 24 | 0.68 | 0.05136 | 0.00077 | 0.2686 | 0.0044 | 0.03793 | 0.00036 | 257 | 34 | 242 | 3 | 240 | 2 | 5 | 679 | 351 | 29 | 0.52 | 0.05204 | 0.00152 | 0.2732 | 0.0077 | 0.03848 | 0.00072 | 287 | 67 | 245 | 6 | 243 | 4 | 6 | 664 | 531 | 29 | 0.80 | 0.05118 | 0.00189 | 0.2672 | 0.0083 | 0.03816 | 0.00055 | 249 | 85 | 240 | 7 | 241 | 3 | 7 | 679 | 473 | 30 | 0.70 | 0.05250 | 0.00174 | 0.2715 | 0.0089 | 0.03803 | 0.00084 | 307 | 75 | 244 | 7 | 241 | 5 | 8 | 669 | 416 | 31 | 0.62 | 0.05110 | 0.00089 | 0.2683 | 0.0046 | 0.03817 | 0.00035 | 245 | 40 | 241 | 4 | 241 | 2 | 9 | 801 | 334 | 60 | 0.42 | 0.05447 | 0.00051 | 0.4991 | 0.0067 | 0.06640 | 0.00069 | 391 | 21 | 411 | 5 | 414 | 4 | 10 | 564 | 315 | 24 | 0.56 | 0.05117 | 0.00134 | 0.2695 | 0.0073 | 0.03827 | 0.00064 | 248 | 60 | 242 | 6 | 242 | 4 | 11 | 632 | 405 | 28 | 0.64 | 0.05313 | 0.00089 | 0.2857 | 0.0065 | 0.03905 | 0.00065 | 334 | 38 | 255 | 5 | 247 | 4 | 12 | 831 | 610 | 37 | 0.73 | 0.05088 | 0.00075 | 0.2693 | 0.0052 | 0.03836 | 0.00053 | 236 | 34 | 242 | 4 | 243 | 3 | 13 | 1 463 | 520 | 57 | 0.36 | 0.05150 | 0.00155 | 0.2715 | 0.0069 | 0.03843 | 0.00092 | 263 | 69 | 244 | 5 | 243 | 6 | 14 | 652 | 352 | 27 | 0.54 | 0.05103 | 0.00130 | 0.2685 | 0.0063 | 0.03836 | 0.00087 | 242 | 59 | 242 | 5 | 243 | 5 | 15 | 565 | 304 | 24 | 0.54 | 0.05152 | 0.00109 | 0.2694 | 0.0063 | 0.03817 | 0.00081 | 264 | 49 | 242 | 5 | 241 | 5 | 16 | 879 | 572 | 37 | 0.65 | 0.05127 | 0.00138 | 0.2703 | 0.0057 | 0.03849 | 0.00088 | 253 | 62 | 243 | 5 | 243 | 5 | 17 | 917 | 754 | 42 | 0.82 | 0.05141 | 0.00115 | 0.2814 | 0.0063 | 0.03994 | 0.00094 | 259 | 52 | 252 | 5 | 252 | 6 | 18 | 753 | 326 | 31 | 0.43 | 0.05184 | 0.00172 | 0.2746 | 0.0064 | 0.03893 | 0.00094 | 278 | 76 | 246 | 5 | 246 | 6 | 19 | 1 549 | 666 | 62 | 0.43 | 0.05527 | 0.00142 | 0.2953 | 0.0048 | 0.03899 | 0.00088 | 423 | 57 | 263 | 4 | 247 | 5 | 20 | 528 | 319 | 23 | 0.60 | 0.05567 | 0.00139 | 0.2962 | 0.0071 | 0.03897 | 0.00090 | 439 | 56 | 263 | 6 | 246 | 6 | 21 | 563 | 312 | 24 | 0.55 | 0.05168 | 0.00123 | 0.2718 | 0.0053 | 0.03859 | 0.00087 | 271 | 55 | 244 | 4 | 244 | 5 | 22 | 478 | 231 | 20 | 0.48 | 0.05171 | 0.00152 | 0.2696 | 0.0070 | 0.03831 | 0.00085 | 273 | 67 | 242 | 6 | 242 | 5 | 23 | 370 | 159 | 15 | 0.43 | 0.05172 | 0.00123 | 0.2725 | 0.0055 | 0.03852 | 0.00057 | 273 | 55 | 245 | 4 | 244 | 4 | 24 | 525 | 485 | 25 | 0.92 | 0.05078 | 0.00080 | 0.2696 | 0.0047 | 0.03852 | 0.00040 | 231 | 37 | 242 | 4 | 244 | 2 | 25 | 605 | 361 | 28 | 0.60 | 0.05076 | 0.00102 | 0.2690 | 0.0056 | 0.03831 | 0.00027 | 230 | 47 | 242 | 4 | 242 | 2 | 26 | 569 | 337 | 24 | 0.59 | 0.05186 | 0.00143 | 0.2693 | 0.0071 | 0.03792 | 0.00085 | 279 | 63 | 242 | 6 | 240 | 5 | 27 | 730 | 396 | 30 | 0.54 | 0.05490 | 0.00137 | 0.2854 | 0.0069 | 0.03796 | 0.00080 | 408 | 56 | 255 | 5 | 240 | 5 | 28 | 560 | 335 | 24 | 0.60 | 0.05129 | 0.00105 | 0.2778 | 0.0083 | 0.03928 | 0.00081 | 254 | 47 | 249 | 7 | 248 | 5 | 29 | 559 | 268 | 25 | 0.48 | 0.05109 | 0.00134 | 0.2742 | 0.0074 | 0.03879 | 0.00066 | 245 | 60 | 246 | 6 | 245 | 4 | 30 | 686 | 600 | 31 | 0.87 | 0.05207 | 0.00152 | 0.2714 | 0.0095 | 0.03803 | 0.00080 | 289 | 67 | 244 | 8 | 241 | 5 |
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