LA-ICP-MS zircon U-Pb age and geological significance of granite porphyry and diorite in the Harizha polymetallic ore district, East Kunlun Mountains
-
摘要:
哈日扎多金属矿区具有多期成矿作用,成矿母岩为闪长岩、花岗斑岩和花岗岩。通过对闪长岩和花岗斑岩进行LAICP-MS锆石U-Pb测年,获得3个样品锆石年龄。样品TC22-3为闪长岩,年龄集中在413±5.4~433±5.5Ma之间,年龄加权平均值为424.7±4.8Ma;DK19-1为花岗斑岩,年龄集中在233±2.4~251±2.9Ma之间,年龄加权平均值为242.6±2.6Ma;DK23-1为花岗斑岩,206Pb/238U年龄集中在235±4.0~262±6.5Ma之间,年龄加权平均值为245.8±3.4Ma。样品DK23-1和DK19-1的锆石年龄代表印支期岩体年龄,与东昆仑地区印支期发生过较大规模岩浆活动事件相耦合,并且指示了哈日扎矿区主要的成矿年代;样品TC22-3形成时代为志留纪,记录了东昆仑早古生代的岩浆活动,也说明在志留纪该矿区已经发生了矿化现象。另外,东昆仑地区的晚志留世花岗岩可能与东昆仑早古生代洋盆闭合后的碰撞造山作用有关。
-
关键词:
- LA-ICP-MS锆石U-Pb定年 /
- 构造-岩浆活动 /
- 成矿作用 /
- 东昆仑
Abstract:The Harizha ore district has multiple periods of mineralization and the ore-forming parent rocks are granite porphyry, diorite and granite The authors obtained three zircon LA-ICP-MS U-Pb ages from diorite and granite porphyry. Samples TC22-3, DK19-1 and DK23-1 are dioritic granite porphyry and granite porphyry respectively. Sample TC22-3, DK19-1 and DK23-1 have the ages of 424.7±4.8Ma, 242.6±2.6Ma and 245.8±3.4Ma, respectively. Sample DK19-1 and DK23-1 ages belong to Indosinian period and reflect large-scale magmatic activities and also indicate major metallogenic chronology of the Harizha ore district. Sample TC22-3 records the Early Paleozoic magmatic events in the East Kunlun Mountains and can also explain the existence of the Silurian mineralization. The other Late Silurian granite was related to the collision orogenesis after closing of the Early Paleozoic ocean basin.
-
-
表 1 哈日扎矿区LA-ICP-MS锆石U-Th-Pb同位素测定结果
Table 1. The results of LA-ICP-MS zircon U-Th-Pb isotope from the Harizha ore district in East Kunlun Mountains
点号 232Th/10-6 238U/10-6 206Pb/10-6 Th/U 207Pb/206Pb 207Pb/235U 206Pb/238U 207Pb/206Pb 207Pb/235U 206Pb/238U 比值 1σ 比值 1σ 比值 1σ 年龄/Ma 1σ 年龄/Ma 1σ 年龄/Ma 1σ TC22-3闪长岩 03 1150 612 160 1.88 0.0578 0.0020 0.5309 0.0177 0.0661 0.0009 520 69.4 432 11.7 413 5.4 04 93 271 71 0.34 0.0574 0.0020 0.5403 0.0184 0.0678 0.0010 509 77.8 439 12.1 423 6.0 05 188 351 0 0.54 0.0574 0.0020 0.5307 0.0182 0.0667 0.0008 506 77.8 432 12.1 416 5.0 06 198 676 121 0.29 0.0563 0.0015 0.5374 0.0142 0.0688 0.0009 465 28.7 437 9.4 429 5.4 07 201 445 0 0.45 0.0576 0.0020 0.5372 0.0184 0.0673 0.0010 517 77.8 437 12.2 420 5.9 08 140 305 0 0.46 0.0552 0.0021 0.5139 0.0184 0.0675 0.0009 420 80.5 421 12.3 421 5.7 11 44 573 0 0.08 0.0548 0.0017 0.5223 0.0149 0.0692 0.0009 467 66.7 427 10.0 431 5.4 12 203 837 113 0.24 0.0571 0.0013 0.5454 0.0127 0.0688 0.0006 494 51.8 442 8.3 429 3.8 13 102 368 11 0.28 0.0572 0.0020 0.5497 0.0195 0.0695 0.0009 498 79.6 445 12.8 433 5.5 DK19-1花岗斑岩 01 460 814 53 0.56 0.0511 0.0015 0.2612 0.0075 0.0371 0.0004 243 68.5 236 6.0 235 2.7 02 412 763 0 0.54 0.0531 0.0017 0.2803 0.0083 0.0383 0.0005 345 102.8 251 6.6 242 2.9 04 555 901 0 0.62 0.0525 0.0015 0.2789 0.0080 0.0383 0.0004 306 66.7 250 6.3 242 2.6 05 589 860 0 0.69 0.0544 0.0019 0.2978 0.0098 0.0397 0.0005 387 77.8 265 7.7 251 2.9 06 610 964 16 0.63 0.0510 0.0018 0.2716 0.0095 0.0384 0.0004 243 76.8 244 7.6 243 2.6 08 355 751 36 0.47 0.0506 0.0016 0.2650 0.0083 0.0378 0.0004 233 74.1 239 6.7 239 2.6 09 425 725 30 0.59 0.0521 0.0016 0.2840 0.0085 0.0394 0.0005 300 73.1 254 6.7 249 2.8 10 412 721 46 0.57 0.0546 0.0017 0.2976 0.0089 0.0395 0.0005 398 70.4 265 7.0 250 2.9 11 486 848 45 0.57 0.0545 0.0016 0.2904 0.0079 0.0386 0.0004 391 63.0 259 6.2 244 2.5 12 395 642 0 0.61 0.0531 0.0017 0.2786 0.0094 0.0378 0.0005 345 75.9 250 7.5 239 3.0 13 906 1017 35 0.89 0.0524 0.0014 0.2705 0.0071 0.0374 0.0004 302 63.0 243 5.7 237 2.8 14 517 796 58 0.65 0.0528 0.0019 0.2865 0.0100 0.0393 0.0004 320 115.7 256 7.9 249 2.7 15 341 414 43 0.82 0.0523 0.0022 0.2839 0.0119 0.0392 0.0006 298 91.7 254 9.4 248 3.5 16 484 794 43 0.61 0.0506 0.0014 0.2584 0.0071 0.0369 0.0004 220 64.8 233 5.7 233 2.4 18 249 495 61 0.50 0.0512 0.0022 0.2726 0.0112 0.0387 0.0006 250 100.0 245 9.0 245 3.8 19 353 481 42 0.73 0.0511 0.0020 0.2695 0.0102 0.0381 0.0005 256 95.4 242 8.2 241 3.1 21 501 771 27 0.65 0.0518 0.0018 0.2735 0.0088 0.0382 0.0005 280 77.8 245 7.0 242 3.3 22 531 901 0 0.59 0.0514 0.0016 0.2682 0.0077 0.0378 0.0005 257 70.4 241 6.2 239 2.9 DK23-1花岗斑岩 01 119 229 59 0.52 0.0528 0.0029 0.2765 0.0149 0.0379 0.0006 320 124.1 248 11.9 240 3.9 02 138 198 0 0.70 0.0547 0.0039 0.2842 0.0184 0.0383 0.0007 398 159.2 254 14.5 242 4.5 03 102 104 0 0.98 0.0558 0.0048 0.3066 0.0245 0.0409 0.0011 456 194.4 272 19.1 258 6.6 04 70 130 60 0.54 0.0547 0.0047 0.2898 0.0218 0.0399 0.0011 398 196.3 258 17.2 252 6.7 05 167 255 0 0.65 0.0515 0.0024 0.2666 0.0119 0.0376 0.0006 261 107.4 240 9.5 238 3.7 06 116 237 35 0.49 0.0503 0.0026 0.2573 0.0131 0.0371 0.0006 209 120.4 232 10.6 235 4.0 07 176 213 38 0.83 0.0522 0.0028 0.2938 0.0152 0.0406 0.0007 300 120.4 262 11.9 257 4.3 08 207 264 0 0.78 0.0504 0.0030 0.2658 0.0154 0.0382 0.0005 213 137.0 239 12.4 242 3.3 10 182 331 27 0.55 0.0520 0.0022 0.2897 0.0115 0.0405 0.0007 287 100.9 258 9.1 256 4.2 11 268 370 0 0.72 0.0533 0.0026 0.2816 0.0135 0.0384 0.0006 343 111.1 252 10.7 243 3.6 12 235 335 62 0.70 0.0551 0.0023 0.3067 0.0124 0.0406 0.0006 417 94.4 272 9.6 257 3.4 13 606 1004 8 0.60 0.0522 0.0016 0.2845 0.0088 0.0395 0.0004 295 65.7 254 7.0 250 2.8 14 101 164 78 0.62 0.0514 0.0033 0.2719 0.0163 0.0384 0.0007 261 180.5 244 13.0 243 4.2 15 117 224 0 0.52 0.0522 0.0037 0.2702 0.0180 0.0384 0.0007 295 161.1 243 14.4 243 4.1 18 423 781 0 0.54 0.0516 0.0016 0.2743 0.0081 0.0387 0.0004 333 75.0 246 6.5 245 2.8 20 179 344 0 0.52 0.0529 0.0019 0.2877 0.0102 0.0395 0.0005 324 113.9 257 8.0 250 3.4 21 104 119 0 0.87 0.0540 0.0046 0.3048 0.0245 0.0414 0.0010 372 192.6 270 19.0 262 6.5 22 363 592 8 0.61 0.0526 0.0018 0.2779 0.0101 0.0379 0.0004 322 79.6 249 8.0 240 2.6 表 2 哈日扎矿区锆石稀土元素含量
Table 2. Zircon REE content of the Harizha ore district in East Kunlun Mountains
10-6 样品 La Ce Pr Nd Sm Eu Gd Tb Dy Ho Er Tm Yb Lu TC22-3闪长岩 03 0.02 1.36 0.01 0.17 1.16 0.49 11.69 4.91 74.94 33.69 169.86 42.28 435.88 94.41 04 0.01 0.35 0.03 0.08 0.29 0.18 2.53 1.11 16.41 7.07 35.53 9.40 103.43 22.86 05 < 0.01 0.41 0.03 0.18 0.44 0.19 3.42 1.42 20.16 8.98 46.63 12.43 138.84 31.97 06 < 0.01 0.43 0.01 0.30 0.61 0.43 3.18 1.29 18.56 9.18 50.87 14.05 154.71 34.57 07 0.06 1.02 0.27 1.07 2.38 2.23 7.48 2.59 34.04 12.54 61.70 14.65 150.84 30.84 08 < 0.01 0.57 0.03 0.28 0.57 0.26 3.85 1.76 22.25 10.03 48.47 12.64 128.87 28.22 11 < 0.01 0.32 0.02 0.03 0.48 0.22 3.51 1.41 21.49 9.98 52.22 14.21 157.96 35.65 12 < 0.01 0.60 0.02 0.33 0.82 0.41 4.43 1.77 25.92 12.96 77.91 21.82 249.06 56.97 13 < 0.01 0.43 0.02 0.09 0.45 0.23 3.18 1.38 21.35 9.10 46.35 12.65 133.34 29.52 DK19-1花岗斑岩 01 0.77 16.32 2.14 2.52 2.71 0.53 14.34 5.52 75.78 31.76 159.43 39.91 421.43 82.10 02 8.35 28.85 18.12 11.77 4.30 0.65 13.48 4.93 66.84 28.58 143.63 37.51 411.37 79.97 04 23.59 57.35 51.62 32.10 7.38 0.62 14.91 5.28 66.72 26.94 130.27 33.29 340.76 66.17 05 0.26 15.21 0.80 1.38 3.53 0.62 13.36 5.54 76.29 30.57 144.97 35.66 359.17 69.99 06 10.21 37.38 27.63 16.24 5.15 0.49 16.98 5.86 75.17 30.85 146.31 36.89 376.64 70.61 08 0.70 13.54 1.85 1.93 2.12 0.31 11.41 4.59 64.53 28.12 141.59 37.30 401.82 79.06 09 1.20 16.50 3.69 3.81 4.34 0.79 20.14 7.50 102.05 41.26 196.48 49.97 516.49 98.47 10 0.13 12.92 0.59 1.04 2.10 0.26 9.58 3.69 50.89 21.47 108.18 28.44 300.31 60.97 11 1.00 18.01 4.18 4.34 3.32 0.35 12.65 4.46 62.43 25.54 126.78 33.22 344.09 67.31 12 6.95 26.59 14.27 9.74 3.76 0.61 13.48 5.00 65.11 26.66 130.41 32.36 338.54 64.18 13 0.40 17.84 2.07 3.51 5.06 0.90 23.32 9.02 116.49 44.16 204.25 49.17 482.64 89.22 14 17.75 45.51 35.44 21.36 5.28 0.60 12.35 4.28 58.90 23.87 117.29 28.60 304.47 58.80 15 1.49 11.84 2.75 4.81 7.19 1.55 30.11 10.85 134.27 48.49 217.48 50.60 496.32 90.28 16 1.35 17.57 2.92 3.03 2.78 0.57 15.48 5.74 75.94 31.69 155.45 39.30 400.16 76.66 18 0.03 8.08 0.53 1.95 3.48 0.80 16.71 7.20 92.16 40.05 193.24 47.09 474.77 90.21 19 2.65 10.47 0.70 1.53 2.43 0.71 12.08 4.94 63.49 25.63 122.49 28.66 301.47 57.62 21 0.18 14.66 0.62 1.56 2.31 0.43 11.83 4.39 57.35 23.85 116.61 29.89 319.52 62.83 22 1.65 16.87 4.07 3.50 2.87 0.44 12.41 5.08 69.56 28.74 143.08 35.51 363.21 69.67 DK23-1花岗斑岩 01 0.02 11.14 0.20 0.77 2.82 0.40 18.04 6.98 96.52 41.43 186.51 43.23 417.79 75.33 02 156.34 335.03 409.20 291.56 61.94 4.69 67.82 14.07 138.62 48.72 199.35 45.17 413.26 74.10 03 0.03 6.87 2.73 5.15 9.10 2.86 37.86 13.18 153.70 57.29 249.69 52.90 487.54 85.80 04 5.90 21.18 14.33 12.24 6.37 1.06 22.90 8.35 110.53 44.87 212.14 49.25 473.01 88.92 05 22.02 58.19 57.62 38.72 11.80 0.89 26.94 8.90 112.92 44.12 192.90 43.44 407.98 70.85 06 0.01 13.80 0.58 1.20 3.67 0.58 21.71 8.02 109.56 45.31 206.69 48.22 469.44 85.74 07 0.02 9.55 1.76 5.09 12.06 1.93 50.04 17.41 214.53 80.00 336.68 71.44 646.51 110.59 08 0.19 14.88 1.70 3.46 6.79 1.34 36.01 13.71 176.29 70.43 317.43 72.25 689.32 124.61 10 0.01 10.87 0.19 0.99 3.03 0.56 17.29 7.07 107.49 45.75 222.82 55.52 571.79 109.34 11 0.55 17.82 2.18 3.15 5.10 0.89 26.15 10.61 150.97 64.32 304.75 76.73 758.51 142.18 12 0.95 16.73 3.66 5.18 7.58 1.24 38.19 14.33 186.76 73.44 338.33 77.98 733.24 130.75 13 0.07 18.57 0.45 1.13 6.57 0.63 49.04 21.42 306.77 127.88 594.38 138.56 1341.35 236.15 14 0.05 10.82 0.45 1.31 2.87 0.52 16.43 6.50 86.44 35.34 163.97 38.11 374.05 68.49 15 0.01 10.52 0.62 1.52 3.56 0.55 19.87 8.14 107.72 44.65 200.31 45.44 433.63 78.76 18 39.98 114.19 132.73 100.92 28.17 0.53 49.60 15.40 178.81 68.22 304.21 67.25 630.28 109.46 20 0.02 15.63 0.53 1.39 3.50 0.44 20.95 8.78 115.48 48.77 227.57 52.59 510.54 91.76 21 0.04 9.97 0.62 1.69 3.80 0.94 20.01 7.31 94.65 36.66 163.75 37.78 346.91 63.04 22 0.07 16.25 0.69 1.45 4.31 0.25 26.27 10.69 147.39 58.83 268.19 62.41 582.14 100.87 -
[1] 袁万明, 莫宣学, 喻学慧, 等.东昆仑印支期区域构造背景的花岗岩记录[J].地质论评, 2000, 46(2): 203-211. http://www.cnki.com.cn/Article/CJFDTOTAL-DZLP200002012.htm
[2] 袁万明, 莫宣学, 王世成, 等.东昆仑金成矿作用与区域构造演化的关系[J].地质与勘探, 2003, 39(3): 5-8. http://www.cnki.com.cn/Article/CJFDTOTAL-DZKT200303001.htm
[3] 袁万明, 莫宣学, 喻学惠, 等.东昆仑早石炭世火山岩的地球化学特征及其构造背景[J].岩石矿物学杂志, 1998, 17(4): 289-295. http://www.cnki.com.cn/Article/CJFDTOTAL-YSKW804.000.htm
[4] 莫宣学.青藏高原地质研究的回顾与展望[J].中国地质, 2010, 37 (4): 841-853. http://www.cnki.com.cn/Article/CJFDTOTAL-DIZI201004004.htm
[5] Sláma J, Condon D J, Crowley J L, et al. Plešovice zircon—a new nature reference material for U-Pb and Hf isotopic microanalysis[J]. Chemical Geology, 2008, 259: 1-35. https://www.researchgate.net/publication/292726909_Plesovice_zircon-A_new_natural_reference_material_for_U-Pb_and_Hf_isotopic_microanalysis
[6] Scherer E E, Cameron K L, Blichert-toft J. Lu-Hf garment geochronology: closuer temperature relative to the Sm-Nd system and the effects of trace mineral inclusions[J]. Geochim. Cosmochim. Acta, 2000, 64: 3413-3432. doi: 10.1016/S0016-7037(00)00440-3
[7] Jackson S E, Person N J, Griffin W L, et al. The application of laser ablation-inductively couple plasma-mass spectrometry to in situ UPb zircon geochronology[J]. Chemical Geology, 2004, 211: 47-69. doi: 10.1016/j.chemgeo.2004.06.017
[8] Anderson T. Correction of common lead in U-Pb analyses that do not report 204Pb[J]. Chemical Geology, 2002, 192: 59-79. doi: 10.1016/S0009-2541(02)00195-X
[9] Ludwig K R. User' s Manual for Isoplot 3. 00. A Geochronological Toolkit for Micsoft Excel[M]. Berkeley Geochronological Center, Berkeley, CA. Special Publication, 2003.
[10] 吴元保, 陈道公, 夏群科, 等.大别山黄镇榴辉岩锆石的微区微量元素分析:榴辉岩相变质锆石的微量元素特征[J].科学通报, 2002, 47(11): 859-863. doi: 10.3321/j.issn:0023-074X.2002.11.013
[11] Gebauer D A. P-T-t path for an (Ultra-?)high-pressure ultramafic-Maficrock-association and its felsic country-rocks based onSHRIMP-dating of magmatic and metamorphic zircon domains. Example: Alpe Arami(Central Swiss Alps) [C]//Earth ProcessesReading the Isotopic Code, Geophysical Monograph, 1996, 95: 307-329.
[12] Hidaka H, Shimizu H, Adachi M. U-Pb geochronology andREE geochemistry of zircons from Palaeoproterozoic paragneissclasts in the Mesozoic Kamiaso conglomerate, central Japan: Evidence for an Archean provenance[J]. Chemical Geology, 2002, 187: 278-293. http://www.sciencedirect.com/science/article/pii/S000925410200058X
[13] Pearce J A, Harris N B W, Tindle A G. Trace element discrimination diagrams for the tectonic interpretation of granitic rocks[J]. Journal of Petrology, 1984, 25(4): 956-983. doi: 10.1093/petrology/25.4.956
[14] 郭正府, 邓晋福.青藏东昆仑晚古生代末—中生代中酸性火成岩与陆内造山过程[J].现代地质, 1998, 12(3): 344-352. http://www.cnki.com.cn/Article/CJFDTOTAL-XDDZ803.006.htm
[15] 谌宏伟, 罗照华, 莫宣学, 等.东昆仑造山带三叠纪岩浆混合成因花岗岩的岩浆底侵作用机制[J].中国地质, 2005, 32(3): 386-395. http://www.cnki.com.cn/Article/CJFDTOTAL-DIZI200503006.htm
[16] 丰成友, 王松, 李国臣, 等, 青海祁漫塔格中晚三叠世花岗岩年代学、地球化学及成矿意义[J].岩石学报, 2012, 28(2): 665-678. http://www.cnki.com.cn/Article/CJFDTOTAL-YSXB201202025.htm
[17] 陈宣华, 尹安, Gehrel G, 等.柴达木盆地东部基底花岗岩类岩浆活动的化学地球动力学[J].地质学报, 2011, 85(2): 157-171. http://www.cnki.com.cn/Article/CJFDTOTAL-DZXE201102002.htm
[18] 刘成东, 周肃, 莫宣学, 等.东昆仑造山带后碰撞花岗岩岩石地球化学和40Ar/39Ar同位素年代学约束[J].华东地质学院学报, 2003, 26(4): 301-305. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=hddz200304000&dbname=CJFD&dbcode=CJFQ
[19] 许志琴, 杨经绥, 李海兵, 等.造山的高原——青藏高原地体的拼合、碰撞造山及隆升机制[M].北京:地质出版社, 2007.
[20] 潘裕生, 周伟明, 许荣华, 等.昆仑山早古生代地质特征与演化[J].中国科学(D辑), 1996, 26(4): 302-307. http://www.cnki.com.cn/Article/CJFDTOTAL-JDXK199604002.htm
[21] 陆露, 张延林, 吴珍汉, 等.东昆仑早古生代花岗岩锆石U-Pb年龄及其地质意义[J].地球学报, 2013, 34(4): 447-454. doi: 10.3975/cagsb.2013.04.07
[22] 袁万明, 王世成, 王兰芬.东昆仑五龙沟金矿床成矿热历史的裂变经济热年代学证据[J].地球学报, 2000, 21(4): 389-395. http://www.cnki.com.cn/Article/CJFDTOTAL-DQXB200004008.htm
[23] 范丽坤, 蔡岩萍, 梁海川, 等.东昆仑地质构造及地球动力演化特征[J].地质调查与研究, 2009, 33(3): 181-186. http://www.cnki.com.cn/Article/CJFDTOTAL-QHWJ200903009.htm
[24] 莫宣学, 罗照华, 邓晋福, 等.东昆仑造山带花岗岩及地壳生长[J].高校地质学报, 2007, 13(3): 403-414. http://www.cnki.com.cn/Article/CJFDTOTAL-GXDX200703005.htm
[25] 王国灿, 王青海, 简平, 等.东昆仑前寒武纪基底变质岩系的锆石SHRIMP年龄及其构造意义[J].地质通报, 2004, 26(8): 929-937. http://www.cnki.com.cn/Article/CJFDTOTAL-DXQY200404019.htm
[26] 朱云海, 林启祥, 贾春兴, 等.东昆仑造山带早古生代火山岩锆石SHRIMP年龄及其地质意义[J].中国科学(D辑), 2005, 35(12): 1112-1119. doi: 10.3969/j.issn.1674-7240.2005.12.002
[27] 陆露, 误诊汉, 胡道功, 等.东昆仑牦牛山组流纹岩锆石U-Pb年龄及构造意义[J].岩石学报, 2010, 26(4): 1150-1158. http://www.cnki.com.cn/Article/CJFDTOTAL-YSXB201004013.htm
[28] 张耀玲, 胡道功, 石玉若, 等.东昆仑造山带牦牛山组火山岩SHRIMP锆石U-Pb年龄及构造意义[J].地质通报, 2010, 29 (11): 1614-1618. doi: 10.3969/j.issn.1671-2552.2010.11.003 http://www.cnki.com.cn/Article/CJFDTOTAL-ZQYD201011004.htm
[29] 宋忠宝, 张雨莲, 陈向阳, 等.东昆仑哈日扎含矿花岗闪长斑岩LA-ICP-MS锆石U-Pb定年及地质意义[J].矿床地质, 2013, 32 (1): 157-168. http://www.cnki.com.cn/Article/CJFDTOTAL-KCDZ201301014.htm
-