Magmatic evolution and formation age of the Pobei mafic-ultramafic intrusion on the northeastern margin of the Tarim plate
-
摘要:
坡北基性-超基性岩体位于塔里木板块东北缘，出露面积约180 km2，岩浆分异充分，主要岩性包括橄榄岩、橄榄辉长岩、辉长苏长岩、辉长岩等。锆石U-Pb测年结果显示，辉长岩结晶年龄为277.1±2.2 Ma，辉长苏长岩结晶年龄为273.5±2.9 Ma，橄榄辉长岩结晶年龄为275.5±1.5 Ma，含斜长石橄榄岩结晶年龄为280±2 Ma，不同类型岩石形成年龄集中在270~280 Ma，与塔里木地幔柱在时间和空间上具有一定耦合性。矿物地球化学数据显示，纯橄榄岩中橄榄石Fo(镁铁比值)值最高，达到90.9%；单斜辉石成分在不同类型的岩石中相似，MgO和CaO含量连续变化，且呈负相关关系，指示其具有相似的原始岩浆成分；不同类型岩石的微量元素蛛网图与稀土元素配分图变化一致，表明其为同源岩浆演化；Sr-Nd同位素地球化学图解显示，坡北岩体源自亏损地幔，经历了4%~15%下地壳物质的混染。综合研究认为，坡北基性-超基性杂岩体不同岩相具有过渡或侵入接触关系，形成时代相近，具有同源岩浆演化特征，但是岩浆就位顺序不同，地壳混染程度存在差异。
Abstract:The Pobei mafic-ultramafic intrusion is located on the northeastern margin of the Tarim plate and has an outcrop area of 180 km2. The magma differentiation was sufficient with the main lithologies consisting of such rocks as peridotite, olivine gabbro, gabbro norite, and gabbro, during the formation of the Pobei intrusion. Zircon U-Pb geochronology indicates that crystallization ages of gabbro, gabbro norite, olivine gabbro and plagioclase-bearing peridotite are 277.1±2.2 Ma, 273.5±2.9 Ma, 275.5±1.5 Ma and 280±2 Ma, respectively. The ages for the different types of rocks are concentrated at 270~280 Ma, which are temporally and spatially consistent with the age of the Tarim mantle plume. Mineral geochemical data suggest that olivine from the dunite has the highest Fo values, with maximum at 90.9%; clinopyroxene has similar concentrations in different types of rocks, with consistent negative relations between MgO and CaO, indicating similar primitive magma components. Moreover, these different rocks have similar variations for their trace and rare earth elements in spider pattern diagrams, suggesting that these rocks evolved from the same parental magma. Sr-Nd isotopic data indicate that the Pobei intrusion was sourced from depleted mantle and contaminated by 4%~15% lower crustal materials during magma ascent. Combined with published data and data obtained from this study, the authors hold that different lithofacies of the Pobei mafic-ultramafic intrusive complex have transitional or intrusive contact relation, similar formation ages and co-magmatic evolution characteristics, but they also have different emplacement sequences and degrees of crustal contamination.
-
Key words:
- magmatic evolution /
- crustal contamination /
- zircon U-Pb age /
- Pobei intrusion
-
-
表 1 坡北岩体中不同岩相SHRIMP锆石U-Th-Pb定年结果
Table 1. SHRIMP U-Th-Pb isotopic dating results for the zircon from different lithofacies of the Pobei intrusion
测点编号 含量/10-6 Th/U 同位素比值 年龄/Ma 206Pb 232Th 238U 207Pb/206Pb 1σ/±% 207Pb/235U 1σ/±% 206Pb/238U 1σ/±% 206Pb/238U 1σ 含斜长石橄榄岩(PB2-1) PB2-1 17.1 77 438 0.18 0.0504 3.0 0.314 3.3 0.04526 1.3 285.4 3.7 PB2-2 8.67 38 222 0.18 0.0539 2.6 0.339 3.0 0.04560 1.4 287.4 4.1 PB2-3 10.4 46 271 0.17 0.0495 2.7 0.3052 3.0 0.04470 1.4 281.9 3.9 PB2-4 13.4 75 355 0.22 0.0484 4.1 0.291 4.3 0.04356 1.4 274.8 3.7 PB2-5 7.87 52 212 0.26 0.0577 5.5 0.346 5.7 0.04343 1.5 274.1 4.0 PB2-6 7.26 29 186 0.16 0.0497 3.4 0.310 3.7 0.04529 1.5 285.5 4.2 PB2-7 10.4 48 273 0.18 0.0494 4.8 0.302 5.0 0.04429 1.4 279.4 3.9 PB2-8 18.8 133 492 0.28 0.0489 2.3 0.3006 2.7 0.04454 1.3 280.9 3.7 PB2-9 14.9 63 389 0.17 0.0539 2.0 0.3314 2.5 0.04456 1.4 281.0 3.9 PB2-10 14.5 52 372 0.15 0.0489 2.7 0.3037 3.1 0.04505 1.4 284.1 3.8 PB2-11 9.62 43 250 0.18 0.0479 7.5 0.295 7.7 0.04460 1.8 281.3 4.9 PB2-12 6.57 150 196 0.79 0.0543 4.2 0.293 4.5 0.03917 1.7 247.7 4.0 PB2-13 12.1 91 321 0.29 0.0555 3.9 0.336 4.3 0.04390 1.8 277.0 4.8 PB2-14 5.15 110 154 0.74 0.0538 3.4 0.289 3.8 0.03900 1.5 246.6 3.7 PB2-15 18.9 177 508 0.36 0.0508 2.4 0.3031 2.7 0.04328 1.3 273.1 3.6 PB2-16 21.4 113 564 0.21 0.0524 2.3 0.3184 2.7 0.04407 1.4 278.0 3.8 PB2-17 4.61 96 128 0.77 0.0453 13 0.257 13 0.0412 2.7 260.2 6.9 PB2-18 6.57 155 192 0.84 0.0468 4.9 0.256 5.1 0.03961 1.5 250.4 3.7 PB2-19 6.95 132 211 0.65 0.0413 9.0 0.216 9.1 0.03790 1.5 239.8 3.6 PB2-20 7.99 188 241 0.81 0.0530 3.1 0.282 3.4 0.03852 1.5 243.7 3.5 PB2-21 6.17 27 165 0.17 0.0459 9.2 0.273 9.3 0.04312 1.6 272.2 4.2 辉长苏长岩(PD27-2) Pd27-2-1 29.9 186 826 0.23 0.05058 1.5 0.2938 2.1 0.04213 1.5 266.0 3.9 Pd27-2-2 14.0 305 332 0.95 0.0521 2.1 0.3523 2.5 0.04902 1.4 308.5 4.1 Pd27-2-3 13.7 117 362 0.33 0.0505 3.1 0.306 3.4 0.04388 1.4 276.8 3.8 Pd27-2-4 7.21 294 185 1.64 0.0489 8.2 0.303 8.5 0.04503 2.1 284.0 5.8 Pd-27-2-5 12.2 284 295 0.99 0.0502 3.7 0.331 3.9 0.04783 1.4 301.2 4.1 Pd-27-2-6 15.2 349 410 0.88 0.0502 3.0 0.2981 3.3 0.04306 1.4 271.8 3.8 Pd-27-2-7 10.00 71 288 0.25 0.0531 2.3 0.2967 2.7 0.04053 1.4 256.1 3.6 Pd27-2-8 6.05 51 176 0.30 0.0458 6.1 0.250 6.3 0.03949 1.7 249.7 4.1 Pd27-2-9 17.9 143 487 0.30 0.0508 2.0 0.2988 2.4 0.04269 1.3 269.5 3.5 Pd27-2-10 12.8 113 337 0.35 0.0508 2.5 0.3099 2.9 0.04425 1.4 279.1 3.8 Pd27-2-11 13.9 188 473 0.41 0.0495 2.5 0.2334 2.8 0.03417 1.3 216.6 2.9 Pd27-2-12 13.0 108 332 0.34 0.0526 3.5 0.330 3.8 0.04549 1.4 286.8 4.1 Pd27-2-13 16.6 158 444 0.37 0.0513 3.1 0.306 3.3 0.04331 1.4 273.3 3.7 辉长岩(P23-22) 1 5.60 100 146 0.71 0.0424 11 0.257 11 0.04397 1.6 277.4 4.4 2 9.78 154 258 0.62 0.0570 2.3 0.3483 2.8 0.04429 1.5 279.4 4.0 3 8.88 168 234 0.74 0.0512 4.6 0.311 4.8 0.04399 1.4 277.5 3.9 4 15.2 266 398 0.69 0.0512 3.6 0.315 3.9 0.04454 1.4 280.9 3.7 5 9.51 169 246 0.71 0.0487 6.6 0.300 6.7 0.04474 1.5 282.1 4.0 6 18.0 101 476 0.22 0.0516 2.3 0.3130 2.6 0.04401 1.3 277.7 3.6 7 8.20 117 213 0.56 0.0489 6.5 0.298 6.7 0.04427 1.5 279.2 4.1 8 13.0 236 344 0.71 0.0484 3.9 0.292 4.2 0.04382 1.4 276.4 3.7 9 7.94 150 210 0.74 0.0482 7.0 0.290 7.2 0.04365 1.5 275.4 4.1 10 11.4 219 303 0.75 0.0530 3.3 0.320 3.7 0.04377 1.7 276.2 4.6 11 9.86 174 262 0.68 0.0529 2.9 0.319 3.3 0.04376 1.5 276.1 4.0 12 8.67 158 233 0.70 0.0542 3.6 0.323 3.9 0.04325 1.5 273.0 3.9 13 10.2 164 274 0.62 0.0492 3.6 0.292 3.9 0.04305 1.4 271.7 3.7 
下载: 导出CSV
表 2 坡北岩体橄榄辉长岩(PB23-21)LA-ICP-MS锆石U-Th-Pb定年结果
Table 2. LA-ICP-MS U-Th-Pb isotopic dating results for the zircon from olivine gabbro (PB23-21) of the Pobei intrusion
测点编号 含量/10-6 Th/U 同位素比值 年龄/Ma 206Pb 232Th 238U 207Pb/206Pb 1σ/±% 207Pb/235U 1σ/±% 206Pb/238U 1σ/±% 206Pb/238U 1σ 橄榄辉长岩(PB23-21) 01 97 341.2 375.1 0.91 0.0524 0.11 0.3129 0.70 0.0434 0.07 273.6 4.6 02 172 614.1 611.0 1.01 0.0525 0.09 0.3112 0.64 0.0430 0.09 271.3 5.3 03 122 418.6 526.9 0.79 0.0522 0.09 0.3174 0.78 0.0441 0.09 278.1 5.3 04 179 642.0 616.8 1.04 0.0527 0.08 0.3122 0.67 0.0430 0.08 271.1 4.9 05 180 657.0 649.4 1.01 0.0521 0.08 0.3060 0.72 0.0426 0.09 269.0 5.6 06 101 355.5 405.3 0.88 0.0522 0.09 0.3117 0.64 0.0433 0.07 273.0 4.5 07 374 1351.5 1459.1 0.93 0.0519 0.08 0.3116 0.82 0.0435 0.10 274.5 6.3 08 158 542.2 663.9 0.82 0.0518 0.09 0.3153 0.75 0.0441 0.09 278.5 5.3 09 95 327.4 361.9 0.90 0.0523 0.11 0.3171 0.79 0.0440 0.09 277.4 5.5 10 62 212.0 284.0 0.75 0.0536 0.11 0.3206 0.71 0.0433 0.07 273.5 4.3 11 120 417.8 436.0 0.96 0.0522 0.09 0.3150 0.78 0.0437 0.09 276.0 5.4 12 157 540.0 550.0 0.98 0.0530 0.10 0.3227 0.76 0.0441 0.08 278.3 5.1 13 462 1646.2 1480.3 1.11 0.0521 0.07 0.3155 0.65 0.0439 0.08 276.8 4.7 14 2859 10438.6 10248.7 1.02 0.0523 0.06 0.3173 0.70 0.0439 0.09 277.2 5.4 15 132 456.9 531.5 0.86 0.0525 0.09 0.3186 0.66 0.0440 0.08 277.8 4.9 16 190 665.3 736.2 0.90 0.0520 0.08 0.3142 0.66 0.0438 0.08 276.2 4.8 17 205 688.5 1012.3 0.68 0.0521 0.09 0.3132 0.68 0.0436 0.08 275.0 4.7 18 89 305.3 357.9 0.85 0.0524 0.12 0.3162 0.80 0.0437 0.08 275.9 5.2 19 257 885.9 815.6 1.09 0.0530 0.10 0.3253 0.88 0.0445 0.09 280.4 5.7 20 91 314.4 410.5 0.77 0.0525 0.10 0.3129 0.71 0.0433 0.07 273.0 4.3 21 92 304.9 392.7 0.78 0.0531 0.09 0.3241 0.67 0.0443 0.06 279.3 3.8 22 517 1904.7 1350.5 1.41 0.0525 0.07 0.3105 0.62 0.0429 0.07 270.8 4.3 23 268 934.8 788.0 1.19 0.0525 0.08 0.3186 0.77 0.0440 0.09 277.5 5.5 24 117 400.3 553.0 0.72 0.0523 0.09 0.3114 0.70 0.0432 0.07 272.8 4.4 25 126 426.9 503.2 0.85 0.0523 0.11 0.3167 0.72 0.0439 0.08 277.1 4.9 26 82 283.5 296.3 0.96 0.0524 0.11 0.3120 0.80 0.0432 0.08 272.5 5.3 27 399 1408.5 1336.4 1.05 0.0519 0.08 0.3109 0.64 0.0435 0.07 274.3 4.3 28 91 312.0 354.2 0.88 0.0522 0.10 0.3143 0.65 0.0437 0.06 275.4 3.7 29 214 737.0 924.6 0.80 0.0518 0.07 0.3087 0.67 0.0432 0.08 272.6 5.1 30 252 905.6 736.2 1.23 0.0516 0.08 0.3111 0.56 0.0437 0.06 275.6 3.5 31 527 1889.3 1717.8 1.10 0.0518 0.07 0.3075 0.60 0.0431 0.07 271.8 4.6 32 91 320.9 368.7 0.87 0.0528 0.11 0.3149 0.74 0.0433 0.09 273.2 5.6 33 316 1126.2 1053.9 1.07 0.0514 0.08 0.3121 0.72 0.0441 0.09 277.9 5.3 34 121 428.1 407.1 1.05 0.0514 0.10 0.3120 0.76 0.0440 0.08 277.5 4.9 35 122 425.8 588.2 0.72 0.0518 0.09 0.3099 0.70 0.0434 0.09 273.7 5.6 36 282 965.3 755.0 1.28 0.0515 0.08 0.3142 0.76 0.0443 0.11 279.2 6.8 37 328 1202.9 985.7 1.22 0.0514 0.07 0.3073 0.67 0.0434 0.09 273.9 5.5 38 192 691.7 676.7 1.02 0.0515 0.07 0.3152 0.81 0.0444 0.10 280.2 6.3 39 633 2305.6 1676.2 1.36 0.0515 0.06 0.3140 0.73 0.0442 0.10 278.8 6.0 40 327 1163.0 1032.5 1.13 0.0521 0.08 0.3201 0.76 0.0446 0.10 281.2 6.0 41 196 720.6 550.8 1.31 0.0518 0.08 0.3140 0.76 0.0439 0.10 277.1 6.0 42 98 339.1 378.8 0.90 0.0524 0.09 0.3224 0.69 0.0446 0.09 281.4 5.7
下载: 导出CSV
表 3 坡北岩体各岩性岩石全岩主量、微量和稀土元素分析结果
Table 3. Whole-rock major, trace elements and REE data of the Pobei intrusion
元素 HPS-06 HPS-12 HPS-14 HPS-17 HPS-19 HPS-23 HPS-25 HPS-27 HPS-31 HPS-32 P23-21 P317-8 P317-17 IB-20 2016PB-6 A-21 A-28 A-13 A-29 A-43 A-45 A-65 M-76 M-95 A-56 A-74 A-75 A-80 A-17 A-23 A-30 A-63 单辉橄榄岩 橄榄辉长岩 橄榄辉长岩 橄榄辉长苏长岩 辉长苏长岩 辉长岩 SiO2 38.4 38.5 38.1 38 40.2 39.3 36.9 39.2 40.7 40.7 46.43 48.6 47.06 48.75 45.56 47.62 49.01 50.64 50.59 47.15 47.37 49.23 51.56 48.42 51.27 48.71 49.58 48.44 47.84 47.79 51.06 50.38 TiO2 0.15 0.17 0.1 0.15 0.19 0.25 0.13 0.27 0.26 0.45 0.16 0.27 0.4 0.25 0.36 0.16 0.2 0.28 0.38 0.13 0.13 0.28 0.37 0.23 0.22 0.26 0.27 0.25 0.16 0.19 0.31 0.27 Al2O3 5.47 5.06 4.33 4.94 5.5 6.34 2.19 5.26 7.14 6.66 19.13 21.78 17.12 17.87 16.45 20.61 20.82 17.48 15.43 22.9 22.26 19.62 20.15 18.01 20.94 17.92 18.46 19.18 20.83 19.08 19.84 20.76 Fe2O3 11.5 13 12.3 11.4 11.5 11.1 12.1 10.8 10.9 10.9 4.47 4.51 7.61 4.85 5.96 6.33 5.8 6.56 7.36 4.9 5.07 5.65 7.17 5.12 4.65 6.23 6.88 6.45 5.97 6.12 5.58 5.23 MnO 0.16 0.2 0.18 0.17 0.16 0.16 0.16 0.15 0.16 0.16 0.07 0.08 0.12 0.09 0.09 0.09 0.09 0.12 0.13 0.07 0.07 0.09 0.12 0.09 0.09 0.11 0.11 0.1 0.08 0.09 0.09 0.1 MgO 32.8 33.1 33.1 33.4 31.6 32.7 37 33.4 32.1 31.7 10.58 6.59 10.45 10.21 10.22 10.61 8.47 9.02 10.15 7.77 8.61 8.25 7.07 10.08 6.92 9.5 9.24 8.92 9.13 9.9 6.67 7.39 CaO 2.9 3.4 2.46 2.52 4.13 3.37 1.61 3.41 3.73 3.59 15.26 14.88 13.67 16.16 14.35 11.45 12.6 12.48 13.1 13 12.82 13.81 10.6 15.21 12.28 14.38 12.91 13.79 10.44 12.04 12.55 11.65 Na2O 0.36 0.39 0.27 0.43 0.57 0.69 0 0.55 0.81 0.84 1.19 1.88 1.54 1.69 4.72 2.17 2.11 2.34 2.19 1.93 1.95 2.13 2.92 1.72 2.5 1.68 2.11 1.83 2.61 1.94 2.75 2.33 K2O 0.14 0.06 0.17 0.24 0.15 0.14 0.08 0.1 0.18 0.22 0.05 0.08 0.1 0.05 0.15 0.07 0.1 0.12 0.1 0.08 0.07 0.11 0.14 0.06 0.12 0.05 0.09 0.08 0.18 0.18 0.15 0.2 P2O5 0.018 0.028 0.015 0.025 0.022 0.036 0.02 0.029 0.032 0.038 0.01 0.01 0.02 0.01 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.03 0.02 0.02 0.02 0.02 0.02 0.03 0.02 0.02 0.02 烧失量 6.83 5.02 7.83 7.55 5.18 5 8.6 5.35 2.97 4 2.03 0.41 0.64 0.63 0.46 0.79 0.72 0.92 0.27 1.61 1.27 0.74 0.57 1.75 1.09 0.68 0.37 0.92 2.69 2.57 1 1.61 总计 98.73 98.93 98.86 98.83 99.2 99.09 98.79 98.52 98.98 99.26 99.38 99.09 98.73 100.56 98.34 99.92 99.94 99.98 99.72 99.56 99.64 99.93 100.7 100.71 100.1 99.54 100.04 99.98 99.96 99.92 100.02 99.94 Sc 8 7.27 7.24 6.53 12.6 7.32 8.11 12 8.35 8.29 15.8 29.93 18.76 26.18 23.95 15.5 20.08 29.42 31.07 18.21 15.31 26.53 22.09 40.18 8 7.27 7.24 6.53 7.32 8.11 7.72 12 Cr 2.08 1.21 2.15 1.97 1.97 2 2.42 2.21 2.09 1.93 594.91 174.43 642.9 226.32 379.01 554.1 594.5 482.1 382.5 407.3 450.4 548.6 225.1 687.9 2.08 1.21 2.15 1.97 2 2.42 2.22 2.21 Co 115 125 127 109 116 111 130 116 111 109 45.63 28.31 41.3 45.82 50.51 52.58 38.33 36.58 43.05 34.82 38.54 36.91 58.38 65.58 115 125 127 109 111 130 117 116 Ni 788 684 1070 805 786 952 1000 1020 952 927 236.32 38.5 107.72 149.08 160.94 172.7 134.5 58.03 69.14 111.2 155.4 72.81 49.41 97.34 788 684 1070 805 952 1000 1060 1020 Cu 109 92 186 48 118 59 104 50 48 52 153.37 20.27 49.27 46.83 65.9 85.76 43.13 31.9 68.27 63.08 60.91 32.29 33.52 48.66 109 92 186 48 59 104 43 50 Rb 5.6 1.21 4.69 7.68 4.22 5.59 2.97 3.09 5.16 5.29 2.2 2.21 2.09 1.06 0.92 3.18 3.34 3.34 3.22 3.74 2.98 3.46 3.91 1.57 5.6 1.21 4.69 7.68 5.59 2.97 2.35 3.09 Sr 20 46 12 16.9 121 83.1 11.8 88.2 116 84.8 329.7 403.77 248.74 347.17 342.92 227.5 261.2 238.5 208.9 338.7 295.9 265 497.9 406.4 317.7 268.4 305.1 326 337.5 218.9 316.6 306.9 Y 2.14 3.91 1.73 3.19 3.88 4.05 2.83 4.15 4.06 5.76 4.25 6.33 7.04 6.72 7.73 2.59 3.53 5.91 7.51 2.26 2.35 5.09 7.02 7.96 3.57 4.62 3.87 3.54 2.64 3.63 4.5 3.8 Zr 7.21 15.2 4.61 11.7 10.1 21.9 9.46 18.9 17.1 27.8 4.97 9.28 11.18 6.68 10.71 4.73 6.22 7.66 10.76 4.03 5.52 8.36 11.22 10.18 5.76 5.52 7.2 7.38 5.38 5.78 6.25 7.16 Nb 0.09 0.16 0.13 0.2 0.17 0.47 0.15 0.36 0.27 0.48 0.11 0.28 0.24 0.1 0.1 0.09 0.17 0.14 0.15 0.1 0.14 0.19 0.47 0.13 0.13 0.06 0.14 0.16 0.12 0.12 0.15 0.25 Ba 2.32 1.61 2.55 1.82 18 10.6 3.47 8.74 19 9.85 13.57 28.68 30.09 15.35 11.37 15.02 23.48 31.19 18.19 20.55 17.35 26.2 72.58 25.64 23.8 16.54 25.73 27.81 27.21 15.69 35.51 33.05 La 0.19 0.38 0.22 0.32 0.45 0.98 0.38 0.74 0.76 1.09 0.84 1.55 1.67 1.05 0.94 0.66 0.95 0.99 0.9 0.91 0.84 1.14 2.28 1.08 0.89 0.62 0.78 0.81 0.94 0.78 0.89 1.24 Ce 0.53 1.23 0.55 1.02 1.22 2.58 1.11 2.18 2.19 3.16 2.05 3.8 4.03 2.74 2.82 1.63 2.25 2.22 2.51 1.73 1.93 2.74 5.02 3.07 2.1 1.73 2.02 2.15 2.14 1.88 2.22 2.83 Pr 0.1 0.21 0.08 0.17 0.2 0.39 0.17 0.35 0.36 0.5 0.31 0.55 0.62 0.46 0.5 0.23 0.31 0.39 0.42 0.28 0.27 0.4 0.67 0.5 0.3 0.28 0.3 0.32 0.29 0.28 0.33 0.38 Nd 0.58 1.19 0.47 0.99 1.11 1.78 1.01 1.75 1.76 2.71 1.66 2.89 3.47 2.48 2.93 1.28 1.61 2.14 2.4 1.32 1.33 2.14 3.43 3.01 1.51 1.66 1.77 1.73 1.46 1.51 1.73 1.78 Sm 0.22 0.45 0.19 0.36 0.42 0.52 0.36 0.46 0.53 0.82 0.59 0.87 1.14 0.91 1.06 0.4 0.48 0.73 0.91 0.33 0.36 0.69 0.92 1.07 0.5 0.6 0.61 0.58 0.4 0.54 0.62 0.48 Eu 0.12 0.16 0.11 0.14 0.18 0.25 0.12 0.2 0.27 0.37 0.43 0.63 0.63 0.54 0.64 0.39 0.43 0.54 0.53 0.4 0.4 0.52 0.73 0.67 0.54 0.43 0.45 0.41 0.45 0.41 0.54 0.5 Gd 0.23 0.48 0.23 0.37 0.55 0.59 0.41 0.63 0.54 0.97 0.78 1.21 1.54 1.24 1.41 0.56 0.69 1.09 1.34 0.5 0.54 0.98 1.37 1.49 0.71 0.88 0.84 0.77 0.59 0.71 0.87 0.66 Tb 0.05 0.11 0.04 0.09 0.11 0.11 0.09 0.12 0.11 0.18 0.14 0.2 0.24 0.22 0.27 0.09 0.11 0.19 0.22 0.08 0.08 0.16 0.2 0.24 0.11 0.15 0.14 0.13 0.09 0.13 0.14 0.11 Dy 0.36 0.65 0.3 0.47 0.71 0.66 0.5 0.76 0.68 1.06 0.88 1.23 1.75 1.44 1.64 0.52 0.72 1.2 1.5 0.46 0.48 1 1.51 1.76 0.71 0.99 0.88 0.79 0.55 0.77 0.88 0.71 Ho 0.07 0.15 0.07 0.11 0.16 0.14 0.11 0.17 0.16 0.23 0.18 0.25 0.32 0.29 0.32 0.12 0.15 0.25 0.31 0.09 0.1 0.2 0.29 0.33 0.15 0.2 0.18 0.16 0.11 0.16 0.18 0.14 Er 0.22 0.37 0.17 0.35 0.4 0.4 0.34 0.44 0.44 0.65 0.47 0.72 0.88 0.78 0.92 0.33 0.38 0.72 0.87 0.27 0.28 0.58 0.92 0.93 0.39 0.52 0.47 0.44 0.32 0.43 0.5 0.44 Tm 0.03 0.05 0.03 0.04 0.07 0.06 0.05 0.06 0.06 0.09 0.06 0.09 0.14 0.1 0.12 0.05 0.06 0.09 0.13 0.03 0.04 0.08 0.13 0.13 0.06 0.07 0.07 0.06 0.05 0.06 0.07 0.06 Yb 0.22 0.4 0.18 0.3 0.41 0.39 0.28 0.41 0.41 0.58 0.41 0.67 0.71 0.68 0.74 0.28 0.36 0.6 0.71 0.18 0.23 0.45 0.8 0.73 0.38 0.47 0.4 0.33 0.29 0.37 0.4 0.44 Lu 0.04 0.06 0.02 0.04 0.06 0.07 0.05 0.07 0.06 0.1 0.06 0.09 0.11 0.09 0.1 0.04 0.06 0.09 0.12 0.03 0.04 0.07 0.12 0.11 0.06 0.07 0.06 0.06 0.05 0.06 0.06 0.06 Hf 0.2 0.37 0.13 0.28 0.3 0.5 0.27 0.45 0.45 0.71 0.2 0.3 0.42 0.29 0.45 0.15 0.22 0.26 0.4 0.12 0.16 0.29 0.34 0.41 0.19 0.22 0.24 0.26 0.18 0.22 0.23 0.22 Ta 0.01 0.02 0.01 0.03 0.02 0.04 0.02 0.03 0.01 0.04 0.03 0.04 0.03 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.01 0.01 0.01 0.01 0.02 0.02 0.03 0.02 0.02 0.02 Th 0.02 0.05 0.03 0.08 0.07 0.21 0.06 0.11 0.05 0.13 0.08 0.17 0.13 0.07 0.04 0.05 0.1 0.16 0.1 0.12 0.08 0.11 0.8 0.81 0.06 0.02 0.04 0.04 0.09 0.05 0.06 0.13 U 0.03 0.01 0.03 0.18 0.04 0.06 0.02 0.03 0.01 0.04 0.03 0.07 0.08 0.13 0.03 0.02 0.05 0.19 0.37 0.21 0.04 0.04 1.29 1.4 0.06 0.03 0.13 0.11 0.06 0.13 0.07 0.08 Pb 2 0.42 1.13 2.56 1.09 1.24 1.02 0.7 0.81 0.85 1.37 1.12 1.1 0.6 0.52 1 1.18 1.07 0.86 1.04 0.86 0.83 2.34 1.46 0.96 0.8 0.82 1.4 1.26 1.35 1.08 1.51 来源 [6] 本文 [14] [15] 注：主量元素含量单位为%，微量和稀土元素含量单位为10-6
下载: 导出CSV
-
[1] 焦建刚, 芮会超, 夏明哲, 等.基性-超基性侵入岩中-大比例尺专题地质填图实践——以塔里木板块东北部坡北岩体为例[J].地质通报, 2017, 36(11):1999-2011. http://dzhtb.cgs.cn/gbc/ch/reader/view_abstract.aspx?file_no=20171110&flag=1
[2] 姜常义, 程松林, 叶书锋, 等.新疆北山地区中坡山北镁铁质岩体岩石地球化学与岩石成因[J].岩石学报, 2006, 22(1):115-126. http://www.cnki.com.cn/Article/CJFDTotal-YSXB200601012.htm
[3] 姜常义, 郭娜欣, 夏明哲, 等.塔里木板块东北部坡一镁铁质-超镁铁质层状侵入体岩石成因[J].岩石学报, 2012, 28(7):2209-2223. http://d.wanfangdata.com.cn/Periodical/ysxb98201207021
[4] 李华芹, 陈富文, 梅玉萍, 等.新疆坡北基性-超基性岩带Ⅰ号岩体Sm-Nd和SHRI MP U-Pb同位素年龄及其地质意义[J].矿床地质, 2006, 25(4):463-469. http://www.cqvip.com/Main/Detail.aspx?id=23640427
[5] 李华芹, 梅玉萍, 屈文俊, 等.新疆坡北基性-超基性岩带10号岩体SHRIMP U-Pb和矿石Re-Os同位素定年及其意义[J].矿床地质, 2009, 28(5):633-642. http://d.wanfangdata.com.cn/Periodical/kcdz200905009
[6] 颉炜, 宋谢炎, 聂晓勇, 等.新疆坡十铜镍硫化物含矿岩体岩浆源区特征及构造背景探讨[J].地学前缘, 2011, 18(3):189-200. http://d.wanfangdata.com.cn/Periodical/dxqy201103016
[7] 苏本勋, 秦克章, 唐冬梅, 等.新疆北山地区坡十镁铁-超镁铁岩体的岩石学特征及其对成矿作用的指示[J].岩石学报, 2011, 27(12):3627-3639. http://www.cnki.com.cn/Article/CJFDTotal-YSXB201112011.htm
[8] 孙燕, 肖渊甫, 王道永, 等.新疆北山坡北基性超基性杂岩特征及成矿远景[J].成都理工大学学报(自然科学版), 2009, 36(4):402-408. http://www.cnki.com.cn/Article/CJFDTotal-CDLG200904008.htm
[9] 王梦玺, 陈炳龙, 焦建刚.塔里木板块东北缘坡北杂岩体矿物成分和铂族元素特征:对硫化物熔离和构造环境的约束[J].岩石学报, 2018, 34(8):2223-2244. http://kns.cnki.net/KCMS/detail/detail.aspx?dbcode=CJFD&filename=YSXB201808003
[10] 宋彪, 张玉海, 万渝生, 等.锆石SHRIMP样品靶制作、年龄测定及有关现象讨论[J].地质论评, 2002, 48(S1):26-30. http://www.cnki.com.cn/Article/CJFDTotal-DZLP2002S1006.htm
[11] 王岚, 杨理勤, 王亚平, 等.锆石LA-ICP-MS原位微区U-Pb定年及微量元素的同时测定[J].地球学报, 2012, 33(5):763-772. http://d.wanfangdata.com.cn/Periodical/dqxb201205011
[12] McDonough W W, Sun S S.The composition of the Earth[J].Chem.Geol., 1995, 120:223-253. http://www.sciencedirect.com/science/article/pii/0009254194001404
[13] Sun S S, Mc Donough W W.Chemical and isotopic systematics of oceanic basalt:implicationsformantle composition ans processes[J].Geological Society of London, 1989, 42:313-345. http://petrology.oxfordjournals.org/cgi/ijlink?linkType=ABST&journalCode=specpubgsl&resid=42/1/313
[14] 焦建刚, 冷馨, 段少帅, 等.塔里木东北缘早二叠世坡东铜镍硫化物矿床成矿特征与岩石成因[J].岩石学报, 2018, 34(8):2211-2222. http://www.cnki.com.cn/Article/CJFDTotal-YSXB201808002.htm
[15] 郭娜欣.塔里木板块东北部坡北岩体内镁铁质层状岩系岩石成因[D].长安大学硕士学位论文, 2012: 1-93.
[16] 焦建刚, 高栋, 张国鹏, 等.甘肃永昌北海子镁铁-超镁铁质岩体岩石学、地球化学及年代学研究[J].地学前缘, 2017, 24(2):130-139. http://www.cnki.com.cn/Article/CJFDTOTAL-DXQY201702019.htm
[17] Arculus R J, Johnson R W.Island magma sources:A geochemical assessment of the roles of slab-derived components and crusal contamination[J].Geochemical Journal, 1981, 15:109-133. http://ci.nii.ac.jp/naid/80000941593
[18] Hunter A G.Intracrustal controls on the coexistence of tholeiitic and calc-alkaline magma series at Aso Volcano, SW Japan[J].Journal of Petrology, 1998, 39(7):1266-1284.
[19] Rudick R, Gao S.The role of lower crustal recycling in continent formation[J].Geochim.Cosmochim.Acta, 2003, 67(18):403-403.
[20] Xue S C, Li C S, Qin K Z, et al.A non-plume model for the Permian protracted (266~286Ma) basaltic magmatism in the Beishan-Tianshan region, Xinjiang, western China[J].Lithos, 2016, 256/257:243-249. http://dx.doi.org/10.1016/j.lithos.2016.04.018
[21] Yang S H, Zhou M F, Lightfoot P C, et al.Re-Os isotope and platinum-group element geochemistry of the Pobei Ni-Cu sulfide-bearing mafic-ultramafic complex in the northeastern part of the Tarim Craton[J].Mineralium Deposita, 2014, 49(3):381-397. http://link.springer.com/article/10.1007/s00126-013-0496-x
[22] Zindler A, Hart S R.Chemical geodynamics[J].Annual Rev.Earth Planet.Sci., 1986, 14:493-571. http://arjournals.annualreviews.org/doi/abs/10.1146/annurev.ea.14.050186.002425
-
图(6)
表(3)
计量
- 文章访问数: 411
- PDF下载数: 4
- 施引文献: 0