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北山造山带南缘潘家井子二叠纪弧岩浆岩的识别及构造意义

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查显锋, 黄博涛, 罗克勇, 孙吉明, 关冲, 王欣. 2024. 北山造山带南缘潘家井子二叠纪弧岩浆岩的识别及构造意义. 西北地质, 57(6): 58-77. doi: 10.12401/j.nwg.2024091
引用本文: 查显锋, 黄博涛, 罗克勇, 孙吉明, 关冲, 王欣. 2024. 北山造山带南缘潘家井子二叠纪弧岩浆岩的识别及构造意义. 西北地质, 57(6): 58-77. doi: 10.12401/j.nwg.2024091
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ZHA Xianfeng, HUANG Botao, LUO Keyong, SUN Jiming, GUAN Chong, WANG Xin. 2024. Identification of the Permian Arc-Related Magmatic Rocks and Its Significance in Panjiajingzi Area, Southern Margin of Beishan Orogenic Belt. Northwestern Geology, 57(6): 58-77. doi: 10.12401/j.nwg.2024091
Citation: ZHA Xianfeng, HUANG Botao, LUO Keyong, SUN Jiming, GUAN Chong, WANG Xin. 2024. Identification of the Permian Arc-Related Magmatic Rocks and Its Significance in Panjiajingzi Area, Southern Margin of Beishan Orogenic Belt. Northwestern Geology, 57(6): 58-77. doi: 10.12401/j.nwg.2024091
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北山造山带南缘潘家井子二叠纪弧岩浆岩的识别及构造意义

  • 中国地质调查局西安地质调查中心，造山带地质研究中心，陕西 西安　710119

  • 基金项目: 中国地质调查局项目“东天山–北山成矿带区域地质调查”（DD20240029），“东天山–北山造山带区域地质调查”（DD20221636-1）和陕西省自然科学基金项目（2023-JC-YB-249）联合资助。
详细信息
    作者简介: 查显锋（1984−），博士，高级工程师，主要从事构造地质和区域地质调查工作。E−mail：zha_xianfeng@126.com

  • 中图分类号: P581

Identification of the Permian Arc-Related Magmatic Rocks and Its Significance in Panjiajingzi Area, Southern Margin of Beishan Orogenic Belt

  • Xi’an Center of China Geological Survey, Center for Orogenic Belt Geology of China Geological Survey, Xi’an 710119, Shaanxi, China

    摘要

  • 北山造山带位于中亚造山带南缘，对该带内原先划定的“前寒武系”的准确厘定或解体对理解造山带属性和构造演化过程认识具有重要意义。笔者对瓜州潘家井子一带原划定的敦煌岩群开展区域地质调查，表明其为变粒岩、浅粒岩、变质砾岩及少量斜长角闪岩和黑云石英片岩等组成的一套具有强变形、低级变质的变火山–碎屑岩。获得灰白色变粒岩、云母石英片岩和浅粒岩的锆石U-Pb年龄为294～285 Ma，同时还获得变质砾岩中花岗质砾石中锆石的最小U-Pb年龄为（272±6）Ma，未发现古老年代学信息，表明该套变质火山–碎屑岩形成时代不早于中二叠世。变质基性火山岩具有拉斑玄武岩地球化学特征，呈略微右倾的稀土元素配分模式，显示出高TiO2、Na2O含量，明显的Nb-Ta亏损特征，类似于弧玄武岩特征。结合本次研究成果和区域地质特征认为，潘家井子一带原划定的“敦煌岩群”应厘定为二叠纪变火山碎屑岩，形成于早—中二叠世俯冲作用相关的局部伸展构造环境。

    The Beishan Orogenic Belt, located at the southern margin of the Central Asian Orogenic Belt, is important for understanding the tectonic affinity and evolutionary history, in terms of the accurate determination or disintegration of the namely Precambrian basement rocks. The originally defined Dunhuang Group in Panjiajingzi area is composed mainly of leptynite, leptite, meta-conglomerate, minor amphibolite, and mica quartz schist, and is characterized by strong deformation and low-grade metamorphosed pyroclastic rocks, based on regional geological investigation. Zircon U-Pb ages of 294~285 Ma for leptynite, mica quartz schist, and leptite samples, as well as the minimum age of (272±6) Ma for gravel sample from meta-conglomerate have been obtained with no ancient geochronological information. All these dating data indicate that these mata pyroclastic rocks were deposited later than Middle Permian. In addition, the meta basic volcanic samples have high TiO2 and Na2O contents with obvious Nb-Ta trough, and display right-sloping chondrite-nomalized REE patterns, resembling that of the arc basalts. Combining our data and regional geology, it is reasonable to believe that these meta pyroclastic rocks were formed in a local extension setting during the subduction process during Early to Middle Permian, and thus these rocks should be disintegrated from the Dunhuang Group.

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  • 图 1  北山造山带大地构造位置（a） （Şengör et al., 1993） 及区域构造单元划分（b） （据He et al., 2018; Huang et al.，2022修改）

    Figure 1. 

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    图 2  北山造山带南缘潘家井子一带地质图

    Figure 2. 

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    图 3  潘家井子一带灰白色变粒岩（a、b）、云母石英片岩（c、d）和灰白色浅粒岩（e、f）的野外露头及显微特征

    Figure 3. 

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    图 4  潘家井子一带变质火山–碎屑岩变形特征

    Figure 4. 

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    图 5  北山造山带南缘潘家井子一带灰白色变粒岩（a）、云母石英片岩（b）、变火山碎屑岩（c）和花岗质砾石（d）的锆石阴极发光照片

    Figure 5. 

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    图 6  北山造山带南缘潘家井子一带灰白色变粒岩（a）、云母石英片岩（b）、变火山碎屑岩（c）和花岗质砾石（d）的锆石U-Pb年龄谐和图和加权平均年龄（或频率分布图）

    Figure 6. 

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    图 7  北山造山带南缘潘家井子一带斜长角闪岩和白色变粒岩岩石分类图解

    Figure 7. 

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    图 8  北山造山带南缘潘家井子一带斜长角闪岩和白色变粒岩球粒陨石标准化稀土元素配分图（a）和原始地幔标准化微量元素蛛网图（b）

    Figure 8. 

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    图 9  北山造山带南缘潘家井子一带斜长角闪岩的构造环境判别图

    Figure 9. 

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    表 1  灰白色变粒岩锆石U-Pb年龄数据表

    Table 1.  Zircon U-Pb age of grayish-white granulite

    测试点
    		 同位素比值 U-Pb年龄（Ma） 含量（10−6） Th/U
    207Pb/206Pb 207Pb/235U 206Pb/238U 208Pb/232Th 207Pb/206Pb 207Pb/235U 206Pb/238U 208Pb/232Th Th U
    P1-7,01 0.05511 0.00349 0.34026 0.02114 0.04480 0.00108 0.01566 0.00058 416 136 297 16 283 7 314 11 2179 3674 0.59
    P1-7,02 0.05338 0.00355 0.33860 0.02208 0.04602 0.00112 0.01413 0.00065 345 143 296 17 290 7 284 13 1621 4160 0.39
    P1-7,03 0.05229 0.00409 0.33106 0.02540 0.04593 0.00120 0.01179 0.00066 298 169 290 19 290 7 237 13 1999 4023 0.50
    P1-7,04 0.05177 0.00436 0.33908 0.02800 0.04752 0.00126 0.01534 0.00071 275 182 297 21 299 8 308 14 2218 3536 0.63
    P1-7,05 0.05072 0.00371 0.32011 0.02303 0.04578 0.00113 0.01640 0.00062 228 161 282 18 289 7 329 12 2543 3869 0.66
    P1-7,06 0.05118 0.00320 0.32132 0.01972 0.04554 0.00108 0.01698 0.00058 249 138 283 15 287 7 340 11 2779 3980 0.70
    P1-7,08 0.05140 0.00296 0.31814 0.01803 0.04490 0.00104 0.01401 0.00049 259 127 281 14 283 6 281 10 2769 4442 0.62
    P1-7,09 0.05153 0.00331 0.31617 0.01993 0.04451 0.00107 0.01520 0.00064 265 141 279 15 281 7 305 13 1476 3523 0.42
    P1-7,10 0.05258 0.00297 0.32363 0.01797 0.04465 0.00103 0.01491 0.00053 311 123 285 14 282 6 299 10 2240 4164 0.54
    P1-7,11 0.05011 0.00411 0.31494 0.02537 0.04559 0.00117 0.01483 0.00064 200 180 278 20 287 7 298 13 1279 2201 0.58
    P1-7,12 0.05159 0.00189 0.32440 0.01174 0.04561 0.00096 0.01504 0.00038 267 82 285 9 288 6 302 7 12006 12518 0.96
    P1-7,13 0.05142 0.00231 0.32398 0.01433 0.04570 0.00100 0.01518 0.00047 260 100 285 11 288 6 305 9 3722 7290 0.51
    P1-7,14 0.05159 0.00239 0.32600 0.01483 0.04584 0.00101 0.01598 0.00051 267 103 287 11 289 6 320 10 2926 6472 0.45
    P1-7,15 0.05087 0.00261 0.31563 0.01594 0.04501 0.00101 0.01451 0.00050 235 114 279 12 284 6 291 10 2906 5935 0.49
    P1-7,16 0.05032 0.00403 0.31594 0.02485 0.04554 0.00118 0.01393 0.00084 210 176 279 19 287 7 280 17 740 2463 0.30
    P1-7,17 0.05153 0.00253 0.32393 0.01561 0.04560 0.00102 0.01537 0.00047 265 109 285 12 287 6 308 9 4122 5959 0.69
    P1-7,18 0.04747 0.00744 0.30427 0.04686 0.04650 0.00168 0.01513 0.00131 72 336 270 36 293 10 304 26 268 629 0.43
    P1-7,19 0.05224 0.00336 0.32335 0.02037 0.04489 0.00108 0.01418 0.00050 296 140 285 16 283 7 285 10 3717 4518 0.82
    P1-7,20 0.05202 0.00338 0.32851 0.02093 0.04581 0.00110 0.01536 0.00060 286 142 288 16 289 7 308 12 2284 4142 0.55
    P1-7,21 0.05650 0.00577 0.35412 0.03537 0.04546 0.00137 0.01717 0.00104 471 212 308 27 287 8 344 21 659 1447 0.46
    P1-7,22 0.05155 0.00350 0.31198 0.02077 0.04389 0.00107 0.01473 0.00051 266 149 276 16 277 7 296 10 3213 3576 0.90
    P1-7,24 0.05755 0.00303 0.36486 0.01884 0.04598 0.00105 0.01793 0.00056 512 112 316 14 290 6 359 11 3553 5181 0.69
    P1-7,25 0.05427 0.00275 0.33646 0.01674 0.04496 0.00101 0.01714 0.00051 382 110 295 13 284 6 344 10 4855 6345 0.77
    P1-7,26 0.05034 0.00392 0.31461 0.02403 0.04532 0.00117 0.01586 0.00078 211 171 278 19 286 7 318 16 1373 2780 0.49
    P1-7,27 0.05343 0.00232 0.33426 0.01426 0.04537 0.00098 0.01623 0.00045 347 95 293 11 286 6 325 9 7294 8820 0.83
    P1-7,28 0.05012 0.00265 0.31793 0.01654 0.04600 0.00104 0.01663 0.00050 201 119 280 13 290 6 333 10 5452 6678 0.82
    P1-7,29 0.05283 0.00318 0.33541 0.01977 0.04604 0.00108 0.01669 0.00063 322 131 294 15 290 7 335 13 2661 5312 0.50
    P1-7,30 0.05180 0.00248 0.31805 0.01497 0.04453 0.00098 0.01578 0.00049 276 106 280 12 281 6 316 10 4687 8088 0.58
    P1-7,32 0.05851 0.00463 0.37709 0.02918 0.04673 0.00124 0.01523 0.00078 549 164 325 22 294 8 306 16 1146 2326 0.49
    P1-7,33 0.05406 0.00986 0.34064 0.06106 0.04569 0.00184 0.01507 0.00117 373 366 298 46 288 11 302 23 493 518 0.95
    P1-7,34 0.05322 0.00213 0.32288 0.01269 0.04399 0.00094 0.01585 0.00042 338 88 284 10 278 6 318 8 11053 12373 0.89
    P1-7,36 0.05147 0.00235 0.31350 0.01408 0.04416 0.00096 0.01492 0.00045 262 102 277 11 279 6 299 9 5778 8519 0.68
    P1-7,37 0.05078 0.00227 0.31596 0.01388 0.04511 0.00098 0.01866 0.00058 231 100 279 11 284 6 374 12 3494 8375 0.42
    P1-7,38 0.05194 0.00244 0.32075 0.01480 0.04477 0.00098 0.01452 0.00041 283 104 283 11 282 6 291 8 7864 7327 1.07
    P1-7,39 0.05203 0.00250 0.32083 0.01511 0.04470 0.00098 0.01578 0.00043 287 106 283 12 282 6 317 9 8145 6810 1.20
    P1-7,40 0.05169 0.00236 0.31645 0.01415 0.04438 0.00096 0.01482 0.00043 272 101 279 11 280 6 297 9 7014 9028 0.78
    P1-7,41 0.06391 0.00294 0.40709 0.01829 0.04618 0.00102 0.01844 0.00061 739 94 347 13 291 6 369 12 3459 7079 0.49
    P1-7,42 0.05210 0.00332 0.32088 0.02003 0.04465 0.00106 0.01562 0.00059 290 139 283 15 282 7 313 12 2509 4130 0.61
    P1-7,43 0.05660 0.00293 0.35966 0.01822 0.04606 0.00104 0.01522 0.00042 475 111 312 14 290 6 305 8 9165 5464 1.68
    P1-7,44 0.05156 0.00307 0.32164 0.01874 0.04522 0.00105 0.01805 0.00065 266 131 283 14 285 6 362 13 2241 4229 0.53
    P1-7,45 0.05355 0.00305 0.33214 0.01853 0.04495 0.00104 0.01631 0.00064 352 123 291 14 284 6 327 13 2311 5079 0.45
    P1-7,46 0.05391 0.00272 0.34290 0.01692 0.04610 0.00103 0.01674 0.00053 367 109 299 13 291 6 336 11 3909 5859 0.67
    P1-7,47 0.05171 0.00253 0.32288 0.01550 0.04525 0.00100 0.01601 0.00044 273 108 284 12 285 6 321 9 8784 6577 1.34
    P1-7,48 0.04928 0.00322 0.30789 0.01973 0.04528 0.00107 0.01600 0.00058 161 146 273 15 286 7 321 11 2651 3793 0.70
    P1-7,49 0.05077 0.00292 0.31240 0.01759 0.04459 0.00102 0.01522 0.00051 230 127 276 14 281 6 305 10 3595 4836 0.74
    P1-7,50 0.05290 0.00617 0.32823 0.03749 0.04497 0.00142 0.01564 0.00087 324 245 288 29 284 9 314 17 997 1325 0.75
    P1-7,51 0.05239 0.00522 0.31956 0.03115 0.04420 0.00128 0.01332 0.00051 302 212 282 24 279 8 268 10 2811 1552 1.81
    P1-7,52 0.05100 0.00337 0.31367 0.02027 0.04456 0.00107 0.01391 0.00065 241 145 277 16 281 7 279 13 1376 3467 0.40
    P1-7,53 0.05037 0.00328 0.31083 0.01984 0.04471 0.00106 0.01538 0.00056 212 144 275 15 282 7 308 11 3160 4148 0.76
    P1-7,54 0.05274 0.00302 0.32534 0.01821 0.04469 0.00103 0.01612 0.00063 318 125 286 14 282 6 323 13 2122 4849 0.44
    P1-7,56 0.05199 0.00289 0.31811 0.01730 0.04433 0.00101 0.01541 0.00051 285 122 280 13 280 6 309 10 3693 4946 0.75
    P1-7,57 0.05023 0.00296 0.31358 0.01811 0.04523 0.00104 0.01504 0.00054 205 131 277 14 285 6 302 11 2923 4358 0.67
    P1-7,58 0.05337 0.00230 0.32096 0.01353 0.04357 0.00093 0.01602 0.00044 345 94 283 10 275 6 321 9 8734 8736 1.00
    P1-7,59 0.05649 0.00280 0.35957 0.01739 0.04611 0.00102 0.01666 0.00049 471 107 312 13 291 6 334 10 6026 5992 1.01
    P1-7,60 0.05168 0.00199 0.33001 0.01243 0.04626 0.00097 0.01706 0.00046 271 86 290 9 292 6 342 9 10769 13004 0.83
    下载: 导出CSV

    表 2  云母石英片岩锆石U-Pb年龄数据表

    Table 2.  Zircon U-Pb ages of mica quartz schist

    测试点
    		 同位素比值 U-Pb年龄（Ma） 含量（10−6） Th/U
    207Pb/206Pb 207Pb/235U 206Pb/238U 208Pb/232Th 207Pb/206Pb 207Pb/235U 206Pb/238U 208Pb/232Th Th U
    P1-21,03 0.05796 0.00528 0.35597 0.03183 0.04453 0.00127 0.01159 0.00055 528 188 309 24 281 8 233 11 1557 1861 0.84
    P1-21,04 0.05133 0.00357 0.31829 0.02185 0.04496 0.00113 0.01184 0.00049 256 153 281 17 284 7 238 10 1528 2726 0.56
    P1-21,05 0.05728 0.00476 0.36535 0.02979 0.04625 0.00127 0.01325 0.00060 502 174 316 22 291 8 266 12 1352 1925 0.70
    P1-21,06 0.05218 0.00505 0.32843 0.03130 0.04564 0.00128 0.01351 0.00064 293 207 288 24 288 8 271 13 1152 1699 0.68
    P1-21,08 0.05353 0.00377 0.33787 0.02344 0.04577 0.00115 0.01295 0.00051 351 151 296 18 289 7 260 10 2592 3689 0.70
    P1-21,10 0.04943 0.00356 0.32441 0.02306 0.04760 0.00119 0.01422 0.00052 168 160 285 18 300 7 285 10 2313 3170 0.73
    P1-21,11 0.05866 0.00399 0.38201 0.02557 0.04723 0.00119 0.01464 0.00058 554 142 329 19 298 7 294 12 1923 3238 0.59
    P1-21,12 0.05444 0.00487 0.35054 0.03082 0.04670 0.00130 0.01336 0.00071 389 189 305 23 294 8 268 14 1054 1879 0.56
    P1-21,14 0.05380 0.00360 0.33035 0.02179 0.04454 0.00110 0.01300 0.00051 362 144 290 17 281 7 261 10 2487 4269 0.58
    P1-21,15 0.04916 0.00461 0.31076 0.02869 0.04585 0.00127 0.01460 0.00071 156 206 275 22 289 8 293 14 1152 2075 0.56
    P1-21,16 0.05221 0.00433 0.32084 0.02616 0.04457 0.00120 0.01252 0.00060 295 178 283 20 281 7 252 12 1493 2671 0.56
    P1-21,17 0.05258 0.00308 0.33040 0.01911 0.04558 0.00108 0.01284 0.00044 311 128 290 15 287 7 258 9 3524 4948 0.71
    P1-21,18 0.05405 0.00379 0.34550 0.02389 0.04636 0.00116 0.01341 0.00052 373 151 301 18 292 7 269 10 2168 3352 0.65
    P1-21,20 0.05095 0.00790 0.31830 0.04851 0.04531 0.00168 0.01480 0.00115 239 323 281 37 286 10 297 23 443 860 0.52
    P1-21,21 0.05447 0.00259 0.34030 0.01604 0.04532 0.00102 0.01432 0.00042 391 103 297 12 286 6 288 8 5966 9491 0.63
    P1-21,22 0.05632 0.00441 0.36122 0.02778 0.04653 0.00124 0.01442 0.00065 464 166 313 21 293 8 289 13 1701 2957 0.58
    P1-21,23 0.05082 0.00380 0.31441 0.02313 0.04488 0.00115 0.01462 0.00055 232 164 278 18 283 7 293 11 2390 3204 0.75
    P1-21,24 0.05572 0.00742 0.33900 0.04425 0.04413 0.00154 0.01492 0.00092 441 272 296 34 278 10 299 18 820 1146 0.72
    P1-21,25 0.05178 0.00434 0.31713 0.02611 0.04443 0.00119 0.01348 0.00063 276 181 280 20 280 7 271 12 1845 3185 0.58
    P1-21,26 0.05270 0.00461 0.33574 0.02883 0.04621 0.00127 0.01379 0.00065 316 187 294 22 291 8 277 13 1758 2461 0.71
    P1-21,27 0.05849 0.00627 0.36278 0.03814 0.04500 0.00139 0.01242 0.00073 548 219 314 28 284 9 249 15 1193 1822 0.66
    P1-21,28 0.05641 0.00412 0.35908 0.02577 0.04618 0.00118 0.01399 0.00055 468 155 312 19 291 7 281 11 2209 3089 0.72
    P1-21,29 0.05564 0.00493 0.35002 0.03044 0.04564 0.00128 0.01158 0.00061 438 186 305 23 288 8 233 12 1315 1958 0.67
    P1-21,30 0.05242 0.00409 0.32669 0.02505 0.04521 0.00117 0.01494 0.00065 304 168 287 19 285 7 300 13 1999 3687 0.54
    P1-21,32 0.05399 0.00547 0.33688 0.03348 0.04527 0.00133 0.01579 0.00080 370 213 295 25 285 8 317 16 1404 2115 0.66
    P1-21,33 0.05917 0.00481 0.36627 0.02925 0.04491 0.00120 0.01358 0.00059 573 168 317 22 283 7 273 12 1937 2852 0.68
    P1-21,35 0.04629 0.00540 0.28849 0.03306 0.04521 0.00139 0.01106 0.00101 13 259 257 26 285 9 222 20 785 2075 0.38
    P1-21,36 0.05480 0.00480 0.33728 0.02903 0.04465 0.00122 0.01319 0.00062 404 185 295 22 282 8 265 12 1904 2903 0.66
    P1-21,37 0.05584 0.00609 0.34812 0.03725 0.04523 0.00138 0.01562 0.00082 446 226 303 28 285 9 313 16 1304 1982 0.66
    P1-21,38 0.04965 0.00428 0.31379 0.02662 0.04585 0.00122 0.01543 0.00072 179 189 277 21 289 8 310 14 1594 3065 0.52
    P1-21,39 0.05838 0.00577 0.37144 0.03598 0.04616 0.00136 0.01563 0.00083 544 203 321 27 291 8 314 16 1225 2068 0.59
    P1-21,40 0.05393 0.00462 0.32533 0.02739 0.04377 0.00118 0.01258 0.00073 368 183 286 21 276 7 253 15 1523 3435 0.44
    P1-21,41 0.05782 0.00806 0.34567 0.04726 0.04338 0.00154 0.01368 0.00105 523 280 302 36 274 10 275 21 709 1376 0.52
    P1-21,42 0.04754 0.00431 0.29931 0.02676 0.04568 0.00121 0.01409 0.00062 76 203 266 21 288 7 283 12 2124 3157 0.67
    P1-21,43 0.04968 0.00368 0.30637 0.02232 0.04474 0.00112 0.01387 0.00058 180 164 271 17 282 7 279 11 2855 4907 0.58
    P1-21,44 0.05680 0.00465 0.34817 0.02794 0.04447 0.00119 0.01341 0.00072 483 172 303 21 281 7 269 14 1812 3654 0.50
    P1-21,45 0.05066 0.00366 0.31626 0.02246 0.04529 0.00113 0.01501 0.00057 226 159 279 17 286 7 301 11 2822 4149 0.68
    P1-21,46 0.05052 0.00708 0.32152 0.04427 0.04618 0.00160 0.01111 0.00086 219 295 283 34 291 10 223 17 714 1171 0.61
    P1-21,47 0.05305 0.00471 0.33459 0.02914 0.04576 0.00125 0.01828 0.00089 331 189 293 22 288 8 366 18 1773 3605 0.49
    P1-21,48 0.05584 0.00521 0.33884 0.03096 0.04402 0.00126 0.01518 0.00072 446 195 296 23 278 8 305 14 2494 3618 0.69
    P1-21,50 0.05615 0.00799 0.34317 0.04773 0.04434 0.00167 0.01802 0.00137 458 288 300 36 280 10 361 27 591 1019 0.58
    P1-21,51 0.05960 0.00507 0.37392 0.03113 0.04552 0.00126 0.01502 0.00073 589 175 323 23 287 8 301 15 2012 3184 0.63
    P1-21,52 0.05150 0.00537 0.32448 0.03320 0.04571 0.00135 0.01495 0.00086 263 223 285 25 288 8 300 17 1310 2541 0.52
    P1-21,53 0.05517 0.00516 0.34904 0.03204 0.04591 0.00130 0.01598 0.00088 419 197 304 24 289 8 320 17 1486 2926 0.51
    P1-21,54 0.04759 0.00576 0.30852 0.03680 0.04704 0.00142 0.01487 0.00091 78 266 273 29 296 9 298 18 1023 1994 0.51
    P1-21,55 0.05538 0.00491 0.34013 0.02953 0.04456 0.00124 0.01476 0.00071 427 187 297 22 281 8 296 14 2092 3366 0.62
    P1-21,56 0.05136 0.00441 0.31346 0.02641 0.04428 0.00119 0.01489 0.00067 257 186 277 20 279 7 299 13 2133 3402 0.63
    P1-21,57 0.05305 0.00711 0.31852 0.04189 0.04356 0.00146 0.01123 0.00088 331 278 281 32 275 9 226 18 713 1390 0.51
    P1-21,58 0.05453 0.00438 0.33748 0.02660 0.04490 0.00118 0.01573 0.00066 393 171 295 20 283 7 315 13 2448 3664 0.67
    P1-21,59 0.05082 0.00429 0.31373 0.02598 0.04479 0.00119 0.01401 0.00069 233 184 277 20 283 7 281 14 1468 2832 0.52
    下载: 导出CSV

    表 3  变火山碎屑岩锆石U-Pb年龄数据表

    Table 3.  Zircon U-Pb ages of metamorphic pyroclastic rocks

    测试点
    		 同位素比值 U-Pb年龄（Ma） 含量（10−6） Th/U
    207Pb/206Pb 207Pb/235U 206Pb/238U 208Pb/232Th 207Pb/206Pb 207Pb/235U 206Pb/238U 208Pb/232Th Th U
    P1-96,01 0.05337 0.00394 0.33172 0.02395 0.04510 0.00109 0.01489 0.00065 344 158 291 18 284 7 299 13 1148 2581 0.45
    P1-96,02 0.05366 0.00338 0.33203 0.02043 0.04489 0.00103 0.01421 0.00044 357 136 291 16 283 6 285 9 3445 3912 0.88
    P1-96,03 0.05590 0.00354 0.34542 0.02136 0.04483 0.00103 0.01358 0.00047 448 135 301 16 283 6 273 9 2521 3520 0.72
    P1-96,04 0.05522 0.00357 0.33331 0.02103 0.04378 0.00102 0.01399 0.00049 421 138 292 16 276 6 281 10 2692 4024 0.67
    P1-96,05 0.04977 0.00775 0.30398 0.04668 0.04431 0.00146 0.01680 0.00108 184 327 270 36 280 9 337 22 529 969 0.55
    P1-96,06 0.05161 0.00744 0.31333 0.04446 0.04403 0.00142 0.01413 0.00113 268 301 277 34 278 9 284 22 537 1095 0.49
    P1-96,07 0.05873 0.00652 0.34093 0.03699 0.04210 0.00130 0.01215 0.00075 557 225 298 28 266 8 244 15 1716 2674 0.64
    P1-96,08 0.05626 0.00531 0.36568 0.03377 0.04714 0.00130 0.01387 0.00075 462 197 316 25 297 8 278 15 921 1670 0.55
    P1-96,09 0.05190 0.00281 0.32026 0.01698 0.04475 0.00098 0.01355 0.00044 281 119 282 13 282 6 272 9 3807 6637 0.57
    P1-96,10 0.05306 0.00297 0.32456 0.01776 0.04436 0.00098 0.01504 0.00050 331 122 285 14 280 6 302 10 3315 6312 0.53
    P1-96,11 0.05317 0.00375 0.32998 0.02279 0.04499 0.00108 0.01376 0.00057 336 152 290 17 284 7 276 11 2027 3554 0.57
    P1-96,12 0.05554 0.00658 0.34206 0.03971 0.04464 0.00139 0.01510 0.00089 434 245 299 30 282 9 303 18 993 1641 0.61
    P1-96,13 0.05302 0.00433 0.32419 0.02596 0.04432 0.00113 0.01222 0.00063 330 175 285 20 280 7 246 13 1389 2777 0.50
    P1-96,14 0.05249 0.00678 0.32643 0.04136 0.04508 0.00145 0.01585 0.00098 307 270 287 32 284 9 318 20 823 1403 0.59
    P1-96,16 0.05325 0.00601 0.33107 0.03664 0.04506 0.00133 0.01399 0.00080 340 237 290 28 284 8 281 16 810 1344 0.60
    P1-96,17 0.06160 0.00478 0.39526 0.02993 0.04651 0.00121 0.01508 0.00068 660 158 338 22 293 7 303 14 1584 2662 0.60
    P1-96,18 0.05318 0.00539 0.33636 0.03344 0.04583 0.00129 0.01499 0.00073 337 215 294 25 289 8 301 14 1830 2648 0.69
    P1-96,19 0.05352 0.00464 0.34021 0.02889 0.04606 0.00121 0.01545 0.00077 351 184 297 22 290 7 310 15 1593 3268 0.49
    P1-96,20 0.05377 0.00561 0.33424 0.03423 0.04504 0.00128 0.01440 0.00087 361 220 293 26 284 8 289 17 934 1886 0.50
    P1-96,21 0.04994 0.00427 0.33454 0.02809 0.04854 0.00125 0.01567 0.00074 192 187 293 21 306 8 314 15 1670 3208 0.52
    P1-96,22 0.05682 0.00550 0.38403 0.03638 0.04897 0.00140 0.01729 0.00090 484 201 330 27 308 9 347 18 1612 2640 0.61
    P1-96,23 0.05393 0.00506 0.35124 0.03227 0.04718 0.00132 0.01353 0.00082 368 199 306 24 297 8 272 16 1302 2637 0.49
    P1-96,24 0.04822 0.00941 0.30333 0.05841 0.04558 0.00176 0.01320 0.00138 110 405 269 46 287 11 265 28 407 822 0.50
    P1-96,25 0.05891 0.00964 0.39218 0.06283 0.04823 0.00191 0.01676 0.00140 564 321 336 46 304 12 336 28 514 944 0.54
    P1-96,27 0.05541 0.00518 0.36152 0.03315 0.04727 0.00130 0.01591 0.00081 429 196 313 25 298 8 319 16 1403 2546 0.55
    P1-96,28 0.05359 0.00854 0.35795 0.05619 0.04839 0.00169 0.01281 0.00125 354 325 311 42 305 10 257 25 489 1060 0.46
    P1-96,29 0.05286 0.00533 0.33930 0.03355 0.04650 0.00135 0.01328 0.00074 323 214 297 25 293 8 267 15 1588 2512 0.63
    P1-96,32 0.05478 0.00383 0.36200 0.02480 0.04787 0.00118 0.01607 0.00065 403 149 314 18 302 7 322 13 2809 4956 0.57
    P1-96,33 0.05327 0.00410 0.33202 0.02509 0.04516 0.00115 0.01452 0.00063 340 165 291 19 285 7 291 13 2260 3891 0.58
    P1-96,34 0.05384 0.00589 0.35687 0.03820 0.04802 0.00148 0.01953 0.00102 364 230 310 29 302 9 391 20 1243 1770 0.70
    P1-96,35 0.05060 0.00455 0.33832 0.02985 0.04844 0.00130 0.01821 0.00089 223 195 296 23 305 8 365 18 1800 3753 0.48
    P1-96,36 0.04932 0.00347 0.32204 0.02226 0.04731 0.00115 0.01537 0.00066 163 157 284 17 298 7 308 13 2070 4462 0.46
    P1-96,37 0.05489 0.00510 0.33466 0.03047 0.04418 0.00123 0.01936 0.00137 408 195 293 23 279 8 388 27 569 2832 0.20
    P1-96,38 0.04834 0.00643 0.34238 0.04471 0.05132 0.00172 0.02015 0.00156 116 287 299 34 323 11 403 31 1106 2689 0.41
    P1-96,39 0.04930 0.00622 0.31766 0.03928 0.04668 0.00153 0.01593 0.00113 162 271 280 30 294 9 320 22 1047 2244 0.47
    P1-96,40 0.05158 0.00408 0.34371 0.02665 0.04828 0.00125 0.01559 0.00069 267 172 300 20 304 8 313 14 2640 4314 0.61
    P1-96,41 0.05258 0.00425 0.35925 0.02851 0.04951 0.00130 0.01732 0.00069 311 174 312 21 312 8 347 14 3472 4412 0.79
    P1-96,42 0.05136 0.00396 0.35579 0.02694 0.05020 0.00129 0.01749 0.00072 257 168 309 20 316 8 351 14 3324 5181 0.64
    P1-96,43 0.05375 0.00470 0.34399 0.02948 0.04638 0.00128 0.01924 0.00095 360 186 300 22 292 8 385 19 2359 4959 0.48
    P1-96,44 0.04839 0.00550 0.33030 0.03691 0.04947 0.00147 0.01888 0.00110 118 248 290 28 311 9 378 22 1048 2229 0.47
    P1-96,45 0.05636 0.00926 0.36933 0.05942 0.04749 0.00192 0.01856 0.00172 466 328 319 44 299 12 372 34 399 938 0.43
    P1-96,47 0.05382 0.00422 0.34731 0.02671 0.04677 0.00122 0.01732 0.00082 363 167 303 20 295 8 347 16 1958 3913 0.50
    P1-96,49 0.04563 0.01092 0.31376 0.07401 0.04984 0.00235 0.01497 0.00194 0 473 277 57 314 14 300 39 352 891 0.39
    P1-96,50 0.05166 0.00410 0.34090 0.02653 0.04783 0.00125 0.01692 0.00074 270 172 298 20 301 8 339 15 2426 4129 0.59
    P1-96,51 0.05396 0.00588 0.37005 0.03952 0.04972 0.00153 0.02095 0.00126 369 229 320 29 313 9 419 25 1275 2750 0.46
    P1-96,52 0.05155 0.00428 0.35221 0.02868 0.04954 0.00133 0.01874 0.00079 266 180 306 22 312 8 375 16 3232 4829 0.67
    P1-96,53 0.05155 0.00581 0.34043 0.03763 0.04789 0.00150 0.01645 0.00094 266 239 298 29 302 9 330 19 1591 2508 0.63
    P1-96,54 0.04857 0.00805 0.33107 0.05393 0.04943 0.00192 0.01467 0.00153 127 349 290 41 311 12 294 31 660 1201 0.55
    P1-96,55 0.05281 0.00500 0.35815 0.03324 0.04919 0.00140 0.01856 0.00113 321 202 311 25 310 9 372 22 1750 4106 0.43
    P1-96,56 0.05375 0.00630 0.36397 0.04183 0.04912 0.00158 0.02083 0.00117 360 245 315 31 309 10 417 23 1294 2199 0.59
    P1-96,57 0.05379 0.00427 0.37677 0.02936 0.05081 0.00135 0.01700 0.00081 362 169 325 22 320 8 341 16 2950 5209 0.57
    P1-96,58 0.04874 0.00392 0.34924 0.02763 0.05198 0.00136 0.01809 0.00075 135 179 304 21 327 8 362 15 3513 5178 0.68
    P1-96,59 0.05532 0.00733 0.38234 0.04962 0.05014 0.00176 0.01896 0.00139 425 271 329 36 315 11 380 28 778 1594 0.49
    P1-96,60 0.05047 0.00480 0.33543 0.03137 0.04822 0.00136 0.01832 0.00102 217 206 294 24 304 8 367 20 1401 3019 0.46
    下载: 导出CSV

    表 4  花岗质砾石的锆石U-Pb年龄数据表

    Table 4.  Zircon U-Pb ages of granitic gravel

    测试点 同位素比值 U-Pb年龄（Ma） 含量（10−6） Th/U
    207Pb/206Pb 207Pb/235U 206Pb/238U 208Pb/232Th 207Pb/206Pb 207Pb/235U 206Pb/238U 208Pb/232Th Th U
    D1052,1 0.05400 0.00234 0.32143 0.01357 0.04317 0.00090 0.01372 0.00040 371 94 283 10 272 6 275 8 4395 7940 0.55
    D1052,2 0.05811 0.00188 0.36685 0.01153 0.04579 0.00092 0.01671 0.00044 533 70 317 9 289 6 335 9 7166 21172 0.34
    D1052,3 0.05255 0.00235 0.31522 0.01374 0.04350 0.00091 0.01512 0.00049 310 99 278 11 275 6 303 10 3009 8739 0.34
    D1052,4 0.05424 0.00270 0.35151 0.01709 0.04701 0.00101 0.01602 0.00061 381 108 306 13 296 6 321 12 1893 6174 0.31
    D1052,6 0.05354 0.00252 0.32674 0.01501 0.04427 0.00094 0.01457 0.00049 352 103 287 11 279 6 292 10 3046 7791 0.39
    D1052,8 0.05594 0.00262 0.39012 0.01778 0.05058 0.00108 0.01815 0.00070 450 101 335 13 318 7 364 14 3913 17397 0.22
    D1052,9 0.05826 0.00273 0.37486 0.01712 0.04667 0.00100 0.02199 0.00073 539 100 323 13 294 6 440 15 3137 10819 0.29
    D1052,12 0.05107 0.00410 0.33786 0.02657 0.04799 0.00121 0.02222 0.00114 244 175 296 20 302 7 444 22 17334 63444 0.27
    D1052,13 0.05175 0.00361 0.36019 0.02459 0.05049 0.00120 0.02067 0.00099 274 152 312 18 318 7 413 20 2711 9584 0.28
    D1052,14 0.05282 0.00422 0.36614 0.02860 0.05028 0.00127 0.01914 0.00097 321 171 317 21 316 8 383 19 2660 7097 0.37
    D1052,16 0.05242 0.00549 0.41347 0.04236 0.05721 0.00168 0.02926 0.00198 304 222 351 30 359 10 583 39 1582 5886 0.27
    D1052,17 0.05767 0.00382 0.42986 0.02777 0.05407 0.00129 0.02924 0.00131 517 139 363 20 339 8 583 26 3030 11556 0.26
    D1052,18 0.05012 0.00626 0.34159 0.04175 0.04944 0.00160 0.02093 0.00166 201 266 298 32 311 10 419 33 1363 4545 0.30
    D1052,19 0.05087 0.00457 0.36628 0.03222 0.05223 0.00139 0.02466 0.00114 235 195 317 24 328 9 492 22 2541 5598 0.45
    D1052,20 0.04934 0.00516 0.33584 0.03442 0.04937 0.00141 0.01886 0.00127 164 228 294 26 311 9 378 25 1540 5063 0.30
    D1052,21 0.05467 0.00297 0.39698 0.02106 0.05267 0.00117 0.02549 0.00104 399 117 340 15 331 7 509 20 3824 18291 0.21
    D1052,23 0.05243 0.00341 0.37018 0.02354 0.05121 0.00119 0.01930 0.00089 304 142 320 17 322 7 386 18 2942 11049 0.27
    D1052,24 0.05313 0.00366 0.36805 0.02479 0.05025 0.00120 0.02019 0.00072 335 149 318 18 316 7 404 14 5753 9298 0.62
    D1052,25 0.06034 0.00314 0.47962 0.02429 0.05766 0.00128 0.02885 0.00104 616 109 398 17 361 8 575 20 6708 23529 0.29
    D1052,27 0.05743 0.00376 0.39242 0.02509 0.04957 0.00118 0.01910 0.00088 508 138 336 18 312 7 382 17 3441 10876 0.32
    D1052,28 0.05575 0.00428 0.38286 0.02872 0.04982 0.00125 0.02112 0.00099 442 163 329 21 313 8 422 20 24908 68272 0.36
    D1052,29 0.05540 0.00319 0.36743 0.02062 0.04811 0.00109 0.01886 0.00074 428 124 318 15 303 7 378 15 3263 9877 0.33
    D1052,30 0.05856 0.00345 0.41718 0.02393 0.05167 0.00118 0.02495 0.00100 551 124 354 17 325 7 498 20 2882 10137 0.28
    下载: 导出CSV

    表 5  斜长角闪岩和浅粒岩主量元素（%）与微量元素（10–6）

    Table 5.  Main (%) and trace (10–6) elements in plagioclase amphibolite and leptite

    送样号D1133-2-2hD1133-2-3hD1133-2-4hD0170-1-1HD0170-1-3HD0170-1-5H
    SiO249.2249.2149.2775.4180.8878.86
    TiO22.312.332.380.140.170.14
    Al2O316.6616.6716.8811.229.339.33
    Fe2O34.734.225.132.491.392.18
    FeO6.356.826.320.500.500.45
    MnO0.170.170.160.070.050.07
    MgO5.325.215.220.070.090.06
    CaO8.338.757.915.372.895.02
    Na2O4.094.154.691.232.301.74
    K2O0.670.370.232.811.801.23
    P2O50.350.360.350.020.020.02
    LOI0.890.800.630.500.410.73
    Total99.0999.0699.1799.8399.82899.82
    Li30.328.826.02.674.024.18
    Sc25.527.828.93.333.982.54
    V2552732707.784.809.10
    Cr10199.694.11.431.561.1
    Co39.241.740.80.5500.4500.500
    Ni76.978.471.82.104.522.16
    Cu12984.577.63.062.323.00
    Zn11711311822.330.415.8
    Ga21.921.522.133.920.925.0
    Rb25.810.36.2512374.852.4
    Sr341314398256141206
    Y38.238.841.358.055.047.2
    Zr266264283316318286
    Nb6.746.286.7313.113.611.6
    Cs2.271.940.671.120.8100.620
    Ba79.795.427.6624439384
    La16.716.817.643.741.638.0
    Ce44.343.845.994.493.381.2
    Pr6.256.416.7812.111.410.4
    Nd28.830.131.347.947.041.8
    Sm7.367.887.9310.810.79.22
    Eu2.212.332.371.631.661.44
    Gd8.118.378.8510.911.19.70
    Tb1.261.351.381.921.891.63
    Dy8.027.918.4111.110.89.67
    Ho1.541.641.712.262.272.02
    Er4.584.754.906.747.095.98
    Tm0.7900.8000.8101.221.181.06
    Yb4.334.534.676.556.575.92
    Lu0.7300.7500.7701.121.130.980
    Hf6.546.607.109.619.618.78
    Ta0.5000.4600.4801.091.050.960
    Pb9.298.1313.328.318.518.0
    Th3.933.483.7216.615.714.4
    U1.261.231.393.783.763.34
    下载: 导出CSV
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