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    川西可尔因地区侏倭组变质沉积岩地球化学、碎屑锆石U⁃Pb年龄和Lu⁃Hf同位素特征及其地质意义

    袁彦伟 费光春 郑硌 蒋建文 马志平 江笑梅 张贵

    袁彦伟, 费光春, 郑硌, 蒋建文, 马志平, 江笑梅, 张贵, 2022. 川西可尔因地区侏倭组变质沉积岩地球化学、碎屑锆石U⁃Pb年龄和Lu⁃Hf同位素特征及其地质意义. 地球科学, 47(8): 2902-2924. doi: 10.3799/dqkx.2021.163
    引用本文: 袁彦伟, 费光春, 郑硌, 蒋建文, 马志平, 江笑梅, 张贵, 2022. 川西可尔因地区侏倭组变质沉积岩地球化学、碎屑锆石U⁃Pb年龄和Lu⁃Hf同位素特征及其地质意义. 地球科学, 47(8): 2902-2924. doi: 10.3799/dqkx.2021.163
    Yuan Yanwei, Fei Guangchun, Zheng Luo, Jiang Jianwen, Ma Zhiping, Jiang Xiaomei, Zhang Gui, 2022. U⁃Pb Age and Lu⁃Hf Isotope of Detrital Zircons, Geochemical Characteristics and Geological Significance for Zhuwo Formation Meta⁃Sedimentary Rocks in Ke'eryin Region, Western Sichuan. Earth Science, 47(8): 2902-2924. doi: 10.3799/dqkx.2021.163
    Citation: Yuan Yanwei, Fei Guangchun, Zheng Luo, Jiang Jianwen, Ma Zhiping, Jiang Xiaomei, Zhang Gui, 2022. U⁃Pb Age and Lu⁃Hf Isotope of Detrital Zircons, Geochemical Characteristics and Geological Significance for Zhuwo Formation Meta⁃Sedimentary Rocks in Ke'eryin Region, Western Sichuan. Earth Science, 47(8): 2902-2924. doi: 10.3799/dqkx.2021.163

    川西可尔因地区侏倭组变质沉积岩地球化学、碎屑锆石U⁃Pb年龄和Lu⁃Hf同位素特征及其地质意义

    doi: 10.3799/dqkx.2021.163
    基金项目: 

    国家自然科学基金 41702074

    四川省科技厅应用基础研究项目 2019yj0285

    四川省科技厅应用基础研究项目 2021yj0309

    成都理工大学中青年教学骨干教师 JXGG201701

    详细信息
      作者简介:

      袁彦伟(1997-),男,硕士研究生,地球化学专业. ORCID:0000-0001-7937-3245.E-mail:503073850@qq.com

      通讯作者:

      费光春,ORCID: 0000-0001-7377-7329.E-mail: feiguangchun07@cdut.cn

    • 中图分类号: P595

    U⁃Pb Age and Lu⁃Hf Isotope of Detrital Zircons, Geochemical Characteristics and Geological Significance for Zhuwo Formation Meta⁃Sedimentary Rocks in Ke'eryin Region, Western Sichuan

    • 摘要: 为研究可尔因地区侏倭组的物源体系及其与可尔因地区李家沟伟晶岩之间的成因联系,对出露于西康群侏倭组中的变质沉积岩进行了全岩地球化学、锆石U⁃Pb定年以及Lu⁃Hf同位素分析. 分析结果显示侏倭组变质沉积岩具高SiO2、Al2O3的地球化学特征,稀土元素配分曲线整体右倾,与澳大利亚晚太古宙沉积岩(PAAS)配分一致. 阴极发光图像(CL)显示,碎屑锆石普遍具有岩浆震荡环带,部分受重结晶改造及存在变质增生边. 碎屑锆石的U⁃Pb年龄谱具有313~227 Ma和461~401 Ma两个主峰以及938~774 Ma和2 048~1 928 Ma两个次峰. εHft)值在-17.1~+13.3之间,二阶段模式年龄(TDM2)分布在3 240~499 Ma之间. 综合全岩地球化学、锆石U⁃Pb⁃Hf同位素特征及区域地质对比,认为可尔因地区侏倭组变质沉积岩的物源主要为来自大陆岛弧的长英质岩石,并伴有一些再循环沉积物,主要接收了来自东昆仑、北秦岭及扬子陆块的物质. 可尔因地区李家沟伟晶岩为侏倭组变质沉积岩直接部分熔融固结形成.

       

    • 图  1  川西可尔因地质简图及采样位置

      Li et al.(2019)Fei et al.(2020)修改;年龄数据引自Fei et al.(2020);费光春(未发表);五角星为本次研究采样点,三角形为前人研究采样点

      Fig.  1.  The geological sketch of Ke'eryin in western Sichuan

      图  2  川西可尔因地区侏倭组变质沉积岩野外及镜下照片

      a. 伟晶岩和围岩(T3zw)分界线;b. 侏倭组基岩;c. ZK1703⁃2手标本,深灰色部分为绿泥石黑云母石英角岩,浅灰色为白云母钠长花岗岩;d. PD3650⁃2镜下照片;e. PD3650⁃6镜下照片;f. LW⁃81镜下照片;Qz. 石英;Ms. 白云母;Bt. 黑云母;Ep. 绿帘石;Pl. 斜长石;Aln. 褐帘石;Tur. 电气石

      Fig.  2.  Field photographs and micrographs of meta⁃sedimentary rocks from Zhuwo Formation in Ke'eryin area, western Sichuan

      图  3  川西可尔因地区侏倭组变质沉积岩典型碎屑锆石阴极发光图(实线为U⁃Pb测年位置,虚线为Hf同位素分析位置)

      Fig.  3.  Cathodicluminescence images of typical detrital zircons of meta⁃sedimentary rocks from Zhuwo Formation in Ke'eryin area, western Sichuan (Solidline is location of in⁃situ zircon U⁃Pb analysis; dotted line is location of in⁃situ zircon Hf analysis)

      图  4  川西可尔因地区侏倭组变质沉积岩锆石Age⁃Th/U图(a)和U⁃Pb年龄谐和图(b)

      Fig.  4.  Zircon age⁃Th/U image (a) and U⁃Pb age concordia diagram (b) of meta⁃sedimentary rocks from Zhuwo Formationin Ke'eryin area, western Sichuan

      图  5  川西松潘甘孜造山带三叠系复理石沉积及区内部分地层碎屑锆石U⁃Pb年龄频率图

      松潘甘孜造山带三叠系沉积物数据刘飞等(2006)Weislogel et al.(2006)Enkelmann et al.(2007)王伟等(2007)秦宇龙等(2020);甲基卡地区侏倭组数据秦宇龙等(2020)

      Fig.  5.  Detrital zircon U⁃Pb age histograms of Triassic sediments and some strata in SGFB, western Sichuan

      图  6  川西可尔因地区侏倭组变质沉积岩碎屑锆石U⁃Pb年龄⁃εHf(t)图(a)、TDM2频率直方图(b)

      Fig.  6.  U⁃Pb age versus εHf(t) value plot (a) and TDM2 histogram (b) of detrital zircons from Zhuwo Formation meta⁃sedimentary rocks in Ke'eryin area, western Sichuan

      图  7  川西可尔因地区侏倭组变质沉积岩及松潘甘孜三叠系沉积物稀土配分模式图(a)及微量元素蛛网图(b)

      PASS⁃澳大利亚后太古宙沉积岩平均值, 据Mclennan(1989);松潘甘孜三叠系沉积物数据据于远山等(2018)Gong et al., (2021); 标准化数值据Sun and McDonough(1989)

      Fig.  7.  Chondrite⁃normalized REE patterns (a) and primitive mantle⁃normalized trace element spider diagrams (b)

      图  8  川西可尔因地区侏倭组变质沉积岩西蒙南(a)和∑REE⁃La/Yb(b)原岩恢复图解

      Simonen(1953)赵振华(1997)

      Fig.  8.  Simonen(a) and ∑REE⁃La/Yb plot(b) of sedimentary rocks from Zhuwo Formation in Ke'eryin area, western Sichuan

      图  9  川西松潘甘孜三叠系西康群沉积岩物源属性判别图解

      Floyd and Leveridge(1987)Gu et al.(2002);松潘甘孜造山带三叠系沉积物数据白宪洲等(2010)于远山等(2018)

      Fig.  9.  Discrimination diagram of provenance from Triassic Xikang Group in SGFB, western Sichuan

      图  10  川西松潘甘孜造山带三叠系西康群沉积岩La⁃Th⁃Sc(a)、Th⁃Sc⁃Zr/10(b)物源区构造环境判别图

      Bhatia and Crook(1986); 松潘甘孜造山带三叠系复理石沉积数据曾宜君等(2006)白宪洲等(2010)于远山等(2018)

      Fig.  10.  Discriminate La⁃Th⁃Sc diagram(a) and Th⁃Sc⁃Zr/10 diagram(b) of tectonic setting meta⁃sedimentary rocks from Triassic Xikang Group in SGFB, western Sichuan

      图  11  松潘甘孜造山带周缘构造单元锆石U⁃Pb年龄分布

      b. 据裴磊等(2017);c~f. 据Shi et al.(2013)

      Fig.  11.  Histograms of U⁃Pb ages ofzircons in the peripheral tectonic units of the SGFB

      图  12  晚三叠世松潘甘孜可尔因地区侏倭组物质来源示意图(据邓飞,2006改)

      Fig.  12.  Sketch map for provenance of Zhuwo Formation in Ke'eryin area of SongpanGanzi in the Late Triassic(modified after Deng et al., 2006)

      图  13  川西可尔因花岗岩(a)及伟晶岩(b)Hf同位素二阶段模式年龄频率直方图

      数据来源Fei et al.(2020)

      Fig.  13.  TDM2 histogram of Hf isotope from granite(a) andpegmatite(b)in Ke'eryin area, western Sichuan

      表  1  川西可尔因侏倭组变质沉积岩碎屑锆石LA-ICP-MS U-Pb分析结果(样品PD3650-2)

      Table  1.   LA⁃ICP⁃MS U⁃Pb analysis results of detrital zircons from Zhuwo Formation meta⁃sedimentary rocks in Ke'eryinaera, western Sichuan(Sample PD3650⁃2)

      点位 含量(×10-6 同位素比值 年龄(Ma)
      Pb Th U Th/U 207Pb/206Pb 207Pb/235U 206Pb/238U 207Pb/206Pb 207Pb/235U 206Pb/238U
      1 184 522 706 0.739 0 0.057 8 0.001 2 0.513 6 0.012 5 0.064 6 0.001 5 523 45 421 8 403 9
      2 18 28 75 0.376 7 0.062 9 0.002 1 0.531 0 0.018 6 0.061 4 0.001 5 704 68 433 12 384 9
      3 86 230 309 0.746 2 0.053 8 0.001 2 0.484 6 0.012 1 0.065 5 0.001 6 362 48 401 8 409 9
      4 100 98 135 0.724 3 0.079 6 0.001 7 2.029 1 0.051 0 0.185 2 0.004 4 1 188 42 1 125 17 1 095 24
      5 106 454 613 0.740 0 0.055 8 0.001 3 0.335 3 0.009 0 0.043 7 0.001 0 443 52 294 7 276 6
      6 64 122 226 0.540 7 0.056 4 0.001 2 0.552 3 0.014 0 0.071 2 0.001 7 468 48 447 9 443 10
      7 38 66 139 0.477 2 0.055 2 0.001 3 0.501 4 0.013 5 0.066 0 0.001 6 420 52 413 9 412 9
      8 65 250 395 0.6316 0.051 1 0.001 2 0.287 0 0.007 4 0.040 8 0.001 0 245 51 256 6 258 6
      9 37 121 172 0.702 0 0.053 1 0.001 3 0.375 8 0.010 5 0.051 4 0.001 2 334 56 324 8 323 7
      10 27 136 164 0.829 5 0.052 9 0.001 5 0.309 3 0.009 6 0.042 5 0.001 0 325 64 274 7 268 6
      11 80 2 354 0.005 4 0.054 1 0.001 2 0.401 2 0.010 4 0.053 8 0.001 3 377 51 343 8 338 8
      12 24 18 36 0.482 9 0.077 4 0.003 4 2.024 3 0.089 6 0.190 1 0.004 8 1 131 84 1 124 30 1 122 26
      13 549 217 318 0.681 9 0.164 2 0.003 4 9.591 4 0.229 3 0.424 3 0.009 9 2 500 34 2 396 22 2 280 45
      14 174 448 675 0.664 2 0.055 4 0.001 2 0.494 7 0.012 2 0.064 8 0.001 5 429 47 408 8 405 9
      15 119 373 794 0.469 4 0.050 9 0.001 2 0.267 9 0.006 9 0.038 3 0.000 9 235 52 241 6 242 6
      16 145 74 115 0.639 5 0.125 5 0.002 6 5.380 9 0.129 3 0.311 5 0.007 3 2 036 36 1 882 21 1 748 36
      17 7 31 45 0.694 3 0.057 9 0.006 5 0.332 6 0.036 8 0.041 7 0.001 2 527 227 292 28 263 8
      18 261 58 410 0.142 3 0.073 8 0.001 5 1.540 7 0.037 0 0.151 7 0.003 5 1 035 41 947 15 911 20
      19 98 309 639 0.483 9 0.052 5 0.001 2 0.273 4 0.006 9 0.037 8 0.000 9 306 50 245 6 239 5
      20 95 43 372 0.116 2 0.056 4 0.001 2 0.505 4 0.012 6 0.065 0 0.001 5 469 48 415 9 406 9
      21 24 101 122 0.829 1 0.053 9 0.001 5 0.365 5 0.010 7 0.049 2 0.001 2 367 59 316 8 310 7
      22 43 282 195 1.443 8 0.054 1 0.001 3 0.408 9 0.010 6 0.054 9 0.001 3 376 51 348 8 344 8
      23 83 93 166 0.560 7 0.067 2 0.001 6 1.207 4 0.032 2 0.130 5 0.003 0 844 49 804 15 790 17
      24 168 516 1144 0.450 7 0.054 3 0.001 2 0.278 6 0.006 7 0.037 3 0.000 9 381 47 250 5 236 5
      25 32 135 205 0.659 5 0.052 8 0.001 3 0.288 3 0.007 8 0.039 6 0.000 9 320 55 257 6 251 6
      26 57 426 385 1.105 6 0.053 3 0.001 2 0.270 3 0.006 9 0.036 8 0.000 9 341 51 243 6 233 5
      27 106 387 432 0.896 6 0.054 8 0.001 2 0.453 1 0.011 1 0.060 0 0.001 4 405 47 380 8 376 8
      28 116 92 192 0.478 9 0.068 5 0.001 5 1.390 2 0.033 6 0.147 4 0.003 4 883 43 885 14 886 19
      29 302 124 236 0.525 3 0.119 3 0.002 5 5.227 9 0.124 1 0.318 2 0.007 3 1 946 37 1 857 20 1 781 36
      30 66 71 245 0.289 0 0.055 2 0.001 3 0.503 6 0.013 0 0.066 2 0.001 5 420 50 414 9 413 9
      31 171 213 339 0.628 9 0.070 3 0.001 5 1.236 0 0.029 7 0.127 6 0.002 9 938 43 817 13 774 17
      32 12 71 71 1.001 7 0.052 3 0.001 9 0.300 3 0.011 2 0.041 7 0.001 0 298 80 267 9 263 6
      33 40 129 266 0.486 6 0.051 2 0.001 3 0.268 7 0.007 5 0.038 1 0.000 9 250 58 242 6 241 5
      34 27 143 166 0.858 6 0.053 1 0.001 3 0.299 6 0.008 1 0.040 9 0.000 9 334 55 266 6 259 6
      35 137 365 912 0.400 0 0.051 7 0.001 1 0.270 7 0.006 6 0.038 0 0.000 9 270 49 243 5 241 5
      36 35 106 168 0.631 3 0.052 7 0.001 5 0.346 4 0.010 3 0.047 7 0.001 1 317 62 302 8 300 7
      37 74 610 391 1.559 2 0.054 7 0.001 3 0.363 9 0.009 2 0.048 3 0.001 1 399 50 315 7 304 7
      38 44 83 155 0.534 0 0.055 7 0.001 7 0.560 5 0.018 0 0.073 0 0.001 7 440 66 452 12 454 10
      39 40 21 36 0.581 9 0.098 3 0.002 2 3.674 3 0.091 4 0.271 2 0.006 2 1 592 41 1 566 20 1 547 31
      40 47 7 242 0.029 8 0.056 9 0.001 5 0.419 3 0.012 0 0.053 5 0.001 2 485 58 356 9 336 8
      41 118 386 464 0.832 1 0.056 8 0.001 3 0.505 6 0.012 6 0.064 6 0.001 5 482 49 416 8 404 9
      42 50 150 190 0.792 8 0.056 8 0.001 3 0.524 9 0.013 5 0.067 1 0.001 5 483 51 428 9 418 9
      43 40 173 206 0.839 5 0.075 4 0.002 0 0.516 8 0.014 7 0.049 7 0.001 1 1 080 52 423 10 313 7
      44 36 98 240 0.407 6 0.055 1 0.001 6 0.275 3 0.008 3 0.036 2 0.000 8 417 61 247 7 229 5
      45 158 473 788 0.600 0 0.050 4 0.001 1 0.345 3 0.008 2 0.049 7 0.001 1 213 49 301 6 313 7
      46 28 47 20 2.364 1 0.126 4 0.003 0 6.442 7 0.166 7 0.369 9 0.008 5 2 048 41 2 038 23 2 029 40
      47 72 129 415 0.310 4 0.056 9 0.001 3 0.334 5 0.008 4 0.042 7 0.001 0 485 50 293 6 269 6
      48 168 196 609 0.321 3 0.056 1 0.001 3 0.535 9 0.013 2 0.069 4 0.001 6 454 49 436 9 432 9
      49 49 212 323 0.657 0 0.053 3 0.001 3 0.283 3 0.007 4 0.038 6 0.000 9 342 53 253 6 244 5
      50 99 43 178 0.239 3 0.071 3 0.001 6 1.394 5 0.034 1 0.141 9 0.003 2 966 45 887 14 855 18
      51 196 55 152 0.364 5 0.118 1 0.002 5 5.185 0 0.121 8 0.318 5 0.007 1 1 928 37 1 850 20 1 782 35
      52 474 141 269 0.526 3 0.167 4 0.003 6 10.86 8 0.256 3 0.470 9 0.010 6 2 532 35 2 512 22 2 488 46
      53 44 198 315 0.629 0 0.050 6 0.001 4 0.249 5 0.007 4 0.035 8 0.000 8 222 63 226 6 227 5
      54 78 290 518 0.559 1 0.054 7 0.001 2 0.280 5 0.006 9 0.037 2 0.000 8 399 49 251 5 236 5
      55 74 398 506 0.785 7 0.050 4 0.001 1 0.258 8 0.006 4 0.037 3 0.000 8 213 51 234 5 236 5
      56 535 131 402 0.325 5 0.124 6 0.002 6 6.057 0 0.141 1 0.352 7 0.007 9 2 023 37 1 984 20 1 947 38
      57 123 67 128 0.526 6 0.114 1 0.002 5 3.798 4 0.090 0 0.241 4 0.005 4 1 866 38 1 592 19 1 394 28
      58 107 411 606 0.678 2 0.053 5 0.001 2 0.333 7 0.008 2 0.045 2 0.001 0 351 50 292 6 285 6
      59 61 71 224 0.317 7 0.058 1 0.001 4 0.515 0 0.013 4 0.064 3 0.001 4 534 52 422 9 402 9
      60 44 38 32 1.195 3 0.125 9 0.002 8 6.188 4 0.151 4 0.356 6 0.008 0 2 041 39 2 003 21 1 966 38
      61 282 471 1022 0.460 4 0.055 4 0.001 2 0.566 1 0.013 6 0.074 1 0.001 7 428 48 456 9 461 10
      62 91 518 619 0.836 6 0.055 1 0.001 2 0.283 2 0.006 9 0.037 3 0.000 8 415 48 253 5 236 5
      63 215 300 243 1.232 3 0.088 8 0.001 9 2.662 6 0.062 4 0.217 5 0.004 8 1 399 40 1 318 17 1 269 26
      64 361 517 1369 0.377 5 0.056 6 0.001 2 0.504 8 0.011 9 0.064 7 0.001 4 476 47 415 8 404 9
      65 799 277 552 0.5007 0.179 5 0.003 8 9.012 8 0.207 8 0.364 2 0.008 1 2 648 34 2 339 21 2 002 38
      66 208 329 839 0.391 7 0.057 7 0.001 2 0.510 0 0.012 0 0.064 2 0.001 4 516 47 418 8 401 9
      67 199 899 1344 0.668 8 0.051 6 0.001 1 0.273 0 0.006 4 0.038 4 0.000 9 267 49 245 5 243 5
      68 40 258 178 1.446 7 0.054 4 0.001 3 0.432 3 0.011 4 0.057 7 0.001 3 387 54 365 8 361 8
      69 92 253 365 0.695 2 0.054 5 0.001 2 0.484 0 0.011 7 0.064 4 0.001 4 391 49 401 8 403 9
      70 231 90 182 0.494 4 0.119 7 0.002 5 5.376 7 0.124 3 0.325 7 0.007 2 1 952 37 1 881 20 1 817 35
      71 30 51 109 0.468 0 0.055 0 0.002 0 0.506 2 0.018 6 0.066 7 0.001 5 414 78 416 13 416 9
      72 105 222 406 0.545 6 0.056 1 0.001 3 0.508 8 0.012 5 0.065 8 0.001 4 454 50 418 8 411 9
      73 249 612 1510 0.405 6 0.055 7 0.001 2 0.320 2 0.007 5 0.041 7 0.000 9 442 47 282 6 263 6
      74 86 270 617 0.437 7 0.057 3 0.001 3 0.281 9 0.006 8 0.035 7 0.000 8 503 49 252 5 226 5
      75 120 162 475 0.341 1 0.055 7 0.001 2 0.507 5 0.012 1 0.066 1 0.001 5 440 48 417 8 413 9
      76 172 182 549 0.331 3 0.057 8 0.001 3 0.673 3 0.016 4 0.084 5 0.001 9 523 49 523 10 523 11
      77 23 21 71 0.289 3 0.057 1 0.002 0 0.629 5 0.022 0 0.079 9 0.001 8 496 74 496 14 496 11
      78 97 135 366 0.368 0 0.056 6 0.001 3 0.536 4 0.013 1 0.068 7 0.001 5 476 50 436 9 428 9
      79 70 89 250 0.356 6 0.056 9 0.001 4 0.553 5 0.014 0 0.070 5 0.001 5 489 52 447 9 439 9
      80 159 311 556 0.559 9 0.056 2 0.001 3 0.570 9 0.014 0 0.073 6 0.001 6 461 50 459 9 458 10
      81 127 471 767 0.614 4 0.056 2 0.001 2 0.307 0 0.007 3 0.039 6 0.000 9 459 48 272 6 251 5
      82 46 162 245 0.663 4 0.055 0 0.001 3 0.340 9 0.008 6 0.045 0 0.001 0 412 51 298 7 284 6
      83 308 112 549 0.204 4 0.077 3 0.001 6 1.532 3 0.035 2 0.143 7 0.003 1 1 130 42 943 14 866 18
      84 142 254 508 0.500 9 0.057 1 0.001 4 0.531 9 0.013 3 0.067 6 0.001 5 495 52 433 9 422 9
      85 233 999 1302 0.767 8 0.055 8 0.001 2 0.352 9 0.008 1 0.045 8 0.001 0 446 47 307 6 289 6
      86 50 305 303 1.007 0 0.057 3 0.001 3 0.326 5 0.008 0 0.041 4 0.000 9 501 51 287 6 261 6
      87 112 106 91 1.162 0 0.119 7 0.002 6 5.296 7 0.124 7 0.321 0 0.007 0 1 951 39 1 868 20 1 795 34
      88 40 300 256 1.172 8 0.052 9 0.001 4 0.283 5 0.007 7 0.038 8 0.000 8 326 58 253 6 246 5
      89 48 184 233 0.791 9 0.056 5 0.001 4 0.422 8 0.010 7 0.054 3 0.001 2 469 53 358 8 341 7
      90 1261 97 1140 0.084 7 0.100 6 0.002 1 3.826 2 0.086 7 0.275 9 0.005 9 1 635 39 1 598 18 1 571 30
      91 79 314 504 0.623 2 0.054 7 0.001 2 0.304 0 0.007 2 0.040 3 0.000 9 400 49 270 6 255 5
      92 774 317 419 0.756 7 0.174 8 0.003 7 11.246 0 0.254 1 0.466 7 0.010 0 2 604 35 2 544 21 2 469 44
      93 152 281 592 0.475 1 0.058 3 0.001 3 0.534 1 0.012 3 0.066 4 0.001 4 541 47 435 8 415 9
      94 79 293 357 0.820 7 0.056 2 0.001 3 0.442 2 0.010 4 0.057 1 0.001 2 460 49 372 7 358 7
      95 47 170 305 0.557 0 0.055 3 0.001 3 0.293 9 0.007 2 0.038 5 0.000 8 425 50 262 6 244 5
      96 58 198 361 0.547 6 0.052 0 0.001 2 0.292 4 0.007 1 0.040 8 0.000 9 284 52 261 6 258 5
      97 468 20 1210 0.016 9 0.062 1 0.001 4 0.893 0 0.020 7 0.104 2 0.002 2 679 46 648 11 639 13
      98 142 33 255 0.131 1 0.072 9 0.001 6 1.417 6 0.032 7 0.141 0 0.003 0 1012 43 896 14 850 17
      99 595 130 300 0.433 8 0.199 5 0.004 2 13.69 1 0.308 7 0.497 8 0.010 6 2 822 34 2 729 21 26 04 46
      100 162 59 264 0.222 1 0.073 5 0.001 6 1.587 3 0.036 4 0.156 7 0.003 3 1027 43 965 14 938 19
      下载: 导出CSV

      表  2  川西可尔因侏倭组变质沉积岩碎屑锆石LA-ICP-MS Lu-Hf同位素测试结果

      Table  2.   LA⁃ICP⁃MS Lu⁃Hf isotopic test results of detrital zircons from Zhuwo Formation meta⁃sedimentary rocks in Ke'eryin area, western Sichuan


      年龄(Ma) 176Yb/177Hf 176Lu/177Hf 176Hf/177Hf (176Hf/177Hf)i εHf() εHf(t) TDM1(Ma) TDM2(Ma) fLu/Hf
      3 409 0.036 7 0.001 3 0.282 749 0.000 021 0.282 739 -0.8 7.8 718 899 -0.96
      5 276 0.029 4 0.001 2 0.282 509 0.000 020 0.282 503 -9.3 -3.5 1 055 1 515 -0.96
      6 443 0.054 4 0.002 1 0.282 740 0.000 015 0.282 722 -1.1 8.0 747 915 -0.94
      7 412 0.011 0 0.000 4 0.282 279 0.000 016 0.282 275 -17.5 -8.5 1 352 1 937 -0.99
      8 258 0.048 5 0.001 7 0.282 654 0.000 014 0.282 646 -4.2 1.2 862 1 205 -0.95
      11 338 0.003 4 0.000 1 0.282 418 0.000 016 0.282 417 -12.5 -5.1 1 151 1 668 -1.00
      15 242 0.039 2 0.001 4 0.282 509 0.000 016 0.282 502 -9.3 -4.2 1 063 1 538 -0.96
      16 2036 0.017 6 0.000 6 0.281 624 0.000 029 0.281 602 -40.6 4.1 2 253 2 387 -0.98
      18 911 0.042 9 0.001 4 0.282 091 0.000 020 0.282 067 -24.1 -4.8 1 650 2 081 -0.96
      19 239 0.049 7 0.001 6 0.282 720 0.000 021 0.282 712 -1.9 3.2 766 1 067 -0.95
      23 790 0.022 2 0.000 7 0.282 217 0.000 013 0.282 207 -19.6 -2.5 1 447 1 848 -0.98
      25 251 0.034 1 0.001 2 0.282 659 0.000 012 0.282 653 -4.0 1.3 844 1 193 -0.96
      28 886 0.042 9 0.001 4 0.282 257 0.000 018 0.282 233 -18.2 0.5 1 419 1 728 -0.96
      29 1946 0.032 2 0.001 1 0.281 687 0.000 015 0.281 645 -38.4 3.6 2 200 2 350 -0.97
      31 774 0.016 9 0.000 5 0.281 979 0.000 016 0.281 971 -28.0 -11.3 1 768 2 382 -0.98
      32 263 0.022 2 0.000 7 0.282 417 0.000 014 0.282 413 -12.6 -6.9 1 171 1 724 -0.98
      33 241 0.013 3 0.000 5 0.282 488 0.000 015 0.282 485 -10.1 -4.8 1 066 1 577 -0.98
      34 259 0.033 5 0.001 1 0.282 670 0.000 015 0.282 664 -3.6 1.9 827 1 164 -0.97
      35 241 0.035 5 0.001 4 0.282 512 0.000 015 0.282 505 -9.2 -4.1 1 058 1 533 -0.96
      38 454 0.028 8 0.000 9 0.282 603 0.000 018 0.282 595 -6.0 3.7 917 1 195 -0.97
      40 336 0.014 9 0.000 6 0.282 605 0.000 021 0.282 602 -5.9 1.4 905 1 255 -0.98
      42 418 0.015 5 0.000 5 0.282 542 0.000 020 0.282 537 -8.1 0.9 992 1 347 -0.98
      44 229 0.040 7 0.001 5 0.282 904 0.000 015 0.282 897 4.7 9.5 500 656 -0.95
      46 2048 0.015 0 0.000 5 0.281 310 0.000 016 0.281 289 -51.7 -6.7 2 675 3 062 -0.98
      48 432 0.045 0 0.001 5 0.282 556 0.000 014 0.282 544 -7.6 1.5 996 1 323 -0.96
      49 244 0.028 0 0.001 0 0.282 727 0.000 016 0.282 722 -1.6 3.6 744 1 043 -0.97
      50 855 0.035 0 0.001 2 0.282 239 0.000 016 0.282 220 -18.9 -0.6 1 435 1 777 -0.96
      51 1928 0.045 1 0.001 5 0.281 571 0.000 029 0.281 516 -42.5 -1.4 2 382 2 643 -0.95
      53 227 0.030 7 0.001 1 0.282 891 0.000 020 0.282 887 4.2 9.0 512 682 -0.97
      60 2 041 0.013 5 0.000 4 0.281 227 0.000 021 0.281 209 -54.7 -9.7 2 780 3 240 -0.99
      62 236 0.031 2 0.001 1 0.282 521 0.000 013 0.282 516 -8.9 -3.9 1 037 1 511 -0.97
      64 404 0.012 1 0.000 5 0.282 466 0.000 012 0.282 462 -10.8 -2.1 1 097 1 526 -0.98
      67 243 0.045 8 0.001 7 0.282 511 0.000 018 0.282 503 -9.2 -4.2 1 067 1 536 -0.95
      70 1 952 0.040 8 0.001 3 0.281 676 0.000 015 0.281 628 -38.8 3.1 2 225 2 384 -0.96
      71 416 0.014 5 0.000 6 0.282 680 0.000 016 0.282 675 -3.2 5.8 801 1 038 -0.98
      72 411 0.019 9 0.000 7 0.282 798 0.000 014 0.282 792 0.9 9.8 639 778 -0.98
      75 413 0.033 5 0.001 0 0.282 523 0.000 015 0.282 515 -8.8 0.0 1 031 1 400 -0.97
      78 428 0.069 1 0.002 2 0.282 472 0.000 015 0.282 455 -10.6 -1.8 1 137 1 525 -0.93
      80 458 0.020 2 0.000 8 0.282 498 0.000 015 0.282 492 -9.7 0.2 1 059 1 424 -0.98
      82 284 0.048 6 0.001 7 0.282 121 0.000 018 0.282 112 -23.0 -17.1 1 620 2 382 -0.95
      83 866 0.107 2 0.003 2 0.282 215 0.000 021 0.282 163 -19.7 -2.4 1 551 1 896 -0.90
      87 1 951 0.029 2 0.000 9 0.281 440 0.000 020 0.281 405 -47.1 -4.8 2 526 2 871 -0.97
      89 341 0.033 7 0.001 2 0.282 943 0.000 015 0.282 935 6.0 13.3 440 499 -0.97
      91 255 0.023 0 0.000 9 0.282 535 0.000 016 0.282 531 -8.4 -2.9 1 011 1 467 -0.97
      93 415 0.011 3 0.000 4 0.282 330 0.000 014 0.282 327 -15.6 -6.6 1 280 1 820 -0.99
      100 938 0.014 8 0.000 4 0.282 207 0.000 016 0.282 199 -20.0 0.5 1 451 1 770 -0.99
      下载: 导出CSV

      表  3  四川西部可尔因侏倭组变质沉积岩主量元素(%)及微量元素(×10-6)含量

      Table  3.   Major(%) and trace(×10-6) elelments data of Zhuwo Formation meta⁃sedimentary rocks in Ke'eryin area, western Sichuan

      样品编号 LW-80 LW-81 ZK1703-2 PD3650-2 PD3650-6
      SiO2 67.47 70.81 70.24 73.70 72.47
      TiO2 0.75 0.62 0.49 0.50 0.60
      Al2O3 15.85 14.76 10.69 11.06 13.23
      Fe2O3T 6.16 6.47 4.36 5.14 4.09
      MnO 0.08 0.08 0.10 0.11 0.05
      MgO 2.17 2.40 2.49 1.90 1.60
      CaO 0.51 0.60 7.24 2.90 0.86
      Na2O 2.18 1.21 0.23 1.53 2.37
      K2O 2.74 1.33 1.57 1.58 2.75
      P2O5 0.20 0.29 0.12 0.15 0.13
      LOI/H2O+ 1.00 0.70 1.94 0.88 1.31
      Total 99.11 99.26 99.46 99.46 99.45
      DF -2.89 -6.03 -2.99 -3.85 -2.25
      ICV 0.92 0.85 1.53 1.23 0.93
      Li 1 080 611 822 773 890
      B 2 640 2 010 22.6 20.5 230
      Rb 655 391 640 173 151
      Ba 478 207 220 375 437
      Th 11.1 11.1 9.2 9.82 12
      U 3.83 3.85 2.56 2.57 2.93
      Ta 7.6 10.6 1.07 0.739 1.21
      Nb 52.1 35.8 12.6 10.2 11.4
      Sr 158 96.3 192 361 159
      Zr 180 173 149 170 210
      Hf 4.98 5.13 3.84 4.48 5.68
      Y 28.4 25.7 22.7 24.9 23.8
      La 32.9 27.2 29.6 32.9 36.6
      Ce 64 53.7 54.8 67.6 68.4
      Pr 7.53 6.57 6.38 8.46 8.36
      Nd 29.2 25.7 24.3 32.6 30.3
      Sm 6.06 5.57 4.67 6.57 5.74
      Eu 1.27 0.982 0.921 1.25 1.24
      Gd 5.62 5.15 4.39 5.71 5.08
      Tb 0.866 0.805 0.7 0.876 0.781
      Dy 5.1 4.81 3.96 4.59 4.38
      Ho 0.961 0.907 0.753 0.876 0.812
      Er 2.77 2.53 2.23 2.56 2.46
      Tm 0.391 0.345 0.316 0.346 0.34
      Yb 2.57 2.27 2.08 2.38 2.36
      Lu 0.38 0.33 0.32 0.38 0.37
      REE 159.62 136.87 135.42 167.09 167.22
      δCe 0.96 0.95 0.93 0.97 0.92
      δEu 0.65 0.55 0.61 0.61 0.69
      (La/Sm)N 3.51 3.15 4.09 3.23 4.12
      (La/Yb)N 9.18 8.60 10.21 9.92 11.12
      (Sm/Nd)N 0.63 0.66 0.59 0.62 0.58
      (Gd/Yb)N 1.81 1.88 1.75 1.98 1.78
      LREE/HREE 7.55 6.98 8.18 8.43 9.09
      下载: 导出CSV

      表  4  川西可尔因地区花岗岩、伟晶岩锆石U-Pb年龄

      Table  4.   Zircon U-Pb ages of granites and pegmatites in Ke'eryinaera, western Sichuan

      编号 岩性 结晶年龄(Ma) > 结晶年龄(Ma) 数量(个) 来源
      LM107 白云母花岗岩 217±2.8 339~334 3 Fei et al.(2020)
      LM131 白云母花岗岩 214.9±1.0 383 1 费光春(未发表)
      LM122 二云母花岗岩 223.1±1.3 246~239 6
      LMH3 二云母花岗岩 219.2±2.3 254~232 4 Fei et al.(2020)
      1325 1
      LM111 斑状黑云母花岗岩 224.5±2.4 293~245 8 费光春(未发表)
      T07 黑云母二长花岗岩 217.0±2.8 242~231 7
      T03 花岗闪长岩 212.5±2.0 231、238 2
      LKH3 钠长石伟晶岩 202.8±4.9 231、890 2 Fei et al. (2020)
      DB19-08 微斜长石钠长石伟晶岩 210.5±3.4 258~247 5 费光春(未发表)
      424~417 6
      368、376、836 3
      下载: 导出CSV
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