晋陕交界涑水杂岩LA-ICP-MS锆石U-Pb年龄和Hf同位素组成及其地质意义

王建其, 刘祥, 第五春荣. 晋陕交界涑水杂岩LA-ICP-MS锆石U-Pb年龄和Hf同位素组成及其地质意义[J]. 地质通报, 2017, 36(2-3): 392-401.
引用本文: 王建其, 刘祥, 第五春荣. 晋陕交界涑水杂岩LA-ICP-MS锆石U-Pb年龄和Hf同位素组成及其地质意义[J]. 地质通报, 2017, 36(2-3): 392-401.
WANG Jianqi, LIU Xiang, DIWU Chunrong. LA-ICP-MS zircon U-Pb dating and Hf isotopic compositions of rocks from the Sushui complex in Shanxi-Shaanxi border area and their geological significance[J]. Geological Bulletin of China, 2017, 36(2-3): 392-401.
Citation: WANG Jianqi, LIU Xiang, DIWU Chunrong. LA-ICP-MS zircon U-Pb dating and Hf isotopic compositions of rocks from the Sushui complex in Shanxi-Shaanxi border area and their geological significance[J]. Geological Bulletin of China, 2017, 36(2-3): 392-401.

晋陕交界涑水杂岩LA-ICP-MS锆石U-Pb年龄和Hf同位素组成及其地质意义

  • 基金项目:
    国家自然科学基金项目《国家创新研究群体:大陆构造与动力学》(批准号:41421002)、《华北克拉通南缘早前寒武纪构造-热事件及其地质意义》(批准号:41672188)、《华北克拉通南缘豫陕地区古元古代构造-热事件研究》(批准号:41272004)
详细信息
    作者简介: 王建其 (1960-), 男, 工程师, 从事地球化学分析和研究。E-mail:wangjianqi@nwu.edu.cn
  • 中图分类号: P597+.3

LA-ICP-MS zircon U-Pb dating and Hf isotopic compositions of rocks from the Sushui complex in Shanxi-Shaanxi border area and their geological significance

  • 涑水杂岩作为华北克拉通南部早前寒武纪变质基底杂岩的重要组成部分,以中条山地区出露最好且研究程度最高。在晋陕交界处的韩城和河津地区也有零星的古老变质基底杂岩出露,通常认为是中条山地区涑水杂岩的西延。用LA-ICP-MS锆石U-Pb方法测得研究区内的基底岩石角闪斜长片麻岩、透辉斜长片麻岩和二长花岗片麻岩原岩的形成年龄分别为2260±28Ma、2053±34Ma和2098±27Ma,表明晋陕交界处涑水杂岩的形成年龄明显小于中条山地区的涑水杂岩,其形成时代主要应为古元古代早期,而非太古宙。锆石Hf同位素显示,所分析的锆石多数具有低εHf(t) 值,最低可达-6,其二阶段模式年龄为2630~2933Ma,表明这些形成于古元古代的岩石为太古宙岩石再循环的产物,暗示在晋陕交界处可能存在太古宙的古老地壳物质,同时也支持华北克拉通南部太古宙地块划分的推论。

  • 加载中
  • 图 1  华北克拉通前寒武纪地质简图[4](a) 和中条山地区地质简图 (b)[5]

    Figure 1. 

    图 2  晋陕交界区地质简图

    Figure 2. 

    图 3  晋陕交界涑水杂岩的锆石U-Pb年龄和Hf同位素组成

    Figure 3. 

    图 图版Ⅰ  a.河津市西磑口样品;b.韩城市阳山庄角闪斜长片麻岩;c.角闪斜长片麻岩;d.透辉斜长片麻岩;e.二长花片麻岩.Pl—斜长石;Mic—微斜长石;Di—透辉石;Amp—角闪石;Qz—石英;Mt—磁铁矿

    表 1  晋陕交界涑水杂岩锆石U-Th-Pb年龄

    Table 1.  Zircon U-Th-Pb dating of the Sushui complex in Shanxi-Shaanxi border area

    样品号含量/10-6Th/U同位素比值年龄/Ma
    PbThU207Pb/206Pb207Pb/235U206Pb/238U207Pb/206Pb207Pb/235U206Pb/238U
    角闪斜长片麻岩 (12YSZ03)
    12YSZ03-011332332990.780.13970.00457.4050.1350.38470.0063222354216216209829
    12YSZ03-021282103040.690.14160.00457.0950.1290.36370.0060224754212316200028
    12YSZ03-03861321950.680.14350.00477.5060.1420.37970.0063226955217417207529
    12YSZ03-041473263400.960.14210.00457.3110.1280.37320.0061225354215016204528
    12YSZ03-0586931880.500.14390.00477.7600.1480.39130.0065227555220417212930
    12YSZ03-06971252050.610.14330.00468.0220.1510.40620.0067226855223417219731
    12YSZ03-071362343140.750.14030.00457.2090.1320.37290.0061223154213816204329
    12YSZ03-08951512060.740.14020.00467.6950.1500.39840.0067222956219618216231
    12YSZ03-091142022610.770.13950.00457.2320.1350.37630.0062222055214117205929
    12YSZ03-101102312530.910.14010.00457.2640.1340.37610.0062222955214416205829
    12YSZ03-1183811860.440.14140.00467.5180.1440.38590.0064224455217517210430
    12YSZ03-121402493290.760.13950.00457.0870.1300.36880.0060222155212316202428
    12YSZ03-13921372130.640.14030.00467.1690.1380.37070.0062223156213317203329
    12YSZ03-14991252020.620.14390.00478.3710.1620.42210.0070227555227218227032
    12YSZ03-1592731970.370.13920.00537.7460.2110.40380.0076221765220225218735
    12YSZ03-161312272860.800.14030.00457.6580.1410.39600.0065223155219217215130
    12YSZ03-171392653060.870.14280.00487.7250.1610.39250.0067226257220019213431
    12YSZ03-181071182380.500.14040.00467.5390.1420.38950.0064223355217817212130
    12YSZ03-191312212850.780.14030.00497.6650.1720.39640.0069223159219320215232
    12YSZ03-201111332570.520.14220.00467.2950.1330.37230.0061225454214816204029
    透辉斜长片麻岩 (12YSZ031)
    12YSZ031-011042594320.600.12720.00493.6520.1030.20830.0039206066156122122021
    12YSZ031-02954034080.990.13300.00503.7550.1000.20470.0038213864158321120020
    12YSZ031-03942703730.720.13100.00443.9330.0860.21780.0038211158162018127020
    12YSZ031-04952483790.650.13350.00494.0070.1040.21760.0040214563163621126921
    12YSZ031-051044714231.110.13440.00474.0120.0930.21630.0038215659163719126320
    12YSZ031-06972253760.600.13260.00564.0670.1340.22250.0045213372164827129524
    12YSZ031-07963943641.080.13160.00514.1600.1190.22930.0044211966166623133123
    12YSZ031-081062663710.720.12910.00514.3490.1300.24440.0047208668170325141024
    12YSZ031-09982263580.630.13210.00424.3720.0840.23990.0041212655170716138621
    12YSZ031-1054781870.410.12860.00714.4880.2140.25300.0063207994172940145432
    12YSZ031-11112793860.200.13000.00414.5880.0870.25580.0043209855174716146822
    12YSZ031-12982523280.770.12780.00434.6020.1000.26120.0045206758175018149623
    12YSZ031-13821542650.580.13110.00434.8810.0980.27010.0046211256179917154123
    12YSZ031-14852022570.790.12660.00445.0110.1180.28700.0051205260182120162725
    12YSZ031-151032072940.700.12830.00465.3360.1320.30160.0055207562187521169927
    12YSZ031-1689702510.280.12690.00415.3930.1050.30830.0052205556188417173226
    12YSZ031-17761072000.540.13060.00476.0700.1540.33670.0062210762198622187130
    下载: 导出CSV

    表 2  晋陕交界涑水杂岩锆石Hf同位素组成

    Table 2.  Zircon Hf isotopic compositions of the Sushui complex in Shanxi-Shaanxi border area

    样品号年龄/Ma176Yb/177Hf176Lu/177Hf(176Hf/177Hf)0(176Hf/177Hf)iεHf (t)TDM1TDM2(CC)TDM2(CC_2014)fLu/Hf
    角闪斜长片麻岩(12YSZ03)
    12YSZ03-01 2260 0.043486 0.001403 0.281450 0.281389 0.000010 1.9 0.3 2545 2709 2648 -0.96
    12YSZ03-02 2260 0.026787 0.000923 0.281402 0.281362 0.000013 0.9 0.5 2578 2768 2700 -0.97
    12YSZ03-03 2260 0.070682 0.002234 0.281411 0.281315 0.000013 -0.8 0.5 2657 2871 2789 -0.93
    12YSZ03-05 2260 0.021740 0.000804 0.281432 0.281398 0.000019 2.2 0.7 2529 2690 2632 -0.98
    12YSZ03-06 2260 0.046220 0.001520 0.281452 0.281387 0.000015 1.8 0.5 2549 2714 2654 -0.95
    12YSZ03-07 2260 0.019108 0.000645 0.281372 0.281344 0.000010 0.2 0.4 2600 2807 2734 -0.98
    12YSZ03-08 2260 0.054515 0.001778 0.281421 0.281344 0.000014 0.3 0.5 2611 2807 2734 -0.95
    12YSZ03-09 2260 0.039883 0.001260 0.281414 0.281360 0.000014 0.8 0.5 2585 2773 2704 -0.96
    12YSZ03-11 2260 0.103130 0.003122 0.281435 0.281300 0.000016 -1.3 0.6 2688 2903 2816 -0.91
    12YSZ03-12 2260 0.015796 0.000542 0.281387 0.281363 0.000017 0.9 0.6 2574 2765 2697 -0.98
    12YSZ03-14 2260 0.046732 0.001466 0.281372 0.281309 0.000021 -1.0 0.8 2657 2884 2800 -0.96
    12YSZ03-15 2260 0.051977 0.001629 0.281432 0.281362 0.000012 0.9 0.4 2585 2768 2700 -0.95
    12YSZ03-16 2260 0.050081 0.001567 0.281417 0.281349 0.000013 0.4 0.5 2601 2795 2723 -0.95
    12YSZ03-17 2260 0.042134 0.001347 0.281401 0.281343 0.000016 0.2 0.6 2608 2809 2735 -0.96
    12YSZ03-18 2260 0.051399 0.001622 0.281402 0.281332 0.000015 -0.2 0.5 2626 2833 2756 -0.95
    12YSZ03-20 2260 0.038482 0.001219 0.281425 0.281372 0.000011 1.2 0.4 2567 2746 2681 -0.96
    透辉斜长片麻岩 (12YSZ031)
    12YSZ031-01 2053 0.024452 0.000861 0.281505 0.281472 0.000013 0.0 0.5 2433 2661 2579 -0.97
    12YSZ031-02 2053 0.040618 0.001427 0.281492 0.281436 0.000021 -1.3 0.7 2488 2738 2646 -0.96
    12YSZ031-04 2053 0.027679 0.000941 0.281520 0.281483 0.000014 0.4 0.5 2418 2636 2558 -0.97
    12YSZ031-05 2053 0.032882 0.001127 0.281486 0.281442 0.000018 -1.1 0.6 2477 2725 2635 -0.97
    12YSZ031-07 2053 0.033591 0.001111 0.281519 0.281475 0.000014 0.1 0.5 2431 2653 2572 -0.97
    12YSZ031-08 2053 0.033288 0.001114 0.281475 0.281432 0.000023 -1.4 0.8 2490 2747 2654 -0.97
    12YSZ031-09 2053 0.034142 0.001181 0.281528 0.281482 0.000026 0.4 0.9 2422 2638 2559 -0.96
    12YSZ031-10 2053 0.032118 0.001058 0.281483 0.281442 0.000019 -1.1 0.7 2476 2725 2635 -0.97
    12YSZ031-11 2053 0.023981 0.000759 0.281487 0.281457 0.000027 -0.5 0.9 2452 2692 2606 -0.98
    12YSZ031-12 2053 0.059430 0.001923 0.281543 0.281468 0.000018 -0.1 0.6 2449 2668 2586 -0.94
    12YSZ031-13 2053 0.050933 0.001590 0.281517 0.281455 0.000016 -0.6 0.6 2464 2697 2611 -0.95
    12YSZ031-14 2053 0.015522 0.000548 0.281519 0.281498 0.000010 0.9 0.4 2395 2603 2529 -0.98
    12YSZ031-16 2053 0.047364 0.001547 0.281555 0.281494 0.000011 0.8 0.4 2409 2611 2536 -0.95
    12YSZ031-17 2053 0.014949 0.000507 0.281501 0.281481 0.000008 0.3 0.3 2417 2640 2561 -0.98
    二长花岗片麻岩 (12XWK03)
    12XWK03-01 2098 0.041136 0.001278 0.281353 0.281302 0.000020 -5.0 0.7 2669 3000 2879 -0.96
    12XWK03-02 2098 0.072607 0.002298 0.281365 0.281274 0.000051 -6.0 1.8 2726 3063 2933 -0.93
    12XWK03-03 2098 0.059392 0.001697 0.281394 0.281326 0.000025 -4.1 0.9 2642 2948 2834 -0.95
    12XWK03-04 2098 0.062262 0.001884 0.281386 0.281311 0.000020 -4.7 0.7 2667 2982 2864 -0.94
    12XWK03-06 2098 0.048828 0.001484 0.281346 0.281287 0.000019 -5.5 0.7 2693 3033 2908 -0.96
    12XWK03-07 2098 0.043049 0.001330 0.281395 0.281342 0.000019 -3.6 0.7 2615 2915 2805 -0.96
    12XWK03-08 2098 0.051850 0.001573 0.281423 0.281360 0.000017 -2.9 0.6 2593 2874 2770 -0.95
    12XWK03-09 2098 0.065822 0.001815 0.281376 0.281303 0.000024 -5.0 0.9 2676 2999 2878 -0.95
    12XWK03-11 2098 0.022580 0.000708 0.281324 0.281296 0.000017 -5.2 0.6 2669 3015 2892 -0.98
    12XWK03-12 2098 0.037852 0.001223 0.281403 0.281354 0.000014 -3.2 0.5 2597 2888 2782 -0.96
    下载: 导出CSV
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出版历程
收稿日期:  2016-11-18
修回日期:  2017-01-17
刊出日期:  2017-03-25

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