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南祁连奥陶纪花岗岩锆石U-Pb年龄及地质意义

廖华 胡道功 张绪教 余文林 郭涛

廖华, 胡道功, 张绪教, 等, 2014. 南祁连奥陶纪花岗岩锆石U-Pb年龄及地质意义. 地质力学学报, 20 (3): 292-298.
引用本文: 廖华, 胡道功, 张绪教, 等, 2014. 南祁连奥陶纪花岗岩锆石U-Pb年龄及地质意义. 地质力学学报, 20 (3): 292-298.
LIAO Hua, HU Dao-gong, ZHANG Xu-jiao, et al., 2014. ZIRCON U-Pb AGE FOR GRANITE OF THE ORDOVICIAN FORMATION AND ITS TECTONIC SIGNIFICANCE IN THE SOUTHERN QILIAN. Journal of Geomechanics, 20 (3): 292-298.
Citation: LIAO Hua, HU Dao-gong, ZHANG Xu-jiao, et al., 2014. ZIRCON U-Pb AGE FOR GRANITE OF THE ORDOVICIAN FORMATION AND ITS TECTONIC SIGNIFICANCE IN THE SOUTHERN QILIAN. Journal of Geomechanics, 20 (3): 292-298.

南祁连奥陶纪花岗岩锆石U-Pb年龄及地质意义

基金项目: 

祁连山冻土区天然气水合物资源勘查项目 GZHL20120301

详细信息
    作者简介:

    廖华(1989-), 女, 硕士研究生, 地质工程专业。E-mail:hualiao0711@163.com

  • 中图分类号: P597

ZIRCON U-Pb AGE FOR GRANITE OF THE ORDOVICIAN FORMATION AND ITS TECTONIC SIGNIFICANCE IN THE SOUTHERN QILIAN

  • 摘要: 加里东运动是祁连山早古生代以来较为重要的构造变形期, 其中以发生在晚志留世与早泥盆世之间的构造活动最为强烈。在加里东早期开始有花岗岩类侵入体涌现, 到加里东晚期时, 南祁连出现较发育的中-酸性侵入岩, 并尤以南祁连西段较为集中, 这些岩体见于哈拉湖周围以及阳康、织合玛等地。应用激光烧蚀多接收器电感耦合等离子体质谱仪(LA-MC-ICPMS)方法, 对南祁连扫迪南部侵位于志留系巴龙贡葛尔组(Sb)中的花岗岩体进行了精确的锆石U-Pb定年研究, 结果表明, 花岗岩中锆石206Pb/238U年龄平均值为461.5±1.6 Ma, 指示扫迪南花岗岩体的地质时代属中奥陶世晚期, 故巴龙贡葛尔组(Sb)时代应该早于中奥陶世。

     

  • 图  1  祁连山地质构造略图[9]

    Figure  1.  Tectonic map of Qilian Mountain

    图  2  德令哈北部地区地质简图

    1—第四系;2—第三纪白杨河组;3—早白垩犬牙沟组;4—中晚侏罗世采石岭组—红水沟组;5—晚三叠世默勒群;6—早—中三叠世郡子河群;7—二叠世巴音河群;8—二叠世—石炭世中吾农山群;9—志留系巴龙贡葛尔组;10—中—晚奥陶世盐池湾组;11—早奥陶世吾力沟组;12—古元古代金水口岩群;13—花岗闪长岩;14—二长花岗岩;15—钾长花岗岩;16—角度不整合;17—断裂;18—样品号及采样点位置

    Figure  2.  A geological map of north Delingha

    图  3  祁连山扫迪南花岗岩的锆石阴极发光图像

    Figure  3.  CL images of zircons from granite rocks in south of Saodi Formation in Qilianshan

    图  4  花岗岩锆石U-Pb年龄谐和图和均值图

    Figure  4.  U-Pb concordia diagram of zircons from granite rocks from south of Saodi Formation in Qilianshan

    表  1  花岗岩锆石LA-MC-ICPMS U-Pb同位素年龄测定结果

    Table  1.   LA-MC-ICPMS U-Pb isotopic age data for zircons from granite rocks

    测点 元素含量/(μg·g-1) Th/U 同位素原子比率 表面年龄/Ma
    Pb U 206Pb/238U 1 σ 207Pb/235U 1 σ 207Pb/206Pb 1 σ 206Pb/238U 1 σ
    1.1 42 561 0.38 0.0744 0.0008 0.5715 0.0093 0.0557 0.0009 463 5
    1.2 44 561 0.47 0.0746 0.0006 0.5932 0.0115 0.0577 0.0010 464 4
    1.3 31 400 0.43 0.0740 0.0005 0.5806 0.0110 0.0568 0.0010 460 3
    1.4 44 579 0.33 0.0743 0.0005 0.5867 0.0085 0.0573 0.0008 462 3
    1.5 45 583 0.30 0.0754 0.0005 0.5865 0.0086 0.0565 0.0008 468 3
    1.6 55 660 0.28 0.0806 0.0008 0.6467 0.0091 0.0582 0.0008 500 5
    1.7 54 690 0.35 0.0741 0.0004 0.5826 0.0079 0.0570 0.0008 461 2
    1.8 76 1021 0.18 0.0744 0.0004 0.5812 0.0075 0.0566 0.0007 463 3
    1.9 64 836 0.28 0.0743 0.0004 0.5862 0.0083 0.0572 0.0008 462 2
    1.11 32 419 0.32 0.0738 0.0004 0.5734 0.0120 0.0564 0.0012 459 2
    1.12 36 473 0.25 0.0747 0.0004 0.5982 0.0099 0.0580 0.0009 465 2
    1.13 29 380 0.35 0.0733 0.0004 0.5670 0.0112 0.0561 0.0011 456 2
    1.14 36 467 0.46 0.0737 0.0004 0.5777 0.0092 0.0568 0.0009 459 2
    1.15 37 489 0.30 0.0744 0.0003 0.5894 0.0100 0.0574 0.0010 463 2
    1.16 35 471 0.49 0.0703 0.0003 0.5428 0.0094 0.0560 0.0009 438 2
    1.17 55 736 0.48 0.0719 0.0003 0.5429 0.0072 0.0548 0.0007 447 2
    1.18 59 784 0.35 0.0747 0.0006 0.5722 0.0084 0.0556 0.0008 464 4
    1.19 78 1023 0.36 0.0741 0.0005 0.5906 0.0081 0.0578 0.0008 461 3
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  • [1] 冯益民, 何世平.祁连山大地构造与造山作用[M].北京:地质出版社.1996.

    FENG Yi-min, HE Shi-ping. Geotectonics and orogenesis in Qilian Mountains[M]. Beijing: Geological Publishing House, 1996.
    [2] 许志琴, 杨经绥, 姜枚, 等.大陆俯冲作用及青藏高原周缘造山带的崛起[J].地学前缘, 1999, 6(3): 139~151. http://www.cnki.com.cn/Article/CJFDTOTAL-DXQY199903018.htm

    XU Zhi-qin, YANG Jing-sui, JIANG Mei, et al. Continental subduction and uplifting of the orogenic belts at the margin of the Qinghai-Tibet Plateau[J]. Earth Science Frontiers, 1999, 6(3): 139~151. http://www.cnki.com.cn/Article/CJFDTOTAL-DXQY199903018.htm
    [3] 樊光明, 雷东宁.祁连山东南段加里东造山期构造变形年代的精确限定及其意义[J].地球科学:中国地质大学学报, 2007, 32(1): 39~44. http://www.cnki.com.cn/Article/CJFDTOTAL-DQKX200701004.htm

    FAN Guang-ming, LEI Dong-ning. Precise timing and significance of Caledonian structural deformation chronology in southeast Qilian[J]. Earth Science: Journal of China University of Geosciences, 2007, 32(1): 39~44. http://www.cnki.com.cn/Article/CJFDTOTAL-DQKX200701004.htm
    [4] 许志琴, 杨经绥, 吴才来, 等.柴达木北缘超高压变质带形成与折返的时限及机制[J].地质学报, 2003, 77(2): 163~176. http://www.cnki.com.cn/Article/CJFDTOTAL-DZXE200302006.htm

    XU Zhi-qin, YANG Jing-sui, WU Cai-lai, et al. Timing and machanism of formation and exhumation of the Qaidam Ultra-Pressure Metamorphic Belt[J]. Acta Geologica Sinica, 2003, 77(2): 163~176. http://www.cnki.com.cn/Article/CJFDTOTAL-DZXE200302006.htm
    [5] 张博文. 青海南祁连造山带内生金属矿床成矿作用研究[D]. 长春: 吉林大学, 2010.

    ZHANG Bo-wen. Study on metalliferous deposits mineralization in southern Qilian Orogenic Belt, Qinghai Province[D]. Changchun: Jilin University, 2010.
    [6] 吴才来, 姚尚志, 杨经绥, 等.北祁连洋早古生代双向俯冲的花岗岩证据[J].中国地质, 2006, 33(6): 1197~1208. http://www.cnki.com.cn/Article/CJFDTOTAL-DIZI200606003.htm

    WU Cai-lai, YAO Shang-zhi, YANG Jing-sui, et al. Double subduction of the Early Paleozoic North Qilian oceanic plate: Evidence from granites in the central segment of North Qilian, NW China[J]. Geology in China, 2006, 33(6): 1197~1208. http://www.cnki.com.cn/Article/CJFDTOTAL-DIZI200606003.htm
    [7] 吴才来, 郜源红, 吴锁平, 等.柴北缘西段花岗岩锆石SHRIMP U-Pb定年及其岩石地球化学特征[J].中国科学D辑:地球科学, 2008, 38(8): 930~949. http://www.cnki.com.cn/Article/CJFDTOTAL-JDXK200808002.htm

    WU Cai-lai, GAO Yuan-hong, WU Suo-ping, et al. Zircon SHRIMP U-Pb dating of granite and its lithogeochemical characteristics in western segment of north margin of Qaidam Basin[J]. Science in China Series D: Earth Science, 2008, 38(8): 930~949. http://www.cnki.com.cn/Article/CJFDTOTAL-JDXK200808002.htm
    [8] 吴才来, 徐学义, 高前明, 等.北祁连早古生代花岗质岩浆作用及构造演化[J].岩石学报, 2010, 26(4): 1027~1044. http://www.cnki.com.cn/Article/CJFDTOTAL-YSXB201004004.htm

    WU Cai-lai, XU Xue-yi, GAO Qian-ming, et al. Early Palaezoic grranitoid magmatism and tectonic evolution in North Qilian, NW China[J]. Acta Petrologica Sinica 2010, 26(4): 1027~1044. http://www.cnki.com.cn/Article/CJFDTOTAL-YSXB201004004.htm
    [9] 许志琴, 杨经绥, 李海兵, 等.造山的高原——青藏高原的地体拼合、碰撞造山及隆升机制[M].北京:地质出版社.2007.

    XU Zhi-qin, YANG Jing-sui, LI Hai-bing, et al. An orogenic plateau: Terrain tectonics, collisional orogenesis, and rising mechanisms of the Qinghai-Tibet Plateau[M]. Beijing: Geological Publishing House, 2007.
    [10] 何世平, 李荣社, 王超, 等.南祁连东段化隆岩群形成时代的进一步限定[J].岩石矿物学杂志, 2011, 30(1): 34~44. http://www.cnki.com.cn/Article/CJFDTOTAL-YSKW201101006.htm

    HE Shi-ping, LI Rong-she, WANG Chao, et al. The further age constraint of Hualong Rock Group in the eastern segment of South Qilian Mountains[J]. Acta Petrologica et Mineralogica, 2011, 30(1): 34~44. http://www.cnki.com.cn/Article/CJFDTOTAL-YSKW201101006.htm
    [11] 青海省地质局. 中华人民共和国区域地质调查报告——快日玛乡幅(1: 20万)[R]. 西宁: 青海省地质局, 1976.

    Qinghai Geology Bureau. Regional geological surveying report of the People's Republic of China: Kuairima area (1:200000)[R]. Xining: Qinghai Geology Bureau, 1976.
    [12] 青海省地质局. 中华人民共和国区域地质调查报告——德令哈幅(1: 20万)[R]. 西宁: 青海省地质局, 1978.

    Qinghai Geology Bureau. Regional geological surveying report of the People's Republic of China: Delingha area (1:200000)[R]. Xining: Qinghai Geology Bureau, 1978.
    [13] 黄瑞华.祁连山地区大地构造演化及其性质特征[J].大地构造与成矿学, 1996, 20(2): 95~104. http://www.cnki.com.cn/Article/CJFDTOTAL-DGYK602.000.htm

    HUANG Rui-hua. Geotectonic evolution and its characteristics in Qilianshan Region[J]. Geotectonical et Metallogenia, 1996, 20(2): 95~104. http://www.cnki.com.cn/Article/CJFDTOTAL-DGYK602.000.htm
    [14] 李怀坤, 耿建珍, 郝爽, 等.用激光烧蚀多接收器等离子体质谱仪(LA-MC-ICPMS)测定锆石U-Pb同位素年龄的研究[J].矿物学报, 2009, 29(z1): 600~601. doi: 10.3321/j.issn:1000-4734.2009.z1.311

    LI Huai-kun, GENG Jian-zhen, HAO Shuang, et al. Study on zircon U-Pb isotopic dating by LA-MC-ICPMS[J]. Acta Mineralogica Sinica, 2009, 29(z1): 600~601. doi: 10.3321/j.issn:1000-4734.2009.z1.311
    [15] Gao Shan, Liu Xiao-ming, Yuan Hong-lin. Analysis of forty_two major and trace elements of USGS and NIST SRM Glasses by LA-ICP-MS[J]. Geostand News, 2002, 22:181~19.
    [16] 甘肃省地质矿产局.青海省岩石地层[M].武汉:中国地质大学出版社, 1997.

    Bureau of Geology and Mineral Resources of Gansu Province. Litho strata in Qinghai Province[M]. Wuhan: China University of Geosciences Press, 1997.
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  • 收稿日期:  2014-04-11
  • 刊出日期:  2014-09-28

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