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青海祁漫塔格地区牛苦头矿床和卡而却卡矿床B区花岗质岩石LA-ICP-MS锆石U-Pb年龄——对泥盆纪成岩成矿作用的指示

姚磊, 吕志成, 赵财胜, 庞振山, 于晓飞, 祝新友, 李永胜, 刘鹏, 李顺庭, 张明超

姚磊, 吕志成, 赵财胜, 庞振山, 于晓飞, 祝新友, 李永胜, 刘鹏, 李顺庭, 张明超. 2016: 青海祁漫塔格地区牛苦头矿床和卡而却卡矿床B区花岗质岩石LA-ICP-MS锆石U-Pb年龄——对泥盆纪成岩成矿作用的指示. 地质通报, 35(7): 1158-1169.
引用本文: 姚磊, 吕志成, 赵财胜, 庞振山, 于晓飞, 祝新友, 李永胜, 刘鹏, 李顺庭, 张明超. 2016: 青海祁漫塔格地区牛苦头矿床和卡而却卡矿床B区花岗质岩石LA-ICP-MS锆石U-Pb年龄——对泥盆纪成岩成矿作用的指示. 地质通报, 35(7): 1158-1169.
YAO Lei, LÜ Zhicheng, ZHAO Caisheng, PANG Zhenshan, YU Xiaofei, ZHU Xinyou, LI Yongsheng, LIU Peng, LI Shunting, ZHANG Mingchao. 2016: Geochronological study of granit-oids from the Niukutou and B section of the Kaerqueka deposits, Qimantag area, Qinghai Province:Implications for Devoni-an magmatism and mineralization. Geological Bulletin of China, 35(7): 1158-1169.
Citation: YAO Lei, LÜ Zhicheng, ZHAO Caisheng, PANG Zhenshan, YU Xiaofei, ZHU Xinyou, LI Yongsheng, LIU Peng, LI Shunting, ZHANG Mingchao. 2016: Geochronological study of granit-oids from the Niukutou and B section of the Kaerqueka deposits, Qimantag area, Qinghai Province:Implications for Devoni-an magmatism and mineralization. Geological Bulletin of China, 35(7): 1158-1169.

青海祁漫塔格地区牛苦头矿床和卡而却卡矿床B区花岗质岩石LA-ICP-MS锆石U-Pb年龄——对泥盆纪成岩成矿作用的指示

基金项目: 

国土资源公益性行业科研专项 201411024

中国地质调查局项目 1212011220737

中国地质调查局项目 12120113090000

详细信息
    作者简介:

    姚磊(1986-), 男, 博士, 工程师, 从事矿床学方面的研究。E-mail:lemmon20054255@aliyun.com

    通讯作者:

    吕志成(1966-), 男, 博士, 研究员, 从事矿床学及地球化学方面的研究。E-mail:zhichenglv@163.com

  • 中图分类号: P534.44;P597+.3

Geochronological study of granit-oids from the Niukutou and B section of the Kaerqueka deposits, Qimantag area, Qinghai Province:Implications for Devoni-an magmatism and mineralization

  • 摘要:

    牛苦头矿床和卡而却卡矿床是青海祁漫塔格地区重要的多金属矿床。利用LA-ICP-MS锆石U-Pb法测得牛苦头矿床花岗闪长岩成岩年龄为394.0±1.3Ma,卡而却卡矿床B区黑云母二长花岗岩的成岩年龄为406.4±4.2Ma。这些年龄与区内野马泉、乌兰乌珠尔及夏日哈木矿床成矿岩体的形成时代范围基本一致,说明青海祁漫塔格地区早、中泥盆世可能发生了大规模的岩浆作用和与之有关的成矿作用。结合区域地质特征和已发表的地质年代学及岩石地球化学数据可知,青海祁漫塔格地区早、中泥盆世处于后碰撞伸展的构造背景,暗示早、中泥盆世可能是青海祁漫塔格地区又一个重要的多金属成矿期。

    Abstract:

    The Niukutou and the Kaerqueka deposits are economically important in the Qimantag area of Qinghai Province (QA-QP). In this paper, the authors present new LA-ICP-MS zircon U-Pb ages for granitoids from these two deposits, which show that the emplacement ages of the Niukutou granodiorite and B section of the Kaerqueka biotite monzogranite are 394.0±1.3Ma and 406.4±4.2Ma, respectively. These ages are consistent with those of granitic intrusions associated with the Yemaquan, Wulanwuzhuer and Xiarihamu deposits, indicating that Early and Middle Devonian is an important period for magmatism and mineralization of the QAQP. Combined with previously published data and geological features, the authors hold that Early and Middle Devonian magma-tism and related polymetallic mineralization occurred in a post-collision tectonic setting, implying that Early and Middle Devonian might have been another significantly metallogenic period for the QAQP.

  • 致谢: 成文过程中,得到中国地质大学(北京)杨永强教授和中国地质科学院矿产资源研究所谢桂青研究员的指导和帮助;实验过程中,得到中国地质科学院成矿作用与资源评价重点实验室侯可军、郭春丽副研究员和王倩助理研究员的热情帮助;野外工作期间,得到李晓雄、孔明、巩小栋等同志的协助;审稿专家对论文提出了许多宝贵的意见和建议,在此一并致以衷心的感谢。
  • 图  1   青海祁漫塔格地区地质简图(据参考文献修改)

    Figure  1.   Geological map of the Qimantag area in Qinghai Province

    图  2   牛苦头矿床及外围地质简图(据参考文献修改)

    Figure  2.   Geological map of the Niukutou deposit

    图  3   牛苦头矿床M1异常区16号勘探线剖面(据参考文献修改)

    Figure  3.   Geological section along No. 16 exploration line in the No. M1 magnetic anomalous area of the Niukutou deposit

    图  4   卡而却卡矿床地质简图(据参考文献[19, 23])

    Figure  4.   Simplified geological map of the Kaerqueka deposit

    图  5   牛苦头矿床花岗闪长岩(a、b)和卡而却卡矿床B区黑云母二长花岗岩(c、d)的锆石阴极发光图像和锆石U-Pb谐和图

    Figure  5.   Cathodoluminescence images of zircons and zircon U-Pb concordia diagrams of the Niukutou granodiorite (a, b) and B section of the Kaerqueka biotite monzogranite (c, d)

    图  6   花岗闪长岩和黑云母二长花岗岩的成因类型判别图解(a,底图据参考文献[44])和Hf-Rb/30-Ta×30图解(b,底图据参考文献[41])

    1—卡而却卡矿床B区黑云母二长花岗岩;2—牛苦头花岗闪长岩;A—A型花岗岩;I&S—I型和S型花岗岩

    Figure  6.   Petrogenetic discrimination (a) and Hf-Rb/30-Ta×30 (b) diagrams for granitic rocks from the Niukutou and B section of the Kaerqueka deposit

    表  1   牛苦头矿床花岗闪长岩(NS-1)和卡而却卡矿床B区黑云母二长花岗岩(KE-30)LA-ICP-MS锆石U-Th-Pb数据

    Table  1   LA-ICP-MS zircon U-Th-Pb data of the Niukutou granodiorite and the Kaerqueka biotite monzogranite

    点号含量/10-6Th/U同位素比值年龄/Ma
    PbThU207Pb/206Pb207Pb/235U206Pb/238U207Pb/206Pb207Pb/235U206Pb/238U
    NS-1
    1131221890.60.05370.00280.46760.0240.06340.0011367119390173967
    2171932450.80.05370.00200.46380.0180.06250.000936753387123915
    311841620.50.05520.00300.47710.0250.06280.0011420153396173937
    4211743000.60.05270.00230.46320.0200.06360.00132298387143986
    5191502780.50.05840.00230.5040.0200.06270.001254685414133927
    6191882670.70.05350.00210.46940.0190.06350.001035089391133976
    7221623310.50.05580.00260.48370.0210.06320.001444399401153958
    8181282640.50.0510.00220.44340.0210.06250.0010239103373153916
    9161402340.60.05230.00260.45090.0220.06290.0011298111378153937
    10151342190.60.05470.00270.47880.0230.06360.0011467111397163977
    1111741630.50.05610.00310.47640.0260.06270.0013458124396183928
    128631160.50.05910.00420.51620.0370.0630.00175721544232539411
    13181742480.70.05490.00220.47540.0190.06310.000940689395133946
    149941220.80.0550.00330.4770.0280.0630.0009413132396193946
    15192202610.80.05720.00210.49710.0180.06310.000749888410133944
    162836336210.05670.00210.49410.0180.06330.000848082408123965
    17131551740.90.05510.00320.47390.0260.06330.0009417132394183965
    18212032910.70.05620.00240.48690.0220.06260.000745894403153924
    1911951520.60.05540.00280.4730.0240.06250.0010428115393173916
    20322544510.60.05840.00230.5060.0200.06330.001054685416133966
    KE-30
    1542547150.40.05050.00180.44420.0180.06420.001221783373134017
    2251383350.40.05420.00530.47010.0430.06410.00203892223913040112
    3553477490.50.05940.00270.52260.0310.06290.001258998427203937
    4462666190.40.05270.00170.46880.0160.06510.001331776390114068
    5684199090.50.05780.00190.51730.0170.06560.001452068423124098
    6351514870.30.05280.00220.47370.0190.06550.001232094394134097
    78757212710.50.05360.00140.48270.0160.06540.0016354574001140810
    8603548470.40.05370.00150.48320.0150.06510.001236169400104077
    9643079110.30.05380.00160.49220.0150.06640.001336566406104158
    10381965520.40.0510.00180.46340.0160.06580.001024379387114116
    11333474830.70.05240.00330.44190.0220.06450.00443021433721540327
    12412545950.40.04920.00300.44190.0260.06530.0016154-533721840810
    13473857920.50.05880.00210.53370.0290.06460.0021561764341940313
    147845711290.40.05280.00180.48010.0160.06560.001432078398114108
    1511369816500.40.05130.00170.4610.0180.06490.0021254783851240612
    16261633730.40.05820.00210.52580.0210.06550.001560080429144099
    下载: 导出CSV

    表  2   青海祁漫塔格地区泥盆纪岩体成因类型及成岩年代

    Table  2   Geochronological and petrogenetic data of the Devonian intrusions within the QAQP

    位置岩性成因类型方法矿物年龄/Ma参考文献
    喀雅克登塔格辉长岩-SHRIMP锆石403±7[14]
    二长花岗岩-SHRIMP锆石394±13
    辉长岩-LA-ICP-MS锆石380±2[27]
    花岗闪长岩-LA-ICP-MS锆石381土1[28]
    拉陵灶火二长花岗岩ALA-ICP-MS锆石396±2[29]
    乌兰乌珠尔正长花岗岩ALA-ICP-MS锆石锆石389±4[26]
    花岗斑岩-SHRIMP417±3[9]
    夏日哈木正长花岗岩ALA-ICP-MS锆石391±1[30]
    辉长岩-LA-ICP-MS锆石394土3[7]
    闪长玢岩-LA-ICP-MS锆石382±2[31]
    野马泉二长花岗岩ILA-ICP-MS锆石393±2[10]
    花岗闪长岩ILA-ICP-MS锆石386土1
    -LA-ICP-MS锆石392±2[8]
    卡而却卡黑云母二长-SHRIMP锆石410土3[20]
    花岗岩ALA-ICP-MS锆石406±4本文
    牛苦头花岗闪长岩-LA-ICP-MS锆石394土1本文
      注:“-”为文章未涉及
    下载: 导出CSV
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出版历程
  • 收稿日期:  2015-12-04
  • 修回日期:  2016-04-17
  • 网络出版日期:  2023-08-16
  • 刊出日期:  2016-06-30

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