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    西藏查个勒铜铅锌矿成岩成矿时代及意义

    高顺宝 郑有业 田立明 张众 屈文俊 刘敏院 郑海涛 郑磊 朱继华

    高顺宝, 郑有业, 田立明, 张众, 屈文俊, 刘敏院, 郑海涛, 郑磊, 朱继华, 2012. 西藏查个勒铜铅锌矿成岩成矿时代及意义. 地球科学, 37(3): 507-514. doi: 10.3799/dqkx.2012.057
    引用本文: 高顺宝, 郑有业, 田立明, 张众, 屈文俊, 刘敏院, 郑海涛, 郑磊, 朱继华, 2012. 西藏查个勒铜铅锌矿成岩成矿时代及意义. 地球科学, 37(3): 507-514. doi: 10.3799/dqkx.2012.057
    GAO Shun-bao, ZHENG You-ye, TIAN Li-ming, ZHANG Zhong, QU Wen-jun, LIU Min-yuan, ZHENG Hai-tao, ZHENG Lei, ZHU Ji-hua, 2012. Geochronology of Magmatic Intrusions and Mineralization of Chagele Copper-Lead-Zinc Deposit in Tibet and Its Implications. Earth Science, 37(3): 507-514. doi: 10.3799/dqkx.2012.057
    Citation: GAO Shun-bao, ZHENG You-ye, TIAN Li-ming, ZHANG Zhong, QU Wen-jun, LIU Min-yuan, ZHENG Hai-tao, ZHENG Lei, ZHU Ji-hua, 2012. Geochronology of Magmatic Intrusions and Mineralization of Chagele Copper-Lead-Zinc Deposit in Tibet and Its Implications. Earth Science, 37(3): 507-514. doi: 10.3799/dqkx.2012.057

    西藏查个勒铜铅锌矿成岩成矿时代及意义

    doi: 10.3799/dqkx.2012.057
    基金项目: 

    青藏专项项目 1212010918033

    长江学者和创新团队发展计划 IRT1083

    详细信息
      作者简介:

      高顺宝(1980-), 男, 博士研究生, 矿产普查与勘探专业

      通讯作者:

      郑有业, E-mail: zhyouye@163.com

    • 中图分类号: P613

    Geochronology of Magmatic Intrusions and Mineralization of Chagele Copper-Lead-Zinc Deposit in Tibet and Its Implications

    • 摘要: 西藏查个勒铜铅锌矿在念青唐古拉铜铅锌银成矿带已发现的铜多金属矿床中处于最西端, 矿区同时存在接触交代-充填型铜铅锌矿化和斑岩型铜钼矿化.锆石LA-ICP-MS U-Pb和辉钼矿Re-Os测试表明, 矿区两种类型矿化近乎同时形成, 北部与铜铅锌矿化相关的花岗斑岩成岩时代为62.1±1.1 Ma(MSWD=2.7), 南部与铜钼矿化相关的花岗斑岩成岩时代为63.28±0.86 Ma(MSWD=3.2), 南部辉钼矿Re-Os等时线年龄为61.49±0.60 Ma(MSWD=1.5), 是在雅鲁藏布江洋盆北向俯冲后的同碰撞期形成的.该成果完善和充实了念青唐古拉铜铅锌银成矿带碰撞期成矿的时间演化序列, 且使该带规模在原有基础之上向西延伸了200 km(谢通门县青都-昂仁县查个勒), 显示该带为一条贯穿东西、以碰撞期成矿为主、长大于800 km的巨型铜铅锌银成矿带, 并为继续在此带向西寻找该类型矿床提供了重要依据.

       

    • 图  1  查个勒矿区地质简图

      1.冰碛、冲洪积、残破积;2.始新统帕那组流纹质含火山角砾凝灰质熔岩;3.中二叠统下拉组三段灰岩、钙质板岩;4.中二叠统下拉组二段石英(杂)砂岩、板岩;5.中二叠统下拉组一段千枚岩;6.花岗斑岩;7.铜铅锌矿体;8.断层破碎带及铜钼矿体;9.断层;10.脆-韧性剪切带;11.采样位置

      Fig.  1.  Geological map of Chagele deposit

      图  2  查个勒矿区花岗斑岩锆石阴极发光照片

      Fig.  2.  CL images of zircons for porphyry granite in Chagele deposit

      图  3  查个勒矿区花岗斑岩锆石U-Pb谐和图

      Fig.  3.  U-Pb Concordia diagrams of zircons for porphyry granite in Chagele deposit

      图  4  查个勒矿区辉钼矿Re-Os等值线年龄(a)和加权平均年龄(b)

      Fig.  4.  Re-Os isotopic isochron diagram (a) and weighted meanmodelage diagram (b) of molybdenite in Chagele deposit

      表  1  查个勒矿区锆石LA-ICPMS同位素分析结果

      Table  1.   U-Pb LA-ICPMS analyses of zircon from Chagele deposit

      点号 组成(10-6) Th/U 同位素比值 年龄(Ma)
      Pb Th U 207Pb/206Pb 207Pb/235U 206Pb/238U 207Pb/206Pb 207Pb/235U 206Pb/238U
      CGLD1-B4-1 5.74 259 433 0.60 0.059 0 0.003 0 0.083 9 0.004 2 0.010 4 0.000 1 565 109 81.8 3.9 66.8 0.8
      CGLD1-B4-2 2.31 108 190 0.57 0.068 4 0.008 1 0.091 3 0.011 0 0.010 1 0.000 2 883 246 88.7 10.3 64.7 1.3
      CGLD1-B4-3 3.09 176 223 0.79 0.078 3 0.006 2 0.107 1 0.008 3 0.010 1 0.000 2 1 154 158 103 7.6 64.8 1.2
      CGLD1-B4-5 4.17 176 360 0.49 0.051 6 0.003 0 0.067 7 0.003 8 0.009 7 0.000 1 333 135 66.5 3.6 62.2 0.9
      CGLD1-B4-6 5.85 277 497 0.56 0.048 0 0.002 9 0.064 1 0.003 7 0.009 8 0.000 1 102 137 63.1 3.5 63.0 0.9
      CGLD1-B4-8 4.17 197 365 0.54 0.048 1 0.003 2 0.060 3 0.003 6 0.009 4 0.000 1 101.9 151.8 59.4 3.5 60.6 0.9
      CGLD1-B4-9 7.61 303 575 0.53 0.052 3 0.005 3 0.077 2 0.007 4 0.010 8 0.000 1 298 233 75.5 7.0 69.4 0.9
      CGLD1-B4-10 3.47 187 289 0.65 0.055 5 0.003 9 0.069 7 0.004 7 0.009 3 0.000 2 435 125 68.4 4.5 59.9 1.0
      CGLD1-B4-11 4.66 198 320 0.62 0.081 0 0.004 2 0.120 4 0.006 4 0.010 8 0.000 2 1 233 101 115 5.8 69.1 1.0
      CGLD1-B4-12 4.21 267 333 0.80 0.054 6 0.002 9 0.070 5 0.003 6 0.009 5 0.000 1 394 117 69.2 3.4 60.7 0.9
      CGLD1-B4-14 3.92 176 310 0.57 0.053 8 0.003 1 0.074 8 0.004 3 0.010 1 0.000 2 361 127 73.2 4.0 64.8 1.1
      CGLD1-B4-15 11.45 385 887 0.43 0.052 5 0.002 0 0.078 9 0.003 1 0.010 8 0.000 1 309 89 77.1 2.9 69.6 0.9
      CGLD1-B4-16 8.89 341 691 0.49 0.048 8 0.002 1 0.072 0 0.003 0 0.010 7 0.000 1 139 102 70.6 2.8 68.8 0.9
      CGLD1-B4-17 4.30 218 355 0.61 0.051 8 0.003 2 0.067 7 0.004 1 0.009 6 0.000 1 276 143 66.5 3.9 61.5 0.9
      CGLD1-B4-18 5.72 273 467 0.58 0.048 9 0.002 5 0.065 3 0.003 5 0.009 7 0.000 1 143 120 64.2 3.3 62.5 0.8
      CGLD1-B4-19 87.8 3 893 6 372 0.61 0.052 5 0.001 1 0.078 9 0.001 7 0.010 8 0.000 1 309 46 77.1 1.6 69.4 0.6
      CGLD1-B4-20 3.28 204 261 0.78 0.059 4 0.003 9 0.077 9 0.005 0 0.009 7 0.000 1 583 141 76.2 4.7 62.0 0.9
      CGLD3-B4-1 24.1 434 463 0.94 0.051 9 0.003 4 0.075 4 0.004 5 0.010 9 0.000 2 280 148 73.8 4.3 69.8 1.0
      CGLD3-B4-2 13.7 246 348 0.71 0.055 8 0.003 3 0.074 2 0.004 2 0.009 8 0.000 1 443 130 72.7 3.9 62.7 0.9
      CGLD3-B4-3 4.59 74.4 101 0.73 0.087 5 0.007 4 0.111 7 0.008 0 0.009 8 0.000 3 1 372 164 108 7 63.2 1.6
      CGLD3-B4-4 17.5 279 351 0.79 0.068 0 0.008 7 0.094 0 0.011 7 0.010 2 0.000 2 878 262 91.2 10.9 65.3 1.0
      CGLD3-B4-5 15.1 266 389 0.68 0.048 8 0.002 9 0.062 6 0.003 5 0.009 4 0.000 1 200 133 61.6 3.3 60.6 0.9
      CGLD3-B4-6 17.9 293 392 0.75 0.050 0 0.002 8 0.069 7 0.003 8 0.010 2 0.000 2 195 130 68.4 3.6 65.7 1.0
      CGLD3-B4-7 32.3 629 666 0.94 0.050 1 0.002 4 0.068 4 0.003 1 0.010 0 0.000 1 211 109 67.1 2.9 63.9 0.9
      CGLD3-B4-8 8.9 163 191 0.85 0.067 7 0.008 4 0.085 5 0.010 6 0.009 6 0.000 2 861 255 83.3 9.9 61.7 1.1
      CGLD3-B4-9 19.8 369 433 0.85 0.050 9 0.002 9 0.067 2 0.003 8 0.009 6 0.000 1 235 131 66.0 3.6 61.6 0.8
      CGLD3-B4-10 25.1 450 582 0.77 0.047 4 0.002 7 0.064 0 0.003 5 0.009 9 0.000 1 77.9 120.4 63.0 3.3 63.2 0.8
      CGLD3-B4-11 23.1 409 436 0.94 0.053 3 0.002 5 0.071 4 0.003 3 0.009 8 0.000 1 339 107 70.0 3.2 62.6 0.9
      CGLD3-B4-12 11.2 182 205 0.89 0.054 8 0.004 9 0.069 1 0.005 7 0.009 5 0.000 2 467 200 67.8 5.4 60.6 1.2
      CGLD3-B4-13 50.4 855 938 0.91 0.046 8 0.002 0 0.071 0 0.002 9 0.011 1 0.000 1 39.0 161.1 69.7 2.7 71.1 0.8
      CGLD3-B4-14 13.9 229 261 0.88 0.050 8 0.003 2 0.074 5 0.004 6 0.010 7 0.000 2 232 146 73.0 4.4 68.4 1.0
      CGLD3-B4-15 14.8 233 443 0.53 0.053 6 0.002 9 0.074 1 0.003 9 0.010 2 0.000 1 354 119 72.6 3.7 65.4 0.9
      CGLD3-B4-16 29.6 515 668 0.77 0.051 7 0.002 3 0.071 2 0.003 0 0.010 1 0.000 1 333 106 69.8 2.9 64.9 0.7
      CGLD3-B4-17 24.9 439 632 0.70 0.054 6 0.003 7 0.072 5 0.004 1 0.009 8 0.000 1 394 152 71.1 3.9 62.9 0.8
      CGLD3-B4-18 15.6 287 280 1.02 0.055 3 0.003 9 0.075 9 0.005 0 0.010 2 0.000 2 433 157 74.3 4.8 65.6 1.1
      CGLD3-B4-19 73 1 139 1 752 0.65 0.048 2 0.001 5 0.072 8 0.002 2 0.010 9 0.000 1 109 77 71.4 2.1 70.1 0.7
      CGLD3-B4-20 23.6 424 527 0.80 0.051 0 0.002 6 0.067 6 0.003 4 0.009 7 0.000 1 239 119 66.4 3.2 62.5 0.7
      下载: 导出CSV

      表  2  查个勒矿床辉钼矿Re-Os同位素分析数据

      Table  2.   Results of Re-Os sisotopic dating of molybdenite from Chagele deposit

      样名 样重(g) Re(10-6) 普Os(10-9) 187Re(10-6) 187Os(10-9) 模式年龄(Ma)
      测定值 不确定度 测定值 不确定度 测定值 不确定度 测定值 不确定度 测定值 不确定度
      CGLMo1 0.102 16 3.366 0.027 0.010 3 0.005 2 2.116 0.017 2.164 0.020 61.37 0.90
      CGLMo2 0.101 18 5.213 0.038 0.001 3 0.004 5 3.277 0.024 3.395 0.031 62.15 0.88
      CGLMo3 0.100 11 1.391 0.012 0.001 3 0.003 0 0.874 3 0.007 6 0.901 2 0.007 6 61.84 0.90
      CGLMo4 0.100 56 0.791 9 0.006 9 0.007 3 0.001 5 0.497 7 0.004 3 0.519 6 0.004 4 62.63 0.91
      CGLMo5 0.101 88 1.636 0.016 0.008 7 0.004 4 1.028 0.010 1.054 0.009 61.54 0.95
      下载: 导出CSV
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    出版历程
    • 收稿日期:  2011-11-15
    • 网络出版日期:  2021-11-09
    • 刊出日期:  2012-05-01

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