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冷水坑斑岩型银铅锌矿床含矿岩体锆石SHRIMP U-Pb年代学研究

文章导航 > 中国地质 > 2010 > 37(5): 1450-1456

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左力艳1,2侯增谦3孟祥金2杨志明2宋玉财3李政4. 冷水坑斑岩型银铅锌矿床含矿岩体锆石SHRIMP U-Pb年代学研究[J]. 中国地质, 2010, 37(5): 1450-1456.
引用本文: 左力艳1,2侯增谦3孟祥金2杨志明2宋玉财3李政4. 冷水坑斑岩型银铅锌矿床含矿岩体锆石SHRIMP U-Pb年代学研究[J]. 中国地质, 2010, 37(5): 1450-1456.
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ZUO Li-yan1,2, HOU Zeng-qian3, MENG Xiang-jin2, YANG Zhi-ming2, SONG Yu-cai3, LI Zheng4. SHRIMP U-Pb zircon geochronology of the ore-bearing rock in the Lengshuikeng porphyry type Ag-Pb-Zn deposit[J]. Geology in China, 2010, 37(5): 1450-1456.
Citation: ZUO Li-yan1,2, HOU Zeng-qian3, MENG Xiang-jin2, YANG Zhi-ming2, SONG Yu-cai3, LI Zheng4. SHRIMP U-Pb zircon geochronology of the ore-bearing rock in the Lengshuikeng porphyry type Ag-Pb-Zn deposit[J]. Geology in China, 2010, 37(5): 1450-1456.
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冷水坑斑岩型银铅锌矿床含矿岩体锆石SHRIMP U-Pb年代学研究

  • 1.四通资源有限公司,北京 100081;2.中国地质科学院矿产资源研究所,北京 100037;3.中国地质科学院地质研究所,北京 100037;4.北京科技大学土木与环境工程学院,北京 100083

SHRIMP U-Pb zircon geochronology of the ore-bearing rock in the Lengshuikeng porphyry type Ag-Pb-Zn deposit

  • 1. Stone Resources Co., Ltd., Beijing 100037, China; 2. Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China; 3. Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China; 4. School of Civil and Environmental Engineering,Beijing University of Science and Technology,Beijing 100083,China

    摘要
  • 提要：冷水坑斑岩型银铅锌矿床是中国目前唯一的典型斑岩型银铅锌矿床，对于该矿床的成矿斑岩的形成时代至今仍没有精确的年龄数据。本文通过对冷水坑斑岩型银铅锌矿床成矿斑岩（花岗斑岩）样品中的锆石11个测试点的SHRIMP锆石U-Pb年代学研究，得出206Pb/238U加权平均年龄为（162.0±2）Ma(MSWD =1.4)，因此，认为冷水坑花岗斑岩的形成年代为(162.0±2) Ma。冷水坑含矿斑岩成岩年龄与成矿年龄高度一致，成岩年龄与成矿作用开始时间差异不明显。此外，由冷水坑矿床成岩和成矿年龄数据推断出矿化持续时间约27 Ma。
    Abstract：The Lengshuikeng porphyry Ag-Pb-Zn deposit is a unique typical porphyry Ag-Pb-Zn deposit in China, and no precise data concerning the porphyry mineralization age are available. Based on the SHRIMP zircon U-Pb chronologic study of 11 test points of zircon samples from Lengshuikeng porphyry Ag-Pb-Zn mineralized porphyry (granite porphyry), the authors obtained a weighted average 206Pb/238U age of (162.0 ± 2) Ma (MSWD = 1.4). Therefore, the Lengshuikeng granite porphyry was formed in (162.0 ± 2) Ma. Lengshuikeng porphyry geochronological ages of rock formation and ore formation show a high degree of consistency. There is no significant difference between rock-forming and initial ore-forming geochronological ages. In addition, the mineralization age deduced from rock-forming and ore-forming geochronological ages is about 27Ma in the Lengshuikeng ore deposit.
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刊出日期:  2010-10-24

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