| 内蒙古孟恩陶勒盖银铅锌矿床白云母Ar-Ar年龄及其意义 |
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| 引用本文：.2003.Mengentaolegai Ag-Pb-Zn Deposit in Inner Mongolia: Ar-Ar Age of Muscovite and Its Significance [J].Mineral Deposits,22(3):253~256 |
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| 基金项目:中国地质调查局项目(编号：200110200018) |
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| 中文摘要:文章采用Ar-Ar同位素测年法对孟恩陶勒盖银铅锌矿云英岩化阶段形成的白云母进行了测试，获得白云母坪年龄为(179.0±1.5) Ma，等时线年龄为(182.3±3.8) Ma。这组数据近似地代表了该矿床的形成年龄，同时也显示该地区除已知的晚侏罗-早白垩世构造-岩浆-成矿作用外，还有一期重要的早侏罗_中侏罗世构造-岩浆-热液成矿事件，这也是到目前为止所获得的大兴安岭中南段热液矿床最老的成矿年龄。 |
| 中文关键词:地球化学 Ar-Ar年龄 银铅锌矿床 热液矿床 孟恩陶勒盖 大兴安岭 |
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| Mengentaolegai Ag-Pb-Zn Deposit in Inner Mongolia: Ar-Ar Age of Muscovite and Its Significance |
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| Abstract:In the present paper, the authors have made Ar-Ar isotopic geochronological studies of the muscovite formed at the greisenization stage of the Mengentaolegai silver_lead_zinc deposit. The result shows that the muscovite has an Ar-Ar plateau age of (179.0±1.5) Ma and isochron age of (182.3±3.8) Ma , which represent the age of the deposit. This proves that, in addition to the late Jurassic_early Cretaceous event, there exists an important early_middle Jurassic tectonic-magmatic-hydrothermal mineralization event in the southern and middle parts of the Da Hinggan Mountains, which seems to be the oldest mineralization age of the hydrothermal deposits in the area. |
| keywords:geochemistry, Ar-Ar age, Ag-Pb-Zn deposit, hydrothermal deposit, Mengentaolegai, Da Hinggan Mountains |
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