| 应用稳定同位素判别治岭头金银矿床的成矿流体性质和来源 |
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| 引用本文：.1988.Characteristics and sources of ore-forming fluids in the Zhilingtou gold-silver deposlt studied by stable isotope method[J].Mineral Deposits,7(4):27~32 |
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| 中文摘要:浙江治岭头金银矿床中两期含金石英脉的氢、氧、碳及硫的稳定同位素研究结果表明各自具有明显不周的同位素组成特征，两期矿化作用的成矿热液流体具不同成因类型。早期是与基底陈蔡群变质水有关的热液流体；而晚期则是与盖层火山岩浆水和古大气降水有关的混合热液流体。因此治岭头矿床是一个具有多源成矿热液流体相叠加的复合型矿床。 |
| 中文关键词:同位素地球化学 金银矿床 热液成因 治岭头 |
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| Characteristics and sources of ore-forming fluids in the Zhilingtou gold-silver deposlt studied by stable isotope method |
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| Abstract:The Zhilingtou gold-silver deposit in Zhejiang province Occurs in metamorphic rocks of Proterozoic Chencai Group and Mesozoic volcanic rocks.A study of stable isotopes in this deposit shows that vein quartzs and their inclusions of two mineralization epochs have their respective characteristics of stable isotopic composition. In the early epoch, the quartzs have δ18O values of +8.2一+9.9‰, hydrothermal waterδ18O values of +1.0一+3.1‰ (obtainted from isotope fractionation equation of quartz-water), and inclusionδD values and δ13C values of -59一-61‰ and一0.12‰,respetcively, while in the late epoch，the quartzs haveδ18O values of+5.5—+8.3‰, hydrothermal water δ18O values of -2.1一-3.9‰, and inclusion δD values and δ13C values -58一-73‰ and -5.4一-5.6‰，respectively. On the basis of the above-described stable istopic compositions, combined with geologic and petrological-mineralogical data, the authors hold that the ore-forming fluids of the early mineralization epoch and of the late epoch came respectively from metamorphic water of Proterozoic Choncai Group and mixed circulating water of Mesozoic volcanic-magmatic water and ancient meteoric water. It is therefore considered that the Zhilingtou gold-silver ore deposit is a composite one formed through superimposition of ore-forming fluids from various sources. |
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