| 豫西公峪金矿床地质地球化学特征及成因探讨 |
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| 引用本文：.2004.Geology, Geochemistry and Genesis of Gongyu Altered Tectonite Type Gold Deposi t in Western Henan Province[J].Mineral Deposits,23(1):61~66 |
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| 基金项目:中国地质大学地球科学与资源学院 |
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| 中文摘要:文章较为详细地总结了公峪蚀变岩型金矿的地质特征，将成矿作用分 为3个阶段，即石英-黄铁矿阶段，石英_硫化物阶段和石英-碳酸盐阶段，并测定了矿石样品 的稳定同位素组成。结果表明：硫化物的δ34S值变化于-1.7‰～2.2‰之间，与陨石 硫的δ34S值接近，反映为深源；成矿Ⅰ阶段流体的δD值为-68‰～-86‰，δ18 OH2O为-0.6‰～+4.9‰，成矿Ⅱ阶段流体的δD值为-67‰～-84‰，δ18O H2O为-0.6‰～-8.9‰，反映成矿流体主要有两个来源，Ⅰ阶段以深源水为主，Ⅱ 阶段有大量大气降水混入。公峪金矿与祁雨沟金矿应属于同一成矿系统的产物，均与燕山晚 期岩浆热液活动有关，可能为同源、同期、不同构造空间的演化产物。 |
| 中文关键词:地质学 地质特征 成矿流体 硫氢氧同位素 金矿床 公峪 河南 |
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| Geology, Geochemistry and Genesis of Gongyu Altered Tectonite Type Gold Deposi t in Western Henan Province |
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| Abstract:There are two types of gold deposits in the Qiyugou gold orefield of western Hen an Province, i. e., cryptoexplosive breccia type (Qiyugou gold deposit) and alte red tectonite type (Gongyu gold deposit). In this paper, geological characterist ics of the Gongyu gold deposit are discussed. The S_H_O stable isotope analytica l results of the Gongyu deposit bring us some evidence about its genesis. The δ 34S values of the sulfides range from -1.7‰ to -2.2‰, close to the value s of meteorolite, indicating that the ore_forming substance was probably derived from the upper mantle or some deep place. The δD and the δ18OH2 values of the first ore_forming stage are -68‰～-86‰ and -0.6‰～+4.9‰ respectively, implying that the ore_forming fluids were derived mainly from the deep place. The δD and the δ18OH2O values of the second ore-for ming stage are -67‰～-84‰ and -0.6‰～-8.9‰ respectively, suggesting that the ore-forming fluids probably came from the deep fluid and the meteoric water . It is believed that the mixing of fluids resulted in the deposition of mineral s in the Gongyu gold deposit. The above two types of gold deposits in the Qiyugo u orefield might have been formed in the same metallogenic system related to the Yanshanian hydrothermal fluids. |
| keywords:geology, geological characteristics, ore_forming fluid, stable isotope, Gongyu gold deposit, Henan Province |
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