| 北祁连块状硫化物矿床中矿石和主要矿石矿物地球化学特征 |
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| 引用本文：.1994.Geochemical characteristics of ores and major ore minerals from the massive sulfide deposits in North Qilian Mountains[J].Mineral Deposits,13(1):61~74 |
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| 中文摘要:对北祁连山白银矿田和郭密寺矿田中主要矿床的矿石和矿石矿物组分特征研究表明，由于各矿田的成矿条件和地球化学背景存在差异，造成不同矿床的矿石和矿石矿物元素组合各具特色。但作为同一类型矿床，它们之间又有很多共性，特别是同一矿田内各矿床的地球化学特征具有相似性和过渡性，反映了成矿条件变化的趋势。 |
| 中文关键词:块状硫化物矿床 白银矿田 郭密寺矿田 矿石 矿石矿物 |
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| Geochemical characteristics of ores and major ore minerals from the massive sulfide deposits in North Qilian Mountains |
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| Abstract:Baiyin and Guomisi are important representative massive sulfide orefields in North Qilian mountains. A comparative study on chemical composition of ores and major sulfide minerals from the orefields can reveal the following characteristics. In the Baiyin orofield, the Zheyaoshan ore deposit consists chiefly of copper ores, and is poor in minor elements; the Huoyanshan deposit is predominated by copper ores associated with some polymetallic ores, with minor elements being mainly bismuth and arsenic; the Xiaotieshan deposit is mainly composed of zinc-lead-copper polymetallic ores, associated with gold, silver, mercury, antimony etc. The deposits in the Guomisi orefield are chiefly made up of zinc-lead-copper polymetallic ores together with some copper-rich and lead-rich ores. Among them, the Xiagou deposit is rich in gold, whereas the Guomisi deposit is rich in bismlith. Although there exists some disparity of ore composition between the two orefields, chemical components of ores from different deposits show certain connection and transitional relationship within the same orefield. Chemical components of sulfide minerals demonstrate that the Baiyin ore field is characteristically rich in cobalt, nickel, tin, barium, mercury, bismuth and manganese, while the Guomisi orefield is noted for the richness of arsenic, antimony, gallium, silver, molybdenum and chromium. This must have resulted from the difference in metallogenic conditions and geochemical back ground of the two orefields. The common features of the two orefields are that from the copper(zinc)type ore deposits to the zinc-lead-copper polymetallic deposits where exists an evolution trend from the high temperature element association to the low temperature element association. |
| keywords:massive sulfide deposit, the Baiyin orefield, the Guomisi orefield, ore, ore mineral |
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