| 湘中锑(金)矿床成矿物质来源——Ⅰ.微量元素及其实验地球化学证据 |
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| 引用本文：.2002.Ore Source of Sb(Au) Deposits in Central Hunan: I.Evidences of Trace Elements and Experimental Geochemistry[J].Mineral Deposits,21(4):366~376 |
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| 基金项目:科技部国家重点基础研究项目(G1999043210)、国家自然科学基金重点项目(49733012)及教育部博士点基金(98028422) |
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| 中文摘要:为了查明湘中盆地中-低温锑(金)矿床的成矿物质来源，文章应用高分辨率ICP-MS、ICP-AES等方法对岩石与矿石进行了系统测定，并结合作者以往分析数据和实验地球化学结果，对该区盆地及周边基底地层与矿床中的微量元素分布特征及其水/岩反应效应进行了综合分析和系统研究。结果表明：Sb，Au等成矿元素在元古界基底碎屑岩中具有高的背景含量；在近似成矿条件的水／岩反应实验中，成矿元素的淋出率达20％～90％；元古界基底碎屑岩中的金(锑、钨)矿床的周围蚀变围岩中出现明显的金负异常区，而盆地内泥盆系地层中的高锑含量仅局限于锑矿床(化)及其蚀变围岩中；湘中锑(金)矿床中的矿石与基底碎屑岩具有相似的稀土元素球粒陨石标准化配分曲线特征。以上微量元素地球化学特征充分证明该区锑(金)矿床锑、金等成矿物质主要来源于元古界基底碎屑岩。 |
| 中文关键词:地球化学 成矿物质来源 微量元素 淋滤实验 锑(金)矿床 湘中地区 |
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| Ore Source of Sb(Au) Deposits in Central Hunan: I.Evidences of Trace Elements and Experimental Geochemistry |
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| Abstract:The central Hunan area is a famous area where occur Sb (Au) mineralization in the world. In this paper, the authors systematically studied trace elements' geochemical characteristics of Sb (Au) deposits in central Hunan and discussed ore source of ore_forming metals. The ore_forming metals such as Sb and Au are high in basement clastics; The leaching experiment shows that the leaching ratio of Sb and Au in clastics may reach 20％～90％; There exists clearly Au abnormity around ore body of Sb(Au) deposits occur in clastics; The REEs contents and distribution patterns of ores are similar to those of basement clastics. All above implicate that the basement clastics are ore source of Sb (Au) deposit in central Hunan basin. |
| keywords:geochemistry, ore souce, antimony (gold) deposit trace element, leaching experiment, central Hunan area |
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