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坦桑尼亚某条带状铁建造型金矿床矿石工艺矿物学研究
- 作者：
- 周瑶
- 作者单位：
- 河南省地质矿产勘查开发局第一地质矿产调查院
基金项目：
- 国外矿产资源风险勘查专项资金项目（201210B01600234）
详细信息：
- 作者简介：
- 周瑶（1978—），女，工程师，从事岩矿测试工作；E-mail：251962751@qq.com
- 通讯作者：
- isnull
- PDF下载
Mineralogical study of a banded iron-formation gold deposit in Tanzania
- English Author：
- The First Institute of Geological and Mineral Resources Survey,Henan Bureau of Geology and Mineral Exploration and Development
- Unit：
- 摘要
- 在线预览
- 参考文献
摘要:
坦桑尼亚某条带状铁建造型金矿床矿石工艺类型为黄铁矿化硅化破碎带蚀变岩型金矿石。通过显微镜下鉴定、扫描电镜分析、X射线衍射分析及化学物相分析等手段对该矿床金矿石中矿石成分、矿物种类、粒度分布、金的赋存状态等工艺矿物学特征进行了详细研究。结果表明：矿石中金矿物为自然金，粒度偏细，集中分布在50 μm以下，其中10 μm以下占27.54 %；矿石中主要载金矿物为石英、黄铁矿、毒砂等；金嵌布状态以粒间金为主，占52.72 %，其次为包裹金，占37.23 %；矿石中较多包裹金和细粒磁铁矿的存在是影响选矿指标的主要因素。研究结果为该矿床选矿工艺设计提供了依据。
关键词:
条带状铁建造型金矿床；工艺矿物学；赋存状态；矿物解离度；坦桑尼亚
Abstract:
The ore mineralogy of a banded iron-formation gold deposit in Tanzania is characterized by the altered ores on the broken zone with pyrite mineralization and silicifications.The ore’s mineralogical characteristics,including ore composition,mineral species,particle size distribution,and occurrence of gold,were studied in detail through methods such as microscopic identification,scanning electron microscopy analysis,X-ray diffraction analysis,and chemical phase analysis.The results showed that the gold minerals in the ore were native gold,with a fine particle size mainly distributed below 50 μm,and the portion below 10 μm accounted for 27.54 %.The main gold-carrier minerals in the ore were quartz,pyrite,and arsenopyrite.The gold occurrence was mainly in intergranular form,accounting for 52.72 %,followed by inclusion form,accounting for 37.23 %.The presence of abundant inclusion of gold and fine-grained magnetite in the ore was the main factor affecting the beneficiation indicators.The research results provide a basis for the design of the beneficiation process for this deposit.
Keywords:
banded iron-formation gold deposit;process mineralogy;occurrence state;mineral dissociation degree;Tanzania
