| 黔东南地区花桥金矿金赋存状态研究 |
| 其他题名 | An Experimental Study on Occurrence Characteristics of Gold in Huaqiao
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| 江俊杰
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| 学位类型 | 硕士
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| 2007-05-31
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| 学位授予单位 | 中国科学院地球化学研究所
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| 学位授予地点 | 地球化学研究所
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| 学位名称 | 博士
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| 关键词 | 金
物相分析
溶解实验
吸附作用
黔东南
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| 摘要 | 随着黄金资源的逐年开采，高品位易选矿石不断减少，低品位难处理矿石所占比例越来越大，如何最大限度地开发利用黄金矿产资源，是我们所面临的实际问题。目前很多的金矿的金矿石类型复杂，金粒度小，富集困难。因此查明金矿中金的赋存状态就显得十分重要。本文以黔东南锦屏花桥金矿为例，开展了一系列溶解实验和物相分析实验研究，并结合物理方法进一步验证，论述了花桥金矿金的赋存状态。
1．金为不活泼金属,在自然界主要呈自然金及金属互化物，金不易被氧化，是唯一在高温下不与氧起化学反应的物质。但金可以Au1+和Au3+氧化态出现，金离子极化能力很强，容易形成稳定的易溶的配位化合物。
2．根据地质踏勘了解到花桥金矿区含矿不均匀性、矿化分散、矿体厚度变化大。矿石中除金矿物外，以黄铁矿、毒砂、闪锌矿、方铅矿为主，而非金属矿物主要是石英。
3．通过对该矿区特征性单矿物溶解实验研究和单矿物金含量实验研究，笔者认为：方解石和菱铁矿极易溶于低浓度盐酸，闪锌矿和方铅矿可溶于40%的盐酸，毒砂和黄铁矿在短时间内不溶于盐酸，高温灼烧过后的毒砂和黄铁矿才能溶于盐酸。该金矿单矿物中除自然金外黄铁矿和毒砂中含金，方解石、菱铁矿和方铅矿等单矿物中不含金。
4、通过对该矿区样品金赋存状态实验研究和电子探针实验研究，认为该金矿金的赋存形式主要是明金和载体金（包裹在其它矿物中的微粒金），从实验室物相分析实验来看载体矿物主要为黄铁矿和毒砂。断层蚀变带样品中载体金所占比例较高，而石英脉中的金则主要以明金为主。
5、在选、冶工艺中要注意对黄铁矿及毒砂包裹微粒金的回收。 |
| 其他摘要 | With increase of the exploitation of the gold resources all the year round, the high grade and easily selected ore is running down, and the proportion of low grade ore is getting bigger. How to get the maximum use out of gold minerals resources is the main difficulty that we faced. At present, the gold ore is complex with very small particle size, which is not fit to gold enrichment. So, analyzing the occurrence type of gold is important. Taking the Huaqiao gold Mine Area of SE Guizhou Jinping as example, we have developed a series of experimental study of dissolvent and phase analysis，discussed the occurrence type of gold.
1.Gold is an un-reactive metal; it affects native gold or metallic compounds in nature. It is the only not reacting chemically material at very high temperature and is difficult to oxidized. Gold appears in the form of Au1+ and Au3+. The polarization capability of gold ion is very great. And it forms stable dissoluble coordination compound easily.
2.According to the geological investigation, the author found the mineral is not well-distributed, mineralized lands are decentralized and the thickness of mineral deposit is changed. Excepting gold mineral in the ore, largely metallic minerals are pyrite, arsenopyrite, zinc and largely nonmetallic mineral is quartz.
3.Based on the experimental research about solubility of typical individual mineral and contents of gold in typical individual mineral in the mining district, the author believed that calcite and siderite can be easily dissolved in low concentration chlorhydric acid，and sphalerite and galena can be dissolved in chlorhydric acid with 40% concentration, and arsenopyrite and pyrite don’t dissolved in chlordydric acid unless they are burned with high temperature. In the gold deposit, pyrite and arsenopyrite enrich gold, while calcite, siderite and galena are poor in gold.
4.By studying the occurrence characteristics of gold in the mining district by electron microprobe, the author suggested that there are two types gold, one is gold minerals and the other is gold in carrier; and the carriers are mainly pyrite and arsenopyrite by mineral phase analyzing in the gold deposit. In the fault alteration belt, most gold occurs in carriers; while in quartz vein, gold minerals occur mainly.
5．Need to pay attention to the golden particle reclaim to pyrite and the poisonous grit parcel in choosing a handicraft. |
| 页数 | 62
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| 语种 | 中文
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| 文献类型 | 学位论文
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| 条目标识符 | http://ir.gyig.ac.cn/handle/352002/3320
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| 专题 | 研究生_研究生_学位论文
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推荐引用方式
GB/T 7714 |
江俊杰. 黔东南地区花桥金矿金赋存状态研究[D]. 地球化学研究所. 中国科学院地球化学研究所,2007.
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