| 刘畅.湖南水口山铅锌多金属矿田中铀的赋存状态及其共生矿物组合[J].地质与勘探,2022,58(1):1-11 |
| 湖南水口山铅锌多金属矿田中铀的赋存状态及其共生矿物组合 |
| The uranium occurrence and paragenetic association of minerals in the Shuikoushan Pb-Zn polymetallic orefield, Hunan Province |
| 投稿时间：2021-06-25 修订日期：2021-12-10 |
| DOI：10.12134/j.dzykt.2022.01.001 |
| 中文关键词: 赋存状态 共生矿物组合 铀矿化 综合开发 水口山矿田 湖南 |
| 英文关键词: uranium occurrence, paragenetic association of minerals, uranium mineralization comprehensive exploitation, Shuikoushan ore-field, Hunan Province |
| 基金项目:中国核工业地质局铀矿地质科研项目《全国共伴生铀资源远景调查》（编号:202040-1）资助 |
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| 摘要点击次数: 2021 |
| 全文下载次数: 667 |
| 中文摘要: |
| 共伴生铀资源的综合开发是近年来铀矿勘查的工作重点之一。湖南水口山铅锌多金属矿田中产有诸多铅锌多金属矿床，且这些矿床中均共伴生有一定规模的铀矿化，是开展共伴生铀资源综合开发的有利地区，但铀矿化的微观地质特征尚不清楚。基于此，本文在前人研究成果的基础上，通过α径迹蚀刻、扫描电镜-能谱分析和电子探针分析，对水口山矿田铅锌多金属矿床中的铀矿石开展了岩矿相学研究。结果显示，水口山矿田中铀矿石多具角砾状构造，铀主要以独立铀矿物（沥青铀矿和铀石）的形式存在，与石英、伊利石和黄铁矿共生，广泛分布在胶结物内，围绕早期硫化物及其氧化后的次生矿物生长，或切穿早期硫化物，少量沿微裂隙充填进入早期含黄铁矿硅质角砾中。铀矿化的产出特征及共生矿物组合揭示其应是铅锌矿化之后构造-热液活动的产物，矿质沉淀发生在还原、中性-弱酸性、低温环境中。结合前人研究成果，认为水口山矿田中的铀矿化具有一定的规模、较高的品位、成熟的开采利用条件，通过现有的地质工程，可实现对共伴生铀资源的综合开发。 |
| 英文摘要: |
| The comprehensive exploitation of concomitant uranium resources is one of the priorities of uranium exploration in recent years. In the Shuikoushan Shuikoushan Pb-Zn polymetallic orefield, many Pb-Zn polymetallic deposits occur, with some associated uranium mineralization. This orefield offers a good opportunity to study associated uranium resources, which however remains unclear about its microscopic geological characteristics of uranium mineralization. On the basis of previous studies, this work conducted systematic petrography and mineralogy of the uranium ores from the Shuikoushan deposit by α track etching, scanning electron microscope-energy spectrum analysis and electron probe microanalysis. The results show that the uranium ores in Shuikoushan orefield commonly have brecciated structure, and uranium mainly occurs as independent uranium minerals (pitchblende and coffinite), associated with quartz, illite and pyrite. These minerals are widely distributed in cements, distribute around early period sulfides or oxidized secondary minerals, or cut through early period sulfides, or fill in early period pyrite-bearing siliceous breccia through microfissure. The characteristics of uranium mineralization and paragenetic association of minerals indicate that the uranium mineralization may be formed by late structure-hydrothermal event after Pb-Zn mineralization, and occurred in reducing, neutral-acidic and low temperature environment. Combined with previous research results, the U mineralization in the Shuikoushan orefield has a certain scale, higher grade and mature mining condition, and existing geological engineering can realize the comprehensive exploitation of associated uranium resources. |
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