| 王 岩.广西金龙铝土矿地质与地球化学特征研究[J].地质与勘探,2015,51(2):266-274 |
| 广西金龙铝土矿地质与地球化学特征研究 |
| Geological and geochemical characteristics of the Jinlong bauxite deposit in Guangxi Province |
| 投稿时间：2014-04-17 修订日期：2014-10-22 |
| DOI： |
| 中文关键词: 金龙 堆积型铝土矿 地球化学 嵌布特征 |
| 英文关键词: Jinlong, accumulation type bauxite, geochemistry, dissemination characteristics |
| 基金项目:中央级公益性科研院所基本科研业务费专项资金（K1312），地质矿产调查评价项目（1212011220806，12120114051301，12120114051401，12120114004001）联合资助 |
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| 中文摘要: |
| 采用常量、稀土分析、X粉晶衍射、镜下鉴定、红外光谱、扫描电镜等方法，系统研究广西金龙铝土矿的地质与地球化学特征. 结果表明：矿区Al2O3平均品位约44%，铝硅比均值约3.57，主要矿物有硬水铝石（37%）、高岭石、叶腊石、锐钛矿，部分含赤铁矿、针铁矿、三水铝石。ΣREE相对富集，样品δEu存在负异常，δCe异常不明显，沉积环境多为海陆过渡相，成矿环境以还原环境沉积为主导，有异地沉积等成矿物质多源特征。硬水铝石属斜方晶系双锥体类，在矿石中与高岭石、叶腊石等嵌布伴生，不易分选。 |
| 英文摘要: |
| The geological and geochemical characteristics of the Jinlong bauxite deposit in Guangxi were systematically studied by using constant and REE analysis, X-ray diffraction (XRD), microscopic identification, FTIR spectroscopic analysis and scanning electron microscope analysis (SEM). The results show that the average grade of Al2O3 in the Jinlong bauxite deposit is 44%, and A/S is about 3.57. The main minerals include diaspora (37%), kaolinite, pyrophyllite, and anatase, with some hematite, goethite and gibbsite. The REE are relatively enriched, δEu exhibits negative anomalies, and anomalies of δCe not obvious. Research suggests that the Jinlong bauxite formed primarily in reduction sediments of marine-land transitional facies, with multi-sources and allochthonous deposition features. Diaspora represents an orthorhombic dipyramidal class, and is often accompanied by kaolinite and pyrophyllite which are not easy to sort. |
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