| 离子型稀土矿土壤粒度分布特征研究——以赣县姜窝子稀土矿山为例 |
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| 引用本文： | 柳传毅,刘金辉,钟连祥,徐狮,陈陵康.离子型稀土矿土壤粒度分布特征研究——以赣县姜窝子稀土矿山为例[J].有色金属科学与工程,2017,8(4):125-130. |
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| 作者姓名： | 柳传毅 刘金辉 钟连祥 徐狮 陈陵康 |
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| 作者单位： | 江西理工大学资源与环境工程学院, 江西赣州341000 |
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| 基金项目： | 中国博士后科学基金面上项目2015M582530江西省教育厅基金资助项目GJJ150657江西省科技厅基金资助项目20161BAB203092 |
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| 摘 要： | 颗粒粒度分布对土壤水分运动和溶质迁移，以及水土流失有重要影响. 利用水洗分筛和激光粒度分析技术研究了江西赣县姜窝子稀土矿土壤颗粒粒度并探讨了土壤颗粒粒度在垂直方向的分布规律. 研究表明，姜窝子稀土矿山土壤颗粒粒度分布受风化程度、颗粒垂向迁移因素的影响，呈如下分布:①离子型稀土矿土壤颗粒按直径分为粗、细、粉、黏粒结构，且土壤粗颗粒以石英为主，稀土矿土壤颗粒粒度呈驼峰式分布，即粒径在粗颗粒（ > 2 mm） 和黏粒（ < 0.075 mm）含量较高，粒径在细、粉粒（0.075~2 mm）含量相对较低;②受风化程度和颗粒垂向迁移的影响，稀土矿土壤细、黏粒组分的含量随深度增大呈先升后降的曲线形态；③黏粒（ < 0.075 mm）激光粒度分析表明，颗粒分布随粒径的大小变化与粒径大于0.075 mm的颗粒在深度上的分布相似.
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| 关 键 词： | 离子型稀土矿石 土壤颗粒级配分析 分布特征 |
| 收稿时间： | 2016-12-25 |
Soil particle size distribution characteristics of ionic rare earth:A case study in rare earth mine of Jiangwozi in Gan County |
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| Affiliation: | School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China |
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| Abstract: | The particle size distribution could have impact on water movement in soil and solute migration as well as water loss and soil erosion. In order to study the distribution characteristics of soil particle size in the vertical direction, water sieve analysis and laser particle size analysis of soil particle size of rare earth ore in Jiangwozi in Gan county, Jiangxi were conducted. The result shows that the distribution of particle size is affected by weathering degree and vertical migration of particles. The distribution is as follows: (1)According to its diameter, soil particles can be divided into coarse, fine, powder, clay structure and the coarse particles of the soil are mainly quartz, in addition, the distribution of soil particles in the rare earth mine can be characterized as hump type. The contents of particle size in the coarse particles ( > 2mm) and clay ( < 0.075mm) are high, while the content of the particle size in fine powder (0.075-2mm) is relatively low.(2) Because of the influence of weathering degree and vertical migration of particles, the content of fine and clay granules in the rare earth mineral increases first and then decreases in tracing pattern.(3) Laser particle size analysis of clay ( < 0.075) shows that particle size distribution changes with the size of the particle size which is similar to the distribution in depth of particles whose size is greater than 0.075 millimeter. |
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