王长兵,廖志凯,杜小波,包大林,洪鑫科,张兴桐,严城民,周家喜.滇东南建水离子吸附型稀土矿边界品位与工业品位的确定方法[J].矿产勘查,2023,14(11):2161-2172 |
滇东南建水离子吸附型稀土矿边界品位与工业品位的确定方法 |
Determination of boundary grade and industrial grade of ion-adsorbed rare earth deposits in Jianshui, southeastern Yunnan |
投稿时间:2021-11-04 修订日期:2022-02-21 |
DOI:10.20008/j.kckc.202311015 |
中文关键词: 建水 离子吸附型稀土矿床 地质勘查规范 边界品位与工业品位 双指标 |
英文关键词: Jianshui ion adsorption rare earth deposit geological exploration specification cut-off grade and industrial grade double index |
基金项目:本文受云南省高新技术产业发展项目计划(201704)资助。 |
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中文摘要: |
如何实现“规范”规定的边界品位与工业品位与矿山开发利用品位互相协调是评价离子吸附型稀土矿床资源量的重点和难点。本文对建水离子吸附型稀土矿床黏土层、全风化层、半风化层、弱风化层中全相稀土氧化物(TRE2O3)和离子相稀土氧化物(SRE2O3)变化规律进行研究。研究表明,建水稀土矿的SRE2O3受风化层位控制,黏土层较高→全风化层最高→半风化层较低→弱风化层最低,TRE2O3含量越高,则SRE2O3含量越高,越有利于形成离子吸附型稀土矿床(弱风化层除外)。建水稀土矿床的上矿层与下矿层SRE2O3含量、稀土配分及每吨稀土价格等具有显著差异,研究认为应采用“双指标”圈定矿体和估算资源量,即全风化层工业边界品位≥0.070%,最低工业品位≥0.100%;半风化层边界品位≥0.100%,最低工业品位≥0.150%。该方法在同类型稀土矿的资源量评价工作具有推广应用价值。 |
英文摘要: |
How to realize the coordination of boundary grade, industrial grade and mine exploitation grade is the key and difficult point in evaluating the resource quantity of ion-adsorbed rare earth deposit. In this paper, the variation rules of all-phase rare earth oxides (TRE2O3) and ion-phase rare earth oxides (SRE2O3) in clay layer, total regolith, semi-regolith and weak regolith of Jianshui ion adsorbed rare earth deposit are studied. The results show that SRE2O3 in Jianshui rare earth mine is controlled by regolith position, with higher clay layer → highest total regolith → lower semi-regolith → lowest weak regolith. The higher the content of SRE2O3, the higher the content of SRE2O3, the more favorable the formation of ion-adsorbed rare earth deposit (except weak regolith). There are significant differences in SRE2O3 content, rare earth fraction and rare earth price per ton between the upper and lower layers of Jianshui rare earth deposit. The study suggests that "dual indexes" should be used to delineate ore bodies and estimate resources, that is, the industrial boundary grade of the whole weathering layer is ≥0.070%, and the lowest industrial grade is ≥0.100%. Semi-weathering boundary grade ≥0.100%, minimum industrial grade ≥0.150%. This method has the value of popularization and application in the resource evaluation of the same type rare earth deposit. |
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