| 潘泽伟.滇西陇川营盘山离子吸附型稀土矿稀土元素分布特征[J].地质与勘探,2021,57(4):784-795 |
| 滇西陇川营盘山离子吸附型稀土矿稀土元素分布特征 |
| REE distribution characteristics of the Yingpanshan ion adsorption type rare-earth deposit in the Longchuan area of Western Yunnan |
| 投稿时间：2020-12-01 修订日期：2021-03-28 |
| DOI：10.12134/j.dzykt.2021.04.006 |
| 中文关键词: 离子吸附型稀土矿 稀土配分 富集 ICP-MS 营盘山稀土矿 陇川 滇西 |
| 英文关键词: ion adsorption type rare earth ore, rare earth partition, enrichment,ICP-MS,Yingpanshan rare-earth deposit,Longchuan,western Yunnan |
| 基金项目:云南省地质勘查基金项目《云南省陇川县大曼别-龙安地区三稀矿产资源调查评价》（编号：D202007）资助 |
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| 中文摘要: |
| 滇西陇川地区广泛分布着白垩纪至古近纪中酸性花岗岩，以邦棍尖山为代表的岩体花岗岩稀土含量较高，经复杂的风化淋滤作用，岩体中的稀土元素在风化壳中迁移、富集成矿，陇川营盘山稀土矿即为近年新发现的该类型矿产地之一。为研究新发现的营盘山稀土矿稀土元素分布特征、富集规律及稀土配分特征，利用电感耦合等离子体质谱仪（ICP-MS）分析成矿母岩及其风化壳不同风化程度样品稀土分量，结果表明：风化壳各层位稀土元素分布特征相比母岩具有明显的继承性，随风化程度升高，轻重稀土分馏程度升高，轻稀土在全风化层上部相对富集，且随风化程度升高轻稀土富集程度升高，而重稀土的富集程度则逐渐减弱，Gd是风化壳富集能力最强的元素，Dy富集能力最弱，Ce富集在近地表，重稀土具有更强的向下迁移能力。同时，研究发现该稀土矿床的稀土配分特征为低钇、铕，富镧、铈、钕。 |
| 英文摘要: |
| Cretaceous to Paleogene intermediate-acid granites are widely distributed in the Longchuan area, western Yunnan. The granite body represented by the Banggunjian Mountains has high rare earth content. After complex weathering and leaching, rare earth elements in the rock body migrated and enriched in the weathering crust to form ore. The Yingpanshan rare earth deposit in Longchuan is one of the newly discovered ore deposits in recent years. This work studied the distribution, enrichment and distribution characteristics of rare earth elements in the Yingpanshan rare earth deposit. ICP-MS was used to analyze the rare earth elements in the ore-forming parent rock and weathering crust samples with different weathering degrees. Results show that with the increase of weathering degree, light REE is relatively enriched in the upper part of the completely weathering layer, and with the increase of weathering degree, light REE is enriched, while the enrichment of heavy REE is gradually weakened. Gd is the element with the strongest enrichment ability in the weathering crust, Dy is the weakest, Ce is enriched near the surface, and heavy REE has stronger downward migration ability. At the same time, the REE distribution of the deposit is characterized by low Y and Eu, and rich La, Ce and Nd. |
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