The Genesis of Regolith-Hosted Heavy Rare Earth Element Deposits: Insights from the World-Class Zudong Deposit in Jiangxi Province, South China
The Genesis of Regolith-Hosted Heavy Rare Earth Element Deposits: Insights from the World-Class Zudong Deposit in Jiangxi Province, South China
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DOI：
10.5382/econgeo.4642
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发表时间：
2019-05-01
期刊：
影响因子：
5.8
通讯作者：
Williams-Jones, Anthony E.
中科院分区：
文献类型：
--
作者：
Li, Martin Yan Hei;Zhou, Mei-Fu;Williams-Jones, Anthony E.
中国南方的祖东重稀土元素（HREE）矿床是世界上最大的风化岩重稀土矿床，稀土氧化物（REOs）资源量约为17,600吨(t)，平均品位约为0.1%。尽管经过了40多年的勘探和开采，但对该矿床的成因仍知之甚少。母质a型花岗岩的亚热带风化作用形成的矿体主要赋存于土壤的下B层至上C层，发育在中等切割地貌（坡度约150 m）的山坡上。矿体厚度从几米到10米不等。REE浓度从A层的300 ppm左右增加到B层下部至C层上部的1500 ppm左右，并随着剖面深度的增加而降低。整个土壤剖面均富集稀土元素，具有（La/Yb）(N)比值
The Zudong heavy rare earth element (HREE) deposit in South China is the largest regolith-hosted HREE deposit in the world, with a resource of similar to 17,600 tonnes (t) of rare earth oxides (REOs) at an average grade of similar to 0.1 wt % REOs. Despite more than 40 years of exploration and exploitation, the genesis of this deposit is poorly understood. Subtropical weathering of the parent A-type granite formed orebodies hosted mainly within the lower B to upper C horizons of the resulting soil, which is developed on the hillsides of a moderately incised landscape (relief similar to 150 m). The thickness of the orebodies varies from a few meters to up to 10 m. REE concentrations increase from similar to 300 ppm in the A horizon to similar to 1,500 ppm in the lower B to upper C horizons and decrease with further depth in the profile. The entire soil profile is enriched in HREEs, with (La/Yb)(N) ratios