清溪岩体稀土矿床地质特征及重稀土找矿潜力

对赣南清溪岩体展开研究,采集4个风化壳工程剖面29件样品进行稀土单元素定量分析。研究结果表明,在本区轻稀土矿体中存在重稀土矿体,一般隐伏赋存于轻稀土矿层下部,少部分呈单个独立重稀土矿体存在。其矿床成因是母岩表生淋滤作用充分彻底的情况下,稀土元素在风化壳中发生垂向分异,使重稀土在全风化层下部得到局部富集。清溪岩体重稀土矿层的发现,对寻找重稀土资源具有重要意义,因该类型重稀土矿成矿母岩规模大、分布广,而具有巨大的资源潜力,也为今后寻找重稀土矿床指明了新的找矿方向。

Geological Characteristics and Heavy Rare Earth Ore Prospecting Potential of Qingxi Pluton Rare Earth Deposit

South Jiangxi is the main producing area of heavy rare earth in China.The Zudong type heavy REE deposit is more strictly controlled by the parent rock,and as a reslut its prospecting space is limited.In order to find the new prospecting direction of heavy rare earth ore,this paper has studied the Qingxi pluton in South Jiangxi and collected 29 samples in 4 weathering crust project sections to carry out the quantitative analyses of the rare earth elements.The results show that there are heavy rare earth sub-orebodies within the light rare earth orebodies in this area,and heavy rare earth sub-orebodies usually exist in the lower part of the light rare earth ore layer.The formation of the heavy rare earth orebodies resulted from the vertical differentiation of rare earths in the weathering crust because of well weathering and leaching of parent rock.The discovery of the heavy rare earth ore layers in Qingxi pluton is of great significance for the search for heavy rare earth resources.The heavy rare earth ore is large and widely distributed,and has great resource potential.It also indicates a new prospecting direction for the future search of heavy rare earth deposits.