摘要
选择赣南典型稀土矿区,即寻乌(以轻稀土为代表)、安远(以中稀土为代表)和龙南(以重稀土为代表)为研究区域,于生产期和停产期(停产后半年)分别采集了矿区上游、矿区淋滤废水、矿区山泉水、生活用井水、近矿支流、矿区下游等地表水共90件,分析了溶解态稀土元素在离子吸附型稀土矿区周边地表水中的含量、空间分布特征及影响因素。结果表明:稀土矿的开采对矿区周边地表水中DREE含量影响较大。此外,水粒作用、区域地质背景与风化作用、水化学因素都是影响离子吸附型稀土矿区周边水体DREE行为的主要因素。矿区周边地表水中稀土含量高是我国离子吸附型稀土矿山开采引发的特殊问题。
The study investigates the behavior of dissolved rare earth elements（DREE） in surface waters in the suburb area of typical ion-adsorption rare earth orefield in southern part of Jiangxi Province, where the typical REE deposits with different REE distribution patterns, ranging from primary light REE enrichment in residual clays from Xunwu town, through middle REE enrichment in residual clays from Anyuan town, to strong secondary heavy REE enrichment in residual clays from Longnan town were selected for surface water sampling. The DREE together with other major and minor components were determined in 90 different surface water samples from such as upstream, downstream, mine waste water, spring water in mine, well water, and small anabranch water of ion-adsorption rare earth orefield, sampled during the mining period and idling period. The temporal and spatial variations and behavior of DREEs, trace-element in surface water that drained from three typical types of ion-adsorption rare earth deposits and the main factors that control the REE geochemistry under the role of natural and anthropogenic anomalies were estimated. The result shows that mining is the main factor that influences the mass concentration of DREE in surface waters in the study area. Furthermore, wate-particle interaction, weathering and the background of tectonic geology and hydrochemical type are the other affecting factors that control the DREE geochemistry in the studied waters. High mass concentration of REE in the surface water in the suburb of rare earth orefield is the special issue caused by mining activity.
出处
《地学前缘》
EI
CAS
CSCD
北大核心
2017年第5期172-181,共10页
Earth Science Frontiers
基金
中国地质调查局地质大调查项目(DD20160056
DD20160055
1212011120354)
国家自然科学基金青年基金项目(41202254)
中央级公益性科研院所基本科研业务费专项资金资助项目(K1209)
关键词
稀土元素
稀土配分特征
离子吸附型稀土矿
地表水
影响因素
rare earth elements
REF. fractionation
ion-adsorption rare earth ore
surface water
impact factor
