重稀土元素

花岗岩体稀土元素总量∑REE变化于99.5×10-6～294.72×10-6之间，轻稀土元素富集，重稀土元素亏损，具弱至中等的负Eu异常。

The granite intrusion has ∑ REE values ranging from 99.5 to 294.72 × 10-6 and are enriched in LREE and depleted in HREE with weak to moderate negative anomalies .

轻稀土元素主要赋存于褐帘石和独居石中，重稀土元素主要赋存于褐钇铌矿等矿物中。

LREE are mainly in orthite and monazite , HREE are mainly in fergusonite etc.

这与赋矿围岩的岩石具有轻稀土元素富集、重稀土元素亏损，以及Eu、Ce略显亏损的特点相反。

It is contrary to the characteristics of host rock , namely light rare earth elements enrichment , heavy rare earth elements loss and slightly losses of Eu and Ce .

不同程度地富集大离子亲石元素和轻稀土元素，相对亏损重稀土元素，稀土元素分馏明显或比较明显，相容元素（Co、V、Cr、Ni）显著亏损。

They enrich in LILEs and LREEs at different degrees , and deplete relatively to HREEs , REEs fractionate evidently , compatible elements ( Co , V , Cr , Ni ) deplete significantly .

赣南特地区河水溶解态稀土元素页岩标准化配分模式并不平坦，重稀土元素相对轻微富集，并表现出Ce负异常和Eu正异常。

The shale-normalized river water-dissolved REE distribution patterns of the Ganjiang River in the southern Jiangxi Province are not flat and the HREEs are relatively slightly enriched , showing obvious Ce negative anomaly and Eu positive anomaly .

以EDTA作为淋洗剂，同时采用NH4+作排代剂，达到了用Cu2+作为延缓离子分离重稀土元素的目的。

It uses EDTA as drip washing agent and NH_4 as displacing agent so that Cu ~ ( 2 + ) can be used as delaying ions for separating heavy rare earths .

随着接近循环热液成矿体系的成矿中心和硅化不断增强，REE，LREE和HREE含量降低，轻和重稀土元素之间分异程度增强；

While circulatory hydrothermal ore-forming center approaches with continual enhancement of silification , REE , LREE and HREE decrease , and fractionation between LREE and HREE becomes high .

轻、重稀土元素比值（slree／shree）在上述两个时间段中分别为8.16和9.42，其变化趋势与∑ree的完全相同。

The ratios of SL REE / SH REE are 8.16 and 9.42 respectively in the two periods , and with the similar variation with Σ REE .

化学成分具SiO~2高和K2C>Na2O的特点，在尼格里四面体图解中，其成分点分布于火成岩与粘土沉积岩界线附近。富含重稀土元素Y和Yb。

Their chemical composition is characteristic of high SiO_2 content and K_2O > Na_2O , and in the Niggli 's tetrahedron classification diagram , their composition points concentrates near the boundary between igneous rock and clay sedimentary rock , and rich in heavy rare earth element Y and Yb .

重稀土元素的极谱吸附催化波研究

A Study of Polarographic Adsorption Catalytic Wave of Heavy Rare Earth Element

重稀土元素及Y也属于不活泼元素。

The heavy rare earth and Y also belong to immobile elements .

重稀土元素的高效离子交换色谱法分离及其定量测定

The Separation and Determination of Heavy Rare Earth Elements by High-Performance Ion Exchange Chromatography

碳酸岩的轻稀土元素高度富集，轻、重稀土元素之间发生了极度分馏，但无铕异常显示。

Light REE in carbonatites are extremely enriched and strongly fractionated relative to heavy REE , but without Eu anomaly .

稀土元素总量平均为219×10-6，轻稀土元素含量是重稀土元素含量的4.34倍。

Total Ree is about 219 × 10-6 , in which light Ree weight as 4.34 times as heavy ones .

自镨、钕中分离钐和镱。在锂汞齐电极电极上于柠檬酸溶液体系中，有利于制备各稀土元素的汞齐或有可能进行轻、重稀土元素之间的分组分离。

The preparation of rare earths amalgams and the separation between light and heavy rare earths are more available in lithium citrate electrolyte .

随着时代变新，玄武岩碱性逐渐增强，轻、重稀土元素分离程度及不相容元素富集程度也逐渐增强。

With the ages becoming younger of the basalts , their alkali , the fractional degree of LREE / HREE and incompatible elements enrichment increased .

轻稀土元素钕和重稀土元素镝用于制造风力涡轮机和电动车辆中的永磁体。

Neodymium , a light rare earth , and dysprosium , a heavy , are used in permanent magnets for wind turbines or electric vehicles .

铕、铽和钇均是重稀土元素。它们用于制造平板电子产品和节能灯泡，这些领域预计将出现强劲的需求增长。

Europium , terbium and yttrium , all heavies , are used in flatscreen electronics and energy-saving lightbulbs , areas projected to have strong demand growth .

发现稀土元素，尤其是重稀土元素对铀的区域富集及铀矿化作用有一定的指示意义。

It is discovered that REE , especially heavy rare earth elements ( HREE ) are of certain indicating significance for uranium transportation , enrichment and exploration .

研究表明玄武岩首先风化形成蒙皂石族粘土矿物，在此过程中稀土元素没有明显的分馏作用，强风化的玄武岩重稀土元素强烈亏损；

It is concluded that the half - weathered basalts have not distinct REE fractionation and strong weathered basalts had HREE loss in the process of the basalts weathered to form smectite family minerals .