砂金样品则以较富集轻稀土为特征，稀土元素含量继承了岩金的部分特点。
Placer gold samples are rich in light REE, the characteristics of REE contents of which partly inherited from hard rock gold.
结果发现稀土元素在铜矿冶炼过程主要富集在炼渣中，金属铜中的稀土元素含量很低。
The result of this study reveals that REE are concentrated in slag mainly during the smelting process, and total content of REE in the copper ingots is very low.
对黑龙江省84个砂金样品及7个岩金样品，用等离子质谱仪分析了它们的稀土元素含量。
The REE contents of 84 placer gold samples and 7 hard rock gold samples in Heilongjiang province are determined by plasma mass spectrographic analysis.
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