该文研究了桂东北地区三种不同类型铀矿床中沥青铀矿及其围岩的稀土元素分布模式。
The distribution patterns of rare earth elements of pitchblende and surrounding rocks in three types of uranium deposits have been studied.
稀土元素分布模式与华北晚古生代沉积的特征是一致的，表明煤样稀土元素分布模式是由源岩继承下来的。
The distribution pattern of REE is in accordance with the characteristic of Late Paleozoic sediments in North China platform, reflecting that it is inherited from the source rock.
根据稀土元素含量、有关参数及分布模式，将矿区萤石分为LREE富集型、LREE平坦型和LREE亏损型三种。
According to REE contents, parameters and distribution patterns, the fluorites in the ore field are classified into LREE rich, LREE plane and LREE loss types.
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