摘要
粤北泥盆系喷流沉积型硫化物矿床的稀土元素组成具有富轻稀土、铕正异常、铈正(或负)异常的特点,其页岩标准化模式可以与现代大洋中脊含金属沉积物的稀土元素模式类比,根据∑REE或δCe的变化特点可划分出三种类型。不同成矿特点的喷流沉积矿床稀土元素组成表现出较大差异,三类稀土元素组成实际代表了三种喷流沉积成矿方式。综合粤北喷流沉积型矿床地质地球化学特征,喷流沉积矿床可划分为原地堆积型、异地富集型及过渡型。
The REE'S composition of the Devonian exhalitive-sedimentary sulfide deposits in northern Guangdong Province is characterized by rich in light REEs, positive Eu anomalies and Ce anomalies, similar to that of the metalliferous sediments in modern mid-oceanic ridges(MOR). Comparative study shows that the REE' s distribution patterns of the exhalitive-sedimentary sulfide deposits are of three types: (1)low **REE with strong positive Eu anomalies and moderate positive Ce anomalies; (2)high ΣREE with moderate positive anomalies and moderate negative Ce anomalies and (3)moderateΣREE with slight positive Eu anomalies and indistinct positive Ce anomalies. These REE distribution patterns respectively represent three metallogenic models: autochthonous deposition, allochthonous deposition and transitional type.
出处
《华南地质与矿产》
CAS
1998年第1期26-31,共6页
Geology and Mineral Resources of South China
基金
属地质矿产部"八五"重点地质攻关项目的专题85-01-007-02-3
中国科学院矿床地球化学开放研究实验室资助课题192996829的部分研究成果
关键词
稀土元素
铕
铈
异常
喷流沉积矿床
泥盆系
硫化物矿床
矿床地质
REE geochemistry positive Eu anomalies Ce anomalies exhalitive-sedi-mentary deposit northern Guangdong
