黔中-渝南铝土矿含矿岩系稀土元素地球化学特征  

Geochemical Characteristics of REE in Ore-bearing Rock Series of Central Guizhou and South Chongqing

作　　者：刘平[1] 廖友常[1] 韩忠华[1] 聂坤[1] LIU Ping;LIAO You-chang;HAN Zhong-hua;LIE Kun(106 Geological Party,Guizhou Bureau of Geology and Mineral Exploration and Development,Zunyi 563000,Guizhou,China)

机构地区：[1]贵州省地质矿产勘查开发局106地质大队,贵州遵义563000

出　　处：《贵州地质》2019年第1期1-9,共9页Guizhou Geology

摘　　要：黔中-渝南成矿带内,不同沉积环境形成的铝土矿含矿岩系,其岩石组合与REE特征有着明显差别。各沉积区铝土矿、黏土岩的∑Ce/∑y均大于1,皆以轻稀土为主。修文沉积区铝土矿、黏土岩的∑REE含量最多,重稀土相对含量最少,息烽-遵义沉积区的则均次之,黔北沉积区的铝土矿、黏土岩中∑REE含量最少,重稀土相对含量最多。区内铝土矿特殊稀土(TSE)含量排序为Ho>Eu>Tb>Tm>Lu,黏土岩的TSE含量排序多为Eu>Ho>Tb>Tm>Lu,与国内外各时代页岩一致。这些特征均与下伏基底岩石有密切的成因联系。修文沉积区九架炉组铝土矿含矿岩系的母岩,是寒武系碳酸盐岩与下奥陶统页岩、白云岩、灰岩;息烽-遵义沉积区九架炉组铝土矿含矿岩系的母岩,是下奥陶统页岩、白云岩和灰岩;黔北沉积区大竹园组铝土矿含矿岩系的母岩,则是下志留统页岩与上石炭统灰岩。各沉积区铝土矿、黏土岩REE特征与下伏母岩REE特征相似,它们之间可能具有继承性规律,因而可以追踪到铝土矿含矿岩系的物质来源。In the relative content of heavy rare earth is the least,the sedimentary areas of Xof ifeng Zunyi are the second,The content ∑REE in the bauxite and clay rocks in the sedimentary area of Northern Guizhou is the least,the relative content of heary rareearth is the most.These characteristics are closely related to the underlying bges at homeand aasement rocks.The order of content of special rare earth(TSE) in bauxite is Ho>Eu>Tb>Terent am>Lu,the order of TSE content of clay rock is Eu>Ho>Tb>Tm>Lu,which is consistent with the shale of different ages at home and abroad.

关 键 词：稀土元素 地球化学 铝土矿 含矿岩系 黔中-渝南 

分 类 号：P618.45[天文地球—矿床学] P595[天文地球—地质学]