作　　者： ; ; ; ; ; ;

机构地区： 广东省有色金属地质勘查局地质勘查研究院广州510080

出　　处： 《资源调查与环境》 2009年第3期180-187,共8页

摘　　要： 湖南宁乡钾镁煌斑岩是寻找湖南原生金刚石矿床的重要线索之一。本文通过对宁乡号煌斑岩岩管岩石地球化学的分析及其与其它地区钾镁煌斑岩的对比,确定宁乡号岩管煌斑岩与前人所研究的宁乡钾镁煌斑岩特征基本一致。但与西澳典型含金刚石的钾镁煌斑岩相比,其SiO2、Al2O3、MnO的含量较高,MgO、TiO2、K2O含量较低,这可能与钾镁煌斑岩的岩浆来源及演化过程有关,显示其地幔源区来源相对于西澳钾镁煌斑岩的源区较为富集。 Lamproite in Ningxiang, Hunan province, is one of the main clues for prospecting original diamond deposits in Hunan. In this paper, according to the lithogeochemical analysis of the No. 5 pipe-like lamprophyre in Ningxiang and the compare with lamproites in other districts, it is believed that the characteristics of the No. 5 pipe-like lamprophyre are similar to those of the other lamproites in Ningxiang which have been researched and identified as a kind of lamproite by predecessors. Compared with typical diamondiferous lam- proites in Western Australia, the contents of SiO2, Al2O3 and MnO are higher and MgO, TiO2 and K2O are lower in the No. 5 pipe-like lamprophyre in Ningxiang, which may be related with the magma source and evolutionary process, showing that the mantle source of lamproite in Ningxiang is more enriched than that in Western Australia.

关 键 词： 煌斑岩 岩石地球化学 宁乡 湖南

领　　域： [天文地球] [天文地球]