广西热水沉积矿床中重晶石岩地质地球化学特征  

Geological and geochemical characteristics of the barite rocks in the hydrothermal sedimentary deposit in Guangxi

作　　者：王明艳[1,2] 息朝庄[3] 李毅[3] 

机构地区：[1]中国地质科学院矿产资源研究所,北京100037 [2]湖南有色金属控股集团矿产资源部,长沙410015 [3]中南大学地学与环境工程学院,长沙410083

出　　处：《矿产与地质》2008年第4期335-341,共7页Mineral Resources and Geology

基　　金：973项目(编号2002CG412607);国家科技攻关项目(编号2004BA615-02);湖南省自然科学基金(编号07JJ6071)联合资助的成果

摘　　要：文章从岩石学和地球化学角度,研究广西热水沉积矿床中重晶石岩的地质地球化学特征。重结晶岩在Al/(Al+Fe+Mn)和Al-Fe-Mn图解上的坐标落在热水沉积区内,为热水沉积形成。区内As、Sb的含量与热水沉积物中As、Sb的含量接近,表现出热水沉积作用的特征。重晶石岩的稀土分配模式具有轻稀土富集,弱的负Ce异常和强正Eu异常特征,为典型的热水沉积物的分布模式。It has researched geological and geochemical characteristics of the barite rocks in Guangxi hydrothermal sedimentary deposit based on lithology and geochemistry. In Al/（Al＋Fe＋Mn） and Al-Fe-Mn diagrams, the barite rocks＇ coordinates lie in the area of hydrothermal sediment, which means the rocks were formed by hydrothermal deposition. The As, Sb content of this area is close to that of hydrothermal sediment which presents the characteristics of hydrothermal deposition. The REE pattern of the barite rocks is a typical hydrothermal sedimentary distribution pattern with LREE enriched, weak negative Ce anomalies and stong positive Eu anomalies.

关 键 词：重晶石岩 热水沉积矿床 地球化学 广西 

分 类 号：P619.251[天文地球—矿床学]