广东平远仁居—黄畲地区燕山晚期花岗岩类的地质地球化学特征

The Geological and Geochemical Characteristics of Late Yanshanian Granites in Renju-Huangshe Area,Pingyuan,Guangdong

平远仁居—黄畲地区燕山晚期黑云母花岗岩和花岗斑岩为本区风化壳稀土矿床的成矿母岩，与国内其它地区（以江西省为例）和国外（如英格兰）著名含稀土花岗岩相比，以富含轻稀土副矿物、岩石酸度较低、稀土总量和轻重稀土比值高以及铕含量高为特征．特别是本区黑云母花岗岩的稀土总量、轻重稀土比值和铕含量特别高，是形成本区风化壳富铕轻稀土矿床最重要的母岩．

The late Yanshanian granitite and granite-porphyry are source rocks ofweathering crust REE deposits in Renju-Huangshe area. They are characterized byabundant LREE-bearing accessory minerals,lower acidity, high LREE/HREE ratio andrich Eu content.The granitite is of especial large total amount of REE、hi8h LREE/HREE ratio and rich Eu content.It is the most important source rock of Eu-rich LREEdeposits in the area.