贵东—诸广山地区是中国最为主要的花岗岩型铀矿聚集区,区内白垩纪中基性岩脉分布广泛。本文通过对中基性岩脉的空间展布、产状和岩石学特征的研究,结合岩石主量、微量、稀土元素和同位素分析,阐明了中基性岩脉的特征及其与铀成矿的关系。1地质背景与岩石学特征1·1中基性岩脉 The Guidong-Zhuangshan area is the most important granite-type uranium accumulation area in China. The Cretaceous intermediate-basic dykes are widely distributed in the area. Based on the study of the spatial distribution, occurrence and petrology of Mesozoic dykes, combined with the analysis of major, minor, REE and isotopic compositions of rocks, the paper expounds the characteristics of mid-basic dykes and their relationship with uranium mineralization Relationship. 1 Geological Background and Petrology Features 1.1 Mafic dikes