一、区域地质及矿床地质该铀矿床位于华北地台西部的北西西向龙首山拱断带西段并产于侵入在早元古代龙首山群的伟晶状白岗岩岩体中。本区元古代地层包括龙首山群、墩子沟群和震旦系韩母山群。龙首山群是一套中深度变质的碎屑岩类以及碳酸盐夹基性火山岩夹层,如片岩、大理岩等,已知最大厚度为3600余米。作者通过对矿床围岩样品Rb-Sr等时线同位素分析结果得出, I. Regional Geology and Mineral Deposits The uranium deposit is located in the western section of the Longshanshan arch belt in the western part of North China Platform and is produced in the intrusive pegmatite-type granite in the Early Proterozoic Longsheshan Group. Proterozoic strata in this area include Longshenshan Group, Dunzigou Group and Sinian Hanmushan Group. Long Shou Shan Group is a set of deep metamorphic clastic rocks and carbonate sandstone intercalation volcanic intercalations, such as schist, marble, etc., the maximum known thickness of 3600 meters. Based on the isochronal isotopic analysis of Rb-Sr in the ore-bearing rock samples,