地质与勘探2012，Vol.48Issue(6)：1101-1108,8.
甘肃龙首山地区芨岭铀矿床隐爆角砾岩发现及成因探讨
Discovery of Cryptoexplosive Breccias in the Jiling Uranium Deposit of the Longshoushan Area,Gansu Province and Their Genesis
摘要
Abstract
Alkali -metasomatic type uranium deposits arc an important ore type in the Longshoushan area,Gansu Province. These deposits occur in hydrothermal cryptoexplosive sodium - metasomatism breccias, and are controlled hy the nearly EW - trending faults and their branching faults in the Longshoushan area,with a zonal distribution,comprising irregular breccia zones. On geological cross -sections,the breccias exhibit a canister or funnel shape, which exert a key control on the orebody distribution. Their genesis can be described by the following model: When gas - rich sodic fluids migrated from magma chambers,the pressure declined significantly and uutbursting happened so as to form the cryptoexplosive breccias. Carbonicuranium complex ( [ [UO2 ( CO3 ) ]^ 4 - ) decomposed and precipitated into ore minerals, and county rocks experienced albitization, chloritization, carbonatation, hematiiization, argillization and silication. This metallogenic model proposed may have guidanee significance tor the next prospecting of crytu - explosive breccia uranimn in this area.关键词
钠交代/隐爆角砾岩/成因/芨岭铀矿床/龙首山Key words
alkali - metasomatite/cryto - explosive breccia/genesis/Jiling uranium deposit/Longshoushan area分类
天文与地球科学引用本文复制引用
陈云杰,赵如意,武彬..甘肃龙首山地区芨岭铀矿床隐爆角砾岩发现及成因探讨[J].地质与勘探,2012,48(6):1101-1108,8.基金项目
[基金项目]核工业地质局铀矿地质项目（任务书编号：2010-56）资助. （）
