摘要
本文应用Sr，Nd，Pb同位素演化示踪获得：华南各地区中生代火山岩的同位素演化受区域古陆（基底）变质岩、早期改造衍生体和再循环陆壳制约；铀成矿同位素组成具有地壳来源性。燕山期大陆边缘增生作用，导致陆内下地壳岩浆活动及拉张裂陷等地壳运动，促成铀的迁移富集成矿。
According to research on evolutionary tracer of Sr, Nd,Pb isotopes,this paper proposes that isotopic evolution of Mesozoic volcanics in south China is controlled by regionally metamorphic rocks of ancient land basement,early reformed derivates and recycled continental crust. Isotopic composition of uranium metallization shows the characteristics of crust sources,and Yanshanian accretion of continental margin caused the crust movements such as magmatic activity in lower crust within continent, extension-down-faulting, etc., promoting the migration, enrichment and oreformation of uranium.
出处
《铀矿地质》
CAS
CSCD
1998年第2期96-101,共6页
Uranium Geology
关键词
火山岩
铀矿床
矿床成矿
锶
钕
同位素演化规律
South China, Volcanic rocks, Uranium metallization, Isotopic evolutionary laws
