地幔流体参与铀成矿作用的研究进展——以粤北花岗岩型铀矿矿集区为例

地幔流体与铀成矿作用问题,首先关注的是地幔是否也是铀源,并且成矿流体是否具有幔源性质。研究结果表明,地幔流体参与了大型铀矿床的成矿作用,它可以是铀源,也可以是直接成矿的流体。发生地幔流体成矿作用的构造环境是拉张构造区和深大断裂区,因而其具有幔源岩浆发育、成矿物质幔源性、形成大型矿床或矿集区、特定的稳定同位素组成范围等特征。粤北铀矿集区具有相似的构造环境和成矿特征,笔者为此提出几点建议。

Research Progress in Mantle Fluids Involved Uranium Metallization---A Case Study of Granite Type Uranium Deposit Cluster Area,Northern Guangdong

This paper focuses on the effect of mantle fluid on uranium metallization.Researcher first dis-cussed the homology of mantle and uranium source;and then studied the homogeneity of ore forming fluid and mantle source.Research results shew that mantle fluid can served as uranium source and ore forming fluid which participated in the metallogenesis of uranium.Tectonic setting of ore forming fluid includes tension zones and fractures zones of deep and large faults,which bear the characters of well de-veloped mantle source magmatism,mantle derived ore forming materials,large deposit or cluster of mineralization and specicial stable isotopic composition.The cluster area of North Guangdong is with the similar tectonic setting and therefore was believed favourable for uranium metallization.