摘要
诸广岩体南部的铀矿床均属大气降水中低温热液岩源活化改造型单铀矿床。稀土元素地球化学,包体和同位素的研究表明:贫、富矿成矿的基本地球化学条件相似;贫、富矿的根本不同点表现在富矿热液是富铀“浓流体”,而贫矿热液则是“稀溶液”;影响矿化贫富的重要因素是直接供铀条件的好坏,这方面富矿明显优于贫矿;富矿有比贫矿更为稳定和有利的成矿地球化学环境。
Uranium deposits in the southern part of Zhuguang Massif belong to those of single uranium type which were formed by meso-epithermal solutions of meteoric origin through mobilization and reworking of source rock. The study on REE geochemistry, inclusions and isotopes have shown that basic geochemical conditions for both rich and poor ore forming processes are similar; the fundamental difference between them is that rich ore-forming fluid is a'concentrated' one rich in uranium, while poor ore-forming fluid is a'diluted' one; the important factors affecting rich or poor ore-forming processes depend on the conditions of the direct uranium supply, and in this respect the conditions concerned for rich ores are obviously better than those for poor ones; rich ores have a more stable and favourable geochemical environment for ore formation than poor ones.
出处
《铀矿地质》
CSCD
北大核心
1989年第4期194-202,共9页
Uranium Geology
关键词
铀矿
成矿
地球化学
花岗岩型
Zhuguang massif, Granite-typc uranium deposit, Rich ote, Geochemical conditions
