地幔流体与铀成矿模式

Mantle geofluid and uranium ore-formation model

近年来的研究显示,火山岩型和花岗岩型铀矿具有早、晚两期铀矿化,其中早期铀矿化具有地幔流体成矿作用的特征。本文讨论了地幔流体及其成矿作用以及早期铀矿化的特征,提出了地幔流体铀成矿模式,强调构成成矿热液主体的∑CO2、U和H2O分别来自不同的源区,∑CO2来自地幔流体,U主要来自地幔流体上升途径的围岩,H2O主要来自地幔流体及其上升途径的围岩。

Results of the recent research show that volcanic-type and granite-type uranium deposits have both early and late phases of uranium mineralization,and the early phase uranium mineralization is characterized by metallogenetic features of mantle fluids.This paper discusses the geofluids and related metallogenesis,as well as characteristics of early phase uranium mineralilation,and emphasizes,that the ∑CO_2、U and H_2O,that comprise the bulk of the ore-forming hot fluids,are originated from different sources,namely CO_2 comes from mantle fluids,U comes from country rocks the mantle fluids have passed during their ascending way,and H_2O comes from mantle fluids and country rocks the mantle fluids have passed during their ascending way.