3110矿床成矿流体地球化学特征

通过对３１１０矿床不同成矿阶段石英流体包裹体成分的研究，阐述了该矿床成矿的物理化学环境。该矿床成矿流体来源于改造围岩的构造热液和大气降水混合。成矿流体中铀的迁移形式，矿前期为ＵＯ２（ＣＯ３）３＾４－（７７．４％）和ＵＯ２（ＣＯ３）２＾２－（２２．５％）；成矿期为ＵＯ２（ＣＯ３）２＾２－（９９．９％）；矿后期ＵＯ２（ＣＯ３）３＾４－（５４．４％）和ＵＯ２（ＣＯ３）２＾２－（４２．０％）。矿化是在混合

Geochemical Characteristics of Metallogenic Fluid in Uranium Deposit No.3110

Based on the study of the fluid inclusions composition of quartz in different mineralization stages of Uranium deposit No.3110, this paper discusses the mineralization physicochemical environment of this deposit. The metallogenic fluid of uranium deposit No.3110 is considered as deriving from the mixture of strucutre hydrotherm reworking the wall rock and atmospheric precipitation. The transportation patterns of uranium in earlier mineralization stage are UO 2(CO 3) 4- 3(77.4%) and UO 2(CO 3) 2- 3(22.5%), UO 2(CO 3) 2- 3(99.9%) in mineralization stage, and UO 2(CO 3) 4- 3(54.4%) and UO 2(CO 3) 2- 3(42.0%) in post mineralization stage. The uranium mineralization occurs when the mixture hydrotherm moves towards the fracture zone in bed , the T, pH, f O 2 and f S 2 are getting lower, the Eh is getting higher with the wall rock organic absorption and the reduction condition. The regional tectonic activity is of multistage feature. There are close relationship between uranium mineralization and early compression shear process, late stretch process. The structure provides the activate transportation of uranium, etc. metallogenic material with force resource, and controls the change of metallogenic environment and conditions. The uranium deposit is the polygentic type of structural control and stratabound uranium deposit.