201富铀矿床氢,氧,碳,硫,铅同位素研究

产于花岗岩中的２０１铀矿床是我国花岗岩型铀矿富矿之一。本文通过氢、氧、碳、硫、铅同位素组成的研究，探讨成矿溶液和成矿物质的来源，推测成矿环境。研究结果表明，该矿床成矿流体是以大气降水为主，主要成矿物质来自前燕山期花岗岩体，可能部分来自下部地壳，成矿作用是在较稳定的物化条件下进行。

A STUDY ON HYDROGEN,OXYGEN,CARBON,SULFUR AND LEAD ISOTOPES IN THE RICH URANIUM DEPOSIT NO. 201

The uranium deposit No. 201 located in Indosinian granite is one of the richest uraniumdeposits of granite type in China. An attempt is made in this paper to investigate the sourcesof ore-forming solutions and ore-forming materials,and to presume the environment of oreformation in the light of the study on composition of stable isotopes such as hydrogen,oxygen,carbon,sulfur and lead. The study results indicate that the ore-forming fluids in the deposit is mainly composed of meteoric water,the ore-forming materials principally came frompre-Yanshanian granite massif and possibly,partly from the lower crust,and metallogenesiswas undertaken under relatively stable physicochemical conditions.