西秦岭铀矿床热液石英Pb同位素组成及其应用

作者分析了西秦岭地区各类岩石、花岗岩、含铀黄铁矿及早阶段热液石英Ｐｂ同位素组成，并将热液石英Ｐｂ同位素组成作为联系母源Ｐｂ与矿床Ｐｂ同位素组成的桥梁，与母源Ｐｂ及矿床Ｐｂ同位素组成进行了对比，花岗岩－石英－含铀黄铁矿Ｐｂ同位素组成具有线性演化关系，从而提出矿床中的铀来自隐伏构造－岩浆岩，而不是地层岩石。

Pb ISOTOPE COMPOSITIONS OF QUARTZ FORMING IN U-BEARING HYDROTHERMAL SOLUTION AND THEIR APPLICATION TO URANIUM DEPOSITS IN THE WESTERN QINLING

The author analysed the Pb isotope compositions of various rocks in strata, granite U-bearing pyrite and quartz forming in hydrothermal solution at the early stage of uranium deposits in the western Qinling and compared the Pb isotope ratios of the quartz with that of various rocks in strata,granite and pyrite,and regarded the Ph isotope ratios of quartz as a bridge that links.Pb isotope ratios of the mother-rock and ores. The result shows that Pb isotope ratios of the quartz, granite and pyrite eveloped a linear evolution. So the author advances a new viewpoint that U-source is provided by the blind U-rich granite rather than the rocks in strata.