稳定同位素和放射性同位素方法在铀矿水化找矿中的应用

在水文地球化学找矿研究中,采用稳定同位素和放射性同泣素方法判别放射性水异常及其成圈是一个重要的课题。在宝昌盆地采用氢氧同位素及氚的研究确定了3种类型的地下水异常。它们是:(1)局部淋滤富集和蒸发浓缩作用形成;(2)铀矿化引起的异常水;(3)深部与浅部水的混合作用形成。异常水的补给高程估计为1796m。异常地下水中~(234)U的过剩显示了矿化存在的可能性。同位素水文学的研究为水文地球化学找铀提出了一个新的方向。

THE APPLICATION OF STABLE ISOTOPES AND RADIOISOTOPES TO THE RADIOACTIVE HYDROGEOCHEMICAL PROSPECTING FOR URANIUM

The study of stable isotopes and radioisotopes was conducted for recognizing radioactive water anomalies and their origin during the uranium hydrogeochemical prospecting, which is considered as an important problem for study. Three types of groundwater anomalies were determined, namely(1) local enrichment by leaching and evaporation;(2) water anomalies caused by uranium mineralization;(3) mixing of shallow water and deep-seated water, through the study of hydrogen and oxygen isotopes and tritium determination in Baoehang area. And the altitute of recharge area was estimated to be 1796 meters. The excess of U-234 in groundwater indicates the possibility Of uranium mineralization. The study of the isotope hydrology gives a new approach for the radioactive hydrogeochemical prospecting tor uranium.