从铀系列同位素角度探讨砂岩型铀矿的形成过程及找矿标志

A Study of the Formation Process and Ore-Prospecting Indicators of the Sandstone Type Uranium Deposits in the Light of Uranium Series Isotopes

本文通过对512矿床含矿层不同地段铀系列同位素研究,对砂岩型铀矿的形成过程及找矿标志进行了探讨,根据矿卷前锋铀系列同位素组成分布规律和含矿层不同氧化还原分带中样品铀系列同位素分布特征,认为砂岩型铀矿含矿层岩石的铀系列同位素组成分区特征不仅可以记录铀富集的滚动成矿过程,而且可以作为预测铀矿化的重要找矿标志依据,A区应定名为“氧化还原矛盾区”较为合适。

Based on a study of uranium series isotopes in uranium-bearing strata from different sectors of the No. 512 depcsits, this paper deals with the formation process of sandstone type uranium deposits. According to distribution regularities of the compositions of uranium series isotopes in front of the ore roll and characteristics of isotope samples from different oxidation-reduction zones, the authors hold that the distribution of uranium series isotopes can not only be used to predict the location of the uranium ore body, but also be employed to study rolling mineralization of the roll in the process of the ore body formation. It is proper to name region A as the region of redox contradiction.