次生蚀变 meaning in English

secondary alteration

Based on abundant statistic data and photographs of seeping - type uranium deposits at the southern margin of ili basin , detailed description is given of the oxidation - migration of organic matter during seeping of oxygen - bearing water , secondary alteration of minerals , and concentration of uranium and associated elements on geochemical reduction barriers as well as formation of secondary seeping uranium deposits
摘要采用伊犁盆地南缘渗入铀矿床中的大量统计数据、图片等资料，论述了在层间渗入型铀矿床中，有机质在含氧渗流水作用下，发生氧化迁移，岩石中的矿物次生蚀变，并在地球化学还原障上产生铀及伴生元素的富集，形成后生渗入铀矿床的过程。