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地质学报  2003 

层间氧带砂岩型铀矿床的铁物相特征及其地球化学意义――以伊犁盆地511铀矿床和吐哈盆地十红滩铀矿床为例

, PP. 120-125

Keywords: 层间氧化带砂岩型铀矿床铁物相地球化学黄铁矿菱铁矿

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Abstract:

层间氧化带砂岩型铀矿床在空间上与层间氧化带各亚型的分布具有严格的对应关系。铁元素的物相特征是所处地球化学环境变化的敏感标志,FeFe2O3/TFe,Fe(FeCO3FeS2)/TFe,FeFe2O3/Fe(FeCO3FeS2)等比值是反映地球环境变化的重要指标,应用铁物相特征及其以上比值,可以简捷地对层间氧化带进行亚带的划分,这对指导铀矿勘查具有重要理论和实践意义,过渡带中菱铁矿(FeCO3)和黄铁矿(FeS2)等对地球化学环境敏感的矿物的富集,指示了有利于铀成矿的中性-弱酸性,还原的地球化学环境。

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