有机碳与微量元素成矿作用机理研究——以新疆511砂岩型铀矿床某号勘探线为例

Relationship Between Organic Carbon and Elements Mineralization——Taking one of Prospecting Line of 511 Uranium Deposit as example

为了探求有机碳与微量元素对成矿作用的影响,以新疆511砂岩型铀矿床某号勘探线为例对两者的关系进行了研究。511砂岩型铀矿床位于新疆伊犁盆地南缘,产于侏罗系水西沟群组含煤碎屑岩的沉积地层中。矿床受岩相、层间氧化带、水文地球化学等多种因素控制。在某勘探线的8个钻孔中采集到37个样品,并对样品进行了测定。利用相关系数对有机碳、微量元素和铀的富集规律做了分析。研究认为,矿化与有机碳密切相关,与成矿有关的有机碳主要是一种浅变质的植物碎屑。成矿元素铀、硒、铼等在层间氧化带各个亚带中的不均匀分布,主要与有机碳的氧化-还原程度有关。

To find the effect of organic carbon,trace elements on the mineralization,511 sandstone type uranium deposit was chosen as an example,which locates on the Southern Yili basin of Xinjiang,mineralized in Jurassic Shuixi Channel Group strata.The deposit controlled by such factors as lithofacies,interlayer oxidation,hydro-geochemistry,etc.37 samples collected from 8 drills of one section of 511 deposit,analyzed by authorized institution.With the data from experience,the correlation coefficient among organic carbon,S,Fe2 ＋and Fe3 ＋and uranium was calculated.The conclusion is that the mineralization has a direct relation with organic carbon which is one kind of Low-grade metamorphic plant scrap.The distribution of main elements as mineralization including uranium,selenium,rhenium are not even,mainly affected by the organic carbon oxidation-reduction.