蒙其古尔铀矿床西山窑组下段岩性岩相特征

通过野外露头观察、岩心编录和测井资料等工作方法,结合连井相分析和砂体空间展布特征,对研究区西山窑组下段岩性岩相特征进行深入解剖。在分析研究区西山窑组下段岩性特征、砂体发育特征的基础上,结合伊犁盆地南缘沉积体系演化特征,认为西山窑组下段砂体的成层性、连通性、稳定性好、厚度适中、固结松散,为含矿流体运移和储矿提供了良好的储层空间;西山窑组下段以扇三角洲前缘相为主,形成两条NE向展布的稳定河道,水下分流河道向郎卡一带延伸入湖,形成扇三角洲前缘水下分流河道。水下分流河道和水下分流河道间两个微相的相变对铀成矿有重要的控制作用,铀矿体主要分布于扇三角洲前缘分流河道砂体中。

Characteristics of Lithofacies in the Lower Xishanyao Formation of the Mengqiguer Uranium Deposit

The lithologic facies characteristics of the study area were deeply dissected by field outcrop observation,core record and logging data,combined with well facies analysis and sand body spatial distribution characteristics.By analysising of the study area on the basis of lithological features,sand body development,combined with the feature of the southern margin of ili basin sedimentary system evolution, the next paragraph from the thought into a layer of sand body,connectivity, loose,good stability,moderate thickness,consolidation of ore fluid migration and ore provides good reservoir space;Xishanyao group under section is given priority to with fan delta front facies,forming two north east to the stability of the distribution channel,underwater distributary channel to lang card area extends into the lake,the formation of fan delta front underwater distributary channel,underwater distributary channel and distributary interchannel phase change of the two microfacies has a very important control action on uranium mineralization,the uranium ore body are mainly distributed in the distributary channel sand bodies of fan delta front.