豫西地区铝土矿中镓的分布规律研究  

STUDY ON DISTRIBUTION LAWS OF GALLIUM IN BAUXITE DEPOSITS IN THE WESTERN AREA OF HENAN PROVINCE

作　　者：汤艳杰[1] 贾建业[1] 刘建朝[2] 

机构地区：[1]中国科学院广州地球化学研究所,广东广州510640 [2]长安大学地球科学系,陕西西安710054

出　　处：《矿物岩石》2002年第1期15-20,共6页Mineralogy and Petrology

摘　　要：镓是一种价格昂贵的稀散金属 ,其应用前景十分广阔。豫西地区的铝土矿石中含有丰富的镓资源。通过对区内铝土矿石中镓的分布特征做了多方面的对比研究 ,归纳出镓的分布规律 :空间上 ,在不同铝土矿区的矿石中镓的平均质量分数变化显著 ,在矿体平均厚度最大的张窑院矿区 ,矿石中的镓高度富集。时间上 ,沉积成矿相对较早的铝土矿层 ,因其长期遭受强烈的表生富集作用 ,矿石中镓的平均品位较高。从矿石结构类型来看 ,土状和峰窝状矿石中的镓品位明显高于豆、鲕状和致密状矿石。另外 ,矿石中镓平均含量的变化总与铝土矿富矿体的产出位置关系密切。并且 ,探讨了铝土矿中镓分布规律的控制因素。Gallium is one kind of rare and precious metal,and the prospect of its application is very bright.The average content of Gallium in bauxite ore is comparatively high in the western area of Henan Province.According to multilaterally comparative study,the distribution laws of gallium in the bauxite ores in the western area of Henan Province are summarized as follows.(1)Space distribution:The average contents of Gallium in bauxite ores vary considerably,and the highest content appears in the Zhang Yaoyuan ore area with the largest thickness;(2)Time distribution:Generally speaking,the earlier the bauxite ore bed is formed,the higher the average content of Gallium is;(3)Texture type of ore:The content of Gallium in ores with argillaceous and honeycomb structures is higher than those with pisolitic,oolitic structures and massive structure;(4)Ore shoot:The change of Gallium content in bauxite ore is related with the occurrence of ore shoots.In this paper the controlling factors of Gallium distribution laws have been studied.

关 键 词：豫西地区 铝土矿床 镓 分布规律 控制因素 表生富集作用 

分 类 号：P618.45[天文地球—矿床学] P618.74[天文地球—地质学]