云南大理峨眉山玄武岩风化壳中发现钪(Sc)异常富集  

Abnormally enrichment of scandium in weathering crust of the Emeishan Basalt in Dali,central Yunnan

作　　者：王小蕊 杨瑞东[1,2] 陈蓉[3] WANG Xiaorui;YANG Ruidong;CHEN Rong(College of Resources and Environmental Engineering,Guizhou University,Guiyang,550025;Key Laboratory of Karst Geological Resources and Environment,Ministry of Education,Guizhou University,Guiyang,550025;Mining College of Guizhou University,Guiyang,550025)

机构地区：[1]贵州大学资源与环境工程学院,贵阳550025 [2]贵州大学喀斯特地质资源与环境教育部重点实验室,贵阳550025 [3]贵州大学矿业学院,贵阳550025

出　　处：《地质论评》2024年第5期2024-2030,共7页Geological Review

基　　金：国家自然科学基金资助项目(编号:U23A2027)的成果。

摘　　要：钪(Sc)及其化合物性能优异,在我国科技军事等领域得到广泛应用,被列为我国战略性矿产。在云南大理峨眉山玄武岩风化壳中发现Sc异常富集,其平均含量为43.7μg/g,相当于钪氧化物(Sc_(2)O_(3))含量为67.01μg/g,其中玄武岩风化形成的红褐色黏土层中Sc_(2)O_(3)含量更高,平均值为81.31μg/g,达到独立钪矿品位。对Sc富集机理初步分析发现,来自母岩的Sc在风化过程中因迁移能力较低,在风化产物中相对富集。峨眉山玄武岩在云、贵、川分布广泛,玄武岩风化壳是潜在的Sc矿找矿方向。Scandium(Sc)and its compounds have been widely used in scientific,technology and military fields due to the excellent properties,thus Sc has been listed as strategic mineral resource in China.The Sc was found enriched in the weathering crust of the Emeishan basalt in Dali,Yunnan Province,specifically,the average content of Sc is 43.7μg/g,which is equivalent to scandium oxide(Sc_(2)O_(3))of 67.01μg/g.The content of Sc_(2)O_(3)in the reddish-brown clay layer within the weathering crust is relatively higher at 81.31μg/g,which reaches the industrial grade of Sc deposit.Sc derived from the parent rock Emeishan basalt is enriched in the weathering products probably due to its low migration ability in the weathering process.Since the Emeishan basalt distributes widely in the Yunnan,Guizhou and Sichuan area,SW China,the Sc-rich basalt weathering crust may become a potential Sc source.

关 键 词：钪 风化壳 峨眉山玄武岩 云南大理 

分 类 号：P618.73[天文地球—矿床学]