典型文献
U-Blacks Mineralization in Sandstone Uranium Deposits
文献摘要：
Ores of infiltration sandstone-hosted uranium deposits in the sedimentary cover are ubiquitous composed of dispersed soot powder mineralization of black, brownish-black colour. Long-term studies of such loose U-ores by analytical transmission electron microscopy (ATEM) proved their polymineral nature. Uranium blacks are composed by at least three different U-mineral forms:oxide (uraninite), silicate (coffinite) and phosphate (ningyoite) which are present in various proportions of ore compositions. Such high dispersed friable uranium formations are difficult to diagnose by tradition-al mineralogical methods (optical, XRD, IR and X-ray spectroscopy, etc.) which analyze total sample composition (phases mixture); their results characterize the dominant sample phase, omitting both sharply subordinate and X-ray amorphous phases. All research results are based on ATEM methods (SAED+EDS), which are optimal for crystallochemical diagnostics in the mineralogical study of such uranium ores. The article presents the diagnostic characteristics under electron microscope (EM) of uranous minerals from different sandstone deposits with their origin being discussed.
文献关键词：
中图分类号：
作者姓名：
Olga A.Doynikova
作者机构：
Institute of Ore Deposits Geology,Petrography,Mineralogy and Geochemistry Russian Academy of Science,Moscow 119017,Russia
文献出处：
引用格式：
[1]Olga A.Doynikova-.U-Blacks Mineralization in Sandstone Uranium Deposits)[J].地球科学学刊（英文版）,2022(02):308-316
A类：
Blacks,Ores,ATEM,polymineral,uraninite,coffinite,ningyoite,friable,SAED+EDS,crystallochemical,uranous
B类：
Mineralization,Sandstone,Uranium,Deposits,infiltration,sandstone,hosted,uranium,deposits,sedimentary,cover,are,ubiquitous,composed,dispersed,soot,powder,mineralization,brownish,colour,Long,term,studies,such,loose,ores,by,analytical,transmission,electron,microscopy,proved,their,nature,blacks,least,three,different,forms,oxide,silicate,phosphate,which,various,proportions,compositions,Such,high,formations,difficult,diagnose,tradition,mineralogical,methods,optical,ray,spectroscopy,etc,analyze,total,sample,phases,mixture,results,characterize,dominant,omitting,both,sharply,subordinate,amorphous,All,research,optimal,diagnostics,study,article,presents,characteristics,under,microscope,minerals,from,origin,being,discussed
AB值：
0.55816
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