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首页> 外文期刊>CIM Bulletin >Mineralogical and process controls on the oxidative acid-leaching of radioactive phases in Elliot Lake, Ontario, uranium ores: II - Brannerite and allied titaniferous assemblages
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Mineralogical and process controls on the oxidative acid-leaching of radioactive phases in Elliot Lake, Ontario, uranium ores: II - Brannerite and allied titaniferous assemblages

机译：铀矿石中安大略省艾略特湖，铀矿石中放射性相氧化酸浸的矿物学和过程控制：II-褐铁矿和相关的钛铁矿组合

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摘要

In representative, run-of -mine samples from the Panel and New Quirke mines of the Elliot Lake uranium district, Ontario, brannerite, a metamict uranous titanate, occurs in microscopic grain-aggregates shish display wide variations, both in textural habit and in the relative propor-tions of brannerite, titania polymorphs and/or "uraniferous titania". As is widely documented, much of the brannerite occurs as trellis-like arrays of laths and needles pseudomorphing rutile or anatase. In some pseudomorphing rutile or anatase. In some cases, the laths and needles are cemented by coffinite. Brannerite, with an aver-age composition of (U_(0.629) Th_(0.039) Ca_(0.20))(Ti_(2.199) Fe_(0.13)) O_(69) contains <=3 wt percent The and is distinctly Ti-rich relative to the ideal composition, Uti_2O_6. Much of the Si reporting consistently in electron microprobe analyses (between 1 wt percent and 5 wt percent) is tentatively attributed to contamina-tion by the quartz-sericite matrix, and a minor pro-portion is attributed to the presence of coffinite intergrowths. "Uraniferous titania" (average partial composition by weight: 10.8 percent U, 0.3 percent Th, 32.9 percent Ti) is considered to represent an intermedi-ate stage in the conversion of titania to brannerite.The leaching behaviour of brannerite in its different modes of occurrence was studied qualitatively by the rotating-disc (polished section)
机译：代表性的是，安大略省埃利奥特湖铀矿区的Panel和New Quirke矿山的原矿样品中，褐铁矿（一种微量的钛酸钛酸盐）存在于微观的粒状骨料中，在质地习惯和矿物质习性上都有很大的差异。褐铁矿，二氧化钛多晶型物和/或“铀二氧化钛”的相对比例。如广泛记载的那样，许多褐铁矿以格子状的板条和针状排列出现，伪造金红石或锐钛矿。在某些伪变形金红石或锐钛矿中。在某些情况下，板条和机针通过coffinite粘结。褐铁矿的平均组成为（U_（0.629）Th_（0.039）Ca_（0.20））（Ti_（2.199）Fe_（0.13））O_（69）含量≤3％，并且明显富含Ti相对于理想成分Uti_2O_6。在电子探针分析中一致报告的大部分Si（介于1 wt％和5 wt％之间）暂时归因于石英绢云母基质的污染，而次要比例归因于存在有限共生。 “铀二氧化钛”（按重量计的平均部分组成：10.8％的U，0.3％的Th，32.9％的Ti）代表了二氧化钛向褐铁矿转化的中间阶段。褐铁矿在其不同模式下的浸出行为通过旋转盘（抛光部分）定性研究了发生

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