An approach to the mathematical modelling of the uranium series redistribution within ore bodies. [Australia]
An approach to the mathematical modelling of the uranium series redistribution within ore bodies. [Australia]
复制标题
矿体内铀系再分布的数学建模方法。
DOI：
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发表时间：
1987
期刊：
影响因子：
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通讯作者：
D. Lever
中科院分区：
文献类型：
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作者：
P. Airey;C. Golian;D. Lever
通过简单的一维同位素迁移参数模型预测了 Koongarra 矿体中铀系同位素的分布。控制预测的是延迟因素和地下水流量。模拟的条件是地下水流量为每年 1 米，/sup 238/U 的延迟因子为 1 x 10/sup 4/，/sup 234/U 的延迟因子为 1.2 x 10/sup 4/，并且 /sup 230/Th 是固定的。对于这组条件，现场测量的同位素比率和“预测的”同位素比率之间观察到非常好的一致性。多相模型充分描述了矿体风化带中铀及其子体放射性核素的重新分布。它将U、Th和Ra同位素在水相、非晶铁相、结晶相以及粘土和石英相之间重新分配。 28 条参考文献、26 张图、8 个标签。
The distributions of the uranium series isotopes in the Koongarra ore body were predicted by a simple one-dimensional model of isotopic migration parameters. Controlling the predictions were the retardation factors and the groundwater flow rates. The conditions modelled were a groundwater flow rate of 1 meter per year, retardation factors of 1 x 10/sup 4/ for /sup 238/U and of 1.2 x 10/sup 4/ for /sup 234/U, and /sup 230/Th is immobile. For this set of conditions, an exceptionally good agreement was observed between field-measured isotope ratios and ''predicted'' isotope ratios. A multiphase model adequately describes the redistribution of uranium and daughter radionuclides in the weathered zone of the ore bodies. It redistributes U, Th and Ra isotopes among an aqueous phase, an amorphous iron phase, a crystalline phase and a phase of clay and quartz. 28 refs., 26 figs., 8 tabs.