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234U/238U Disequilibrium along stylolitic discontinuities in deep Mesozoic limestone formations of the Eastern Paris basin：evidence for discrete uranium mobility over the last 1–2 million years
uranium isotopes multiple-collector ICP-MS waste management remobilisation migration
2009/5/18
The (234U/238) equilibrium state of borehole core samples from the deep, low-permeability limestone formations surrounding the target argilite layer of the Meuse/Haute-Marne experimental site of the F...
234U/238U Disequilibrium along stylolitic discontinuities in deep Mesozoic limestone formations of the Eastern Paris basin: evidence for discrete uranium mobility over the last 1–2 million years
uranium isotopes multiple-collector ICP-MS waste management remobilisation migration
2009/3/3
The (234U/238) equilibrium state of borehole core samples from the deep, low-permeability limestone formations surrounding the target argilite layer of the Meuse/Haute-Marne experimental site of the F...
高分辨电感耦合等离子体质谱法测定铀矿石样品中234U/238U、230Th/232Th和228Ra/226Ra同位素比值
234U/238U 230Th/232Th 228Ra/226Ra 铀矿石 高分辨电感耦合等离子体质谱法
2014/6/16
采用氢氟酸-硝酸-盐酸混合酸密闭消解含铀矿石样品，用阴离子交换树脂、阳离子交换树脂和锶特效树脂逐级分离富集铀、钍和镭。使用高分辨电感耦合等离子体质谱(HR-ICPMS)测定分离纯化液中234U/238U、230Th/232Th和228Ra/226Ra同位素。比值的测量精密度取决于比值的大小和对应核素浓度的大小。对质量浓度为10 ng/mL 天然铀测量液，234U/238U的测量精密度优于1.2%；...
洞穴碳酸盐230Th-234U-238U测年初始钍校正的等时线研究
2007/12/12
Abstract初始钍的校正是不纯沉积碳酸盐230Th234U238U测年的一个重要方面，洞穴石笋初始Th校正通常采用230Th/232Th的原子比值为（4.4±2.2）×10-6。多年来4种不同的等时线方法应用到不纯碳酸盐测年初始Th的校正中，其中全样品的等时线方法是目前公认的较为完善的一种方法。通过测定云南同一石笋2个不同层位的9个样品的U、Th同位素组...