Research Article
Radiogenic Lead with Dominant Content of 208Pb: New Coolant and Neutron Moderator for Innovative Nuclear Facilities
Table 8
Main deposits of uranium, thorium, and mixed uranium-thorium ores. Elemental compositions of minerals and isotope compositions of radiogenic lead.
| Deposit | U/Th/Pb (wt.%) | 204Pb/206Pb/207Pb/208Pb (at.%) | Age, 109 years |
| Monazite (Guarapari, Brazil) | 1.3/59.3/1.5 | 0.005/6.03/0.46/93.5 | 0.52–0.55 | Monazite (Manitoba, Canada) | 0.3/15.6/1.5 | 0.010/10.2/1.86/87.9 | 1.83–3.18 | Monazite (Mt. Isa Mine, Australia) | 0.0/5.73/0.3 | 0.038/5.44/0.97/93.6 | 1.00–1.19 | Monazite (Las Vegas, USA) | 0.1/9.39/0.4 | 0.025/9.07/1.13/89.8 | 0.77–1.73 | Uraninite (Singar Mine, India) | 64.3/8.1/8.9 | —/89.4/6.44/4.18 | 0.885 | Monazite (South Bug, Ukraine) | 0.2/8.72/0.9 | 0.010/6.04/0.94/93.0 | 1.8–2.0 |
|
|