Numbera | Â | Concentrations | Â | Atomic ratios | Â | Apparent ages | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | Weight (mg) | U | Pb total (ppm) | Pb nonradiation (pg) | Th/Ub | 206/204c | 207/206d, e | Error 2 s (%) | 207/235d, e | Error 2 s (%) | 206/238d | Error 2 s (%) | Correction | 206/238e | 207/235 | 207/206e |
Bi0428 | ||||||||||||||||
 0428-1 | 0.0082 | 161 | 0.87 | 0.66 | 0.52 | 657 | 0.04665 | 0.59 | 0.03277 | 0.63 | 0.00509 | 0.07 | 0.58 | 32.76 | 32.74 | 31.39 |
 0428-2 | 0.0043 | 233 | 7.75 | 0.94 | 0.28 | 2,235 | 0.05165 | 0.17 | 0.23489 | 0.19 | 0.03299 | 0.06 | 0.47 | 209.21 | 214.21 | 269.94 |
 0428-3 | 0.0040 | 49 | 0.27 | 1.04 | 0.55 | 92 | 0.04510 | 5.75 | 0.03255 | 6.12 | 0.00523 | 0.43 | 0.87 | 33.66 | 32.52 | −50.20 |
 0428-4 | 0.0044 | 409 | 2.16 | 2.16 | 0.46 | 284 | 0.04611 | 1.51 | 0.03252 | 1.61 | 0.00511 | 0.13 | 0.80 | 32.89 | 32.49 | 3.35 |
 0428-6 | 0.0034 | 53 | 1.47 | 0.57 | 0.19 | 584 | 0.05411 | 0.50 | 0.21118 | 0.55 | 0.02831 | 0.09 | 0.58 | 179.94 | 194.54 | 375.63 |
Bi0640 | ||||||||||||||||
 0640-1 | 0.0083 | 118 | 0.63 | 0.95 | 0.52 | 345 | 0.04659 | 1.52 | 0.03266 | 1.60 | 0.00508 | 0.13 | 0.64 | 32.69 | 32.64 | 28.30 |
 0640-2 | 0.0058 | 66 | 0.35 | 0.61 | 0.48 | 219 | 0.04580 | 2.23 | 0.03224 | 2.37 | 0.00510 | 0.18 | 0.80 | 32.82 | 32.21 | −12.89 |
 0640-4 | 0.0021 | 853 | 4.42 | 0.79 | 0.43 | 733 | 0.04674 | 0.55 | 0.03251 | 0.58 | 0.00505 | 0.07 | 0.55 | 32.44 | 32.48 | 35.97 |
 0640-6 | 0.0041 | 2,197 | 12.77 | 13.33 | 0.42 | 229 | 0.04648 | 0.91 | 0.03163 | 0.97 | 0.00494 | 0.09 | 0.74 | 31.74 | 31.62 | 22.58 |