243 / 352
207
Pb
a
U
b
Pb
b
Th
b 206
Pbc
c 207
Pb
d
±2s
206
Pb
d
±2s ȡ
e
207
Pb
d
±2s
206
Pb
f
±2s
207
Pb
f
±2s
207
Pb
f
±2s Conc.
g
(cps) (ppm) (ppm)
U (%)
235
U (%)
238
U (%) (rho)
206
Pb (%)
238
U (Ma)
235
U (Ma)
206
Pb (Ma) (%)
Grain
A211 79151 137 76 0.91 b.d.
11.14 1.0 0.4585 0.7 0.71 0.1762 0.7 2433 15 2535 10 2618 12 93
A354 157284 260 142 0.64 b.d.
11.55 0.9 0.4766 0.7 0.78 0.1758 0.6 2513 15 2569 9 2614 10 96
A258 20215 35 21 1.35 b.d.
11.56 1.4 0.4646 0.9 0.61 0.1805 1.1 2460 18 2570 14 2657 19 93
A319 24669 45 26 0.89 0.1 11.56 1.5 0.4791 1.1 0.71 0.1751 1.0 2523 22 2570 14 2607 17 97
A341 124207 428 223 0.26 0.2 11.84 0.9 0.4855 0.6 0.71 0.1769 0.6 2551 14 2592 9 2624 11 97
A356 204509 332 205 1.27 b.d.
11.85 0.9 0.4847 0.7 0.77 0.1773 0.6 2548 15 2593 9 2628 10 97
A327 21627 68 43 1.38 0.2 12.09 1.4 0.4857 0.9 0.66 0.1805 1.0 2552 19 2611 13 2657 17 96
A219 86675 143 85 0.88 b.d.
12.09 1.0 0.4995 0.7 0.70 0.1755 0.7 2612 14 2611 9 2611 11 100
A336 19282 30 20 1.73 0.0 12.20 1.3 0.4883 0.8 0.63 0.1812 1.0 2563 17 2620 12 2664 17 96
A335 34114 108 68 1.22 b.d.
12.36 1.1 0.5022 0.8 0.69 0.1785 0.8 2623 17 2632 11 2639 14 99
A217 238893 384 200 0.06 0.1 12.38 1.1 0.5020 0.9 0.86 0.1789 0.6 2622 20 2634 10 2642 9 99
A269 148016 243 145 0.83 0.1 12.41 0.9 0.5062 0.7 0.75 0.1777 0.6 2640 15 2636 9 2632 10 100
A223 47848 150 113 2.31 b.d.
12.46 0.9 0.5041 0.7 0.74 0.1793 0.6 2631 15 2640 9 2646 10 99
A183 215331 343 193 0.52 b.d.
12.63 1.1 0.4991 0.9 0.85 0.1836 0.6 2610 20 2653 10 2685 9 97
A275 69929 230 132 0.59 0.0 12.91 1.3 0.5016 1.0 0.75 0.1866 0.9 2621 21 2673 12 2713 14 97
A290 73196 111 67 0.87 b.d.
12.93 1.0 0.5044 0.7 0.77 0.1859 0.6 2633 16 2675 9 2707 10 97
A289 31517 48 28 0.67 0.1 13.01 1.2 0.5113 0.9 0.72 0.1845 0.8 2662 19 2680 11 2694 14 99
A186 35846 56 37 1.60 b.d.
13.03 1.4 0.4932 0.8 0.61 0.1917 1.1 2584 18 2682 13 2757 18 94
A254 82453 251 150 0.63 0.0 13.32 1.0 0.5203 0.7 0.76 0.1857 0.6 2700 17 2703 9 2704 11 100
A264 27444 39 26 1.26 b.d.
14.07 1.2 0.5231 0.8 0.65 0.1951 0.9 2712 17 2754 11 2785 15 97
A272 141799 187 139 1.70 0.1 15.04 0.9 0.5409 0.7 0.81 0.2017 0.5 2787 17 2818 9 2840 9 98
A338 53075 69 41 0.42 0.0 15.21 1.1 0.5338 0.9 0.80 0.2067 0.7 2758 20 2829 11 2880 11 96
A251 163799 221 146 0.99 0.0 15.48 0.9 0.5400 0.7 0.74 0.2079 0.6 2783 15 2845 9 2889 10 96
A282 35574 44 31 1.21 0.0 15.83 1.2 0.5412 0.8 0.64 0.2122 0.9 2788 18 2867 12 2923 15 95
A214
-70
3
117 b.d.
A358
17
1
0.13 b.d.
A350 28018 355 4 0.07 0.0 0.1108 24.6 0.00830 24 0.98 0.09676 5.5 53 13 107 25 1563 102 3
A201
2646 65 6 1.00 1.6 0.6687 4.7 0.08000 1.5 0.33 0.06062 4.4 496 7 520 19 626 95 79
A218
524 19 2 0.72 0.0 0.6229 4.6 0.08137 1.7 0.36 0.05552 4.2 504 8 492 18 433 95 116
A293
1213 35 3 0.99 b.d.
0.7074 3.9 0.08401 1.0 0.26 0.06107 3.8 520 5 543 17 642 81 81
A203
1423 40 4 0.74 b.d.
0.7451 3.5 0.08747 1.2 0.35 0.06178 3.3 541 6 565 15 667 71 81
A353
1086 63 6 0.63 b.d.
0.7594 3.2 0.08750 0.9 0.29 0.06295 3.1 541 5 574 14 706 66 77
A226
3132 27 3 0.62 12.4 1.2030 10.7 0.08831 3.2 0.30 0.09878 10.3 546 17 802 61 1601 191 34
A205 24078 510 43 0.14 b.d.
0.9268 1.4 0.08864 0.8 0.61 0.07583 1.1 548 4 666 7 1090 22 50
A359
395 9
1 1.40 0.0 0.8150 5.4 0.09093 2.0 0.38 0.06501 5.0 561 11 605 25 775 106 72
A180
347 19 2 0.38 1.3 0.6381 10.3 0.09874 2.4 0.24 0.04687 10.0 607 14 501 41 43 239 1424
A365 82690 226 54 0.28 1.3 4.467 2.2 0.2082 1.6 0.73 0.1556 1.5 1219 18 1725 19 2408 26 51
A346
1340 5
1 0.21 b.d.
5.059 15.5 0.1350 13 0.84 0.2718 8.4 816 101 1829 141 3317 132 25
A320 11800 89 32 0.98 b.d.
5.248 1.5 0.3015 1.0 0.66 0.1262 1.1 1699 14 1860 13 2046 19 83
A315 51914 106 54 1.10 1.0 9.676 2.0 0.4099 1.2 0.62 0.1712 1.5 2215 23 2404 18 2569 26 86
A278 63567 251 114 0.46 0.1 9.917 1.1 0.4051 0.8 0.77 0.1776 0.7 2192 15 2427 10 2630 11 83
91500
h
9384 69 13 0.46 0.5 1.838 3.0 0.1786 1.7 0.38 0.07465 2.4 1059 17 1059 20 1059 48 100
Felix
h
4694 227 26 1.76 0.4 0.6335 4.6 0.08112 3.5 0.34 0.05664 2.3 503 17 498 18 477 51 106
Plesovice
h
1723 581 30 0.12 0.2 0.3999 2.6 0.05415 2.5 0.37 0.05356 0.9 340 8 342 8 353 20 96
206
Pb/
238
U error is the quadratic additions of the within run precision (2 SE) and the external reproducibility (2 SD) of the reference zircon.
207
Pb/
206
Pb error propagation (
207
Pb
signal dependent) following Gerdes & Zeh (2009).
207
Pb/
235
U error is the quadratic addition of the
207
Pb/
206
Pb and
206
Pb/
238
U uncertainty.
a
Within run background-correctedmean
207
Pb signal in cps (counts per second).
b
U and Pb content and Th/U ratio were calculated relative to GJ-1 reference zircon.
c
Percentage of the common Pb on the
206
Pb. b.d. = below detection limit.
d
Pb/U and Pb/Pb ratios. Corrected for background, within-run Pb/U fractionation (in case of
206
Pb/
238
U) and common Pb using Stacy and Kramers (1975) model Pb
composition and subsequently normalised to GJ-1 (ID-TIMS value/measured value);
207
Pb/
235
U calculated using ((
207
Pb/
206
Pb)*(
238
U/
206
Pb)*137.88).
e
ZŚŽ ;ʌͿ ŝƐ ƚŚĞ ;
206
Pb/
238
U)/(
207
Pb/
235
U) error correlation coefficient.
f
Pb/U and Pb/Pb ages.
g
Degree of concordance = ((
206
Pb/
238
U age)/(
207
Pb/
206
Pb age)) x 100.
h
Mean of 13 (91500), 13 (Felix), 13 (Plesovice), and 26 (GJ-1) analyses, respectively.
227