255 / 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
A524 70097 308 125 0.50 b.d.
6.866 0.9 0.3752 0.7 0.76 0.1327 0.6 2054 12 2094 8 2134 10 96
A540 18073 82 35 0.85 b.d.
6.899 1.3 0.3747 0.8 0.63 0.1335 1.0 2052 15 2099 12 2145 18 96
A422 27455 125 57 1.06 b.d.
6.970 1.2 0.3798 0.8 0.70 0.1331 0.9 2075 15 2108 11 2139 15 97
A514 10154 43 20 1.10 0.0 7.017 1.7 0.3809 0.9 0.50 0.1336 1.5 2080 15 2114 16 2146 26 97
A389 23829 104 44 0.66 b.d.
7.060 1.2 0.3778 0.9 0.73 0.1355 0.8 2066 15 2119 11 2171 14 95
A406 11541 50 23 0.95 b.d.
7.114 1.5 0.3834 1.0 0.70 0.1346 1.1 2092 19 2126 13 2159 18 97
A506 41866 185 85 0.96 0.0 7.115 1.1 0.3897 0.7 0.61 0.1324 0.9 2122 12 2126 10 2130 15 100
A530 45531 376 165 0.78 0.0 7.419 1.1 0.3831 0.7 0.62 0.1404 0.8 2091 12 2163 10 2233 14 94
A409 38772 223 95 0.58 0.1 7.705 1.2 0.3820 0.7 0.62 0.1463 0.9 2086 13 2197 11 2303 16 91
A447
100655 337 161 0.74
0.0 9.131 0.9 0.4164 0.7 0.72 0.1591 0.6 2244 12 2351 8 2446 11 92
A425 53950 168 79 0.44 0.0 9.653 1.4 0.4242 1.2 0.84 0.1651 0.8 2279 23 2402 13 2508 13 91
A538 79480 229 118 0.96 0.0 9.760 1.0 0.4291 0.7 0.66 0.1650 0.7 2302 13 2412 9 2507 13 92
A405 59245 191 90 0.38 0.0 9.896 1.0 0.4370 0.7 0.72 0.1643 0.7 2337 14 2425 9 2500 11 93
A518 73444 214 103 0.39 0.1 10.44 1.1 0.4368 0.9 0.80 0.1733 0.6 2336 17 2474 10 2590 11 90
A485 72345 211 104 0.45 0.0 10.57 0.9 0.4445 0.7 0.71 0.1725 0.7 2371 13 2486 9 2582 11 92
A426 187309 523 251 0.21 0.0 10.87 0.9 0.4533 0.7 0.78 0.1740 0.6 2410 14 2512 8 2596 9 93
A388 47652 138 72 0.47 0.0 11.09 1.0 0.4746 0.7 0.66 0.1694 0.8 2504 14 2530 10 2552 13 98
A408 33471 94 53 0.95 0.1 11.34 1.1 0.4701 0.8 0.73 0.1750 0.8 2484 17 2552 11 2606 13 95
A466 30310 84 48 0.90 0.0 11.40 1.2 0.4798 0.9 0.72 0.1723 0.8 2527 18 2556 11 2580 14 98
A484 102084 274 157 1.06 0.0 11.45 0.9 0.4668 0.6 0.72 0.1780 0.6 2469 13 2561 8 2634 10 94
A547 127540 334 175 0.40 0.0 11.75 0.9 0.4771 0.7 0.74 0.1786 0.6 2514 14 2585 8 2640 10 95
A458 17213 44 31 2.43 b.d.
12.01 1.5 0.4794 1.1 0.73 0.1817 1.0 2525 23 2605 14 2669 17 95
A417 58647 314 193 1.06 b.d.
12.35 1.3 0.5008 1.0 0.77 0.1788 0.8 2617 21 2631 12 2642 13 99
A463 152796 782 491 1.10 0.0 12.75 2.0 0.5132 1.9 0.96 0.1801 0.6 2670 41 2661 19 2654 10 101
A528 17829 42 26 1.00 0.1 12.87 1.4 0.5040 0.9 0.68 0.1852 1.0 2631 21 2670 13 2700 17 97
A420 74326 176 99 0.45 0.1 13.00 1.0 0.5071 0.7 0.74 0.1859 0.6 2644 15 2679 9 2706 11 98
A472 160878 790 443 0.37 0.0 13.16 1.0 0.5070 0.7 0.73 0.1883 0.7 2644 16 2691 10 2727 11 97
A507 230924 1092 623 0.20 b.d.
14.03 1.1 0.5338 0.9 0.79 0.1906 0.7 2757 20 2752 11 2748 12 100
A375 13180 29 18 0.66 0.0 14.40 1.7 0.5272 1.1 0.67 0.1981 1.2 2729 25 2776 16 2810 20 97
A556 55219 116 79 1.16 0.2 14.48 1.2 0.5321 0.9 0.77 0.1973 0.8 2750 21 2781 12 2804 13 98
A390 115498 230 169 1.53 0.1 15.80 1.2 0.5467 1.0 0.80 0.2095 0.7 2812 22 2865 11 2902 11 97
A454 163722 361 250 1.06 0.0 16.53 1.0 0.5660 0.8 0.81 0.2118 0.6 2891 19 2908 9 2919 9 99
A400 24674 47 35 1.21 0.0 16.98 1.5 0.5775 1.0 0.67 0.2133 1.1 2939 24 2934 15 2930 18 100
A534 51914 35 25 0.68 0.1 19.60 1.2 0.5903 0.9 0.70 0.2408 0.9 2991 20 3072 12 3125 14 96
A453
1540 29 3 0.74 b.d.
0.7287 3.5 0.08386 1.3 0.36 0.06302 3.3 519 6 556 15 709 69 73
A399
1804 60 6 0.61 0.1 0.9388 3.2 0.09413 1.2 0.37 0.07233 3.0 580 7 672 16 995 61 58
A554 14030 262 38 0.64 0.0 1.384 2.5 0.1328 2.3 0.90 0.07562 1.1 804 17 882 15 1085 22 74
A402 10529 99 25 0.30 1.4 3.344 2.3 0.2422 0.8 0.35 0.1001 2.2 1398 10 1491 18 1627 40 86
A544 40564 314 87 1.17 0.3 3.355 2.3 0.2131 2.1 0.90 0.1142 1.0 1246 24 1494 18 1867 18 67
A455 79133 708 142 0.15 0.3 3.669 1.1 0.1969 0.7 0.61 0.1351 0.9 1159 7 1565 9 2166 16 54
A436 10932 49 27 3.14 0.0 5.992 2.1 0.3338 1.1 0.53 0.1302 1.7 1857 18 1975 18 2101 31 88
A479 14651 53 29 2.00 0.1 8.442 1.6 0.3801 0.9 0.61 0.1611 1.2 2077 17 2280 14 2467 21 84
A431 25348 92 39 0.61 0.7 9.382 1.6 0.3668 1.0 0.65 0.1855 1.2 2014 17 2376 14 2703 20 75
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.
239