328 / 352
207
Pb
a
U
b
Pb
b
Th
b 206
Pbc
c 207
Pb
d
±2
V
206
Pb
d
±2
V
ȡ
e 207
Pb
d
±2
V
206
Pb
f
±2
V
207
Pb
f
±2
V
207
Pb
f
±2
V
Conc.
g
(cps) (ppm) (ppm)
U (%)
235
U (%)
238
U (%) (rho)
206
Pb (%)
238
U (Ma)
235
U (Ma)
206
Pb (Ma) (%)
Grain
A010 2486 293 25 0.55 b.d.
0.6677 3.1 0.0834 1.7 0.55 0.0581 2.5 516 8 519 12 533 56 97
A043 1391 156 13 0.31 b.d.
0.6808 4.1 0.0836 1.6 0.39 0.0590 3.7 518 8 527 17 568 81 91
A083 1389 156 16 1.33 b.d.
0.6764 4.5 0.0838 1.7 0.38 0.0585 4.1 519 9 525 19 549 90 94
A081 4127 464 40 0.48 b.d.
0.6710 2.4 0.0841 1.4 0.58 0.0579 2.0 521 7 521 10 524 43 99
A009 3909 503 43 0.42 b.d.
0.6712 4.1 0.0842 1.5 0.37 0.0578 3.8 521 8 521 17 524 82 99
A025 4921 562 48 0.42 0.3 0.6682 2.6 0.0842 1.4 0.54 0.0576 2.2 521 7 520 11 513 48 102
A080 3771 459 40 0.51 b.d.
0.6800 2.7 0.0845 1.4 0.54 0.0584 2.3 523 7 527 11 544 49 96
A048 11077 1209 103 0.37 0.3 0.6783 1.7 0.0845 1.3 0.75 0.0582 1.1 523 6 526 7 538 25 97
A064 3032 317 26 0.18 0.4 0.6825 3.3 0.0852 1.5 0.47 0.0581 2.9 527 8 528 14 533 63 99
A079 11838 1323 121 0.66 b.d.
0.6973 2.4 0.0865 1.4 0.60 0.0584 1.9 535 7 537 10 546 42 98
A050 2845 306 28 0.64 b.d.
0.6948 2.6 0.0867 1.5 0.58 0.0581 2.1 536 8 536 11 534 47 100
A060 6171 517 47 0.32 3.3 0.7039 5.1 0.0872 1.5 0.30 0.0586 4.9 539 8 541 22 551 107 98
A057 8213 853 81 0.51 b.d.
0.7600 2.1 0.0924 1.2 0.57 0.0596 1.7 570 7 574 9 590 38 97
A061 21200 125 54 0.84 0.0 6.4660 1.9 0.3764 1.5 0.75 0.1246 1.3 2060 26 2041 17 2023 23 102
A017 12094 70 31 1.01 b.d.
6.6720 2.4 0.3769 1.6 0.67 0.1284 1.8 2062 28 2069 21 2076 31 99
A065 7985 45 19 0.71 b.d.
6.7350 2.1 0.3781 1.4 0.68 0.1292 1.5 2067 25 2077 19 2087 27 99
A022 10591 62 28 1.02 b.d.
6.7660 1.8 0.3815 1.3 0.69 0.1286 1.3 2083 23 2081 16 2079 23 100
A026 8037 97 48 1.51 b.d.
6.7940 2.1 0.3869 1.4 0.65 0.1274 1.6 2109 25 2085 19 2062 28 102
A014 91021 540 337 0.82 b.d. 13.1200 1.9 0.5177 1.8 0.91 0.1838 0.8 2689 39 2688 19 2688 13 100
A090 16235 52 39 0.80 0.0 16.0400 4.6 0.5597 1.8 0.38 0.2078 4.2 2866 41 2879 45 2889 69 99
A013 8705 391 32 0.52 3.0 0.6298 4.1 0.0742 1.4 0.35 0.0616 3.8 461 6 496 16 658 82 70
A092 2930 95 9 1.00 6.3 0.6346 7.3 0.0771 1.8 0.25 0.0597 7.1 479 8 499 29 593 154 81
A099 8357 217 25 1.68 8.0 0.6638 8.6 0.0809 1.6 0.19 0.0595 8.5 501 8 517 36 587 184 85
A085 3636 132 13 0.92 6.3 0.7143 7.4 0.0824 1.6 0.21 0.0629 7.2 511 8 547 32 703 154 73
A086 4765 477 42 0.59 7.3 0.7070 10.7 0.0834 2.2 0.21 0.0615 10.5 516 11 543 46 657 225 79
91500
h
8532 69 13 0.45 0.3 0.1784 3.8 1.8103 6.1 0.07 4.3867 0.6 1058 37 1049 40 1030 89 103
Felix
h
4019 203 23 1.93 0.4 0.0808 4.3 0.6109 10.3 0.05 7.7221 0.4 501 21 484 40 402 176 132
Plesovice
h
2881 1038 54 0.16 0.2 0.0549 3.8 0.4045 3.8 0.05 1.5557 0.5 344 13 345 11 348 35 99
GJ-1
h
6932 290 26 0.02 0.1 0.0984 1.1 0.8158 2.0 0.06 2.0856 0.5 605 6 606 9
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-corrected mean
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 11 (91500), 11 (Felix), 9 (Plesovice), and 26 (GJ-1) analyses, respectively.
312