258 / 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
A009 13008 51 23 1.12 0.3 6.884 1.9 0.3840 1.3 0.68 0.1300 1.4 2095 23 2097 17 2098 25 100
A010
3502 13 6 0.44 b.d.
7.102 2.4 0.3844 1.3 0.52 0.1340 2.0 2097 22 2124 21 2151 35 97
A098 14726 57 25 0.71 0.5 7.138 2.2 0.3911 1.3 0.60 0.1324 1.8 2128 24 2129 20 2130 31 100
A042 22529 78 33 0.42 0.0 7.691 1.5 0.4006 1.1 0.78 0.1392 0.9 2172 21 2196 13 2218 16 98
A039 112544 341 146 0.29 0.1 8.586 1.1 0.4040 1.0 0.85 0.1541 0.6 2187 18 2295 10 2392 10 91
A163 345229 851 376 0.29 0.0 9.116 1.4 0.4165 1.2 0.90 0.1587 0.6 2245 23 2350 13 2442 10 92
A051 107052 594 278 0.08 0.0 9.921 1.3 0.4591 1.1 0.80 0.1567 0.8 2436 21 2427 12 2421 13 101
A030 6
2001 174 88 0.53 0.
1 10.11 1.4 0.4580 1.2 0.86 0.1602 0.7 2431 24 2445 13 2457 12 99
A164 49963 153 91 1.79 0.1 10.63 1.4 0.4396 1.1 0.79 0.1754 0.8 2349 21 2491 13 2610 14 90
A081 82142 144 92 0.66 5.7 11.67 2.7 0.4855 1.2 0.44 0.1743 2.4 2551 25 2578 26 2599 40 98
A086 41287 98 60 1.30 0.0 12.12 1.6 0.4853 1.2 0.78 0.1811 1.0 2550 26 2613 15 2663 16 96
A059 27260 60 36 0.97 0.1 12.46 1.5 0.5000 1.0 0.67 0.1807 1.1 2614 21 2640 14 2660 18 98
A017b 46112 111 68 0.96 0.0 12.46 1.4 0.5073 1.0 0.76 0.1781 0.9 2645 23 2640 13 2636 15 100
A120 55297 127 76 0.82 b.d.
13.02 1.4 0.5074 1.2 0.80 0.1862 0.9 2646 25 2681 14 2709 14 98
A027 16212 31 24 2.39 0.2 13.04 2.0 0.5060 1.1 0.55 0.1869 1.7 2640 24 2682 19 2715 28 97
A093 21917 98 60 0.85 0.1 13.10 1.7 0.5112 1.2 0.73 0.1858 1.1 2662 27 2687 16 2706 19 98
A121 59312 114 77 1.12 0.1 15.48 1.3 0.5393 1.0 0.78 0.2082 0.8 2781 23 2845 13 2892 13 96
A058
-35
A020
821 27 2 0.63 b.d.
0.7978 5.0 0.08466 1.5 0.30 0.06835 4.8 524 7 596 23 879 99 60
A015b 14759 301 49 5.56 2.3 0.6748 4.6 0.08655 1.5 0.32 0.05655 4.3 535 8 524 19 474 96 113
A016b 15858 205 26 1.04 15.8 0.8276 10.3 0.08780 1.9 0.19 0.06836 10 543 10 612 49 880 210 62
A021
136 5
1 0.80 b.d.
0.8860 12.7 0.09786 2.8 0.22 0.06566 12 602 16 644 63 796 260 76
A136 38867 257 59 0.56 1.2 3.027 2.6 0.2043 2.0 0.79 0.1074 1.6 1199 22 1414 20 1756 29 68
91500
h
8681 72 13 0.44 0.4 1.835 3.6 0.1782 2.7 0.67 0.07470 2.0 1057 26 1058 24 1060 40 100
Felix
h
7868 410 60 3.53 0.2 0.6419 2.8 0.08134 2.6 0.62 0.05724 1.7 504 13 503 11 501 37 101
Plesovice
h
2176 529 27 0.14 0.4 0.3942 2.3 0.05381 1.9 0.50 0.05313 2.0 338 6 337 7 334 45 102
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 4 (91500), 5 (Felix), 5 (Plesovice), and 10 (GJ-1) analyses, respectively.
242