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Table Ig10-Hf
Lu, Yb and Hf LA-MC-ICPMS data of zircon crystals from sample GCH-13
176
Yb
a
176
Lu
a
178
Hf
180
Hf Sig
Hf
b 176
Hf
176
Hf
d
ı
c
T
DM
e
age
f
ı U-Pb
g
Lu-Hf
h
177
Hf
177
Hf
177
Hf
177
Hf
(V)
177
Hf
177
Hf
(t)
İ+I (Ga) (Ma) (Ma) conc seq
A8_seq3_40 0.0349 29 0
.00113 7 1.46718
1.88670 15 0.282187 21 0.282176 -10.5 0.7 1.73 497 7 99 3
A8_seq3_40 0.0349 29 0
.00113 7 1.46718
1.88670 15 0.282187 21 0.282176 -10.5 0.7 1.73 497 7 99 3
A9_seq3_26 0.0285 26 0.00093 7 1.46714 1.88617 6 0.282628 33 0.282619 5.8 1.2 0.86 521 8 99 3
A10_seq3_26 0.0539 56 0
.00169 15 1.46714
1.88651 7 0.282632 32 0.282616 5.5 1.1 0.87 516 8 97 3
A12_seq3_40 0.0219 18 0.00069 4 1.46718 1.88663 15 0.282492 24 0.282485 0.6 0.8 1.13 503 7 99 3
A17_seq3_40 0.0173 14 0.00059 4 1.46715 1.88655 12 0.281570 21 0.281547 3.2 0.8 2.27 2076 31 99 3
A18_seq3_40 0.0746 71 0
.00223 18 1.46713 1.
88648 13 0.282556 24 0.282534 2.6 0.9 1.03 515 8 99 3
A19_seq3_26 0.0810 97 0
.00251 25 1.46712 1.
88630 7 0.282634 31 0.282610 5.0 1.1 0.88 502 7 97 3
A20_seq3_26 0.0407 38 0
.00127 10 1.46713
1.88665 7 0.282596 32 0.282584 4.0 1.1 0.94 498 7 100 3
A21_seq3_40 0.0946 90 0
.00304 24 1.46719
1.88676 12 0.282404 24 0.282374 -3.0 0.8 1.34 515 7 99 3
A22_seq3_40 0.0278 23 0.00085 5 1.46712 1.88628 11 0.281575 22 0.281542 3.1 0.8 2.28 2079 23 100 3
A23_seq3_40 0.0297 31 0.00087 8 1.46712 1.88643 14 0.282488 31 0.282481 -0.1 1.1 1.15 479 7 93 3
A26_seq3_40 0.0191 15 0.00057 3 1.46714 1.88666 12 0.281206 21 0.281184 -10.0 0.8 2.99 2062 28 102 3
A27_seq3_40 0.0661 68 0
.00206 18 1.46714
1.88663 13 0.282627 21 0.282608 4.6 0.7 0.89 486 7 102 3
A29_seq3_40 0.0372 30 0
.00120 7 1.46713
1.88654 14 0.282607 17 0.282596 4.5 0.6 0.91 501 7 100 3
A30_seq3_40 0.0557 50 0
.00166 12 1.46720
1.88682 14 0.282411 21 0.282395 -2.5 0.7 1.30 507 7 99 3
A38_seq3_40 0.0319 26 0.00096 6 1.46719 1.88670 13 0.282509 22 0.282500 1.1 0.8 1.10 503 6 98 3
A43_seq3_40 0.0356 32 0
.00118 8 1.46708
1.88672 10 0.282621 23 0.282610 5.4 0.8 0.88 518 8 91 3
A45_seq3_40 0.0295 38 0.
00098 10 1.46719 1.
88658 13 0.282435 21 0.282426 -1.7 0.7 1.25 493 7 96 3
A46_seq3_40 0.0389 34 0
.00119 9 1.46716
1.88685 12 0.282505 20 0.282495 0.3 0.7 1.12 474 7 91 3
A47_seq3_40 0.0581 88 0
.00173 24 1.46706
1.88619 12 0.282506 26 0.282489 1.0 0.9 1.11 514 7 99 3
A49_seq3_40 0.0283 24 0.00087 5 1.46714 1.88660 14 0.282520 22 0.282512 1.7 0.8 1.07 510 6 100 3
A50_seq3_40 0.0286 23 0.00092 6 1.46713 1.88658 12 0.282683 21 0.282674 8.0 0.8 0.74 536 8 100 3
A65_seq3_40 0
.0098 8 0.00034 2 1
.46718 1.88660 11 0.281536 21 0.281523 2.6 0.7 2.32 2087 27 99 3
A72_seq3_40 0.0254 37 0.
00079 11 1.46718
1.88649 14 0.282466 25 0.282459 -1.0 0.9 1.19 473 6 96 3
A85_seq3_40 0.0299 28 0.00093 7 1.46718 1.88656 11 0.282491 23 0.282479 4.9 0.8 1.06 703 154 73 3
A90_seq3_40 0.0151 13 0.00050 3 1.46706 1.88641 12 0.281551 28 0.281524 21.4 1.0 1.92 2889 69 99 3
A91_seq3_40 0.0534 47 0
.00165 12 1.46713
1.88654 15 0.282143 29 0.282128 -12.4 1.0 1.83 487 8 98 3
A95_seq3_40 0.0259 37 0.00080 11 1.46715 1.88676 13 0.282495 21 0.282488 0.0 0.8 1.13 473 8 97 3
Grain
ı
ı
±2ı
c
İ+I
(t)
d
Quoted uncertainties (absolute) relate to the last quoted figure. The effect of the inter-element fractionation on Lu/Hf was estimated to be about 6 % or less
based on analyses of the GJ-ϭ ĂŶĚ WůĞƐŽǀŝēĞ njŝƌĐŽŶ͘ ĐĐƵƌĂĐLJ ĂŶĚ ƌĞƉƌŽĚƵĐŝďŝůŝƚLJ ǁĂƐ ĐŚĞĐŬĞĚ ďLJ ƌĞƉĞĂƚĞĚ ĂŶĂůLJƐĞƐ ŽĨ ƌĞĨĞƌĞŶĐĞ njircon GJ-ϭ ĂŶĚ WůĞƐŽǀŝēĞ
(data given as mean with 2 standard deviation uncertainties).
(a)
176
Yb/
177
Hf = (
176
Yb/
173
Yb)
true
x (
173
Yb/
177
Hf)
meas
x (M
173(Yb)
/M
177(Hf)
)
ɴ;,ĨͿ
͕ ɴ;,ĨͿ с ůŶ;;
179
Hf/
177
Hf
true
)/(
179
Hf/
177
Hf
measured
)) / ln(M
179(Hf)
/M
177(Hf)
), M = mass of
respective isotopes. The
176
Lu/
177
Hf was calculated in a similar way using
175
Lu/
177
,Ĩ ĂŶĚ ɴ;zďͿ͘
(b)
Mean Hf signal in volts.
(c)
Uncertainties are quadratic additions of the within-run precision and the daily reproducibility of the 40ppb-JMC475 solution. Uncertainties for the JMC475
quoted at 2SD (2 standard deviation).
(d)
Initial
176
Hf/
177
,Ĩ ĂŶĚ ɸ,Ĩ ĐĂůĐƵůĂƚĞĚ ƵƐŝŶŐ ƚŚĞ ĂƉƉĂƌĞŶƚ h-Pb age determined by LA-ICP-MSdating (see column f), and the CHUR parameters:
176
Lu/
177
Hf =
0.0336, and
176
Hf/
177
Hf = 0.282785 (Bouvier et al. 2008).
(e)
Two stage model age in Ga using measured
176
Lu/
177
Lu of each spot (first stage = age of zircon), a value of 0.0113 for the average continental crust (second
stage, values compiled from Rudnick and Gao (2003), and depleted mantle
176
Lu/
177
Lu = 0.0379, and
176
Hf/
177
Hf = 0.283164.
(f)
Apparent U-Pb age determined by LA-ICP-MS.
(g)
U-Pb age concordance (%).
(h)
Sequence in which Lu-Hf analyses were performed. Standard analyses for each sequence are showed on Table 12.
330