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Table Ig8-Hf
Lu, Yb and Hf LA-MC-ICPMS data of zircon crystals from sample GCH-01
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
A412_seq3_40 0.0819 68 0
.00266 17 1.46720 1
.88667 12 0.282764 20 0.282739 9.6 0.7 0.63 503 7 93 3
A414_seq3_40 0.0676 55 0
.00223 14 1.46724 1
.88671 13 0.282761 25 0.282731 14.1 0.9 0.55 717 114 69 3
A417_seq3_40 0.0400 32 0
.00134 8 1.46721
1.88675 13 0.282750 22 0.282737 9.2 0.8 0.64 489 7 92 3
A418_seq3_40 0.0719 62 0
.00236 16 1.46718 1
.88683 14 0.282774 24 0.282752 10.0 0.8 0.60 500 7 90 3
A420_seq3_26 0.0838 73 0
.00274 19 1.46706
1.88653 7 0.282711 32 0.282684 7.9 1.1 0.73 516 6 100 3
A424_seq3_26 0.0695 59 0
.00234 15 1.46710 1
.88635 5 0.282759 28 0.282737 9.4 1.0 0.63 500 6 101 3
A425_seq3_40 0.0496 42 0
.00164 11 1.46721
1.88694 13 0.282752 25 0.282737 9.5 0.9 0.63 504 6 96 3
A426_seq3_40 0.0568 54 0
.00185 15 1.46717
1.88670 13 0.282773 23 0.282756 9.7 0.8 0.60 478 6 90 3
A435_seq3_40 0.0401 41 0
.00129 11 1.46718
1.88674 13 0.281920 25 0.281905 -17.6 0.9 2.21 605 7 90 3
A436_seq3_26 0.0665 84 0
.00223 25 1.46720 1
.88664 7 0.282819 38 0.282798 11.6 1.3 0.51 499 6 95 3
A445_seq3_26 0.0504 41 0
.00176 11 1.46711
1.88641 7 0.282771 32 0.282755 9.9 1.1 0.60 491 7 90 3
A446_seq3_26 0
.0013 1 0.00004 0
1.46719 1.88652 9 0.282754 28 0.282754 7.4 1.0 0.65 381 5 91 3
A448_seq3_26 0.0584 59 0
.00200 17 1.46709
1.88634 6 0.282783 30 0.282765 10.3 1.1 0.58 496 6 91 3
A456_seq3_26 0.0006 1 0.00002 0 1.46726 1.88653 9 0.282322 33 0.282322 -7.5 1.2 1.49 401 5 101 3
A457_seq3_26 0.0284 24 0.00098 6 1.46704 1.88653 5 0.281948 29 0.281938 -17.6 1.0 2.16 558 8 90 3
A459_seq3_40 0.0307 26 0
.00104 7 1.46717
1.88674 12 0.282735 18 0.282726 8.8 0.6 0.66 490 6 94 3
A465_seq3_26 0.0504 43 0
.00170 11 1.46717
1.88668 7 0.282725 33 0.282709 8.4 1.2 0.69 497 7 91 3
A470_seq3_26 0.0575 47 0
.00195 12 1.46712
1.88641 6 0.282775 25 0.282756 10.0 0.9 0.60 495 7 96 3
A477_seq3_26 0.0824 73 0
.00268 18 1.46713 1
.88635 6 0.282726 36 0.282688 13.3 1.3 0.62 750 42 66 3
A480_seq3_40 0.0258 23 0.00090 6 1.46707 1.88593 6 0.282714 43 0.282703 10.9 1.5 0.65 616 66 80 3
A482_seq3_26 0.0608 52 0
.00207 14 1.46714
1.88625 6 0.282746 33 0.282727 8.9 1.2 0.66 491 7 97 3
A491_seq3_26 0
.0017 2 0.00005 1
1.46717 1.88656 9 0.282770 21 0.282770 8.1 0.7 0.62 388 5 97 3
A514_seq3_26 0.0725 100 0
.00241 30 1.46714 1
.88635 8 0.282720 34 0.282697 8.0 1.2 0.71 498 7 97 3
A528_seq3_26 0.0228 19 0.00081 5 1.46713 1.88666 6 0.282022 26 0.282013 -14.7 0.9 2.02 566 7 92 3
A531_seq3_26 0.0365 34 0
.00120 8 1.46719
1.88636 8 0.282608 28 0.282593 8.5 1.0 0.84 685 34 84 3
A539_seq3_26 0.0316 29 0
.00104 8 1.46712
1.88636 8 0.282730 36 0.282722 7.4 1.3 0.69 433 6 101 3
A548_seq3_26 0
.0018 2 0.00006 0
1.46713 1.88630 9 0.282745 32 0.282745 7.2 1.1 0.67 386 6 98 3
A555_seq3_26 0.0544 119 0
.00205 46 1.46719
1.88687 7 0.282777 44 0.282761 8.3 1.6 0.63 410 6 101 3
A560_seq3_26 0.0529 57 0
.00175 16 1.46729
1.88666 6 0.282790 30 0.282774 10.7 1.1 0.56 496 6 92 3
A564_seq3_40 0.0335 30 0
.00109 8 1.46720
1.88673 11 0.282089 27 0.282077 -12.3 1.0 1.89 572 9 98 3
A565_seq3_40 0.0596 49 0
.00198 13 1.46720
1.88673 13 0.282736 28 0.282717 8.8 1.0 0.67 501 6 96 3
A571_seq3_26 0
.0044 4 0.00013 1 1
.46711 1.88638 9 0.282747 45 0.282746 7.5 1.6 0.66 397 5 96 3
A574_seq3_26 0.0152 17 0.00054 5 1.46712 1.88633 5 0.282153 25 0.282148 -9.8 0.9 1.76 571 10 93 3
A578_seq3_26 0.0912 76 0
.00304 20 1.46719
1.88648 6 0.282801 30 0.282773 10.5 1.1 0.57 487 7 96 3
A581_seq3_26 0.0582 81 0
.00209 22 1.46721
1.88672 7 0.282797 34 0.282778 10.7 1.2 0.56 492 7 98 3
A584_seq3_26 0.0190 17 0
.00116 8 1.46708
1.88555 9 0.282735 39 0.282726 6.8 1.4 0.70 399 8 95 3
A587_seq3_26 0.0408 69 0
.00141 23 1.46713
1.88631 6 0.282788 28 0.282774 11.4 1.0 0.55 530 7 98 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.
328