299 / 352
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
İ+I
(t)
d
Grain
ı
ı
±2ı
c
A124_seq5_40 0
.0071 6 0.00022 1
1.46711 1.88659 12 0.281111 20 0.281103 -17.8 0.7 3.24 1848 36 95 5
A125_seq5_40 0.0162 15 0.00059 5 1.46719 1.88686 13 0.281583 25 0.281560 4.2 0.9 2.24 2099 19 100 5
A126_seq5_40 0.0161 17 0.00050 4 1.46716 1.88691 12 0.281601 21 0.281582 4.1 0.7 2.21 2062 25 98 5
A127_seq5_40 0.0124 13 0.00043 4 1.46714 1.88667 14 0.280941 22 0.280916 2.2 0.8 3.08 2994 17 98 5
A133_seq5_40 0.0627 52 0
.00181 12 1.46715
1.88666 11 0.281177 24 0.281084 1.2 0.9 2.89 2699 11 98 5
A135_seq5_40 0.0151 13 0.00048 3 1.46719 1.88705 14 0.281754 20 0.281749 -24.8 0.7 2.53 533 9 97 5
A136_seq5_40 0.0269 22 0.00087 5 1.46718 1.88669 12 0.281079 20 0.281033 -0.3 0.7 2.98 2709 10 98 5
A137_seq5_40 0.0190 15 0.00058 3 1.46722 1.88685 13 0.281587 19 0.281564 3.5 0.7 2.25 2061 19 97 5
A139_seq5_40 0.0176 15 0.00059 4 1.46723 1.88698 12 0.281092 23 0.281061 0.3 0.8 2.94 2694 15 99 5
A141_seq5_40 0.0038 3 0.
00012 1 1.46718 1.
88686 14 0.281017 20 0.281011 -3.1 0.7 3.07 2621 24 96 5
A142_seq5_40 0
.0039 3 0.00013 1 1
.46716 1.88690 15 0.281028 20 0.281021 -3.2 0.7 3.06 2605 16 90 5
A143_seq5_26 0
.0084 7 0.00028 2 1
.46718 1.88661 8 0.281041 32 0.281027 -2.2 1.1 3.03 2636 12 99 5
A144_seq5_40 0
.0078 7 0.00030 2
1.46717 1.88672 19 0.281560 18 0.281548 3.2 0.6 2.27 2075 18 96 5
A145_seq5_40 0.0204 19 0.00066 5 1.46720 1.88672 13 0.281607 24 0.281581 4.9 0.8 2.20 2099 23 100 5
A153_seq5_40 0.0212 17 0.
00074 5 1.46713 1.
88648 8 0.281548 29 0.281519 2.5 1.0 2.32 2088 17 98 5
A154_seq5_26 0.0345 29 0
.00120 8 1.46710
1.88662 7 0.282312 29 0.282296 -2.2 1.0 1.42 677 9 97 5
A155_seq5_26 0.0512 58 0
.00183 18 1.46713
1.88652 6 0.281638 33 0.281566 3.8 1.2 2.24 2074 27 99 5
A156_seq5_26 0.0236 27 0.
00077 7 1.46713 1.
88661 6 0.281180 28 0.281142 1.0 1.0 2.82 2599 14 99 5
A158_seq5_26 0.0197 19 0.00069 5 1.46720 1.88659 6 0.281041 31 0.281006 -2.0 1.1 3.05 2679 16 95 5
A159_seq5_26 0
.0086 20 0.00031 6
1.46708 1.88655 7 0.281439 27 0.281427 -0.9 1.0 2.51 2084 19 99 5
A160_seq5_40 0.0240 20 0.
00077 5 1.46718 1.
88671 12 0.282423 20 0.282414 -0.2 0.7 1.23 578 8 98 5
A161_seq5_40 0.0222 18 0.00069 4 1.46718 1.88685 11 0.281457 25 0.281432 -3.5 0.9 2.55 1963 20 99 5
A163_seq5_26 0.0225 24 0.
00071 6 1.46719 1.
88652 6 0.281119 32 0.281083 0.8 1.2 2.90 2680 18 100 5
A164_seq5_26 0.0198 20 0.
00075 7 1.46709 1.
88645 6 0.281842 24 0.281835 -21.7 0.8 2.37 536 7 99 5
A165_seq5_26 0.0240 20 0.00085 6 1.46715 1.88650 5 0.282488 33 0.282477 4.7 1.2 1.06 697 11 101 5
A166_seq5_40 0.0291 29 0.00093 7 1.46716 1.88677 13 0.282577 17 0.282567 4.9 0.6 0.94 563 8 100 5
A168_seq5_26 0.0301 28 0.00096 7 1.46721 1.88675 6 0.281076 36 0.281027 -0.9 1.3 3.01 2692 16 100 5
A169_seq5_26 0.0208 17 0.
00071 5 1.46716 1.
88651 6 0.281664 34 0.281636 6.7 1.2 2.09 2090 28 97 5
A170_seq5_26 0.0190 18 0.00059 5 1.46716 1.88648 7 0.281064 30 0.281035 -2.7 1.1 3.03 2606 13 100 5
A173_seq5_26 0
.0079 15 0.00023
4 1.46713 1.88649 8 0.281573 26 0.281564 3.1 0.9 2.26 2046 15 100 5
A174_seq5_26 0.0192 17 0.00065 4 1.46714 1.88646 6 0.281622 31 0.281595 6.7 1.1 2.14 2156 25 99 5
A175_seq5_26 0.0028 2 0.
00011 1 1.46712 1.
88621 6 0.281031 29 0.281027 -16.3 1.0 3.31 2034 19 97 5
A177_seq5_26 0.0126 11 0.00043 3 1.46713 1.88664 7 0.281599 35 0.281582 4.4 1.3 2.21 2073 60 100 5
A181_seq5_26 0.0408 38 0
.00134 10 1.46714
1.88647 5 0.282459 34 0.282444 0.8 1.2 1.18 577 10 104 5
A182_seq5_26 0.0175 15 0.00063 4 1.46715 1.88642 7 0.281628 27 0.281603 4.6 1.0 2.17 2052 27 97 5
A183_seq5_26 0.0171 19 0.00063 6 1.46709 1.88633 7 0.281592 27 0.281566 4.2 1.0 2.23 2092 34 97 5
A185_seq5_26 0.0182 15 0.
00071 4 1.46709 1.
88653 6 0.282377 29 0.282369 -2.1 1.0 1.33 564 8 99 5
A191_seq5_26 0.0470 52 0
.00158 15 1.46723
1.88660 6 0.281700 39 0.281636 7.5 1.4 2.07 2127 13 98 5
A192_seq5_40 0.0194 19 0.
00074 6 1.46720 1.
88681 11 0.282620 19 0.282612 6.5 0.7 0.85 565 9 101 5
A199_seq5_26 0.0379 36 0
.00129 10 1.46708
1.88642 6 0.282247 40 0.282228 -2.6 1.4 1.52 765 12 101 5
A200_seq5_26 0.0126 14 0.00051 4 1.46707 1.88655 5 0.281622 35 0.281602 5.4 1.3 2.16 2089 21 98 5
A202_seq5_26 0.0275 24 0
.00101 7 1.46709
1.88647 5 0.281613 43 0.281574 3.2 1.5 2.24 2036 23 101 5
A203_seq5_26 0.0136 11 0.00056 3 1.46704 1.88630 5 0.282246 38 0.282241 -7.2 1.4 1.59 539 7 92 5
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 ƌĞĨĞƌĞnce zircon GJ-1 and
WůĞƐŽǀŝēĞ ;ĚĂƚĂ ŐŝǀĞŶ ĂƐ ŵĞĂŶ ǁŝƚŚ Ϯ ƐƚĂŶĚĂƌĚ ĚĞǀŝĂƚŝŽŶ ƵŶĐĞƌƚĂŝŶƚŝĞƐͿ͘
(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.
283