serie NOVA TERRA nº 48

Table Ig11-Hf

Lu, Yb and Hf LA-MC-ICPMS data of zircon crystals from sample GCH-14

176

178

180

Hf Sig

b 176

176

age

ı U-Pb

Lu-Hf

177

(V)

177

(t)

İ+I (Ga) (Ma) (Ma) conc seq

A125_40_seq1 0.0687 62 0

.00210 15 1.46710 1

.88679 10 0.282571 26 0.282551 3.0 0.9 1.00 505 8 99 1

A126_40_seq1 0.0383 36 0

.00125 9 1.46718

1.88685 12 0.282449 18 0.282437 -1.1 0.6 1.22 501 9 96 1

A129_40_seq1 0.0332 29 0

.00108 7 1.46709

1.88668 10 0.282450 24 0.282441 -2.1 0.9 1.23 454 8 99 1

A131_40_seq1 0.0342 29 0

.00111 7 1.46723

1.88680 12 0.282445 22 0.282435 -1.9 0.8 1.24 470 9 94 1

A139_40_seq1 0.0518 44 0

.00169 11 1.46720

1.88695 9 0.282511 28 0.282499 -1.3 1.0 1.14 397 8 100 1

A143_40_seq1 0.0686 63 0

.00214 16 1.46715 1

.88683 14 0.282473 25 0.282453 -0.7 0.9 1.19 497 7 99 1

A144_26_seq1 0.0445 38 0

.00139 9 1.46718

1.88688 11 0.282483 24 0.282470 0.0 0.8 1.16 498 7 100 1

A145_40_seq1 0.0085 9 0.00036 3 1.46725 1.88692 10 0.281587 22 0.281572 3.9 0.8 2.23 2068 16 97 1

A151_40_seq1 0.0809 67 0

.00255 16 1.46720 1

.88681 14 0.282448 24 0.282424 -1.4 0.8 1.24 508 8 99 1

A153_40_seq1 0.0381 31 0

.00124 8 1.46718

1.88687 11 0.282385 23 0.282373 -3.5 0.8 1.35 499 7 99 1

A156_40_seq1 0.0229 18 0.

00079 5 1.46716 1.

88669 10 0.281598 24 0.281569 0.0 0.8 2.31 1904 30 100 1

A163_40_seq1 0.0484 42 0

.00156 11 1.46716

1.88662 13 0.282354 26 0.282340 -4.7 0.9 1.41 497 7 100 1

A168_40_seq1 0.0255 26 0.00084 7 1.46711 1.88643 12 0.281771 29 0.281746 -1.3 1.0 2.11 1574 40 69 1

A169_26_seq1 0.0223 30 0.

00070 9 1.46700 1.

88628 8 0.281839 40 0.281818 0.2 1.4 1.99 1526 34 95 1

A174_40_seq1 0.0440 37 0

.00140 9 1.46721

1.88695 13 0.282501 16 0.282488 0.8 0.6 1.12 506 103 86 1

A179_40_seq1 0.0435 48 0

.00129 13 1.46716

1.88667 13 0.282580 23 0.282567 3.8 0.8 0.96 515 8 101 1

A180_40_seq1 0.0233 32 0.

00074 9 1.46719 1.

88681 15 0.282511 23 0.282504 1.0 0.8 1.09 491 8 100 1

A183_40_seq1 0.0729 60 0

.00230 14 1.46720 1

.88673 14 0.282409 21 0.282388 -3.3 0.7 1.33 482 7 100 1

A184_40_seq1 0.0447 44 0

.00138 11 1.46716

1.88680 12 0.282462 27 0.282448 0.2 0.9 1.18 544 14 96 1

A185_40_seq1 0.0188 35 0.

00058 10 1.46721 1.

88679 14 0.282510 22 0.282506 -2.0 0.8 1.15 353 5 94 1

A186_40_seq1 0.0941 79 0

.00291 19 1.46716 1

.88657 11 0.282694 21 0.282667 6.9 0.8 0.77 496 7 97 1

A191_40_seq1 0.0419 36 0

.00135 9 1.46711

1.88668 12 0.282402 26 0.282389 -2.8 0.9 1.31 504 9 100 1

A199_26_seq1 0.0399 34 0

.00128 8 1.46711

1.88650 6 0.282382 39 0.282369 -2.9 1.4 1.34 528 8 100 1

A201_40_seq1 0.0262 51 0.00080 15 1.46729 1.88695 12 0.282574 32 0.282567 2.1 1.1 0.99 440 7 99 1

A204_26_seq1 0

.0078 13 0.00026

4 1.46713 1.88642 6 0.282541 29 0.282541 -8.6 1.0 1.22 0 0 0 1

A206_40_seq1 0.0282 27 0.00093 7 1.46720 1.88680 10 0.282400 24 0.282391 -2.9 0.8 1.31 494 10 98 1

A212_40_seq1 0.0619 57 0

.00189 15 1.46714

1.88646 9 0.282625 25 0.282608 4.7 0.9 0.89 493 7 99 1

A214_40_seq1 0.0402 40 0

.00121 10 1.46717

1.88661 11 0.282643 24 0.282631 5.8 0.8 0.84 502 8 100 1

A217_40_seq1 0.0202 16 0.00064 4 1.46714 1.88670 11 0.281598 22 0.281573 3.4 0.8 2.24 2044 27 90 1

A221_40_seq1 0.0534 47 0

.00170 12 1.46714

1.88676 12 0.282460 26 0.282444 -1.5 0.9 1.22 473 8 95 1

A227_40_seq1 0.0825 71 0

.00255 18 1.46712 1

.88664 12 0.282430 20 0.282407 -3.0 0.7 1.29 463 7 99 1

A233_40_seq1 0.0544 44 0

.00167 10 1.46719

1.88688 14 0.282439 23 0.282423 -2.1 0.8 1.26 482 9 100 1

A243_40_seq1 0.0322 46 0

.00102 13 1.46722

1.88705 12 0.282604 32 0.282595 4.1 1.1 0.92 487 8 99 1

Grain

±2ı

İ+I

(t)

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)

177(Hf)

)

ɴ;,ĨͿ

͕ ɴ;,ĨͿ с ůŶ;;

179

Hf/

177

true

)/(

179

Hf/

177

measured

)) / ln(M

179(Hf)

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.

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