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Table T9. Analytical reproducibility and accuracy of ICP-AES data during Expedition 305. (See table notes. Continued next page.)

Standard Date
(2005)		 Sample Major element oxides (wt%)
SiO2 Al2O3 Fe2O3 MgO MnO CaO Na2O K2O P2O5 TiO2 Total
DTS-1 23 Jan 1 40.83 0.18 8.74 48.10 0.12 0.10 BDL BDL BDL BDL 98.08

  2 41.23 0.19 8.39 50.62 0.12 0.10 BDL BDL BDL BDL 100.64
25 Jan 1 39.77 0.18 8.67 49.74 0.12 0.09 BDL BDL BDL BDL 98.61
  2 40.22 0.18 9.51 50.50 0.11 0.09 BDL BDL BDL BDL 100.67
27 Jan 1 39.51 0.28 8.34 51.33 0.12 0.11 BDL BDL BDL BDL 99.70
  2 39.85 0.20 8.32 47.36 0.11 0.10 BDL BDL BDL BDL 96.01
30 Jan 1 40.27 0.15 8.52 48.29 0.12 0.08 BDL BDL BDL BDL 97.48
  2 40.14 0.20 8.49 49.86 0.12 0.12 BDL BDL BDL BDL 98.95
2 Feb 1 41.65 0.17 8.76 49.62 0.12 0.07 BDL BDL BDL BDL 100.41
  2 41.10 0.18 8.51 49.20 0.12 0.08 BDL BDL BDL BDL 99.22
3 Feb 1 40.91 0.18 8.64 50.51 0.12 0.07 BDL BDL BDL BDL 100.42
  2 40.46 0.18 8.67 49.60 0.12 0.07 BDL BDL BDL BDL 99.11
9 Feb 1 41.64 0.19 8.57 50.78 0.12 0.10 BDL BDL BDL BDL 101.45
  2 40.64 0.18 8.50 49.70 0.11 0.10 BDL BDL BDL BDL 99.28
11 Feb 1 40.39 0.17 8.78 49.59 0.12 0.08 BDL BDL BDL BDL 99.16
  2 39.91 0.18 8.54 48.11 0.12 0.08 BDL BDL BDL BDL 96.95
13 Feb 1 40.27 0.19 8.51 48.99 0.12 0.06 BDL BDL BDL BDL 98.18
  2 39.48 0.18 8.33 49.01 0.12 0.05 BDL BDL BDL BDL 97.18
15 Feb 1 40.74 0.19 8.78 49.39 0.12 0.07 BDL BDL BDL BDL 99.29
  2 39.92 0.19 8.50 49.74 0.12 0.07 BDL BDL BDL BDL 98.54
17 Feb 1 40.01 0.19 8.50 49.60 0.12 0.10 BDL BDL BDL BDL 98.60
  2 39.45 0.19 8.52 48.49 0.12 0.10 BDL BDL BDL BDL 96.95
Averages: 40.38 0.18 8.60 49.46 0.12 0.09 BDL BDL BDL BDL 98.86
Certified values: 40.74 0.19 8.75 50.00 0.12 0.17 0.01 0.01 0.00 0.01 100.00
Precision: 0.64 0.01 0.25 0.94 0.00 0.02 — — — — —

1.58% 5.4% 2.9% 1.9% 3.1% 10.7% — — — — —
Accuracy: 0.36 0.01 0.15 0.54 0.00 0.09 — — — — —

0.88% 4.6% 1.8% 1.1% 1.7% 49.9% — — — — —
JGb-1 23 Jan 1 41.87 18.22 15.18 8.31 0.19 11.88 1.23 0.23 BDL 1.51 98.67

  2 46.29 18.23 15.89 8.08 0.19 11.55 1.24 0.23 BDL 1.60 103.34
25 Jan 1 45.01 17.46 13.66 7.58 0.20 11.85 1.28 0.22 BDL 1.59 98.93
  2 45.03 19.31 17.35 7.62 0.19 10.24 1.40 0.45 BDL 1.76 103.43
27 Jan 1 44.59 17.69 14.87 8.36 0.20 12.03 1.24 0.23 BDL 1.57 100.82
  2 46.45 18.03 16.05 8.22 0.20 11.78 1.25 0.24 BDL 1.65 103.89
30 Jan 1 44.43 18.10 15.98 8.05 0.19 11.92 1.25 0.24 BDL 1.61 101.80
  2 44.53 17.61 15.34 8.18 0.19 11.85 1.23 0.23 BDL 1.59 100.79
3 Feb 1 44.01 17.43 15.77 7.94 0.19 12.25 1.27 0.24 BDL 1.60 100.71
Averages: 44.07 17.75 15.13 8.07 0.19 11.96 1.25 0.23 BDL 1.58 100.29
Certified values: 43.66 17.49 15.06 7.85 0.19 11.90 1.20 0.24 0.06 1.60 100.00
Precision: 1.13 0.33 0.82 0.29 0.00 0.16 0.02 0.01 — 0.04 1.22

2.58% 1.9% 5.5% 3.7% 2.0% 1.3% 1.7% 2.2% — 2.4% 1.2%
Accuracy: –0.41 –0.26 –0.07 –0.22 –0.01 –0.06 –0.05 0.01 — 0.02 –0.29

–0.9% –1.5% –0.5% –2.8% –3.0% –0.5% –4.2% 3.5% — 1.3% –0.3%
JB-3 10 Feb 1                      

  2                      
11 Feb 1 51.17 17.00 11.61 5.15 0.18 9.48 2.76 0.76 0.36 1.38 99.86
  2 48.46 16.99 11.99 5.16 0.18 9.87 2.76 0.79 0.31 1.40 97.92
13 Feb 1 50.95 16.75 11.66 5.21 0.18 9.83 2.70 0.75 0.51 1.40 99.94
  2 51.16 16.73 11.78 5.07 0.18 9.77 2.75 0.75 0.46 1.40 100.05
15 Feb 1 51.50 17.30 11.68 5.18 0.18 9.77 2.72 0.77 0.24 1.42 100.75
  2 50.75 16.81 11.53 5.21 0.18 9.69 2.71 0.78 0.32 1.45 99.44
17 Feb 1 50.44 17.38 11.70 5.22 0.18 9.39 2.79 0.76 0.44 1.34 99.64
  2 49.49 16.65 11.94 5.04 0.18 9.72 2.76 0.77 0.42 1.44 98.42
Averages: 50.49 16.95 11.74 5.15 0.18 9.69 2.74 0.77 0.38 1.40 99.50
Certified values: 50.96 17.20 11.82 5.19 0.18 9.79 2.73 0.78 0.29 1.44 100.00
Precision: 1.03 0.27 0.16 0.07 0.00 0.17 0.03 0.01 0.09 0.03 0.92

2.01% 1.6% 1.3% 1.3% 1.4% 1.7% 1.1% 1.7% 30.5% 2.3% 0.9%
Accuracy: 0.47 0.25 0.08 0.04 0.00 0.10 –0.01 0.01 –0.09 0.04 0.50

0.92% 1.4% 0.7% 0.7% –1.6% 1.0% –0.5% 1.8% –30.6% 2.6% 0.5%
305-U1309D-171R-4,18–30 cm                    

23 Jan 1 52.66 16.75 5.33 8.36 0.10 14.00 2.63 0.03 0.03 0.52 100.40
  2 52.31 16.79 5.33 8.16 0.10 13.90 2.64 0.03 0.04 0.52 99.82
  3 51.57 16.77 5.36 8.34 0.11 14.02 2.66 0.03 0.02 0.48 99.34
Averages: 52.18 16.77 5.34 8.28 0.10 13.97 2.64 0.03 0.03 0.51 99.85
Precision: 0.56 0.02 0.02 0.11 0.00 0.07 0.01 0.00 0.01 0.02 0.53

1.07% 0.1% 0.3% 1.3% 1.2% 0.5% 0.5% 1.3% 39.5% 4.5% 0.5%

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