Table T9. Estimates of accuracy and precision for JY2000 ICP-AES major element analyses.

Sample run or replicate Date
(Dec 1999)		 Major element (wt%) Total
SiO2 TiO2 Al2O3 Fe2O3 MnO MgO CaO Na2O K2O P2O5
MW8801-17-26 (whole rock)*










Probe
50.62 1.36 15.49 9.29 0.15 8.37 11.54 2.93 0.03 0.15 99.93
DCP
50.17 1.29 15.61 9.49 0.16 8.61 11.73 2.83 0.03 0.12 100.04
Leg187A 1 51.27† 1.32 15.21 9.38 0.16 8.56 11.40 2.54 0.04 0.13 100†
Leg187C 3 50.69 1.32 15.21 9.38 0.16 8.56 11.40 2.54 0.04 0.13 99.41
Leg187D.a 8 50.56 1.24 14.80 9.46 0.16 8.45 11.52 2.54 0.03 0.12 98.88
Leg187D.b 8 50.73 1.23 15.16 9.34 0.16 8.20 11.89 2.68 0.05 0.13 99.58
Leg187E.a 13 50.84 1.35 15.38 9.63 0.16 8.59 11.62 2.83 0.04 0.13 100.56
Leg187E.b 13 50.65 1.33 15.59 9.51 0.16 8.46 11.77 2.74 0.04 0.13 100.36
Leg187E.c 13 51.23 1.33 15.76 9.54 0.16 8.46 11.74 2.77 0.04 0.13 101.16
Leg187E.d 13 51.07 1.35 15.75 9.74 0.16 8.61 11.92 2.91 0.03 0.13 101.67
Leg187F.a 14 49.91 1.31 15.25 9.49 0.16 8.54 11.54 2.67 0.04 0.13 99.04
Leg187F.b 14 49.48 1.29 15.42 9.32 0.16 8.45 11.60 2.65 0.04 0.12 98.53
Leg187G.a 17 50.86 1.33 15.33 9.66 0.16 8.45 11.56 2.76 0.05 0.12 100.29
Leg187G.b 17 50.85 1.32 15.35 9.67 0.17 8.67 11.64 3.06 0.04 0.13 100.89
Leg187H.a 20 49.94 1.31 15.57 9.48 0.16 8.31 11.60 2.91 0.05 0.12 99.44
Leg187H.b 20 51.32 1.36 15.64 9.75 0.16 8.58 11.90 2.95 0.05 0.12 101.83
Leg187H.c 20 50.53 1.29 15.40 9.64 0.16 8.55 11.61 2.95 0.05 0.13 100.31
Leg187I.a 26 50.22 1.34 15.47 9.44 0.15 8.42 11.63 2.87 0.06 0.11 99.72
Leg187I.b 26 50.24 1.28 15.24 9.26 0.17 8.26 11.56 3.14 0.06 0.15 99.36

Average: 50.61 1.31 15.38 9.51 0.16 8.48 11.64 2.79 0.05 0.13

1 SD: 0.52 0.04 0.24 0.150 0.00 0.13 0.16 0.181 0.009 0.007

%RSD: 1.02 2.73 1.57 1.58 2.67 1.49 1.34 6.49 19.62 5.79
BHVO-2











Published value
49.9 2.73 13.5 12.3 0.166 7.23 11.4 2.22 0.52 0.27 100.236
±
0.6 0.04 0.2 0.2
0.12 0.2 0.08 0.01 0.02
Leg187C 3 48.28† 2.77 14.71 12.33 0.17 7.46 10.99 2.40 0.58 0.31 100†
Leg187D 8 50.08 2.57 12.91 11.98 0.17 7.11 11.27 2.19 0.49 0.28 99.04
Leg187E.a 13 49.50 2.72 14.12 12.10 0.17 7.25 11.50 2.12 0.44 0.28 100.20
Leg187E.b 13 48.92 2.69 14.22 12.18 0.16 7.14 11.41 2.02 0.44 0.28 99.48
Leg187E.c 13 49.86 2.79 14.34 12.32 0.17 7.18 11.52 2.27 0.41 0.28 101.15
Leg187E.d 13 49.40 2.75 14.14 12.51 0.17 7.25 11.52 2.17 0.44 0.27 100.62
Leg187F.a 14 48.97 2.66 13.72 12.07 0.17 7.25 11.26 2.06 0.41 0.27 98.83
Leg187F.b 14 50.05 2.73 13.82 12.31 0.17 7.13 11.46 2.06 0.40 0.24 100.37
Leg187G.a 17 48.93 2.70 13.42 12.32 0.17 7.20 11.23 2.14 0.52 0.27 98.90
Leg187G.b 17 48.63 2.66 13.41 12.10 0.17 7.20 11.12 2.45 0.53 0.31 98.59
Leg187H.a 20 48.83 2.66 13.81 11.98 0.16 7.04 11.27 2.19 0.54 0.25 98.74
Leg187H.b 20 49.62 2.73 13.86 12.04 0.17 7.36 11.53 2.27 0.54 0.28 100.39
Leg187H.c 20 48.21 2.61 13.40 11.81 0.16 7.08 11.08 2.00 0.57 0.29 97.19
Leg187I.a 26 49.06 2.66 13.66 12.10 0.17 7.19 11.21 2.24 0.52 0.26 99.08

Average: 49.17 2.69 13.82 12.15 0.17 7.20 11.31 2.18 0.49 0.28

1 SD: 0.61 0.06 0.46 0.185 0.00 0.11 0.18 0.13 0.06 0.018

%RSD: 1.23 2.30 3.35 1.52 1.76 1.52 1.59 6.14 13.12 6.40

Notes: These estimates are derived from replicate analyses of the USGS reference standard BHVO-2 and Zone A SEIR whole-rock basalt sample MW8801-17-26, Leg 187. * = D. Pyle and D. Christie (unpubl. data), microprobe and direct current plasma (DCP) analyses. † = SiO2 estimated by subtracting the total of the other major elements from 100%. SD = standard deviation, RSD = relative standard deviation. This table is also available in ASCII format.