Table
T7. Major element analytical precision determined during Leg 183.
Notes: * = analyses run through Site 1138 samples. SD = standard deviation.
† = analyses run after Site 1138 samples. Means (in weight percent) and
standard deviations of repeated analyses of the BHVO-1 reference standard are
reported as two sets because of recalibration after mechanical repairs during
the leg. ** = samples
from Sites 1141 and 1142 were analyzed postcruise at The University of
Massachusetts. Kilauea 1919-1 is a sample collected from the same flow as BHVO-1
and is used as a standard at The University of Massachusetts. The reported
values are the average and standard deviation of three replicate measurements.
Element
BHVO-1
Published valuesMean
1*
(N = 26)1
SD*
(%)Mean
2†
(N = 13)1
SD†
(%)Kilauea
1919-1**1
SD**
(%)
SiO2
49.62
49.53
0.45
49.86
0.23
49.65
0.04
TiO2
2.70
2.75
2.51
2.70
0.39
2.804
0.003
Al2O3
13.67
13.65
1.04
13.60
0.61
13.56
0.03
Fe2O3
12.23
12.18
0.62
12.29
1.05
12.09
0.01
MnO
0.17
0.17
2.39
0.18
2.07
0.159
0.001
MgO
7.13
7.09
1.80
7.09
0.38
6.530
0.004
CaO
11.32
11.37
0.71
11.35
0.19
11.41
0.01
Na2O
2.27
1.99
6.11
2.08
4.29
2.44
0.02
K2O
0.54
0.54
1.64
0.54
5.77
0.537
0.002
P2O5
0.27
0.26
1.91
0.28
1.88
0.286
0.001