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Table T2. Preferred values for the rock standards used for calibration of major and trace element inductively coupled plasma–atomic emission spectroscopy analyses (volatile-free basis), Expedition 345.
|
Standard:
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JP-1
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MRG-1
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BCR-2
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JG-1a
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Concentration (wt%):
|
|
SiO2
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43.28
|
39.59
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54.17
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72.36
|
|
TiO2
|
0.01
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3.79
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2.26
|
0.25
|
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Al2O3
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0.71
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8.55
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13.52
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14.3
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Fe2O3(T)
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8.52
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18.26
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13.82
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2.06
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MgO
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45.6
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13.67
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3.59
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0.69
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MnO
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0.12
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0.17
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0.2
|
0.06
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CaO
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0.56
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14.98
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7.13
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2.18
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Na2O
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0.021
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0.74
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3.16
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3.46
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K2O
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0.003
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0.18
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1.79
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4.06
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P2O5
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0.002
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0.07
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0.35
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0.08
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Total:
|
98.83
|
100
|
99.99
|
100
|
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Concentration (ppm):
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|
Sc
|
7.4
|
56.1
|
33
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6.11
|
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V
|
27.7
|
532.4
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416.5
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22.93
|
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Cr
|
2935
|
451
|
18
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18.62
|
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Co
|
113
|
86
|
37
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5.9
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Ni
|
2424
|
187
|
18
|
6.41
|
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Cu
|
4.9
|
135.5
|
21
|
1.5
|
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Zn
|
42.9
|
192.5
|
127.2
|
37.55
|
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Sr
|
0.65
|
272.7
|
340.44
|
179.23
|
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Y
|
0.09
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13.26
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37.048
|
30.24
|
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Zr
|
5.53
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105.78
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184.24
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116.75
|
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Ba
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9.74
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54.76
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677.88
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464.6
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Nb
|
0.04
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21.26
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12.62
|
11.13
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Rb
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0.36
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8
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46.96
|
178.23
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W
|
0.863
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—
|
2.103
|
13.32
|
— = not applicable.
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