Table 3. Values for international reference standards.
| BHVO-1 | BIR-1 | JB-1A | |
|---|---|---|---|
| Major oxides (wt%, XRF by Copenhagen) | |||
SiO2 |
50.02 |
47.82 |
|
TiO2 |
2.739 |
0.968 |
|
Al2O3 |
13.65 |
15.49 |
|
Fe2O3 |
11.92 |
11.27 |
|
FeO |
0.00 |
0.00 |
|
MnO |
0.17 |
0.17 |
|
MgO |
7.28 |
9.68 |
|
CaO |
11.42 |
13.31 |
|
Na2O |
2.24 |
1.84 |
|
K2O |
0.525 |
0.028 |
|
P2O5 |
0.28 |
0.03 |
|
Volatiles |
-0.49 |
-0.6 |
|
Total |
99.752 |
100.003 |
|
| Trace elements (ppm, XRF by Edinburgh) | |||
Nb |
19.8 |
0.6 |
|
Zr |
178.3 |
15.7 |
|
Y |
27.9 |
15.9 |
|
Sr |
403.9 |
108.3 |
|
Rb |
9.4 |
0.3 |
|
Th |
1.3 |
bdl |
|
Pb |
2.5 |
3.1 |
|
La |
13.5 |
0.7 |
|
Ce |
39.6 |
3.1 |
|
Nd |
25.8 |
2.5 |
|
Zn |
104.0 |
69.4 |
|
Cu |
138.0 |
123.7 |
|
Ni |
121.9 |
165.4 |
|
Co |
288.8 |
382.2 |
|
Cr |
292.6 |
317.8 |
|
V |
133.6 |
9.0 |
|
Ba |
30.9 |
42.1 |
|
Sc |
21.7 |
16.3 |
|
Ga |
41.3 |
51.7 |
|
| Trace elements (ppm; INAA by Leicester) | |||
La |
36.5 |
||
Ce |
63.6 |
||
Nd |
24.2 |
||
Sm |
4.93 |
||
Eu |
1.44 |
||
Gd |
4.28 |
||
Tb |
0.56 |
||
Yb |
2.01 |
||
Lu |
0.29 |
||
Ta |
1.56 |
||
Th |
8.98 |
||
Hf |
3.55 |
||
Sc |
28.8 |
||
Co |
41.3 |
||
U |
1.8 |
||
Note: XRF = X-ray fluorescence, bdl = below detectable levels, INAA = instrumental neutron activation analysis.