Table 2. Comparison of major-element analyses of glass standards. (Continued on next page.)
| LIPARI | KN18 | |||||||
|---|---|---|---|---|---|---|---|---|
| XRF (J.
Sparks, pers. comm., 1990) |
(Hunt and Hill, 1993) |
(This study) | (Nielson and Sigurdsson, 1981) |
(This study) | ||||
| N = 30 | SD | N = 30 | SD | |||||
SiO2 |
74.03 |
74.35 |
73.94 |
0.20 |
74.60 |
74.77 |
0.36 |
|
TiO2 |
0.08 |
ND |
0.09 |
0.03 |
0.18 |
0.19 |
0.03 |
|
Al2O3 |
12.72 |
12.87 |
12.95 |
0.07 |
10.53 |
10.51 |
0.09 |
|
Fe2O3 |
1.73 |
ND |
ND |
ND |
ND |
0.00 |
||
FeO* |
ND |
1.51 |
1.50 |
0.07 |
3.45 |
3.38 |
0.10 |
|
MnO |
0.08 |
0.07 |
0.07 |
0.04 |
0.06 |
0.06 |
0.03 |
|
MgO |
0.00 |
0.05 |
0.05 |
0.02 |
ND |
0.01 |
0.01 |
|
CaO |
0.72 |
0.74 |
0.73 |
0.04 |
0.15 |
0.15 |
0.06 |
|
Na2O |
4.06 |
3.93 |
4.25 |
0.04 |
5.68 |
5.65 |
0.05 |
|
K2O |
5.18 |
5.11 |
5.10 |
0.07 |
4.39 |
4.28 |
0.07 |
|
P2O5 |
ND |
ND |
ND |
ND |
0.03 |
0.02 |
||
LOI |
1.04 |
|||||||
Total |
99.64 |
98.63 |
98.68 |
99.04 |
99.03 |
|||