|
Composition
|
Sample
|
< 1 μm
|
< 2.5 μm
|
< 4 μm
|
< 10 μm
|
< 100 μm
|
SSA
|
|---|
|
Basalt
|
Katla-1755
|
0.05
|
0.55
|
0.99
|
2.63
|
33.00
|
0.41
|
|
Laki-SnVII
|
0.65
|
3.00
|
5.07
|
11.40
|
60.74
|
1.00
|
|
Laki-SnV
|
0.35
|
1.22
|
1.90
|
4.72
|
54.12
| |
|
Reyk-1227
|
0.00
|
0.13
|
0.27
|
1.13
|
27.32
| |
|
Veid-1477
|
0.00
|
0.00
|
0.00
|
0.00
|
70.44
| |
|
Basaltic-Andesite
|
Hekla-1980
|
0.00
|
0.27
|
0.54
|
1.80
|
55.87
|
0.45
|
|
Dacite
|
Askja-59b
|
0.21
|
1.38
|
2.59
|
7.39
|
54.97
|
0.60
|
|
Askja-55d
|
0.17
|
1.28
|
2.47
|
7.36
|
46.05
| |
|
Askja-56a
|
0.21
|
1.39
|
2.64
|
7.85
|
49.93
| |
|
Rhyolite
|
Orae-s1
|
0.39
|
2.12
|
3.86
|
10.51
|
62.03
|
0.90
|
|
Orae-s13
|
0.26
|
1.51
|
2.74
|
7.66
|
55.61
| |
|
Hekla-4
|
1.28
|
6.59
|
11.26
|
26.91
|
77.01
|
1.64
|
- Particle size data are presented as cumulative volume % (of 2 mm) for health-relevant fractions. Specific surface area (SSA) data are m2 g−1. Samples are ordered according to increasing SiO2 content. All data are averages of three discrete analyses
