| Tables below reproduced from Sheppard, D.S., LeGuern, F.,
and Christenson, B.W., 1994, Composition and mass fluxes of the Mount Erebus
Volcano plume, in Kyle, P.R., ed., Volcanological and Environmental Studies
of Mount Erebus, Antarctica, Volume 66: Washington D.C., American Geophysical
Union, p. 83-96. |
|
Observations From SEM/EDAX Examinations of Particulates Collected on the Four-Stage Casella Cascade Impactor on January 2, 1990. |
|||||||||||||||||
|
Normal Size
Range, um |
Maximum
Particle Size Observed, um |
Nature
|
Core Composition
|
Surface
Composition |
Comments
|
||||||||||||
|
|
|||||||||||||||||
|
0.4 to 0.7
|
6
|
Shards and grains
|
Mostly silicate?
|
Fe, S, Cu, Cl, Na, K, Si. Up to 70% Cu, 35% Pb, 35% Fe,
25% S on surfaces
|
Much very fine material, less than 0.1 um.
|
||||||||||||
|
0.7 to 2.0
|
8
|
Shards and grains
|
Silicates and salts
Splattered droplet |
Si, Cl, S, Cu, K, Ca, Mg
Cl, S, Fe, Na, Si |
|||||||||||||
|
2.0 to 7.0
|
Rounded grains, agglomerates
|
Salts?
Silicates Apatite |
Pb, S, Al, Cu, Na, Si, K
Cl, Ca, S Ca, P |
||||||||||||||
|
7.0 to 20
|
>100
|
|
|
|
Largely clear slide with large grains usually coated with
smaller grains
|
||||||||||||
|
|
|||||||||||||||||
|
Elemental Quantities on Particulates Collected on the Different Stages of the Casella Cascade Impactor on January 2, 1990, as Determined by PIXE Analysis. |
||||
|
Element
|
0.4-0.7 um
|
0.7-2 um
|
2-7 um
|
7-20 um
|
|
|
||||
|
Si
|
18.7
|
18.2
|
17.9
|
91.2
|
|
K
|
288.4
|
36.7
|
11.2
|
17.3
|
|
Ca
|
2.3
|
1.9
|
13.8
|
|
|
Fe
|
12.8
|
3.7
|
3.2
|
12.6
|
|
P
|
1.4
|
11.4
|
||
|
S
|
258.2
|
54.4
|
10.9
|
10.9
|
|
Cl
|
159.7
|
21.3
|
12.7
|
12.9
|
|
Ti
|
0.7
|
0.23
|
4.21
|
1.76
|
|
V
|
0.06
|
|||
|
Cr
|
0.06
|
|||
|
Co
|
0.01
|
0.19
|
||
|
Ni
|
0.02
|
0.01
|
0.35
|
0.21
|
|
Cu
|
0.18
|
0.08
|
1.64
|
|
|
As
|
3.48
|
|||
|
Br
|
5.45
|
0.44
|
||
|
Rb
|
1.51
|
0.34
|
||
|
Zr
|
0.91
|
|||
|
Hg
|
0.20
|
|||
|
Pb
|
24.58
|
2.88
|
0.93
|
0.30
|
|
|
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