Supplemental table for October, 2006 PSRD article, LIBS: Remote Chemical Analysis.
For each Martian meteorite Dag 476 and Zagami and the andesite powder standard JA-2: there are three columns showing a LIBS average composition, the average of several published chemical analyses, and the percent difference between these two. The rows indicate the major oxides analyzed. In general, the LIBS results were within 10% of the oxide compositions reported in the literature.
|
DaG 476 |
Zagami |
JA-2 Andesite |
Oxide |
LIBS Avg. |
Literature |
% Difference |
LIBS Avg. |
Literature |
% Difference |
LIBS Avg. |
Literature |
% Difference |
SiO2 |
49.63 |
47.46 |
4.6 |
52.92 |
50.86 |
4.0 |
54.82 |
56.18 |
2.5 |
FeO |
15.16 |
16.58 |
8.6 |
17.11 |
17.88 |
4.3 |
(Fe2O3T) 6.22 |
6.14 |
1.2 |
CaO |
6.31 |
7.11 |
11.2 |
9.91 |
10.39 |
4.6 |
6.69 |
6.48 |
3.3 |
MgO |
18.74 |
19.84 |
5.5 |
10.83 |
11.24 |
3.6 |
7.86 |
7.68 |
2.4 |
Al2O3 |
5.03 |
4.28 |
17.5 |
5.56 |
5.96 |
6.8 |
14.62 |
15.32 |
4.6 |
Na2O |
0.66 |
0.55 |
19.8 |
0.68 |
0.9 |
24.1 |
4.61 |
3.08 |
39.7 |
TiO2* |
0.66 |
0.37 |
79.4 |
1.02 |
0.79 |
28.5 |
0.73 |
0.67 |
8.3 |
|
* Thompson, Wiens, and colleagues note that the TiO2 signal is currently near the detection limit.
Reference:
- Thompson, J. R., R. C. Wiens, J. E. Barefield, D. T. Vaniman, H. E. Newsom, and S. M. Clegg (2006) Remote Laser-Induced Breakdown Spectroscopy Analyses of Dar al Gani 476 and Zagami Martian Meteorites. Journal of Geophysical Research, v. 111, doi: 1029/2005JE002578,2006.
RETURN to PSRD article, "LIBS: Remote Chemical Analysis."