Mars Pathfinder APXS results page Mars Pathfinder science results page Mars Pathfinder home page at NSSDCA
| Element | A-2, Soil | A-4, Soil | A-5, Soil | A-3, Rock "Barnacle Bill" |
A-7, Rock "Yogi" |
| weight % | weight % | weight % | weight % | weight % | |
| C (Carbon) (note 2) | - | - | - | - | - |
| O (Oxygen) (notes 2,3) | 42.5 | 43.9 | 43.2 | 45.0 | 44.6 |
| Na (Sodium) | 3.2 | 3.8 | 2.6 | 3.1 | 1.9 |
| Mg (Magnesium) | 5.3 | 5.5 | 5.2 | 1.9 | 3.8 |
| Al (Aluminum) | 4.2 | 5.5 | 5.4 | 6.6 | 6.0 |
| Si (Silicon) | 21.6 | 20.2 | 20.5 | 25.7 | 23.8 |
| P (Phosphorus) | - | 1.5 | 1.0 | 0.9 | 0.9 |
| S (Sulfur) | 1.7 | 2.5 | 2.2 | 0.9 | 1.7 |
| Cl (Chlorine) | - | 0.6 | 0.6 | 0.5 | 0.6 |
| K (Potassium) (note 4) | 0.5 | 0.6 | 0.6 | 1.2 | 0.9 |
| Ca (Calcium) | 4.5 | 3.4 | 3.8 | 3.3 | 4.2 |
| Ti (Titanium) | 0.6 | 0.7 | 0.4 | 0.4 | 0.5 |
| Cr (Chromium) | 0.2 | 0.3 | 0.3 | 0.1 | 0.0 |
| Mn (Manganese) (note 4) | 0.4 | 0.4 | 0.5 | 0.7 | 0.4 |
| Fe (Iron) | 15.2 | 11.2 | 13.6 | 9.9 | 10.7 |
| Ni (Nickel) | - | - | 0.1 | - | - |
| Sum | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
Notes:
(1) Analysis based on X-ray data.
(2) Direct results on C and O will be available from the analysis of
alpha spectra at a later date.
(3) O is calculated from oxide stoichiometry, assuming S in the form
of SO3 and Fe in the form of FeO.
(4) Values for K and Mn are upper limits; more accurate numbers will
be available after further analysis.
| Oxide | A-2, Soil | A-4, Soil | A-5, Soil | A-3, Rock "Barnacle Bill" |
A-7, Rock "Yogi" |
| weight % | weight % | weight % | weight % | weight % | |
| Na2O | 4.3 | 5.1 | 3.6 | 4.2 | 2.5 |
| MgO | 8.7 | 9.0 | 8.6 | 3.1 | 6.3 |
| Al2O3 | 8.0 | 10.4 | 10.1 | 12.4 | 11.4 |
| SiO2 | 46.1 | 43.3 | 43.8 | 55.0 | 50.9 |
| SO3 | 4.3 | 6.2 | 5.4 | 2.2 | 4.2 |
| K2O | 0.6 | 0.7 | 0.7 | 1.4 | 1.1 |
| CaO | 6.3 | 4.8 | 5.3 | 4.6 | 5.8 |
| TiO2 | 1.1 | 1.1 | 0.7 | 0.7 | 0.8 |
| MnO | 0.5 | 0.5 | 0.6 | 0.9 | 0.5 |
| FeO | 19.5 | 14.5 | 17.5 | 12.7 | 13.8 |
Notes:
Analysis based on X-ray data.
Values for potassium and manganese are upper limits; more accurate
numbers will be available after further analysis.
Minor elements such as phosphorus, chlorine and chromium are omitted
from this table.
Mars |
Earth | |||||
| Oxide | A-3, Rock | A-5, Soil | SNCs | Continental Crust | Oceanic Crust | |
| "Barnacle Bill" | (Mars Meteorites) | Average | Sediments | |||
| weight % | weight % | weight % | weight % | weight % | weight % | |
| MgO | 3.1 | 8.6 | 9.3 - 31.6 | 3.1 | 3.1 | 7.7 |
| Al2O3 | 12.4 | 10.1 | 0.7 - 12.0 | 15.2 | 13.0 | 15.6 |
| SiO2 | 55.0 | 43.8 | 38.2 - 52.7 | 60.2 | 50.0 | 50.7 |
| K2O* | 1.4 | 0.7 | 0.022 - 0.19 | 2.9 | 2.0 | 0.17 |
| CaO | 4.6 | 5.3 | 0.6 - 15.8 | 5.5 | 8.4 | 11.4 |
| TiO2 | 0.7 | 0.7 | 0.1 - 1.8 | 0.7 | 0.7 | 1.5 |
| MnO* | 0.9 | 0.6 | 0.44 - 0.55 | 0.1 | 0.1 | 0.16 |
| FeO | 12.7 | 17.5 | 17.6 - 27.1 | 6.05 | 5.5 | 9.9 |
| FeO/MnO | 14.1 | 29.2 | 37.0 - 51.5 | - | - | - |
*Values for potassium (K) and manganese (Mn) are probably too high and subject to revision after further analysis.
Mars Pathfinder APXS results page
Mars Pathfinder science results page
Mars Pathfinder home page at NSSDCA