urn:nasa:pds:mer_apxs_composites_library:data:mer_apxs_composites_oxides 1.1 1.20.0.0 Product_Observational Knight, A. L.; VanBommel, S. J.; Gellert, R. 2024 10.17189/fmmx-db70 This table contains major, minor, and select trace element concentrations from composite spectra from the Alpha Particle X-ray Spectrometers on Mars Exploration Rovers 1 and 2 (Opportunity and Spirit). 2025-11-03 1.1 Updated external references and investigation area name. 2024-06-06 1.0 Initial version 2004-01-05Z 2018-06-10Z Science Calibrated Surface Geosciences Mars Exploration Rovers: Spirit and Opportunity Mission urn:nasa:pds:context:investigation:mission.mars_exploration_rover data_to_investigation Mars Exploration Rover 1 Host urn:nasa:pds:context:instrument_host:spacecraft.mer1 is_instrument_host Alpha Particle X-ray Spectrometer Instrument urn:nasa:pds:context:instrument:apxs.mer1 is_instrument Mars Exploration Rover 2 Host urn:nasa:pds:context:instrument_host:spacecraft.mer2 is_instrument_host Alpha Particle X-ray Spectrometer Instrument urn:nasa:pds:context:instrument:apxs.mer2 is_instrument Mars Planet urn:nasa:pds:context:target:planet.mars data_to_target 10.1029/2003JE002150 Rieder, R., et al., The new Athena Alpha Particle X-Ray Spectrometer (APXS) for the Mars Exploration Rovers, Journal of Geophysical Research, 2003. 10.1029/2005JE002555 Gellert, R., et al., Alpha Particle X-Ray Spectrometer (APXS): Results from Gusev crater and calibration report, Journal of Geophysical Research, 2006. 10.1029/2021JE006915 Mittlefehldt, D. W., et al., Geology and geochemistry of Noachian bedrock and alteration events, Meridiani Planum, Mars: MER Opporunity observations, Journal of Geophysical Research: Planets, 2021. 10.1029/2008JE003195 Ming, D. W., et al., Geochemical properties of rocks and soils in Gusev Crater, Mars: Results of the Alpha Particle X-Ray Spectrometer from Cumberland Ridge to Home Plate, Journal of Geophysical Research, 2008. 10.1029/2024JE008569 Knight, A. L., VanBommel, S. J., Gellert, R., Berger, J. A., Catalano, J. G., Gross, J., and Christian, J. R. (2025). Gallium and germanium concentrations from the MER Alpha Particle X-ray Spectrometers: Evidence of global trace element enrichment. Journal of Geophysical Research: Planets, 130, e2024JE008569. mer_apxs_composites_oxides.csv

Column Headings 0 241 7-Bit ASCII Text The header is the first row in the file and contains column headings.

MER APXS Composite Spectra Oxide Concentrations 241 PDS DSV 1 42 Carriage-Return Line-Feed Comma 37 0 Composite Number 1 ASCII_Integer Number indicating the composite spectrum Na2O 2 ASCII_Real Derived weight percent for Na2O Na2O_error 3 ASCII_Real Estimated precision error for Na2O MgO 4 ASCII_Real Derived weight percent for MgO MgO_error 5 ASCII_Real Estimated precision error for MgO Al2O3 6 ASCII_Real Derived weight percent for Al2O3 Al2O3_error 7 ASCII_Real Estimated precision error for Al2O3 SiO2 8 ASCII_Real Derived weight percent for SiO2 SiO2_error 9 ASCII_Real Estimated precision error for SiO2 P2O5 10 ASCII_Real Derived weight percent for P2O5 P2O5_error 11 ASCII_Real Estimated precision error for P2O5 SO3 12 ASCII_Real Derived weight percent for SO3 SO3_error 13 ASCII_Real Estimated precision error for SO3 Cl 14 ASCII_Real Derived weight percent for Cl Cl_error 15 ASCII_Real Estimated precision error for Cl K2O 16 ASCII_Real Derived weight percent for K2O K2O_error 17 ASCII_Real Estimated precision error for K2O CaO 18 ASCII_Real Derived weight percent for CaO CaO_error 19 ASCII_Real Estimated precision error for CaO TiO2 20 ASCII_Real Derived weight percent for TiO2 TiO2_error 21 ASCII_Real Estimated precision error for TiO2 Cr2O3 22 ASCII_Real Derived weight percent for Cr2O3 Cr2O3_error 23 ASCII_Real Estimated precision error for Cr2O3 MnO 24 ASCII_Real Derived weight percent for MnO MnO_error 25 ASCII_Real Estimated precision error for MnO FeO 26 ASCII_Real Derived weight percent for FeO FeO_error 27 ASCII_Real Estimated precision error for FeO Ni 28 ASCII_Integer Derived weight percent in ppm (ug/g) for Ni Ni_error 29 ASCII_Integer Estimated precision error for Ni Zn 30 ASCII_Integer Derived weight percent in ppm (ug/g) for Zn Zn_error 31 ASCII_Integer Estimated precision error for Zn Ga 32 ASCII_Integer Derived weight percent in ppm (ug/g) for Ga Ga_error 33 ASCII_Integer Estimated precision error for Ga Ge 34 ASCII_Integer Derived weight percent in ppm (ug/g) for Ge Ge_error 35 ASCII_Integer Estimated precision error for Ge Br 36 ASCII_Integer Derived weight percent in ppm (ug/g) for Br Br_error 37 ASCII_Integer Estimated precision error for Br