0000000000798228

AUTHOR

Gerlind Dreibus

showing 4 related works from this author

Chemistry and mineralogy of outcrops at Meridiani Planum

2005

Analyses of outcrops created by the impact craters Endurance, Fram and Eagle reveal the broad lateral continuity of chemical sediments at the Meridiani Planum exploration site on Mars. Approximately ten mineralogical components are implied in these salt-rich silicic sediments, from measurements by instruments on the Opportunity rover. Compositional trends in an apparently intact vertical stratigraphic sequence at the Karatepe West ingress point at Endurance crater are consistent with non-uniform deposition or with subsequent migration of mobile salt components, dominated by sulfates of magnesium. Striking variations in Cl and enrichments of Br, combined with diversity in sulfate species, pr…

Meridiani PlanumOutcropGeochemistrySilicicMineralogychemistry.chemical_compoundIgneous rockGeophysicschemistryImpact craterSpace and Planetary ScienceGeochemistry and PetrologyEarth and Planetary Sciences (miscellaneous)Sedimentary rockSulfateMaficGeologyEarth and Planetary Science Letters
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Bounce Rock-A shergottite-like basalt encountered at Meridiani Planum, Mars

2011

Additional co-authors: Thanasis ECONOMOU, Steven P. GOREVAN, Brian C. HAHN, Gostar KLINGELHOFER, Timothy J. McCOY, Harry Y. McSWEEN Jr, Douglas W. MING, Richard V. MORRIS, Daniel S. RODIONOV, Steven W. SQUYRES, Heinrich WANKE, Shawn P. WRIGHT, Michael B. WYATT, Albert S. YEN

BasaltMeridiani PlanumGeophysicsWater on MarsSpace and Planetary ScienceComposition of MarsMars Exploration ProgramGeologyAstrobiologyMeteoritics & Planetary Science
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Alpha Particle X-Ray Spectrometer (APXS): Results from Gusev crater and calibration report

2006

The chemical composition of rocks and soils on Mars analyzed during the Mars Exploration Rover Spirit Mission was determined by X-ray analyses with the Alpha Particle X-Ray Spectrometer (APXS). Details of the data analysis method and the instrument calibration are presented. Measurements performed on Mars to address geometry effects and background contributions are shown. Cross calibration measurements among several instrument sensors and sources are discussed. An unintentional swap of the two flight instruments is evaluated. New concentration data acquired during the first 470 sols of rover Spirit in Gusev Crater are presented. There are two geological regions, the Gusev plains and the Col…

Meridiani PlanumAtmospheric Sciencegeographygeography.geographical_feature_categoryEcologyPaleontologySoil ScienceMineralogyForestryWeatheringMars Exploration ProgramAquatic ScienceAlpha particle X-ray spectrometerOceanographyVolcanic rockGeophysicsImpact craterSpace and Planetary ScienceGeochemistry and PetrologyRocknestEarth and Planetary Sciences (miscellaneous)Composition of MarsGeologyEarth-Surface ProcessesWater Science and TechnologyJournal of Geophysical Research: Planets
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The new Athena alpha particle X-ray spectrometer for the Mars Exploration Rovers

2003

[1] The new alpha particle X-ray spectrometer (APXS) is part of the Athena payload of the two Mars Exploration Rovers (MER). The APXS sensor head is attached to the turret of the instrument deployment device (IDD) of the rover. The APXS is a very light-weight instrument for determining the major and minor elemental composition of Martian soils, rocks, and other geological materials at the MER landing sites. The sensor head has simply to be docked by the IDD on the surface of the selected sample. X-ray radiation, excited by alpha particles and X rays of the radioactive sources, is recorded by a high-resolution X-ray detector. The X-ray spectra show elements starting from sodium up to yttrium…

MartianMeridiani PlanumAtmospheric ScienceEcologySpectrometerPaleontologySoil ScienceMineralogyForestryAlpha particleMars Exploration ProgramAquatic ScienceAlpha particle X-ray spectrometerOceanographyExploration of MarsAstrobiologyGeophysicsSpace and Planetary ScienceGeochemistry and PetrologyEarth and Planetary Sciences (miscellaneous)Composition of MarsGeologyEarth-Surface ProcessesWater Science and TechnologyJournal of Geophysical Research: Planets
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