0000000000798019

AUTHOR

D. C. Golden

showing 2 related works from this author

Geochemical and mineralogical indicators for aqueous processes in the Columbia Hills of Gusev crater, Mars

2006

[1] Water played a major role in the formation and alteration of rocks and soils in the Columbia Hills. The extent of alteration ranges from moderate to extensive. Five distinct rock compositional classes were identified; the order for degree of alteration is Watchtower ≅ Clovis > Wishstone ≅ Peace > Backstay. The rover's wheels uncovered one unusual soil (Paso Robles) that is the most S-rich material encountered. Clovis class rocks have compositions similar to Gusev plains soil but with higher Mg, Cl, and Br and lower Ca and Zn; Watchtower and Wishstone classes have high Al, Ti, and P and low Cr and Ni; Peace has high Mg and S and low Al, Na, and K; Backstay basalts have high Na and K comp…

Atmospheric ScienceGeochemistrySoil ScienceMineralogyPyroxeneAquatic Scienceengineering.materialOceanographyFeldsparGeochemistry and PetrologyEarth and Planetary Sciences (miscellaneous)Composition of MarsAllophaneEarth-Surface ProcessesWater Science and TechnologyBasaltgeographygeography.geographical_feature_categoryOlivineEcologyPaleontologyForestryVolcanic rockGeophysicsSpace and Planetary Sciencevisual_artengineeringvisual_art.visual_art_mediumIlmeniteGeologyJournal of Geophysical Research: Planets
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Identification of carbonate-rich outcrops on Mars by the Spirit rover.

2010

Ancient Carbonate Minerals on Mars The historical presence of liquid water on Mars together with a CO 2 -rich atmosphere should have resulted in the accumulation of large deposits of carbonate minerals. Yet, evidence for the presence of carbonates on the surface of Mars has been scarce. Using data collected by the Mars Exploration Rover, Spirit, Morris et al. (p. 421 , published online 3 June; see the Perspective by Harvey ) now present evidence for carbonate-rich outcrops in the Comanche outcrops within the Gusev crater. The carbonate is a major outcrop component and may have formed in the Noachian era (∼4 billion years ago) by precipitation from hydrothermal solutions that passed through …

MartianMultidisciplinaryWater on MarsExtraterrestrial EnvironmentAtmosphereClimateNoachianCarbonate mineralsCarbonatesTemperatureMarsWaterMars Exploration ProgramMeteoroidsCarbon DioxideAstrobiologychemistry.chemical_compoundImpact craterMeteoritechemistryCarbonateMagnesiumFerrous CompoundsSpacecraftGeologyScience (New York, N.Y.)
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