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Browsing by Author "Gellert, Ralf"

Browsing by Author "Gellert, Ralf"

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  • Bounce Rock-A shergottite-like basalt encountered at Meridiani Planum, Mars 
    Zipfel, Jutta; SchröDer, Christian; Jolliff, Bradley L.; Gellert, Ralf; Herkenhoff, Kenneth E.; Rieder, Rudolf; Anderson, Robert; Bell, James F., III; Brückner, Johannes; Crisp, Joy A.; Christensen, Philip R.; Clark, Benton C.; De Souza, Paulo A.,Jr.; Dreibus, Gerlind; D'Uston, Claude; Economou, Thanasis; Gorevan, Steven P.; Hahn, Brian C.; Klingelhöfer, Göstar; McCoy, Timothy J.; McSween, Harry Y.; Ming, Douglas W.; Morris, Richard V.; Rodionov, Daniel S.; Squyres, Steven W.; Wänke, Heinrich; Wright, Shawn P.; Wyatt, Michael B.; Yen, Albert S. (2011)
  • Diverse Lithologies and Alteration Events on the Rim of Noachian-Aged Endeavour Crater, Meridiani Planum, Mars: In Situ Compositional Evidence 
    Mittlefehldt, David W.; Gellert, Ralf; Ming, Douglas W.; Yen, Albert S.; Clark, Benton C.; Morris, Richard V.; Schroder, Christian; Crumpler, Larry S.; Grant, John A.; Jolliff, Bradley L.; Arvidson, Raymond E.; Farrand, William H.; Herkenhoff, Kenneth E.; Bell, James F., III; Cohen, Barbara A.; Klingelhoefer, Goestar; Schrader, Christian M.; Rice, James W. (2018)
    We report the results of geological studies by the Opportunity Mars rover on the Endeavour Crater rim. Four major units occur in the region (oldest to youngest): the Matijevic, Shoemaker, Grasberg, and Burns formations. ...
  • Geology and Geochemistry of Noachian Bedrock and Alteration Events, Meridiani Planum, Mars: MER Opportunity Observations 
    Mittlefehldt, David W.; Gellert, Ralf; vanBommel, Scott; Arvidson, Raymond E.; Ashley, James W.; Clark, Benton C.; Crumpler, Larry S.; Farrand, William H.; Golombek, Matthew P.; Grant, John A.; Morris, Richard, V.; Schroder, Christian (2021)
    We have used Mars Exploration Rover Opportunity data to investigate the origin and alteration of lithic types along the western rim of Noachian-aged Endeavour crater on Meridiani Planum. Two geologic units are identified ...
  • Overview of Mars surface geochemical diversity through Alpha Particle X-Ray Spectrometer data multidimensional analysis: First attempt at modeling rock alteration 
    Treguier, Erwan; d'Uston, Claude; Pinet, Patrick C.; Berger, Gilles; Toplis, Michael J.; McCoy, Timothy J.; Gellert, Ralf; Bruecker, Johannes (2008)
    Principal component analysis and a hierarchical clustering method have been employed to describe and quantify the compositional variability of Martian rocks and soils measured by the Alpha Particle X-Ray Spectrometers ...
  • Water alteration of rocks and soils on Mars at the Spirit rover site in Gusev crater 
    Haskin, Larry A.; Wang, Alian; Jolliff, Bradley L.; McSween, Harry Y.; Clark, Benton C.; Des Marais, David J.; McLennan, Scott M.; Tosca, Nicholas J.; Hurowitz, Joel A.; Farmer, Jack D.; Yen, Albert; Squyres, Steven W.; Arvidson, Raymond E.; Klingelhöfer, Göstar; Schroder, Christian; de Souza, Paulo A.; Ming, Douglas W.; Gellert, Ralf; Zipfel, Jutta; Brückner, Johannes; Bell, James F., III; Herkenhoff, Kenneth E.; Christensen, Philip R.; Ruff, Steve; Blaney, Diana L.; Gorevan, Steven; Cabrol, Nathalie A.; Crumpler, Larry S.; Grant, John A.; Soderblom, Lawrence (2005)
    Gusev crater was selected as the landing site for the Spirit rover because of the possibility that it once held a lake. Thus one of the rover's tasks was to search for evidence of lake sediments. However, the plains ...

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