Browsing FAS Scholarly Articles by Keyword "geochemistry"

Now showing items 1-5 of 5

    • Geochemical Modeling of Evaporation Processes on Mars: Insight from the Sedimentary Record at Meridiani Planum 

      Tosca, Nicholas J.; McLennan, Scott M.; Clark, Benton C.; Grotzinger, John P.; Hurowitz, Joel A.; Knoll, Andrew; Schroder, Christian; Squyres, Steven W. (Elsevier, 2005)
      New data returned from the Mars Exploration Rover (MER) mission have revealed abundant evaporites in the sedimentary record at Meridiani Planum. A working hypothesis for Meridiani evaporite formation involves the evaporation ...

    • High concentrations of manganese and sulfur in deposits on Murray Ridge, Endeavour Crater, Mars 

      Arvidson, Raymond E.; Squyres, Steven W.; Morris, Richard V.; Knoll, Andrew Herbert; Gellert, Ralf; Clark, Benton C.; Catalano, Jeffrey G.; Jolliff, Brad L.; McLennan, Scott M.; Herkenhoff, Kenneth E.; VanBommel, Scott; Mittlefehldt, David W.; Grotzinger, John P.; Guinness, Edward A.; Johnson, Jeffrey R.; Bell, James F.; Farrand, William H.; Stein, Nathan; Fox, Valerie K.; Golombek, Matthew P.; Hinkle, Margaret A.G.; Calvin, Wendy M.; de Souza, Paulo A. (Mineralogical Society of America, 2016)
      Mars Reconnaissance Orbiter HiRISE images and Opportunity rover observations of the ~22 km wide Noachian age Endeavour Crater on Mars show that the rim and surrounding terrains were densely fractured during the impact ...

    • Origins of Chemical Diversity of Back-Arc Basin Basalts: A Segment-Scale Study of the Eastern Lau Spreading Center 

      Bézos, Antoine; Escrig, Stéphane; Langmuir, Charles H.; Michael, Peter J.; Asimow, Paul D. (American Geophysical Union, 2009)
      We report major, trace, and volatile element data on basaltic glasses from the northernmost segment of the Eastern Lau Spreading Center (ELSC1) in the Lau back-arc basin to further test and constrain models of back-arc ...

    • Sedimentary talc in Neoproterozoic carbonate successions 

      Tosca, Nicholas; Macdonald, Francis Alexander; Strauss, Justin Vincent; Johnston, David T; Knoll, Andrew Herbert (Elsevier BV, 2011)
      Mineralogical, petrographic and sedimentological observations document early diagenetic talc in carbonate-dominated successions deposited on two early Neoproterozoic (~ 800–700 million years old) platform margins. In the ...

    • Volcanic Glasses at the Izu Arc Volcanic Front: New Perspectives on Fluid and Sediment Melt Recycling in Subduction Zones 

      Straub, S.M; Layne, G.D.; Schmidt, A.; Langmuir, Charles (American Geophysical Union, 2004)
      Volcanic glasses contained in distal fallout tephras from the Izu arc volcanic front (Izu VF) provide unique perspectives on general problems of arc volcanism. Unlike cogenetic lavas, these glasses are liquid compositions ...