James M T Lewis

James M T Lewis

  • NASA FELLOW
  • 301.286.0276
  • NASA/GSFC
  • Mail Code: 699
  • Greenbelt , MD 20771
  • Employer: HOWARD UNIV
  • Brief Bio

    James Lewis is an organic geochemist and geologist with an interest in organic-mineral interactions, the operation of flight instruments, and the interpretation of downlinked data. He specialises in evolved gas analysis (EGA), gas chromatography-mass spectrometry (GC-MS) and has experience in X-ray diffraction (XRD), infrared spectroscopy, and scanning electron microscopy (SEM). Lewis completed a Masters in Science degree and a Ph.D. at Imperial College London (MSci., 2011; Ph.D., 2016). He was supervised by Professor Mark Sephton and investigated the influence of iron sulfates on thermal experiments looking for organic matter on Mars. In 2016, he joined the Planetary Environments Laboratory (code 699) at NASA Goddard Space Flight Center as part of the Sample Analysis at Mars (SAM) instrument suite team. His current research focuses on organic and mineralogical analyses of iron, sulfur, and chlorine minerals and organic salts by SAM and the detection of carboxylic acids in the icy crusts of ocean worlds.   

    Selected Publications

    Refereed

    Mcadam, A. C., B. Sutter, P. D. Archer, et al. H. B. Franz, G. Wong, J. M. Lewis, J. L. Eigenbrode, J. C. Stern, C. A. Knudson, J. Clark, S. Andrejkovicova, D. Ming, R. Morris, C. N. Achilles, E. Rampe, T. Bristow, R. Navarro-Gonzalez, P. R. Mahaffy, L. Thompson, R. Gellert, A. Williams, C. House, and S. Johnson. 2020. "Constraints on the Mineralogy and Geochemistry of the Vera Rubin ridge, Gale Crater, Mars, from Mars Science Laboratory Sample Analysis at Mars Evolved Gas Analyses." Journal of Geophysical Research: Planets, (Submitted)

    Wong, G., J. M. Lewis, C. A. Knudson, et al. M. Millan, A. C. Mcadam, J. L. Eigenbrode, S. Andrejkovičová, F. Gómez, R. Navarro-González, and C. House. 2020. "Detection of reduced sulfur on Vera Rubin ridge by quadratic discriminant analysis of volatiles observed during evolved gas analysis." Journal of Geophysical Research: Planets, (Submitted)

    Franz, H. B., P. R. Mahaffy, C. R. Webster, et al. G. J. Flesch, E. Raaen, C. Freissinet, S. K. Atreya, C. House, A. C. Mcadam, C. A. Knudson, P. D. Archer, J. C. Stern, A. Steele, B. Sutter, J. L. Eigenbrode, D. P. Glavin, J. M. Lewis, C. A. Malespin, M. Millan, D. W. Ming, R. Navarro-González, and R. E. Summons. 2020. "C & O Isotopes at Gale crater, Mars: Implications for Indigenous Organics and Surface-Atmosphere Cycling." Nature Astronomy, (Accepted)

    Williams, A. J., J. L. Eigenbrode, M. A. Floyd, et al. M. Wilhelm, S. O’Reilly, S. S. Johnson, K. L. Craft, C. A. Knudson, S. Andrejkovičová, J. M. Lewis, A. Buch, D. P. Glavin, C. Freissinet, R. Summons, A. C. Mcadam, K. Benison, R. Navarro-González, C. A. Malespin, and P. Mahaffy. 2019. "Recovery of Fatty Acids from Mineralogic Mars Analogs by TMAH Thermochemolysis for the Sample Analysis at Mars Wet Chemistry Experiment on the Curiosity Rover." Astrobiology, 19 (4): [Full Text (Link)] [10.1089/ast.2018.1819]

    D'Arcy, M., P. J. Mason, D. C. Roda-Boluda, et al. A. C. Whittaker, J. M. Lewis, and J. Najorka. 2018. "Alluvial fan surface ages recorded by Landsat-8 imagery in Owens Valley, California." Remote Sensing of Environment, 216: 401-414 [10.1016/j.rse.2018.07.013]

    Lewis, J. M., J. Najorka, J. S. Watson, and M. A. Sephton. 2018. "The Search for Hesperian Organic Matter on Mars: Pyrolysis Studies of Sediments Rich in Sulfur and Iron." Astrobiology, 18 (4): 454-464 [10.1089/ast.2017.1717]

    Brief Bio

    James Lewis is an organic geochemist and geologist with an interest in organic-mineral interactions, the operation of flight instruments, and the interpretation of downlinked data. He specialises in evolved gas analysis (EGA), gas chromatography-mass spectrometry (GC-MS) and has experience in X-ray diffraction (XRD), infrared spectroscopy, and scanning electron microscopy (SEM). Lewis completed a Masters in Science degree and a Ph.D. at Imperial College London (MSci., 2011; Ph.D., 2016). He was supervised by Professor Mark Sephton and investigated the influence of iron sulfates on thermal experiments looking for organic matter on Mars. In 2016, he joined the Planetary Environments Laboratory (code 699) at NASA Goddard Space Flight Center as part of the Sample Analysis at Mars (SAM) instrument suite team. His current research focuses on organic and mineralogical analyses of iron, sulfur, and chlorine minerals and organic salts by SAM and the detection of carboxylic acids in the icy crusts of ocean worlds.   

    Selected Publications

    Refereed

    Mcadam, A. C., B. Sutter, P. D. Archer, et al. H. B. Franz, G. Wong, J. M. Lewis, J. L. Eigenbrode, J. C. Stern, C. A. Knudson, J. Clark, S. Andrejkovicova, D. Ming, R. Morris, C. N. Achilles, E. Rampe, T. Bristow, R. Navarro-Gonzalez, P. R. Mahaffy, L. Thompson, R. Gellert, A. Williams, C. House, and S. Johnson. 2020. "Constraints on the Mineralogy and Geochemistry of the Vera Rubin ridge, Gale Crater, Mars, from Mars Science Laboratory Sample Analysis at Mars Evolved Gas Analyses." Journal of Geophysical Research: Planets (Submitted)

    Wong, G., J. M. Lewis, C. A. Knudson, et al. M. Millan, A. C. Mcadam, J. L. Eigenbrode, S. Andrejkovičová, F. Gómez, R. Navarro-González, and C. House. 2020. "Detection of reduced sulfur on Vera Rubin ridge by quadratic discriminant analysis of volatiles observed during evolved gas analysis." Journal of Geophysical Research: Planets (Submitted)

    Franz, H. B., P. R. Mahaffy, C. R. Webster, et al. G. J. Flesch, E. Raaen, C. Freissinet, S. K. Atreya, C. House, A. C. Mcadam, C. A. Knudson, P. D. Archer, J. C. Stern, A. Steele, B. Sutter, J. L. Eigenbrode, D. P. Glavin, J. M. Lewis, C. A. Malespin, M. Millan, D. W. Ming, R. Navarro-González, and R. E. Summons. 2020. "C & O Isotopes at Gale crater, Mars: Implications for Indigenous Organics and Surface-Atmosphere Cycling." Nature Astronomy (Accepted)

    Williams, A. J., J. L. Eigenbrode, M. A. Floyd, et al. M. Wilhelm, S. O’Reilly, S. S. Johnson, K. L. Craft, C. A. Knudson, S. Andrejkovičová, J. M. Lewis, A. Buch, D. P. Glavin, C. Freissinet, R. Summons, A. C. Mcadam, K. Benison, R. Navarro-González, C. A. Malespin, and P. Mahaffy. 2019. "Recovery of Fatty Acids from Mineralogic Mars Analogs by TMAH Thermochemolysis for the Sample Analysis at Mars Wet Chemistry Experiment on the Curiosity Rover." Astrobiology 19 (4): [Full Text (Link)] [10.1089/ast.2018.1819]

    D'Arcy, M., P. J. Mason, D. C. Roda-Boluda, et al. A. C. Whittaker, J. M. Lewis, and J. Najorka. 2018. "Alluvial fan surface ages recorded by Landsat-8 imagery in Owens Valley, California." Remote Sensing of Environment 216 401-414 [10.1016/j.rse.2018.07.013]

    Lewis, J. M., J. Najorka, J. S. Watson, and M. A. Sephton. 2018. "The Search for Hesperian Organic Matter on Mars: Pyrolysis Studies of Sediments Rich in Sulfur and Iron." Astrobiology 18 (4): 454-464 [10.1089/ast.2017.1717]

                                                                                                                                                                                            
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