Search Results - "Eigenbrode, J. L."

Redox stratification of an ancient lake in Gale crater, Mars by Hurowitz, J. A., Grotzinger, J. P., Fischer, W. W., McLennan, S. M., Milliken, R. E., Stein, N., Vasavada, A. R., Blake, D. F., Dehouck, E., Eigenbrode, J. L., Fairén, A. G., Frydenvang, J., Gellert, R., Grant, J. A., Gupta, S., Herkenhoff, K. E., Ming, D. W., Rampe, E. B., Schmidt, M. E., Siebach, K. L., Stack-Morgan, K., Sumner, D. Y., Wiens, R. C.

“…In 2012, NASA's Curiosity rover landed on Mars to assess its potential as a habitat for past life and investigate the paleoclimate record preserved by…”
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The imprint of atmospheric evolution in the D/H of Hesperian clay minerals on Mars by Mahaffy, P. R., Webster, C. R., Stern, J. C., Brunner, A. E., Atreya, S. K., Conrad, P. G., Domagal-Goldman, S., Eigenbrode, J. L., Flesch, G. J., Christensen, L. E., Franz, H. B., Freissinet, C., Glavin, D. P., Grotzinger, J. P., Jones, J. H., Leshin, L. A., Malespin, C., McAdam, A. C., Ming, D. W., Navarro-Gonzalez, R., Niles, P. B., Owen, T., Pavlov, A. A., Steele, A., Trainer, M. G., Williford, K. H., Wray, J. J.

“…The deuterium-to-hydrogen (D/H) ratio in strongly bound water or hydroxyl groups in ancient martian clays retains the imprint of the water of formation of…”
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Radiolysis of Macromolecular Organic Material in Mars-Relevant Mineral Matrices by Fox, A. C., Eigenbrode, J. L., Freeman, K. H.

“…The fate of organic material on Mars after deposition is crucial to interpreting the source of these molecules. Previous work has addressed how various organic…”
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Large Sulphur Isotope Fractionations in Martian Sediments at Gale Crater by Franz, H. B., McAdam, A. C., Ming, D. W., Freissinet, C., Mahaffy, Paul, Eldridge, D. L., Fischer, W. W., Grotzinger, J. P., House, C. H., Hurowitz, J. A., McLennan, S. M., Schwenzer, S. P., Vaniman, D. T., Archer, P. D. Jr, Atreya, S. K., Conrad, P. G., Dottin, J. W. III, Eigenbrode, J. L., Farley, K. A., Glavin, D. P., Johnson, S. S., Knudson, C. A., Morris, R. V., Navarro-Gonzalez, R., Pavlov, A. A., Plummer, R., Rampe, E. B., Stern, J. C., Steele, A., Summons, R. E., Sutter, B.

“…Variability in the sulfur isotopic composition in sediments can reflect atmospheric, geologic and biological processes. Evidence for ancient fluvio-lacustrine…”
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Carbon and sulfur isotopic signatures of ancient life and environment at the microbial scale: Neoarchean shales and carbonates by Williford, K. H., Ushikubo, T., Lepot, K., Kitajima, K., Hallmann, C., Spicuzza, M. J., Kozdon, R., Eigenbrode, J. L., Summons, R. E., Valley, J. W.

“…An approach to coordinated, spatially resolved, in situ carbon isotope analysis of organic matter and carbonate minerals, and sulfur three‐ and four‐isotope…”
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Indigenous and exogenous organics and surface–atmosphere cycling inferred from carbon and oxygen isotopes at Gale crater by Franz, H. B., Mahaffy, P. R., Webster, C. R., Flesch, G. J., Raaen, E., Freissinet, C., Atreya, S. K., House, C. H., McAdam, A. C., Knudson, C. A., Archer, P. D., Stern, J. C., Steele, A., Sutter, B., Eigenbrode, J. L., Glavin, D. P., Lewis, J. M. T., Malespin, C. A., Millan, M., Ming, D. W., Navarro-González, R., Summons, R. E.

“…Since landing at Gale crater, Mars, in August 2012, the Curiosity rover has searched for evidence of past habitability, such as organic compounds, which have…”
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Volatile, Isotope, and Organic Analysis of Martian Fines with the Mars Curiosity Rover by Leshin, L. A., Mahaffy, P. R., Webster, C. R., Cabane, M., Coll, P., Conrad, P. G., Archer, P. D., Atreya, S. K., Brunner, A. E., Buch, A., Eigenbrode, J. L., Flesch, G. J., Franz, H. B., Freissinet, C., Glavin, D. P., McAdam, A. C., Miller, K. E., Ming, D. W., Morris, R. V., Navarro-González, R., Niles, P. B., Owen, T., Pepin, R. O., Squyres, S., Steele, A., Stern, J. C., Summons, R. E., Sumner, D. Y., Sutter, B., Szopa, C., Teinturier, S., Trainer, M. G., Wray, J. J., Grotzinger, J. P.

“…Samples from the Rocknest aeolian deposit were heated to ~835°C under helium flow and evolved gases analyzed by Curiosity's Sample Analysis at Mars instrument…”
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Enceladus: Astrobiology Revisited by Davila, A. F., Eigenbrode, J. L.

“…Astrobiology research seeks to understand how life begins and evolves, and to determine whether life exist elsewhere in the universe. The discovery of diverse…”
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Evolved Gas Analyses of Sedimentary Rocks From the Glen Torridon Clay‐Bearing Unit, Gale Crater, Mars: Results From the Mars Science Laboratory Sample Analysis at Mars Instrument Suite by McAdam, A. C., Sutter, B., Archer, P. D., Franz, H. B., Wong, G. M., Lewis, J. M. T., Clark, J. V., Millan, M., Williams, A. J., Eigenbrode, J. L., Knudson, C. A., Freissinet, C., Glavin, D. P., Stern, J. C., Navarro‐González, R., Achilles, C. N., Ming, D. W., Morris, R. V., Bristow, T. F., Rampe, E. B., Thorpe, M. T., House, C. H., Andrejkovičová, S., Bryk, A. B., Fox, V. K., Johnson, S. S., Mahaffy, P. R., Malespin, C. A.

“…Evolved gas analysis (EGA) data from the Sample Analysis at Mars (SAM) instrument suite indicated Fe‐rich smectite, carbonate, oxidized organics, Fe/Mg…”
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Organic molecules in the Sheepbed Mudstone, Gale Crater, Mars by Freissinet, C., Glavin, D. P., Mahaffy, P. R., Miller, K. E., Eigenbrode, J. L., Summons, R. E., Brunner, A. E., Buch, A., Szopa, C., Archer, P. D., Franz, H. B., Atreya, S. K., Brinckerhoff, W. B., Cabane, M., Coll, P., Conrad, P. G., Des Marais, D. J., Dworkin, J. P., Fairén, A. G., François, P., Grotzinger, J. P., Kashyap, S., Kate, I. L., Leshin, L. A., Malespin, C. A., Martin, M. G., Martin‐Torres, F. J., McAdam, A. C., Ming, D. W., Navarro‐González, R., Pavlov, A. A., Prats, B. D., Squyres, S. W., Steele, A., Stern, J. C., Sumner, D. Y., Sutter, B., Zorzano, M.‐P.

“…The Sample Analysis at Mars (SAM) instrument on board the Mars Science Laboratory Curiosity rover is designed to conduct inorganic and organic chemical…”
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Evolved Gas Analyses of Sedimentary Rocks and Eolian Sediment in Gale Crater, Mars: Results of the Curiosity Rover's Sample Analysis at Mars Instrument from Yellowknife Bay to the Namib Dune by Sutter, B., McAdam, A. C., Mahaffy, P. R., Ming, D. W., Edgett, K. S., Rampe, E. B., Eigenbrode, J. L., Franz, H. B., Freissinet, C., Grotzinger, J. P., Steele, A., House, C. H., Archer, P. D., Malespin, C. A., Navarro-González, R., Stern, J. C., Bell, J. F., Calef, F. J., Gellert, R., Glavin, D. P., Thompson, L. M., Yen, A. S.

“…The sample analysis at Mars instrument evolved gas analyzer (SAM-EGA) has detected evolved water, H2, SO2, H2S, NO, CO2, CO, O2, and HCl from two eolian…”
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Changes in the Raman and Fluorescence Spectroscopic Signatures of Irradiated Organic‐Mineral Mixtures: Implications for Molecular Biosignature Detection on Mars by Fox, A. C., Jakubek, R. S., Eigenbrode, J. L.

“…The search for potential molecular biosignatures on Mars is complicated by its harsh radiation environment that can alter or destroy the primary molecular…”
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Light and variable 37Cl/35Cl ratios in rocks from Gale Crater, Mars: Possible signature of perchlorate by Farley, K.A., Martin, P., Archer, P.D., Atreya, S.K., Conrad, P.G., Eigenbrode, J.L., Fairén, A.G., Franz, H.B., Freissinet, C., Glavin, D.P., Mahaffy, P.R., Malespin, C., Ming, D.W., Navarro-Gonzalez, R., Sutter, B.

“…Cl isotope ratios measured on HCl thermally evolved from as-yet-unknown phases in sedimentary rocks and sand in Gale Crater provide unexpected insights to the…”
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Application of TMAH thermochemolysis to the detection of nucleobases: Application to the MOMA and SAM space experiment by He, Y., Buch, A., Morisson, M., Szopa, C., Freissinet, C., Williams, A., Millan, M., Guzman, M., Navarro-Gonzalez, R., Bonnet, J.Y., Coscia, D., Eigenbrode, J.L., Malespin, C.A., Mahaffy, P., Glavin, D.P., Dworkin, J.P., Lu, P., Johnson, S.S.

“…Thermochemolysis of seven nucleobases—adenine, thymine, uracil, cytosine, guanine, xanthine, and hypoxanthine—in tetramethylammonium hydroxide (TMAH) was…”
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Organic molecules revealed in Mars’s Bagnold Dunes by Curiosity’s derivatization experiment by Millan, M., Teinturier, S., Malespin, C. A., Bonnet, J. Y., Buch, A., Dworkin, J. P., Eigenbrode, J. L., Freissinet, C., Glavin, D. P., Navarro-González, R., Srivastava, A., Stern, J. C., Sutter, B., Szopa, C., Williams, A. J., Williams, R. H., Wong, G. M., Johnson, S. S., Mahaffy, P. R.

“…The wet chemistry experiments on the Sample Analysis at Mars instrument on NASA’s Curiosity rover were designed to facilitate gas chromatography mass…”
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Sedimentary Organics in Glen Torridon, Gale Crater, Mars: Results From the SAM Instrument Suite and Supporting Laboratory Analyses by Millan, M., Williams, A. J., McAdam, A. C., Eigenbrode, J. L., Steele, A., Freissinet, C., Glavin, D. P., Szopa, C., Buch, A., Summons, R. E., Lewis, J. M. T., Wong, G. M., House, C. H., Sutter, B., McIntosh, O., Bryk, A. B., Franz, H. B., Pozarycki, C., Stern, J. C., Navarro‐Gonzalez, R., Archer, D. P., Fox, V., Bennett, K., Teinturier, S., Malespin, C., Johnson, S. S., Mahaffy, P. R.

“…The Sample Analysis at Mars (SAM) suite instrument on board NASA's Curiosity rover has characterized the inorganic and organic chemical composition of seven…”
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Murchison Meteorite Analysis Using Tetramethylammonium Hydroxide (TMAH) Thermochemolysis Under Simulated Sample Analysis at Mars (SAM) Pyrolysis‐Gas Chromatography‐Mass Spectrometry Conditions by Mojarro, A., Buch, A., Dworkin, J. P., Eigenbrode, J. L., Fressinet, C., Glavin, D. P., Szopa, C., Millan, M., Williams, A. J., Summons, R. E.

“…The Sample Analysis at Mars (SAM) instrument aboard the Curiosity Rover at Gale crater can characterize organic molecules from scooped and drilled samples via…”
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Pyrolysis of Oxalate, Acetate, and Perchlorate Mixtures and the Implications for Organic Salts on Mars by Lewis, J. M. T., Eigenbrode, J. L., Wong, G. M., McAdam, A. C., Archer, P. D., Sutter, B., Millan, M., Williams, R. H., Guzman, M., Das, A., Rampe, E. B., Achilles, C. N., Franz, H. B., Andrejkovičová, S., Knudson, C. A., Mahaffy, P. R.

“…Organic salts, such as Fe, Ca, and Mg oxalates and acetates, may be widespread radiolysis and oxidation products of organic matter in Martian surface…”
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Constraining Alteration Processes Along the Siccar Point Group Unconformity, Gale Crater, Mars: Results From the Sample Analysis at Mars Instrument by Sutter, B., McAdam, A. C., Wong, G. M., Clark, J. V., Archer, P. D., Franz, H. B., Gasda, P. J., Ming, D. W., Yen, A., Lewis, J. M. T., Schwenzer, S. P., Turner, S. M. R., Rampe, E. B., Eigenbrode, J. L., Stern, J. C., Thompson, L. M., Dehouck, E., Bedford, C., Banham, S., Bryk, A. B., O’Connell‐Cooper, C., House, C. S., Millan, M., Freissinet, C., Navarro‐Gonzalez, R., Mahaffy, P. R., Malespin, C. A.

“…Results from the Sample Analysis at Mars‐evolved gas analyzer on board the Mars Science Laboratory Curiosity rover constrained the alteration history and…”
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Analysis of aromatic carboxylic acid and calcium salt couples with gas chromatography-mass spectrometry: Implications and comparison with in situ measurements at Mars' surface by McIntosh, O., Freissinet, C., Buch, A., Lewis, J.M.T., Millan, M., Williams, A.J., Fornaro, T., Eigenbrode, J.L., Brucato, J., Szopa, C.

“…Aromatic organic salts such as benzoates or phthalates may be widespread degradation products of organic molecules at the surface of Mars. The low volatility…”
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