NASA Astrobiology

April 2018MapX: 2D XRF for Planetary Exploration - Image Formation and Optic Characterization

Sarrazin, P., Blake, D., Gailhanou, M., Marchis, F., Chalumeau, C., Webb, S., … Bristow, T. (2018). MapX: 2D XRF for Planetary Exploration - Image Formation and Optic Characterization. Journal of Instrumentation, 13(04), C04023–C04023. doi:10.1088/1748-0221/13/04/c04023

Highly heterogeneous “poikiloredox” conditions in the early Ediacaran Yangtze Sea

Jin, C., Li, C., Algeo, T. J., O'Connell, B., Cheng, M., Shi, W., … Planavsky, N. J. (2018). Highly heterogeneous “poikiloredox” conditions in the early Ediacaran Yangtze Sea. Precambrian Research. doi:10.1016/j.precamres.2018.04.012

Evidence for episodic oxygenation in a weakly redox-buffered deep mid-Proterozoic ocean

Planavsky, N. J., Slack, J. F., Cannon, W. F., O'Connell, B., Isson, T. T., Asael, D., … Bekker, A. (2018). Evidence for episodic oxygenation in a weakly redox-buffered deep mid-Proterozoic ocean. Chemical Geology, 483, 581–594. doi:10.1016/j.chemgeo.2018.03.028

A model for the oceanic mass balance of rhenium and implications for the extent of Proterozoic ocean anoxia

Sheen, A. I., Kendall, B., Reinhard, C. T., Creaser, R. A., Lyons, T. W., Bekker, A., … Anbar, A. D. (2018). A model for the oceanic mass balance of rhenium and implications for the extent of Proterozoic ocean anoxia. Geochimica et Cosmochimica Acta, 227, 75–95. doi:10.1016/j.gca.2018.01.036

Simultaneous In Situ Analysis of Carbon and Nitrogen Isotope Ratios in Organic Matter by Secondary Ion Mass Spectrometry

Simultaneous In Situ Analysis of Carbon and Nitrogen Isotope Ratios in Organic Matter by Secondary Ion Mass Spectrometry (2018). Geostandards and Geoanalytical Research, None(None), None. doi:10.1111/ggr.12209

Hyperactivity and Dust Composition of Comet 103P/Hartley 2 During the EPOXI Encounter

Harker, D. E., Woodward, C. E., Kelley, M. S. P., & Wooden, D. H. (2018). Hyperactivity and Dust Composition of Comet 103P/Hartley 2 During the EPOXI Encounter. The Astronomical Journal, 155(5), 199. doi:10.3847/1538-3881/aab778

Magnetic Fields Recorded by Chondrules Formed in Nebular Shocks

Mai, C., Desch, S. J., Boley, A. C., & Weiss, B. P. (2018). Magnetic Fields Recorded by Chondrules Formed in Nebular Shocks. The Astrophysical Journal, 857(2), 96. doi:10.3847/1538-4357/aab711

The Photochemistry of Unprotected DNA and DNA inside Bacillus subtilis Spores Exposed to Simulated Martian Surface Conditions of Atmospheric Composition, Temperature, Pressure, and Solar Radiation

Nicholson, W. L., Schuerger, A. C., & Douki, T. (2018). The Photochemistry of Unprotected DNA and DNA inside Bacillus subtilis Spores Exposed to Simulated Martian Surface Conditions of Atmospheric Composition, Temperature, Pressure, and Solar Radiation. Astrobiology, 18(4), 393–402. doi:10.1089/ast.2017.1721

Rapid effects of terrestrial alteration on highly siderophile elements in the Sutter's Mill meteorite

Walker, R. J., Yin, Q-Z., & Heck, P. R. (2018). Rapid effects of terrestrial alteration on highly siderophile elements in the Sutter's Mill meteorite. Meteoritics & Planetary Science. doi:10.1111/maps.13102

Constraining the climate and ocean pH of the early Earth with a geological carbon cycle model

Krissansen-Totton, J., Arney, G. N., & Catling, D. C. (2018). Constraining the climate and ocean pH of the early Earth with a geological carbon cycle model. Proceedings of the National Academy of Sciences, None, 201721296. doi:10.1073/pnas.1721296115

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