Martian sub-surface ionising radiation: biosignatures and geology
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Published:2007-07-30
Issue:4
Volume:4
Page:545-558
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ISSN:1726-4189
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Container-title:Biogeosciences
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language:en
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Short-container-title:Biogeosciences
Author:
Dartnell L. R.,Desorgher L.,Ward J. M.,Coates A. J.
Abstract
Abstract. The surface of Mars, unshielded by thick atmosphere or global magnetic field, is exposed to high levels of cosmic radiation. This ionising radiation field is deleterious to the survival of dormant cells or spores and the persistence of molecular biomarkers in the subsurface, and so its characterisation is of prime astrobiological interest. Here, we present modelling results of the absorbed radiation dose as a function of depth through the Martian subsurface, suitable for calculation of biomarker persistence. A second major implementation of this dose accumulation rate data is in application of the optically stimulated luminescence technique for dating Martian sediments. We present calculations of the dose-depth profile in the Martian subsurface for various scenarios: variations of surface composition (dry regolith, ice, layered permafrost), solar minimum and maximum conditions, locations of different elevation (Olympus Mons, Hellas basin, datum altitude), and increasing atmospheric thickness over geological history. We also model the changing composition of the subsurface radiation field with depth compared between Martian locations with different shielding material, determine the relative dose contributions from primaries of different energies, and discuss particle deflection by the crustal magnetic fields.
Publisher
Copernicus GmbH
Subject
Earth-Surface Processes,Ecology, Evolution, Behavior and Systematics
Reference63 articles.
1. Acuna, M H., Connerney, J. E P., Ness, N F., Lin, R P., Mitchell, D., Carlson, C W., McFadden, J., Anderson, K A., Reme, H., Mazelle, C., Vignes, D., Wasilewski, P., and Cloutier, P.: Global Distribution of Crustal Magnetization Discovered by the Mars Global Surveyor MAG/ER Experiment, Science, 284, 790–793, 1999. 2. Agostinelli, S., Allison, J., Amako, K., Apostolakis, J., Araujo, H., Arce, P., Asai, M., Axen, D., Banerjee, S., Barrand, G., Behner, F., Bellagamba, L., Boudreau, J., Broglia, L., Brunengo, A., Burkhardt, H., Chauvie, S., Chuma, J., Chytracek, R., Cooperman, G., Cosmo, G., Degtyarenko, P., Dell'Acqua, A., Depaola, G., Dietrich, D., Enami, R., Feliciello, A., Ferguson, C., Fesefeldt, H., Folger, G., Foppiano, F., Forti, A., Garelli, S., Giani, S., Giannitrapani, R., Gibin, D., Cadenas, J. J G., Gonzalez, I., Abril, G G., Greeniaus, G., Greiner, W., Grichine, V., Grossheim, A., Guatelli, S., Gumplinger, P., Hamatsu, R., Hashimoto, K., Hasui, H., Heikkinen, A., Howard, A., Ivanchenko, V., Johnson, A., Jones, F W., Kallenbach, J., Kanaya, N., Kawabata, M., Kawabata, Y., Kawaguti, M., Kelner, S., Kent, P., Kimura, A., Kodama, T., Kokoulin, R., Kossov, M., Kurashige, H., Lamanna, E., Lampen, T., Lara, V., Lefebure, V., Lei, F., Liendl, M., Lockman, W., Longo, F., Magni, S., Maire, M., Medernach, E., Minamimoto, K., de~Freitas, P M., Morita, Y., Murakami, K., Nagamatu, M., Nartallo, R., Nieminen, P., Nishimura, T., Ohtsubo, K., Okamura, M., O'Neale, S., Oohata, Y., Paech, K., Perl, J., Pfeiffer, A., Pia, M G., Ranjard, F., Rybin, A., Sadilov, S., Di~Salvo, E., Santin, G., Sasaki, T., Savvas, N., Sawada, Y., et~al.: GEANT4 – A simulation toolkit, Nuclear Instruments and Methods In Physics Research Section A – Accelerators Spectrometers Detectors And Associated Equipment, 506, 250–303, iSI Document Delivery No.: 696WP, 2003. 3. Amako, K., Guatelli, S., Ivanchenko, V N., Maire, M., Mascialino, B., Murakami, K., Nieminen, P., Pandola, L., Parlati, S., Pia, M G., Piergentili, M., Sasaki, T., and Urban, L.: Comparison of Geant4 Electromagnetic Physics Models Against the NIST Reference Data, Nuclear Science, IEEE Transactions on, 52, 910–918, 0018-9499, 2005. 4. Ambrosi, R M., Talboys, D L., Sims, M R., Bannister, N P., Makarewicz, M., Stevenson, T., Hutchinson, I B., Watterson, J. I W., Lanza, R C., and Richter, L.: Neutron activation analysis, gamma ray spectrometry and radiation environment monitoring instrument concept: GEORAD, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 539, 198–216, 2005. 5. Audette, M., Chen, X., Houee-Levin, C., Potier, M., and Maire, M L.: Protein gamma-radiolysis in frozen solutions is a macromolecular surface phenomenon: fragmentation of lysozyme, citrate synthase and alpha-lactalbumin in native or denatured states, Int. J. Radiation Biol., 76, 673, https://doi.org/10.1080/095530000138349, 2000.
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