Abstract
ANALYSES of meteorites that originated on Mars provide important insights into the geological and atmospheric evolution of the planet. Such analyses have hitherto been restricted to relatively young martian rocks1 (the oldest martian meteorites have an age of approximately 1.3 billion years). But the recently recognized2 martian meteorite, Allan Hills 84001, which is distinct from the other martian meteorites2–4, shows evidence for a much older age5,6. Here we report an analysis of the shock-alteration history of this meteorite based on argon isotope dating, from which we derive a shock age of 4.0 ± 0.1 billion years. The age and geological history of this meteorite suggest that it came from the heavily cratered Noachian-age terrains of Mars's southern hemisphere, and it may thus provide an absolute chronology for this region of the planet, independent of that inferred from the cratering record. The shock age of the meteorite also coincides with that of the so-called Lunar Cataclysm (a relatively short period during which many of the craters on the Moon are believed to have formed), supporting the idea7 that intense bombardment was widespread throughout the inner Solar System between 3.9 and 4.1 billion years ago.
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References
McSween, H. Y. Jr Meteoritics 29, 757–779 (1994).
Mittlefeldt, D. W. Meteoritics 29, 214–221 (1994).
Trieman, A. H. Meteoritics 30, 294–302 (1995).
Rornanek, C. S. et al. Nature 372, 655–657 (1994).
Jagoutz, E., Sorowka, A., Vogel, J. D. & Wänke, H. Meteoritics 29, 478–479 (1994).
Nyquist, L. E., Bansal, B. M., Wiesmann, H. & Shih, C.-Y. Lunar planet Sci. XXVI, 1065–1066 (1995).
Bogard, D. D. Meteoritics 30, 244–268 (1995).
Neukum, G. & Hiller, K. J. geophys. Res. 86, 3097–3121 (1981).
Hartmann, W. K. J. geophys. Res. 78, 4096–4116 (1973).
Neukum, G. & Wise, D. U. Science 194, 1381–1387 (1976).
Tera, F., Papanastassiou, D. A. & Wasserburg, G. J. Earth planet. Sci. Lett. 22, 1–21 (1974).
Turner, G. Phys. Chem. Earth 10, 145–195 (1977).
Ryder, G. Lunar planet. Sci. XX, 934–935 (1989).
Strom, R. G., Croft, S. K. & Barlow, N. G. in Mars (eds Kieffer, H. H., Jakosky, B. M., Snyder, C. W. & Matthews, M. S.) 383–423 (Univ. Arizona Press, Tucson, 1992).
Turner, G. in Meteorites and the Early Solar System (eds Kerridge, J. F. & Matthews, M. S.) 276–288 (Univ. Arizona Press, Tucson, 1988).
Miura, Y. N., Nagao, K., Sugiura, N., Sagawa, H. & Matsubara, K. Geochim. cosmochim. Acta 59, 2105–2114 (1995).
Swindle, T. D., Grier, J. A. & Burkland, M. K. Geochim. cosmochim. Acta 59, 793–801 (1995).
Mittlefeldt, D. W. Meteoritics 29, 900 (1994).
Drake, M. J. in Asteroids (ed. Gehrels, T.) 765–782 (Univ. Arizona Press, Tuscon, 1988).
Binzel, R. P. Meteoritics 30, 486–487 (1995).
Swindle, T. D., Caffee, M. W. & Hohenberg, C. M. Geochim. cosmochim. Acta 50, 1001–1025 (1986).
Knott, S. F., Ash, R. D. & Turner, G. Lunar planet. Sci. XXVI, 765–766 (1995).
Bogard, D. D., Husain, L. & Nyquist, L. E. Geochim. cosmochim. Acta 43, 1047–1055 (1979).
Shih, C.-Y. et al. Geochim. cosmochim. Acta 46, 2323–2344 (1982).
Podosek, F. A. Earth planet. Sci. Lett. 19, 135–144 (1973).
Bogard, D. D. & Husain, L. Geophys. Res. Lett. 4, 49–71 (1977).
Bogard, D. D. & Nyquist, L. E. Meteoritics 14, 356 (1979).
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Ash, R., Knott, S. & Turner, G. A 4-Gyr shock age for a martian meteorite and implications for the cratering history of Mars. Nature 380, 57–59 (1996). https://doi.org/10.1038/380057a0
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DOI: https://doi.org/10.1038/380057a0
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