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How old is the crater copernicus?

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Abstract

Two KREEP glass concentrates separated from lunar soil 12033 have been dated with the Ar39/Ar40 method. Both samples show low-temperature plateaus in accordance with a major outgassing of the KREEP glasses (800 ± 40) × 106 yr ago. This is the age of Copernicus, provided the identification of KREEP glass as ray material ejected during the Copernican event is true (Hubbardet al., 1971). The exposure age of the two KREEP glass concentrates is 200 × 106 yr and thus distinctly smaller than the ejection age. Possible explanations for this are discussed.

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References

  1. Arnold, J. R., Peterson, L. E., Metzger, A. E., and Trombka, J. I.: 1972a, ‘Gamma-Ray Spectrometer Experiment’, Apollo 15 Preliminary Science Report, 16-1–16-6, NASA SP-284.

  2. Arnold, J. R.: 1972b, private communication.

  3. Dalrymple, G. B. and Lanphere, M. A.: 1971,Earth Planetary Sci. Letters 12, 300.

  4. Eberhardt, P., Eugster, O., Geiss, J., Grögler, N., Schwarzmüller, J., Stettler, A., and Weber, L.: 1972a, ‘When was the Apollo 12 KREEP Ejected?’. Revised abstracts of papers presented at the Third Lunar Sci. Conf., Houston, pp. 206-208.

  5. Eberhardt, P., Geiss, J., Graf, H., Grögler, N., Krähenbühl, U., Schwaller, H., and Stettler, A.: 1972b, ‘Noble Gas Investigations of Lunar Rocks 10017 and 10071’, submitted toGeochim. Cosmochim. Acta.

  6. Funkhouser, J.: 1971,Earth Planetary Sci. Letters 12, 263.

  7. Funkhouser, J., Schaeffer, O. A., Bogard, D. D., and Zähringer, J.: 1972, ‘Noble Gas Abundances in Lunar Material I. Solar Wind Implanted Gases in Mare Tranquillitatis and Oceanus Procellarum’. Preprint.

  8. Heymann, D. and Yaniv, A.: 1970,Proc. Apollo 11 Lunar Sci. Conf., Geochim. Cosmochim. Acta, Suppl. 1,2, 1261–1267. Pergamon.

  9. Hubbard, N. J. and Gast, P. W.: 1971,Proc. 2nd Lunar Sci. Conf., Geochim. Cosmochim. Acta, Suppl. 2,2, 999–1020. MIT Press.

  10. Jäger, E., Niggli, E., and Baethge, H.: 1963,Schweiz. Min. Petr. Mitt. 43, 465.

  11. Lanphere, M. A.: 1968,Can. J. Earth Sci. 5, 757.

  12. Lanphere, M. A. and Dalrymple, G. B.: 1967,Geochim. Cosmochim. Acta 31, 1091.

  13. Marvin, U. B., Wood, J. A., Taylor, G. J., Reid, J. B., Powell, B. N., Dickey, J. S., and Bower, J. F.: 1971,Proc. Second Lunar Sci. Conf., Geochim. Cosmochim. Acta, Suppl. 2,1, 679–699. MIT Press.

  14. Merrihue, C. M.: 1965,Trans. Am. Geophys. Union 46, 125.

  15. Merrihue, C. M. and Turner, G.: 1966,J. Geophys. Res. 71, 2852.

  16. Meyer, C., Brett, R., Hubbard, N. J., Morrison, D. A., McKay, D. S., Aitken, F. K., Takeda, H., and Schonfeld, E.: 1971,Proc. Second Lunar Sci. Conf., Geochim. Cosmochim. Acta, Suppl. 2,1, 393–411. MIT Press.

  17. Mitchell, J. G.: 1968,Geochim. Cosmochim. Acta 32, 781.

  18. Pepin, R. O. and Nyquist, L. E.: 1972, ‘K-Ar Dating of Lunar Soils: Apollo 12 and Apollo 14’. Revised abstracts of papers presented at the Third Lunar Sci. Conf., Houston, pp. 602-604.

  19. Quaide, W.: 1972, ‘Mineralogy and Origin of Fra Mauro Fines and Breccias’. Revised abstracts of papers presented at the Third Lunar Sci. Conf., Houston, pp. 627-629.

  20. Shoemaker, E. M., Batson, R. M., Bean, A. L., Conrad, C. Jr., Dahlem, D. H., Goddard, E. N., Hait, M. H., Larson, K. B., Schaber, G. G., Schleicher, D. L., Sutton, R. L., Swann, G. A., and Waters, A. C.: 1970, ‘Preliminary Geologic Investigation of the Apollo 12 Landing Site’. Apollo 12 Preliminary Science Report, pp. 113-182, NASA SP-235.

  21. Silver, L. T.: 1971,Trans. Am. Geophys. Union 52, 534 (abstract).

  22. Turner, G.: 1969, in P. M. Millman (ed.),Meteorite Research, D. Reidel, Holland, p. 407.

  23. Turner, G.: 1970,Proc. Apollo 11 Lunar Sci. Conf., Geochim. Cosmochim. Acta, Suppl. 1,2, 1665–1684. Pergamon.

  24. Voshage, H.: 1967,Z. Naturforsch. 22a, 477.

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Paper dedicated to Prof. Harold C. Urey on the occasion of his 80th birthday on 29 April 1973.

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Eberhardt, P., Geiss, J., Grögler, N. et al. How old is the crater copernicus?. The Moon 8, 104–114 (1973). https://doi.org/10.1007/BF00562752

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Keywords

  • Lunar Soil