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Cometary Versus Asteroidal Origin of Chondritic Meteorites

Published online by Cambridge University Press:  12 April 2016

George W. Wetherill
George W. Wetherill*
Affiliation:
University of California, Los Angeles

Extract

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Much of what we know about the early history of the solar system has been learned from the study of meteorites. This results from the fact, demonstrated by isotopic age measurements, that all of the various classes of stone and iron meteorites were formed 4.6 X 109 yr ago within a short period of time, probably less than 100 million yr in duration. This is also the age of Earth and the Moon and may be presumed to be the time of formation of the solid bodies in the solar system. Measurements of the products of the decay of the extinct radioactive isotopes 129Xe and 244Pu show, furthermore, that the formation of these solid bodies occurred within 100 million yr of the time of separation of the solar nebula from interstellar matter. Except for physical fragmentation into smaller bodies, the chemical and mineralogical composition of most meteorites has been essentially unaltered since this time during the formation interval of the solar system.

Type
Part II-Origin of Asteroids Interrelations with Comets, Meteorites, and Meteors
Information
International Astronomical Union Colloquium , Volume 12: Physical Studies of Minor Planets , 1971 , pp. 447 - 460
Copyright
Copyright © NASA 1971

References

References

Arnold, J.R. 1965a, The Origin of Meteorites as Small Bodies, 2, The Model. Astrophys. J. 141, 1536–1547.CrossRefGoogle Scholar
Arnold, J.R. 1965b, The Origin of Meteorites as Small Bodies, 3, General Considerations. Astrophys. J. 141, 1548–1556.CrossRefGoogle Scholar
Dohnanyi, J.S. 1970, On the Origin and Distribution of Meteoroids. J. Geophys. Res. 75, 3468–3493.Google Scholar
Gault, D.E. 1969, On Cosmic Ray Exposure Ages of Stone Meteorites (abstract). Meteoritics 4, 177.Google Scholar
Gopalan, K., and Wetherill, G.W. 1971, Rubidium-Strontium Studies on Black Hypersthene Chondrites: Effects of Shock and Reheating. J. Geophys. Res., in press.Google Scholar
Heymann, D. 1967, On the Origin of Hypersthene Chondrites: Ages and Shock Effects of Black Chondrites. Icarus 6, 189–221.CrossRefGoogle Scholar
McCrosky, R.E. 1967, Orbits of Photographic Meteors. Smithson. Observ. Special Rept. 252.Google Scholar
Marsden, B.G. 1968, Comets and Non-gravitational Forces. Astron. J. 73, 367–379.Google Scholar
Öpik, E.J. 1951, Collision Probabilities With the Planets and the Distribution of Interplanetary Matter. Proc. Roy. Irish Acad. Sect. A 54, 164–199.Google Scholar
Öpik, E.J. 1963, Survival of Comet Nuclei and the Asteroids. Adv. Astron. Astrophys. 2, 219–262.Google Scholar
Öpik, E.J. 1966, The Stray Bodies in the Solar System, 2, The Cometary Origin of Meteorites. .Adv. Astron. Astrophys. 4, 302–336.Google Scholar
Paddack, S.J. 1969, Rotational Bursting of Small Celestial Bodies: Effects of Radiation Pressure. J. Geophys. Res. 74, 4379–4381.CrossRefGoogle Scholar
Wetherill, G.W. 1967, Collisions in the Asteroid Belt. J. Geophys. Res. 72, 2429–2444.CrossRefGoogle Scholar
Wetherill, G.W. 1968a, Time of Fall and Origin of Stone Meteorites. Science 159, 79–82.CrossRefGoogle ScholarPubMed
Wefherill, G.W. 1968b, Dynamical Studies of Asteroidal and Cometary Orbits and Their Relation to the Origin of Meteorites. Origin and Distribution of the Elements (ed., Ahrens, L.), pp. 423–443. Pergamon Press. New York.Google Scholar
Wetherill, G. W. 1969, Relationships Between Orbits and Sources of Chondritic Meteorites. Meteorite Research (ed., Millman, P.M.), pp. 573–589. D. Reidel. Dordrecht.Google Scholar
Wetherill, G.W. 1971, Origin and Age of Chondritic Meteorites. Vinogradov 75th Anniv. Vol. Moscow. In press.Google Scholar
Wetherill, G. W., and Williams, J.G. 1968, Evaluation of the Apollo Asteroids as Sources of Stone Meteorites. J. Geophys. Res. 73, 635–648.CrossRefGoogle Scholar
Duke, M.B., and Silver, L.T. 1967, Petrology of Eucrites, Howardites, and Mesosideritcs. Geochim. Cosmochim. Acta 31, 1637–1665.Google Scholar
Mazor, E., and Anders, E. 1967, Primordial Gases in the Jodzie Howardite and the Origin of Gas-Rich Meteorites. Geochim. Cosmochim. Acta 31, 1441–1456.Google Scholar
Müller, O., and Zahringer, J. 1966, Chemische Unterschiede bei Uredelgashaltigen Steinmeteoriten. Earth Planet. Sci. Lett. 1, 25–29.Google Scholar
Wasson, J.T., and Wai, C.M. 1970, Composition of the Metal, Schreibersite, and Perryite of Enstatite Achondrites and the Origin of Enstatite Chondrites and Achondrites. Geochim. Cosmochim. Acta 34, 169–184.Google Scholar
Duke, M.B., and Silver, L.T. 1967, Petrology of Eucrites, Howardites, and Mesosideritcs. Geochim. Cosmochim. Acta 31, 1637–1665.Google Scholar
Mazor, E., and Anders, E. 1967, Primordial Gases in the Jodzie Howardite and the Origin of Gas-Rich Meteorites. Geochim. Cosmochim. Acta 31, 1441–1456.Google Scholar
Müller, O., and Zahringer, J. 1966, Chemische Unterschiede bei Uredelgashaltigen Steinmeteoriten. Earth Planet. Sci. Lett. 1, 25–29.Google Scholar
Wasson, J.T., and Wai, C.M. 1970, Composition of the Metal, Schreibersite, and Perryite of Enstatite Achondrites and the Origin of Enstatite Chondrites and Achondrites. Geochim. Cosmochim. Acta 34, 169–184.Google Scholar