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Internal Constitution and Mechanisms of Asteroid Fragmentation

Published online by Cambridge University Press:  12 April 2016

Aviva Brecher
Aviva Brecher*
Affiliation:
University of California, San Diego

Extract

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It has been generally assumed in the past that the fragmentation of asteroidal bodies and the production of meteorites are solely the result of collision events. (See Dohnanyi, 1969; Hartmann and Hartmann, 1968; Wetherill, 1967.)

A possible mechanism of noncollisional fragmentation will be proposed below, its proper framework of applicability will be defined, and evidence suggesting and supporting its existence will be adduced. Briefly, it is shown that the presence of even trace amounts of hydrogen in meteoritic metal phases (Edwards, 1955) may have caused the parent bodies of iron meteorites to undergo, spontaneously, delayed brittle fracture under the action of prolonged slow stresses, the imprint of which has been recorded in the phase structure of meteorites (Baldanza and Pialli, 1969). This phenomenon, termed “hydrogen embrittlement,” has been amply documented in the literature on the metallurgy of ferrous metals (Bernstein, 1970;Tetelman, 1969).

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. 305 - 314
Copyright
Copyright © NASA 1971

References

References

Anders, E. 1964, Origin, Age and Composition of Meteorites. Space Sci. Rev. 3, 583.Google Scholar
Anders, E. 1965, Fragmentation History of Asteroids. Icarus 4, 399.Google Scholar
Arnold, J.R. 1965, The Origin of Meteorites as Small Bodies. III-General Considerations. Astrophys. J. 141, 1548.Google Scholar
Arrhenius, G., and Alfvén, H. 1971, Fractionation and Condensation in Space. Earth Planet. Sci. Lett. 10, 253.CrossRefGoogle Scholar
Axon, H.J. 1969, Pre-Terrestrial Deformation Effects in Iron Meteorites. Meteorite Research (ed., Millman, P.M.), p. 796. D. Reidel. Dordrecht.Google Scholar
Baldanza, H., and Pialli, G. 1969, Dynamically Deformed Structures in Some Meteorites. Meteorite Research (ed., Mfflman, P.M.), p. 806. D. Reidel. Dordrecht.CrossRefGoogle Scholar
Barth, C.F., and Steigerwald, E.A. 1970, Evaluation of Hydrogen Embrittlement Mechanisms. Met. Trans. 1, 3451.Google Scholar
Bernstein, I.M. 1970, The Role of Hydrogen in the Embrittlement of Iron and Steel. Mater. Sci. Eng. 6, 1.Google Scholar
Brecher, A. 1971, Hydrogen-Embrittlement and Implications for the Production of Iron Meteorites, in preparation.Google Scholar
Brecher, A., and Alfvén, H. 1969–70, Size and Mass Distributions of Families, Jet Streams and “Bachelor” Asteroids. (Unpublished)Google Scholar
Buseck, P.R., and Goldstein, J.I. 1968, Pallasitic Meteorites: Implications Regarding the Deep Structure of Asteroids. Science 159, 300.Google Scholar
Chatelain, A., Kline, D., Kolopus, J.L., and Weeks, R.A. 1970, Electron and Nuclear Magnetic Resonance of Three Chondritic Meteorites. J. Geophys. Res. 75, 5681.Google Scholar
Dauvillier, A. 1963, Cosmic Dust, p. 60. G. Newnes. London.Google Scholar
Dohnanyi, J.S. 1969, Collisional Model of Asteroids and Their Debris. J. Geophys. Res. 74, 2531.Google Scholar
Edwards, G. 1953, Hydrogen and Deuterium in Iron Meteorites. Proc. Conf. Nucl. Processes Geol. Settings, p. 48.Google Scholar
Edwards, G. 1955, Isotopie Composition of Meteoritic Hydrogen. Nature 176, 109.Google Scholar
Fanington, O.C. 1915, Meteorites, p. 190. Univ. of Chicago Press. Chicago.Google Scholar
Fireman, E.L., D’Amico, J.C., and De Felice, J.C. 1970, Tritium and Argon Radioactivities in Lunar Material. Science 167, 566.Google Scholar
Fricker, P.E., Goldstein, J.I., and Summers, A.L. 1970, Cooling Rates and Thermal Histories of Iron and Stony-Iron Meteorites. Geochim. Cosmochim. Acta 34, 475.Google Scholar
Goldstein, J.I., and Short, J.M. 1967, The Iron Meteorites, Their Thermal History and Parent Bodies. Geochim. Cosmochim. Acta 31, 1733.Google Scholar
Gordon, R.B. 1970, Mechanical Properties of Iron Meteorites and the Structure of Their Parent Planets. J. Geophys. Res. 75, 439.Google Scholar
Groeneveld, T.P., Fletcher, E.E., and Elsea, A.R. 1966, Review of Literature on Hydrogen Embrittlement. Special Report to NASA (NAS 8–20029). Google Scholar
Hartmann, W.K., and Hartmann, A.C. 1968, Asteroid Collisions and Evolution of Asteroidal Mass Distribution and Meteoritic Flux. Icarus 8, 361.Google Scholar
Jaeger, R.R., and Lipschutz, M.E. 1967, Implications of Shock Effects in Iron Meteorites. Geochim. Cosmochim. Acta 31, 1811.CrossRefGoogle Scholar
Jain, A.V., and Lipschutz, M.E. 1969, Shock Histories of Hexahedrites and Ga-Ge Group III Octahedrites. Meteorite Research (ed., Millman, P.M.), p. 826. D. Reidel. Dordrecht.Google Scholar
Johnson, E.W., and Hill, M.L. 1960, The Diffusivity of Hydrogen in a-Iron. Trans. Met. Soc. AIME 218, 1104.Google Scholar
Knox, R. Jr. 1970, The Yield Strength of Meteoritic Iron. Meteoritics 5, 63.Google Scholar
Levin, B.J. 1965, Origin of Meteorites. Planet. Space. Sci. 13, 243.Google Scholar
Lord, H.C. 1969, Possible Solar Primordial Hydrogen in the Pesyanoe Meteorite. Earth Planet. Sci. Lett. 6, 332.Google Scholar
McCord, T.E., Adams, J.B., and Johnson, T.V. 1970, Asteroid Vesta, Spectral Reflectivity and Compositional Implications. Science 168, 1445.CrossRefGoogle ScholarPubMed
Nash, L.K., and Baxter, G.P. 1947, The Determination of Gases in Terrestrial Irons and Steels. J. Amer. Chem. Soc. 69, 2534.Google Scholar
Nelson, H.G., Williams, D.P., and Tetelman, A.S. 1971, Embrittlement of a Ferrous Alloy in a Partially Dissociated Hydrogen Environment. Metallurg. Trans. 2, 953–959.Google Scholar
Nininger, H.H. 1963, Meteorite Distribution on the Earth. The Solar System (eds., Middlehurst, B.M. and Kuiper, G.P.), vol. 4, p. 162. Univ. of Chicago Press. Chicago.Google Scholar
Powell, B.N. 1969, Petrology and Chemistry of Mesosiderites-I. Textures and Composition of Nickel-Iron. Geochim. Cosmochim. Acta 33, 789.Google Scholar
Tetelman, A.S. 1969, The Mechanism of Hydrogen Embrittlement in Steel. Fundamental Aspects of Stress Corrosion Cracking (eds., Staehle, R.W. Forty, A.J. and van Rooyen, D.), pp. 446–464. Nat. Assoc. Corrosion Engs. Houston.Google Scholar
Tetelman, A.S., and McEvily, A.J. Jr. 1967, Fracture of Structural Materials, p. 456. John Wiley & Sons, Inc. New York Google Scholar
Voshage, H. 1967, Bestrahlungsalter und Herkunft der Eisenmeteorite. Z. Naturforsch. A 22, 477.CrossRefGoogle Scholar
Wetherill, G.W. 1967, Collisions in the Asteroid Belt. J. Geophys. Res. 72, 2429.CrossRefGoogle Scholar
Whipple, F.L. 1963, On the Structure of the Cometary Nucleus. The Solar System (eds., Middlehurst, B.M. and Kuiper, G.P.), vol. 4, ch. 19. Univ. of Chicago Press. Chicago.Google Scholar
Wood, J.A. 1964, Cooling Rates and Parent Planets of Several Iron Meteorites. Icarus 3, 429.Google Scholar
Wood, J.A. 1967, Chondrites: Their Metallic Minerals, Thermal Histories and Parent Planets. Icarus 6, 1.Google Scholar

Discussion References

Anders, E. 1965, Fragmentation History of Asteroids. Icarus 4, 399.CrossRefGoogle Scholar
Arnold, J.R. 1965, The Origin of Meteorites as Small Bodies. Ill-General Considerations. Astrophys. J. 141, 1548.Google Scholar
Nininger, H.H. 1963, Meteorite Distribution on the Earth. The Solar System (eds., Middlehurst, B.M. and Kuiper, G.P.), vol. 4, p. 162. Univ. of Chicago Press. Chicago.Google Scholar