Disrupting and Destroying Families from Differentiated Parent Bodies

Details Disrupting and Destroying Families from Differentiated Parent Bodies Disrupting and Destroying Families from Differentiated Parent Bodies

Jan 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996eiaf.conf....6d&link_type=abstract

Workshop on Evolution of Igneous Asteroids: Focus on Vesta and the HED Meterorites, p. 6

Physics

Asteroids, Basalt, Iron Meteorites, Vesta Asteroid, Olivine, Asteroid Belts, Simulation

Scientific paper

One of the major dilemmas with our current understanding of the formation and evolution of asteroids is associated with the differentiated asteroids. Meteoritical, spectroscopic, and radar evidence strongly support the idea that iron meteorites are derived from asteroidal parent bodies that are to be found among the M-type asteroids. A subset of the M asteroids are thought to be the collisionally exposed cores of differentiated parent bodies; asteroid 16 Psyche is the largest and best-studied example of such a body. The dilemma posed by this model is that there is little evidence left for any mantle or crustal material from the parent body(ies); essentially only the metallic cores have survived. So what has happened to remove the volumetrically dominant material from the parent body? The favored explanation to account for the near absence of olivine-rich and basaltic small asteroids (the Vesta case excepted) is that collisions have ground down the mantle and crustal material to sizes smaller than can be observed today We will present results from a variety of simulations on the efficacy of collisional grinding at removing mantle and crustal material from the observed population of asteroids and will offer predictions as to the sizes at which such material might still exist in the present asteroid belt.

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