Search for primitive matter in the Solar System

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Guy Libourel, Patrick Michel, Marco Delbo, Clément Ganino, Alejandra Recio-Blanco, Patrick de Laverny, Michael E. Zolensky, Alexander N. Krot

Icarus
Volume 282, 15 January 2017, Pages 375-379

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“In this note, we show that neither the age of an object, nor its mineralogy is discriminant enough for revealing its primitiveness, and propose a new parameterization scheme based on the processes the matter underwent since its delivery to the Solar System. By ranking celestial objects and their constituents, two antagonistic sources of primitive materials in the protoplanetary disk emerge, one close to the Sun resulting from evaporation, condensation and melting of the protosolar molecular cloud dust followed by accretion into asteroidal bodies, and the other at large heliocentric distances resulting from agglomeration of the protosolar and solar dust into cometary bodies, the latter reservoir remaining poorly sampled so far.”

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