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14 - Isotopic Constraints on the Formation of the Main Belt

from Part III - Implications for the Formation and Evolution of the Solar System

Published online by Cambridge University Press:  01 April 2022

By
Katherine R. Bermingham  and
Thomas S. Kruijer
Edited by
Simone Marchi ,
Carol A. Raymond  and
Christopher T. Russell
Simone Marchi
Affiliation:
Southwest Research Institute, Boulder, Colorado
Carol A. Raymond
Affiliation:
California Institute of Technology
Christopher T. Russell
Affiliation:
University of California, Los Angeles
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Summary

Nucleosynthetic and radiogenic isotope data from meteorites have significantly advanced the understanding of how the protoplanetary disk was structured during the accretion of planetary precursors. Meteorites exhibit an isotopic dichotomy between carbonaceous (CC) and non-carbonaceous (NC) meteorites. This NC–CC dichotomy, combined with the chronology of meteorite parent body accretion, implies a potentially strict spatial divide between the inner (NC) and outer (CC) protoplanetary disk which lasted several million years. This divide may have been facilitated by early formation of the gas giant planets, which acted as a barrier, thereby significantly influencing the chemical evolution of the disk and thus the planet building process. These meteorite-derived findings and their implications for planet evolution are discussed here, with an emphasis on the role that Vesta and Ceres play in piecing together the history of the Solar System, as these bodies may be considered as samples of the inner and outer protoplanetary disk, respectively.

Keywords

Nucleosynthetic isotope anomaliesShort-lived chronometersMeteoritesEarly Solar System dynamicsProtoplanetary diskPlanet formationJupiterNC–CC dichotomy
Type
Chapter
Information
Vesta and Ceres
Insights from the Dawn Mission for the Origin of the Solar System
 , pp. 212 - 226
Publisher: Cambridge University Press
Print publication year: 2022

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