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Title: The great isotopic dichotomy of the early Solar System

Abstract

The isotopic composition of meteorites and terrestrial planets holds important clues about the earliest history of the Solar System and the processes of planet formation. Recent work has shown that meteorites exhibit a fundamental isotopic dichotomy between non-carbonaceous (NC) and carbonaceous (CC) groups, which most likely represent material from the inner and outer Solar System, respectively. Here we review the isotopic evidence for this NC–CC dichotomy, discuss its origin and highlight the far-reaching implications for the dynamics of the solar protoplanetary disk. The NC–CC dichotomy combined with the chronology of meteorite parent-body accretion mandate an early and prolonged spatial separation of inner (NC) and outer (CC) disk reservoirs, lasting between ~1 and ~4 Myr after Solar System formation. This is most easily reconciled with the early and rapid growth of Jupiter’s core, inhibiting substantial exchange of material from inside and outside its orbit. Here, the growth and migration of Jupiter also led to the later implantation of CC bodies into the inner Solar System and, therefore, can explain the co-occurrence of NC and CC bodies in the asteroid belt, and the delivery of volatile and water-rich CC bodies to the terrestrial planets.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Univ. of Münster (Germany)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1592039
Report Number(s):
LLNL-JRNL-798366
Journal ID: ISSN 2397-3366; 1000953
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Nature Astronomy
Additional Journal Information:
Journal Volume: 4; Journal Issue: 1; Journal ID: ISSN 2397-3366
Publisher:
Springer Nature
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; Meteorites; isotopes; short-lived radionuclides; protoplanetary disk; accretion; planetesimals; Jupiter

Citation Formats

Kruijer, Thomas S., Kleine, Thorsten, and Borg, Lars E. The great isotopic dichotomy of the early Solar System. United States: N. p., 2019. Web. doi:10.1038/s41550-019-0959-9.
Kruijer, Thomas S., Kleine, Thorsten, & Borg, Lars E. The great isotopic dichotomy of the early Solar System. United States. doi:10.1038/s41550-019-0959-9.
Kruijer, Thomas S., Kleine, Thorsten, and Borg, Lars E. Mon . "The great isotopic dichotomy of the early Solar System". United States. doi:10.1038/s41550-019-0959-9.
@article{osti_1592039,
title = {The great isotopic dichotomy of the early Solar System},
author = {Kruijer, Thomas S. and Kleine, Thorsten and Borg, Lars E.},
abstractNote = {The isotopic composition of meteorites and terrestrial planets holds important clues about the earliest history of the Solar System and the processes of planet formation. Recent work has shown that meteorites exhibit a fundamental isotopic dichotomy between non-carbonaceous (NC) and carbonaceous (CC) groups, which most likely represent material from the inner and outer Solar System, respectively. Here we review the isotopic evidence for this NC–CC dichotomy, discuss its origin and highlight the far-reaching implications for the dynamics of the solar protoplanetary disk. The NC–CC dichotomy combined with the chronology of meteorite parent-body accretion mandate an early and prolonged spatial separation of inner (NC) and outer (CC) disk reservoirs, lasting between ~1 and ~4 Myr after Solar System formation. This is most easily reconciled with the early and rapid growth of Jupiter’s core, inhibiting substantial exchange of material from inside and outside its orbit. Here, the growth and migration of Jupiter also led to the later implantation of CC bodies into the inner Solar System and, therefore, can explain the co-occurrence of NC and CC bodies in the asteroid belt, and the delivery of volatile and water-rich CC bodies to the terrestrial planets.},
doi = {10.1038/s41550-019-0959-9},
journal = {Nature Astronomy},
number = 1,
volume = 4,
place = {United States},
year = {2019},
month = {12}
}

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