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The great isotopic dichotomy of the early Solar System
- Source :
- Nature Astronomy. 4:32-40
- Publication Year :
- 2019
- Publisher :
- Springer Science and Business Media LLC, 2019.
-
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. 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. Cosmochemical measurements reveal the existence of two distinct reservoirs of non-carbonaceous and carbonaceous materials, originating from the inner and outer protoplanetary disk, respectively, which separated after the first million years after the birth of the Solar System, possibly due to the rapid growth of Jupiter’s core.
- Subjects :
- Solar System
010504 meteorology & atmospheric sciences
Astronomy and Astrophysics
Protoplanetary disk
01 natural sciences
Accretion (astrophysics)
Astrobiology
Jupiter
Planet
0103 physical sciences
Asteroid belt
Terrestrial planet
Formation and evolution of the Solar System
010303 astronomy & astrophysics
Geology
0105 earth and related environmental sciences
Subjects
Details
- ISSN :
- 23973366
- Volume :
- 4
- Database :
- OpenAIRE
- Journal :
- Nature Astronomy
- Accession number :
- edsair.doi...........8e3b515dd138fa0b702a86b6aaee8785