Journal article
Lifetime of the outer solar system nebula from carbonaceous chondrites
- Abstract:
- The evolution and lifetime of protoplanetary disks (PPDs) play a central role in the formation and architecture of planetary systems. Astronomical observations suggest that PPDs evolve in two timescales, accreting onto the star for up to several million years (Myr) followed by gas dissipation within ≲1 Myr. Because solar nebula magnetic fields are sustained by the gas of the protoplanetary disk, we can use paleomagnetic measurements to infer the lifetime of the solar nebula. Here, we use paleomagnetic measurements of meteorites to constrain this lifetime and investigate whether the solar nebula had a two-timescale evolution. We report on paleomagnetic measurements of bulk subsamples of two CO carbonaceous chondrites: Allan Hills A77307 and Dominion Range 08006. If magnetite in these meteorites can acquire a crystallization remanent magnetization that recorded the ambient field during aqueous alteration, our measurements suggest that the local magnetic field strength at the CO parent body location was <0.9 μT at some time between 2.7 and 5.1 Myr after the formation of calcium-aluminum-rich inclusions. Coupled with previous paleomagnetic studies, we conclude that the dissipation of the solar nebula in the 3–7 AU region occurred <1.5 Myr after the dissipation of the nebula in the 1–3 AU region, suggesting that protoplanetary disks go through a two-timescale evolution in their lifetime, consistent with dissipation by photoevaporation and/or magnetohydrodynamic winds. We also discuss future directions necessary to obtain robust records of solar nebula fields using bulk chondrites, including obtaining ages from meteorites and experimental work to determine how magnetite acquires magnetization during chondrite parent body alteration.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
Actions
Access Document
- Files:
-
-
(Preview, Version of record, 1.1MB, Terms of use)
-
- Publisher copy:
- 10.1029/2021JE007139
Authors
- Publisher:
- Wiley
- Journal:
- Journal of Geophysical Research: Planets More from this journal
- Volume:
- 127
- Issue:
- 7
- Article number:
- e2021JE007139
- Publication date:
- 2022-06-29
- Acceptance date:
- 2022-05-23
- DOI:
- EISSN:
-
2169-9100
- ISSN:
-
2169-9097
- Language:
-
English
- Keywords:
- Pubs id:
-
1261656
- Local pid:
-
pubs:1261656
- Deposit date:
-
2022-05-30
Terms of use
- Copyright holder:
- Borlina et al.
- Copyright date:
- 2022
- Rights statement:
- © 2022 The Authors. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
If you are the owner of this record, you can report an update to it here: Report update to this record