The dissipation of the solar nebula constrained by impacts and core cooling in planetesimals
Rapid cooling of planetesimal cores has been inferred for several iron meteorite parent bodies on the basis of metallographic cooling rates, and linked to the loss of their insulating mantles during impacts. However, the timing of these disruptive events is poorly constrained. Here, we used the shor...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
| Language: | English |
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NATURE PORTFOLIO
2022
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| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.11937/94369 |
| _version_ | 1848765862043975680 |
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| author | Hunt, A.C. Theis, K.J. Rehkämper, M. Benedix, Gretchen Andreasen, R. Schönbächler, M. |
| author_facet | Hunt, A.C. Theis, K.J. Rehkämper, M. Benedix, Gretchen Andreasen, R. Schönbächler, M. |
| author_sort | Hunt, A.C. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Rapid cooling of planetesimal cores has been inferred for several iron meteorite parent bodies on the basis of metallographic cooling rates, and linked to the loss of their insulating mantles during impacts. However, the timing of these disruptive events is poorly constrained. Here, we used the short-lived 107Pd–107Ag decay system to date rapid core cooling by determining Pd–Ag ages for iron meteorites. We show that closure times for the iron meteorites equate to cooling in the time frame ~7.8–11.7 Myr after calcium–aluminium-rich inclusion formation, and that they indicate that an energetic inner Solar System persisted at this time. This probably results from the dissipation of gas in the protoplanetary disk, after which the damping effect of gas drag ceases. An early giant planet instability between 5 and 14 Myr after calcium–aluminium-rich inclusion formation could have reinforced this effect. This correlates well with the timing of impacts recorded by the Pd–Ag system for iron meteorites. |
| first_indexed | 2025-11-14T11:41:59Z |
| format | Journal Article |
| id | curtin-20.500.11937-94369 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:41:59Z |
| publishDate | 2022 |
| publisher | NATURE PORTFOLIO |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-943692024-04-04T06:51:01Z The dissipation of the solar nebula constrained by impacts and core cooling in planetesimals Hunt, A.C. Theis, K.J. Rehkämper, M. Benedix, Gretchen Andreasen, R. Schönbächler, M. Science & Technology Physical Sciences Astronomy & Astrophysics PD-AG CHRONOMETRY IRON-METEORITES CLOSURE TEMPERATURE PLATINUM ISOTOPES GIANT PLANETS HISTORY SYSTEM ORIGIN ACCRETION CRYSTALLIZATION Rapid cooling of planetesimal cores has been inferred for several iron meteorite parent bodies on the basis of metallographic cooling rates, and linked to the loss of their insulating mantles during impacts. However, the timing of these disruptive events is poorly constrained. Here, we used the short-lived 107Pd–107Ag decay system to date rapid core cooling by determining Pd–Ag ages for iron meteorites. We show that closure times for the iron meteorites equate to cooling in the time frame ~7.8–11.7 Myr after calcium–aluminium-rich inclusion formation, and that they indicate that an energetic inner Solar System persisted at this time. This probably results from the dissipation of gas in the protoplanetary disk, after which the damping effect of gas drag ceases. An early giant planet instability between 5 and 14 Myr after calcium–aluminium-rich inclusion formation could have reinforced this effect. This correlates well with the timing of impacts recorded by the Pd–Ag system for iron meteorites. 2022 Journal Article http://hdl.handle.net/20.500.11937/94369 10.1038/s41550-022-01675-2 English NATURE PORTFOLIO restricted |
| spellingShingle | Science & Technology Physical Sciences Astronomy & Astrophysics PD-AG CHRONOMETRY IRON-METEORITES CLOSURE TEMPERATURE PLATINUM ISOTOPES GIANT PLANETS HISTORY SYSTEM ORIGIN ACCRETION CRYSTALLIZATION Hunt, A.C. Theis, K.J. Rehkämper, M. Benedix, Gretchen Andreasen, R. Schönbächler, M. The dissipation of the solar nebula constrained by impacts and core cooling in planetesimals |
| title | The dissipation of the solar nebula constrained by impacts and core cooling in planetesimals |
| title_full | The dissipation of the solar nebula constrained by impacts and core cooling in planetesimals |
| title_fullStr | The dissipation of the solar nebula constrained by impacts and core cooling in planetesimals |
| title_full_unstemmed | The dissipation of the solar nebula constrained by impacts and core cooling in planetesimals |
| title_short | The dissipation of the solar nebula constrained by impacts and core cooling in planetesimals |
| title_sort | dissipation of the solar nebula constrained by impacts and core cooling in planetesimals |
| topic | Science & Technology Physical Sciences Astronomy & Astrophysics PD-AG CHRONOMETRY IRON-METEORITES CLOSURE TEMPERATURE PLATINUM ISOTOPES GIANT PLANETS HISTORY SYSTEM ORIGIN ACCRETION CRYSTALLIZATION |
| url | http://hdl.handle.net/20.500.11937/94369 |