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Krestianinov E, Amelin Y, Yin QZ, Cary P, Huyskens MH, Miller A, Dey S, Hibiya Y, Tang H, Young ED, Pack A, Di Rocco T. Igneous meteorites suggest Aluminium-26 heterogeneity in the early Solar Nebula. Nat Commun 2023; 14:4940. [PMID: 37643999 PMCID: PMC10465487 DOI: 10.1038/s41467-023-40026-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Accepted: 07/04/2023] [Indexed: 08/31/2023] Open
Abstract
The short-lived radionuclide aluminium-26 (26Al) isotope is a major heat source for early planetary melting. The aluminium-26 - magnesium-26 (26Al-26Mg) decay system also serves as a high-resolution relative chronometer. In both cases, however, it is critical to establish whether 26Al was homogeneously or heterogeneously distributed throughout the solar nebula. Here we report a precise lead-207 - lead-206 (207Pb-206Pb) isotopic age of 4565.56 ± 0.12 million years (Ma) for the andesitic achondrite Erg Chech 002. Our analysis, in conjunction with published 26Al-26Mg data, reveals that the initial 26Al/27Al in the source material of this achondrite was notably higher than in various other well-preserved and precisely dated achondrites. Here we demonstrate that the current data clearly indicate spatial heterogeneity of 26Al by a factor of 3-4 in the precursor molecular cloud or the protoplanetary disk of the Solar System, likely associated with the late infall of stellar materials with freshly synthesized radionuclides.
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Affiliation(s)
- Evgenii Krestianinov
- Research School of Earth Sciences, Australian National University, Canberra, 2601, Australia.
| | - Yuri Amelin
- Research School of Earth Sciences, Australian National University, Canberra, 2601, Australia
- Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, GD, 510640, China
- Korea Basic Science Institute, Ochang, Cheongwon, Cheongju, Chungbuk, 28119, Korea
| | - Qing-Zhu Yin
- Department of Earth and Planetary Sciences, University of California, Davis, Davis, CA, 95616, USA
| | - Paige Cary
- Department of Earth and Planetary Sciences, University of California, Davis, Davis, CA, 95616, USA
| | - Magdalena H Huyskens
- Department of Earth and Planetary Sciences, University of California, Davis, Davis, CA, 95616, USA
| | - Audrey Miller
- Department of Earth and Planetary Sciences, University of California, Davis, Davis, CA, 95616, USA
| | - Supratim Dey
- Department of Earth and Planetary Sciences, University of California, Davis, Davis, CA, 95616, USA
| | - Yuki Hibiya
- Department of General Systems Studies, University of Tokyo, Komaba 3-8-1, Meguro, Tokyo, 153-0041, Japan
- Research Center for Advanced Science and Technology, University of Tokyo, Komaba 4-6-1, Meguro, Tokyo, 153-8904, Japan
| | - Haolan Tang
- Department of Earth, Planetary and Space Sciences, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Edward D Young
- Department of Earth, Planetary and Space Sciences, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Andreas Pack
- Geochemistry and Isotope Geology Department, Georg-August-Universität Göttingen, Goldschmidtstraße 1, 37077, Göttingen, Germany
| | - Tommaso Di Rocco
- Geochemistry and Isotope Geology Department, Georg-August-Universität Göttingen, Goldschmidtstraße 1, 37077, Göttingen, Germany
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