High-precision timeline for Earth's most severe extinction
The end-Permian mass extinction was the most severe loss of marine and terrestrial biota in the last 542 My. Understanding its cause and the controls on extinction/recovery dynamics depends on an accurate and precise age model. U-Pb zircon dates for five volcanic ash beds from the Global Stratotype...
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| Formato: | Artigo |
| Idioma: | en_US |
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National Academy of Sciences (U.S.)
2014
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| Acesso em linha: | http://hdl.handle.net/1721.1/91514 https://orcid.org/0000-0001-9722-469X |
| _version_ | 1826196018427854848 |
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| author | Bowring, Samuel A. Shen, Shu-zhong Burgess, Seth |
| author2 | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences |
| author_facet | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Bowring, Samuel A. Shen, Shu-zhong Burgess, Seth |
| author_sort | Bowring, Samuel A. |
| collection | MIT |
| description | The end-Permian mass extinction was the most severe loss of marine and terrestrial biota in the last 542 My. Understanding its cause and the controls on extinction/recovery dynamics depends on an accurate and precise age model. U-Pb zircon dates for five volcanic ash beds from the Global Stratotype Section and Point for the Permian-Triassic boundary at Meishan, China, define an age model for the extinction and allow exploration of the links between global environmental perturbation, carbon cycle disruption, mass extinction, and recovery at millennial timescales. The extinction occurred between 251.941 ± 0.037 and 251.880 ± 0.031 Mya, an interval of 60 ± 48 ka. Onset of a major reorganization of the carbon cycle immediately precedes the initiation of extinction and is punctuated by a sharp (3‰), short-lived negative spike in the isotopic composition of carbonate carbon. Carbon cycle volatility persists for ∼500 ka before a return to near preextinction values. Decamillenial to millennial level resolution of the mass extinction and its aftermath will permit a refined evaluation of the relative roles of rate-dependent processes contributing to the extinction, allowing insight into postextinction ecosystem expansion, and establish an accurate time point for evaluating the plausibility of trigger and kill mechanisms. |
| first_indexed | 2024-09-23T10:19:32Z |
| format | Article |
| id | mit-1721.1/91514 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T10:19:32Z |
| publishDate | 2014 |
| publisher | National Academy of Sciences (U.S.) |
| record_format | dspace |
| spelling | mit-1721.1/915142024-05-15T03:14:34Z High-precision timeline for Earth's most severe extinction Bowring, Samuel A. Shen, Shu-zhong Burgess, Seth Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Burgess, Seth D. Bowring, Samuel A. The end-Permian mass extinction was the most severe loss of marine and terrestrial biota in the last 542 My. Understanding its cause and the controls on extinction/recovery dynamics depends on an accurate and precise age model. U-Pb zircon dates for five volcanic ash beds from the Global Stratotype Section and Point for the Permian-Triassic boundary at Meishan, China, define an age model for the extinction and allow exploration of the links between global environmental perturbation, carbon cycle disruption, mass extinction, and recovery at millennial timescales. The extinction occurred between 251.941 ± 0.037 and 251.880 ± 0.031 Mya, an interval of 60 ± 48 ka. Onset of a major reorganization of the carbon cycle immediately precedes the initiation of extinction and is punctuated by a sharp (3‰), short-lived negative spike in the isotopic composition of carbonate carbon. Carbon cycle volatility persists for ∼500 ka before a return to near preextinction values. Decamillenial to millennial level resolution of the mass extinction and its aftermath will permit a refined evaluation of the relative roles of rate-dependent processes contributing to the extinction, allowing insight into postextinction ecosystem expansion, and establish an accurate time point for evaluating the plausibility of trigger and kill mechanisms. National Science Foundation (U.S.) (Continental Dynamics Grant EAR-0807475) United States. National Aeronautics and Space Administration (Astrobiology Grant NNA08CN84A) National Science Foundation (U.S.) (Instrumentation and Facilities EAR-0931839) 2014-11-10T14:43:53Z 2014-11-10T14:43:53Z 2014-02 2013-09 Article http://purl.org/eprint/type/JournalArticle 0027-8424 1091-6490 http://hdl.handle.net/1721.1/91514 Burgess, Seth D., Samuel Bowring, and Shu-zhong Shen. “High-Precision Timeline for Earth’s Most Severe Extinction.” Proceedings of the National Academy of Sciences 111, no. 9 (February 10, 2014): 3316–3321. https://orcid.org/0000-0001-9722-469X en_US http://dx.doi.org/10.1073/pnas.1317692111 Proceedings of the National Academy of Sciences Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf National Academy of Sciences (U.S.) PNAS |
| spellingShingle | Bowring, Samuel A. Shen, Shu-zhong Burgess, Seth High-precision timeline for Earth's most severe extinction |
| title | High-precision timeline for Earth's most severe extinction |
| title_full | High-precision timeline for Earth's most severe extinction |
| title_fullStr | High-precision timeline for Earth's most severe extinction |
| title_full_unstemmed | High-precision timeline for Earth's most severe extinction |
| title_short | High-precision timeline for Earth's most severe extinction |
| title_sort | high precision timeline for earth s most severe extinction |
| url | http://hdl.handle.net/1721.1/91514 https://orcid.org/0000-0001-9722-469X |
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