Pickersgill, A. E. , Mark, D. F. , Lee, M. R. , Kelley, S. P. and Jolley, D. W. (2021) The Boltysh impact structure: An early Danian impact event during recovery from the K-Pg mass extinction. Science Advances, 7(25), eabe6530. (doi: 10.1126/sciadv.abe6530) (PMID:34144979) (PMCID:PMC8213223)
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Abstract
Both the Chicxulub and Boltysh impact events are associated with the K-Pg boundary. While Chicxulub is firmly linked to the end-Cretaceous mass extinction, the temporal relationship of the ~24-km-diameter Boltysh impact to these events is uncertain, although it is thought to have occurred 2 to 5 ka before the mass extinction. Here, we conduct the first direct geochronological comparison of Boltysh to the K-Pg boundary. Our 40Ar/39Ar age of 65.39 ± 0.14/0.16 Ma shows that the impact occurred ~0.65 Ma after the mass extinction. At that time, the climate was recovering from the effects of the Chicxulub impact and Deccan trap flood volcanism. This age shows that Boltysh has a close temporal association with the Lower C29n hyperthermal recorded by global sediment archives and in the Boltysh crater lake sediments. The temporal coincidence raises the possibility that even a small impact event could disrupt recovery of the Earth system from catastrophic events.
| Item Type: | Articles |
|---|---|
| Additional Information: | Analyses for this work were funded by National Environment Research Council through grant NERC analytical grant Argon Isotope Facility IP/1626/0516: Dating of impact crater events associated with the K-Pg boundary. During this work A.E.P. was supported by the Natural Sciences and Engineering Research Council of Canada (NSERC PGS-D), the University of Glasgow, and Leverhulme Trust Research Project Grant number RPG-2018-061. M. R. L. was supported by the Science and Technology Facilities Council through grant ST/N000846/1. |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Pickersgill, Dr Annemarie and Mark, Professor Darren and Lee, Professor Martin |
| Authors: | Pickersgill, A. E., Mark, D. F., Lee, M. R., Kelley, S. P., and Jolley, D. W. |
| College/School: | College of Science and Engineering > School of Geographical and Earth Sciences College of Science and Engineering > Scottish Universities Environmental Research Centre |
| Journal Name: | Science Advances |
| Publisher: | American Association for the Advancement of Science |
| ISSN: | 2375-2548 |
| ISSN (Online): | 2375-2548 |
| Published Online: | 18 June 2021 |
| Copyright Holders: | Copyright © 2021 The Authors |
| First Published: | First published in Science Advances 7(25):eabe6530 |
| Publisher Policy: | Reproduced under a Creative Commons licence |
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