The Boltysh impact structure: An early Danian impact event during recovery from the K-Pg mass extinction

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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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.
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 (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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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
300755Were hypervelocity impact structures cradles of life?Martin LeeLeverhulme Trust (LEVERHUL)RPG-2018-061GES - Geography
172314A journey from the solar nebula to planetary bodies: cycling of heat, water and organicsMartin LeeScience and Technology Facilities Council (STFC)ST/N000846/1GES - Earth Sciences