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Globally distributed iridium layer preserved within the Chicxulub impact structure

Goderis, Steven ; Sato, Honami ; Ferrière, Ludovic ; Schmitz, Birger LU ; Burney, David ; Kaskes, Pim ; Vellekoop, Johan ; Wittmann, Axel ; Schulz, Toni and Chernonozhkin, Stepan M. , et al. (2021) In Science Advances 7(9).
Abstract

The Cretaceous-Paleogene (K-Pg) mass extinction is marked globally by elevated concentrations of iridium, emplaced by a hypervelocity impact event 66 million years ago. Here, we report new data from four independent laboratories that reveal a positive iridium anomaly within the peak-ring sequence of the Chicxulub impact structure, in drill core recovered by IODP-ICDP Expedition 364. The highest concentration of ultrafine meteoritic matter occurs in the post-impact sediments that cover the crater peak ring, just below the lowermost Danian pelagic limestone. Within years to decades after the impact event, this part of the Chicxulub impact basin returned to a relatively low-energy depositional environment, recording in unprecedented detail... (More)

The Cretaceous-Paleogene (K-Pg) mass extinction is marked globally by elevated concentrations of iridium, emplaced by a hypervelocity impact event 66 million years ago. Here, we report new data from four independent laboratories that reveal a positive iridium anomaly within the peak-ring sequence of the Chicxulub impact structure, in drill core recovered by IODP-ICDP Expedition 364. The highest concentration of ultrafine meteoritic matter occurs in the post-impact sediments that cover the crater peak ring, just below the lowermost Danian pelagic limestone. Within years to decades after the impact event, this part of the Chicxulub impact basin returned to a relatively low-energy depositional environment, recording in unprecedented detail the recovery of life during the succeeding millennia. The iridium layer provides a key temporal horizon precisely linking Chicxulub to K-Pg boundary sections worldwide.

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author collaboration
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Science Advances
volume
7
issue
9
article number
eabe3647
publisher
American Association for the Advancement of Science (AAAS)
external identifiers
  • scopus:85102098183
  • pmid:33627429
ISSN
2375-2548
DOI
10.1126/sciadv.abe3647
language
English
LU publication?
yes
id
20c69e9e-fe73-43f6-bec7-942d1e110362
date added to LUP
2021-03-17 09:24:18
date last changed
2024-06-13 08:57:32
@article{20c69e9e-fe73-43f6-bec7-942d1e110362,
  abstract     = {{<p>The Cretaceous-Paleogene (K-Pg) mass extinction is marked globally by elevated concentrations of iridium, emplaced by a hypervelocity impact event 66 million years ago. Here, we report new data from four independent laboratories that reveal a positive iridium anomaly within the peak-ring sequence of the Chicxulub impact structure, in drill core recovered by IODP-ICDP Expedition 364. The highest concentration of ultrafine meteoritic matter occurs in the post-impact sediments that cover the crater peak ring, just below the lowermost Danian pelagic limestone. Within years to decades after the impact event, this part of the Chicxulub impact basin returned to a relatively low-energy depositional environment, recording in unprecedented detail the recovery of life during the succeeding millennia. The iridium layer provides a key temporal horizon precisely linking Chicxulub to K-Pg boundary sections worldwide.</p>}},
  author       = {{Goderis, Steven and Sato, Honami and Ferrière, Ludovic and Schmitz, Birger and Burney, David and Kaskes, Pim and Vellekoop, Johan and Wittmann, Axel and Schulz, Toni and Chernonozhkin, Stepan M. and Claeys, Philippe and de Graaff, Sietze J. and Déhais, Thomas and de Winter, Niels J. and Elfman, Mikael and Feignon, Jean Guillaume and Ishikawa, Akira and Koeberl, Christian and Kristiansson, Per and Neal, Clive R. and Owens, Jeremy D. and Schmieder, Martin and Sinnesael, Matthias and Vanhaecke, Frank and van Malderen, Stijn J.M. and Bralower, Timothy J. and Gulick, Sean P.S. and Kring, David A. and Lowery, Christopher M. and Morgan, Joanna V. and Smit, Jan and Whalen, Michael T.}},
  issn         = {{2375-2548}},
  language     = {{eng}},
  number       = {{9}},
  publisher    = {{American Association for the Advancement of Science (AAAS)}},
  series       = {{Science Advances}},
  title        = {{Globally distributed iridium layer preserved within the Chicxulub impact structure}},
  url          = {{http://dx.doi.org/10.1126/sciadv.abe3647}},
  doi          = {{10.1126/sciadv.abe3647}},
  volume       = {{7}},
  year         = {{2021}},
}