Globally distributed iridium layer preserved within the Chicxulub impact structure
(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
- author collaboration
- organization
- publishing date
- 2021
- 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
-
- pmid:33627429
- scopus:85102098183
- 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
- 2024-09-19 18:14:16
@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}}, }